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WA1004-PT140113 Stormwater Pollution Prevention Plan Under General Permit No. TXR1 50000 For: 1 CITY OF COPPELL SH 121 WATER LINE RELOCATION SANDY LAKE ROAD TO N COPPELL ROAD Prepared for: BARSON UTILITIES, INC. 5326 W LEDBETTER DRIVE DALLAS, TEXAS 75236 SWPPP Preparation Date: 1/13/2014 Estimated Project Dates: Start of Construction: 1/2014 Completion of Construction: 7/2014 Prepared by: MEADE SERVICING GROUP 469-628-0688 FI7011 MEADE SERVICING GROUP 469-628-0688 EXECUTIVE SUMMARY CITY OF COPPELL SH 121 WATER LINE RELOCATION The United States Environmental Protection Agency(EPA) promulgated storm water regulations pursuant to the National Pollutant Discharge Elimination System (NPDES) Program. Texas is an NPDES delegated state and the TCEQ continues to administer the general construction permit for storm water activities at this time. This Storm Water Pollution Prevention Plan (SWPPP) has been developed in accordance with the conditions of the General Permit for Storm Water Discharges from Construction Activity authorized pursuant to TCEQ TPDES Program. The purpose of the SWPPP is to minimize the potential release of pollutants directly or indirectly into the storm water collection system or waters of the United States. To achieve this objective the permittee(s)will be required to implement the TCEQ TPDES policies and procedures presented in this SWPPP including, but not limited to, the following; Prominently post in place for public viewing at the construction site (such as alongside a building permit) a brief Project description; and the location of the SWPPP if the site is inactive or does not have an on-site location to store the plan. • Conduct regular inspections of the erosion and sediment control. These inspections will occur weekly. • Based on the outcome of the inspections, implement any needed repairs or modifications to the control(s) within seven calendar days following the inspection. • This SWPPP must be updated within seven calendar days each time a significant modification to the construction activities or pollutant control practices occur. These modifications shall be recorded on the SWPPP Amendment sheet located in Attachment 6 and in additional appendix material, if required. • Inspections shall be conducted, and a written report prepared, by a designated and qualified person familiar with the TCEO TPDES Storm Water General Permit, this SWPPP, and the Project. The Contractor and subcontractors will conduct the inspections and annotate the findings. Inspection reports are not required for walk-through in anticipation of storm events. This SWPPP must be compliance certified by the appropriate authorized representative. • Maintain a copy of this SWPPP on the Project Site throughout the duration of construction activities. • This SWPPP along with supporting documentation must be retained for a period of three (3) years after the completion of the Project. It is recommended that each of the operator(s) maintain a copy of the SWPPP for the three-year period. The SWPPP has been developed for the construction activities planned for the above-referenced Project. The SWPPP allows flexibility in complying with the provisions of the TCEQ TPDES General Permit for Storm Water Discharges Associated With Construction Activity. Table of Contents Introduction 1.1 Regulatory Background 1.2 Operator Responsibility 1.3 Plan Requirements 1.4 Plan Availability 1.5 Plan Maintenance 2. Site Description & Potential Contamination Sources 2.1 Site Description 2.1.1 Project Description 2.1.2 Disturbed Area and Runoff Coefficient 2.1.3 Soils 2.1.4 Major Grading Activities 2.1.5 Industrial Discharges 2.1.6 Watershed Information and Outfalls 2.1.7 Endangered Species & Historical Sites 2.2 Identification of Non-Storm Water Discharges and Illicit Connections 2.3 Potential Contamination Sources 3. Best Management Practices 3.1 General Best Management Practices 3.1.1 Good Housekeeping 3.1.2 Preventative Maintenance 3.1.3 Prohibited Activities 3.2 Sediment and Erosion Control 3.2.1 Interim Stabilization Practices 3.2.2 Permanent Stabilization Practices/Post Construction Controls 3.2.3 Temporary Stabilization Practices 3.2.4 Other Controls 3.2.5 Off-Site Support Areas 3.3 Approved State, Tribal or Local Plans 4. Inspections & Record Keeping 4.1 Inspection and Maintenance Procedures 4.2 Spills and Releases 4.3 Record Keeping 5. References Attachments 1: SWPPP& Signature Page Certifications 2: NOI/NOT 3: Construction Site Notice 4: Delegation Letters 5: Inspection Checklist 6: SWPPP Amendments, Major Grading Activities, BMP Installation Schedule 7: Contractor Certifications 8: BMP Specifications selected for Project 9: Maps,Pictures 10: Historic Preservation 11: Endangered Species 12: TPDES General Permit(Permit No. TXR150000) 1. Introduction This Storm Water Pollution Prevention Plan(SWPPP)is for the SH 121 Water Line Relocation located in the City of Coppell, Dallas County, Texas. The location of the project is shown on the site map in Attachment 9. The SWPPP identifies potential sources of storm water pollution, describes the practices to be completed to prevent discharges of pollutants to storm water, and outlines the procedures to comply with the requirements of the TPDES General Permit for Storm Water Discharges from Construction Activities. 1.1 Regulatory Background The U.S. Environmental Protection Agency(EPA)issued a final National Pollutant Discharge Elimination System (NPDES) Storm Water Baseline General Permit on September 9, 1992. This program is the means by which the EPA regulates discharges of potentially contaminated wastewater and storm water into waters of the U.S. through the issuance of permits applicable to specific sources. General Permits are available for coverage of certain industrial facilities, which have a relatively low potential for releasing pollutants into storm water. The Baseline General Permit expired on September 9, 1997. On September 29, 1995, and amended on September 24, 1996, the EPA promulgated the Multi-Sector General Permit(MSGP),which directed all facilities subject to the MSGP to prepare, retain and implement a Storm Water Pollution Prevention Plan(SWPPP)to ensure proper management of potential sources of storm water pollution. On July 6, 1998,EPA Region 6 reissued the NPDES General Permits for Storm Water Discharges from Construction Activities in Region 6. On March 5,2013,the state of Texas received delegated authority from the EPA under the TPDES General Permit TXR150000. This authorization will expire on March 3, 2018. This SWPPP is permitted under this TPDES General Permit. See Attachment 12 for a copy of this permit. 1.2 Operator Responsibilities The Primary Operator,the City of Coppell,has control over the plans and specifications as defined in Part III, Section B (1) of the permit and can make changes to specifications for the entire project as needed. The General Contractor, Barson Utilities.,has on-site operational control and is the "operator"with day to day operational control for implementation of the SWPPP, as defined in Part III, Section B (2) of the permit. The general contractor will be responsible for the implementation of the BMPs as described in this SWPPP. 1.3 Plan Requirements The SWPPP has been developed according to the provisions of the Permit and is intended to: • Identify actual and potential sources of pollution that may be reasonably expected to affect the quality of storm water discharges from the facility. • Establish practices and necessary storm water discharges from thfacility controls land that ensure compliance lwi with the terms and in conditions of the permit. • Describe how the selected practices and controls are appropriate for the Project and how each will effectively prevent or lessen pollution. • Discuss how controls and practices relate to each other such that together they comprise an integrated, facility-wide approach for pollution prevention in storm water discharges. 1.4 Plan Availability A copy of this plan must be kept on-site and the Construction Site Notice must be posted where it is easily located. If there is no place to store the SWPPP,the Construction Site Notice must specify where the SWPPP is located so it can be made readily available for review by authorized TCEQ personnel and other governmental personnel upon request. 1.5 Plan Maintenance This SWPPP shall be modified, as often as necessary, change in design, construction, operation, or maintance which mayimpa t the potential for pollutants to be discharged through storm water. The Executive Director may determine, following a review or inspection,that the Plan is not sufficient and require that the Plan be revised to correct all deficiencies. Modifications or updates to this SWPPP may also be required based upon inspections by the site operator, state or local agencies approving sediment and erosion control plans, and authorized TCEQ personnel. Such modifications will be based upon a determination that the SWPPP is proving ineffective in eliminating or significantly minimizing pollutants in discharges authorized under the permit. An Update Form, which can be used to update or amend the SWPPP, is provided in Attachment 6. 2. Site Description & Potential Contamination Sources 2.1 Site Descriptions The site for this project is located in the City of Coppell, Dallas County, Texas. The site runs alongside SH 121, from Sandy Lake Road to North Coppell Road, in the City of Coppell. The general topography is gently to moderately sloping away from road. 2.1.1 Project Description The Project will entail the installation of approximately 5,900 LF of 12"C900/DR 14 PVC Water Line and all work necessary to complete construction of the project. This project will relocate a water line that is in the TXDOT SH 121 right-of way. SH 121 is scheduled to be widened, therefore making this relocation necessary. The contractor is to furnish all materials, machinery, equipment, superintendence, transportation, tools, supplies,plant, labor and appurtenances necessary for the complete construction of all improvements shown on the plans which are made part of these specifications for the City of Coppell. Please refer to the Civil Plans for further details. All necessary BMP's are to be installed and maintained throughout the time needed to finalize the project. Finalization will mean that the project has been completed, site vegetation has been restored to 100%, coverage at 70% stand, and the City of Coppell accepts the project. The Contractor shall be responsible for the removal of all demolition spoils and of all necessary vegetation, such as native grasses, trees and underbrush that are located within the projects parameters and dispose of materials in accordance with all Federal, State and Local Laws and Ordinances. Owner: CITY OF COPPELL 255 PARKWAY BOULEVARD COPPELL, TEXAS 75019 Civil Engineer: TEAGUE NALL &PERKINS 17304 PRESTON ROAD, SUITE 1340 DALLAS, TEXAS 77252 General Contractor: BARSON UTILITIES, INC. 5326 W LEDBETTER DRIVE DALLAS, TEXAS 75236 2.1.2 Disturbed Area and Runoff Coefficient Because this Project is considered Linear in nature,it is estimated that the total acreage of 4.8 acres will be disturbed. If offsite support areas are required,the acreage shown should be modified to include those areas. The runoff coefficient is approximately 0.60. The runoff coefficient was determined based upon the existing(pre) and proposed(post)land use characteristics and weighted by area against the runoff coefficient for each land use. The land use runoff coefficients follow the guidelines provided in the DRAFT Design Manual for Development/Redevelopment, which is part of the Integrated Storm Water Management program developed by the North Central Texas Council of Governments. 2.1.3 Soils According to the NCSS (National Cooperative Soil Survey) Web site, the predominant soil types on this site are high plastic brown to brown tan clay and gray and tan gray shale clay and clayey shale. This soil type is a Hydrologic Soil Group D,Altoga Soil series, also called Houston Black Clay that has a high runoff potential due to very slow infiltration rates. These soils consist primarily of clays with high swelling potential,soils with permanently high water tables,soils with a clay pan or clay layer at or near the surface, and shallow soils over nearly impervious parent material. 2.1.4 Major Grading Activities The project site is being graded as necessary.The limits of construction are shown both on the BMP Map(is located is located in Attachment 8)and grading plans for project. The order of activities for the mass grading portion of the project are as follows: 1. Install stabilized construction exits/staging area(if necessary) 2. Install BMP Controls as necessary 3. Clearing and grubbing and perform any required demolition 4. Install new water line and improvements 5. Stabilize denuded areas and stockpiles as soon as practicable 6. Complete final grading and install permanent seeding and plantings in designated areas. Soil disturbing activities during construction activities include: clearing and grubbing; rough grading; utility construction;construction of concrete curb and gutters, sidewalks and roads; fine grading within rights-of-way and tracts;and landscaping.Finished slopes on public right-of-ways and easements shall not be steeper than 4:1 unless otherwise noted.All slopes greater than 6:1 shall be hydro mulched and maintained by the contractor until grass covers all parts of slope. 2.1.5 Industrial Discharges There are no storm water discharges from industrial facilities for the Project to on-site or near-site wetland or surface waters. Because there is no planned concrete excess, any un-used concrete will remain in concrete truck and removed from sites. No concrete washout will be required. Any dewatering activity will be pumped into dewatering bags, also known as silt bags or silt filter bags, and filtered water will drain into the Irving storm water system. 2.1.6 Watershed Information and Outfalls The site discharges into City of The Coppell Municipal Separate Sewer System(MS4)to Denton Creek(segment number 0825)to Grapevine Lake (segment number 0826). This watershed is part of the Trinity River Basin and USGS Catalog Unit number 12030103. Impaired Watersheds: According to the Water Quality Assessment report dated 2010, Grapevine Lake IS listed on the EPA/CWA 303(d)list of impaired waters. No TMDL data have been recorded by the EPA for this waterbody. Per the TXR150000 General Premit, Part II, Section C4, only impaired waters with a TMDL listing must incorporate the conditions with the approved TMDL. No TDML's are listed in the EPA/CWA 303(d)for this waterway. 2.1.7 Endangered Species & Historical Sites There were no observed habitats at this site for the endangered or threatened species listed on the U.S. Fish and Wildlife Service website for this county. See Attachment 11 for this listing. Furthermore,due to the urbanized nature of this site,the likelihood of endangered species habitats developing is very low. There are also no historical sites at the proposed construction site. See Attachment 10 for the listing of Historic Places in this county from the National Register of Historical Places. 2.2 Identification of Non-Storm Water Discharges and Illicit Connections It is possible that the following non-storm water discharges will occur from the site during the construction period: • Pavement wash waters (where no spills or leaks of toxic or hazardous materials have occurred) • Uncontaminated groundwater(from dewatering excavation) • Firefighting activities • Air conditioning condensate • Water used to control dust All non-storm water discharges will be filtered using silt fences and or hay bales, at points capable of appropriately handling any suspected contaminates contained within the discharge. Hyper chlorinated water from water line disinfection cannot be discharged to the storm sewer. 2.3 Potential Contamination Sources Potential Contamination Onsite Notes Sources Sediment/TSS IMINEIMMENEIMMI Collected at s.ecific •oint on site Concrete Wash Out ®MUM From construction activities From concrete trucks Paints From Port A Potties on site Pesticides From •aintin• activities Grease/Oils ®Used b landsca•in• com•an Oils Used b heav machine durin. •radin INCIIIIIIIIINIMIll Used b machine and tools durin• construction. Diesel Used durin• construction. Concrete Curing ®Used b heav e•ui•ment onsite Corn.ound Used as needed 111111 ■ 3. Best Management Practices 3.1 General Best Management Practices (BMPs) A number of baseline BMPs will be utilized on an at-need basis. The following sections present descriptions of procedures that are to be implemented throughout the Project. All BMPs shall conform to NCTCOG standards,Attachment 8,and the City of Coppell standards unless otherwise indicated in the Civil Plans. Because of the nature of this project, there are no plans for a concrete washout area. 3.1.1 Good Housekeeping • Vehicles and equipment should be washed down when and if excess sediment accumulates on the vehicles to prevent the tracking of sediment onto the streets. • Garbage, trash, and waste materials are to be collected for temporary containers on a daily basis. Wastes are to be regularly collected from these storage s containe aand transferred to a covered container for transport to an approved disposal facility. • Material delivery and storage should be delivered and stored in a specific area to limit the amount of disturbed ground. The BMP map should be modified as required to show the location of the Material Storage Area(MSA). • A site shall be designated for concrete washout on the map to limit the chance of the concrete washout coming into contact with storm water runoff if needed. • Construction materials will be covered or stored in a covered area if practical. • Products will be kept in their original containers with the original manufacturer's label. • Whenever possible, all of a product will be used up before disposing of the container. • Manufacture's recommendations for proper use and disposal will be followed. • Sediment shall be removed from sediment traps/sedimentation ponds before design capacity is reduced by 50%. • Accumulations of sediment (if escaping the site) shall be removed at a frequency to minimize further negative effects and prior to the next event(when feasible). • Pumped water shall be filtered if it is retained on site. 3.1.2 Preventative Maintenance • If equipment is fueled on site, fueling should be done in a way that would limit the chance of fuel spillage. • In the event a spill or release is detected, the Construction Manager shall be notified. • Frequent inspections of parked heavy equipment will be performed to identify and repair any leaks. • All drums, tanks, and other containers are to be properly sealed and clearly labeled to help prevent spills to the storm water and to expedite clean up procedures. 3.1.3 Prohibited Activities • No liquids are to be dumped onto pavements or discharge along with storm water. gravel areas of the site where they would • Sensitive areas of the site, if any, will be fenced and access to these areas will be limited to prevent intentional or accidental intrusions that may result in storm water contamination. In addition to the overall plan baseline BMPs outlined in the previous section, the following additional BMPs will be utilized. The BMP Map is located in Appendix 9. ...••........nncLUCATION 3.2 Sediment and Erosion Control 3.2.1 Interim Stabilization Practices The following interim stabilization practices will be utilized: Interim Practices Silt Fence Prior to site radin g g As noted on BMP map. Silt fence is normally and during all phases of construction. used as a perimeter control on the down slope side of disturbed areas and on side slopes where stormwater may runoff Organic Filter Tubes As necess the area. y As noted on BMP map Organic filter tubes, also known as wattles, trap and remove sediments in running water while not constraining the water Construction Prior to site radin flow Entrance/Staging area and during all phases of As noted on BMP map. Stabilized construction construction. exits are used to remove soil, mud and other matter from vehicles that drive off of a construction site onto public streets. Stabilized exits reduce the need to remove Inlet Protection Prior to site sediment from streets. of necessar . Fading To be determined by To keep sediment from y) and during all phases of the General Contractor entering the Storm construction. and inspector. Water system,these are used to reduce sediment in storm sewer systems by serving as a back-up system for areas that have newly applied erosion controls or for other sediment controls that cannot achieve ade uate sediment ""`capLu'tRELOCATION removal by themselves. Once final stabilization is achieved, all interim controls shall be removed. Accumulations of sediment(if escaping the site) shall be removed at a frequency minimize to mi further negative effects and prior to the next rain event(when feasible). 3.2.2 Permanent Stabilization Practices/Post Construction Con The followin trots g permanent stabilization practices and post construction controls will be utilized: Permanent 16111111111finalinnillin Practices Seeding, sodding As soon as possible or hydro mulch after the final grading Where soil has been To stabilize site and g g disturbed. •hase. control erosion. Maintained grassy At the beginning of the For those areas with To help filter runoff area project and during all grass prior to phases of construction. construction that are and reduce sediment discharges. not disturbed. Contractor shall seed all disturbed areas and provide temporary irrigation until ro vegetation achieves 100%coverage at 70%density to prevent erosion. g wh of 3.2.3 Temporary Stabilization Practices Stabilization measures must be initiated as soon as practicable, and in no case later after construction activity temporarily or permanently ceases in a portion of the site determined that construction activity will resume within 21 days after it than 14 days, which case temporary q , unless it is P ary stabilization measures are not required for that portion of the site. in Tem•or. Practices MraillimiiiraMilliammal Seeding, sodding or As soon as possible if it Disturbed areas hydro mulch is determined that To control erosion construction will stop for greater than 14 da s. Perimeter fencing As soon as possible if it Around the perimeter To secure around material storage is determined that area of the material storage storage area. material construction will stop area. for greater than 14 da s. •.....a.+-va.nlIVN 3.2.4 Other Controls Construction And Waste Materials Roadway Cleanup During all phases when All public roadways. To prevent sli sediment is deposited pPerY on public roadways as a road conditions and to result of construction keep sediment from activi leaving the site. Solid Waste During all phases. Collect trash to Management For sanitary, aesthetic specified points as and health reasons. Concrete Waste During shown on BMP ma.. Dung paving phase. At concrete cutting To control dust and Management locations. dispose of waste Dust Reduction During all phases. Where media. Measures earth is To control dust. Concrete Cuttin ri disturbed. g Dung construction For the concrete paving To reduce potential Materials and paving phase. portion of the project. contamination of storm water ru Paints, Stains, During all phases. Store in equipment the To reduceochances of Solvents and Sealants MSA area. Keep sealed contamination of storm when not in use. water runoff. 3.2.5 Off-Site Support Areas If there are off-site support areas such as soil borrow or spoil sites, equipment storage areas and/or an asphalt/concrete plant that are used in conjunction with this project, this information shall be added to this Storm Water Pollution Prevention Plan, showing the sediment and erosion control practices to be used. In addition,these areas shall be stabilized with permanent ground cover. The location of any off-site support areas will be added to the associated Site Maps in Attachment 6, if applicable. 3.3 Approved State, Tribal or Local Plans The S WPPP is consistent with the requirements of applicable sediment and erosion site plans or site permits (if any), or storm water management site plans or site permits (if any)approved federal, state, or local officials. The S WPPP will be updated to remain consistent with changes applicable to protecting surface water resources in such plans or permits(if any)for which written notice has been received. �,.nn"LUCATION Certain other environmental management plans may contain provisions for managing storm In some cases, it may be possible to build on elements of these plans that are relevant to the S WPPP. Examples of compatible environmental plans include the followin : g rm water. g Preparedness, Prevention and Contingency Plan Spill Prevention Control and Countermeasures Plan(SPCC)* OSHA Emergency Action Plan 404 Permit If any of these other plans are required,updated or developed for the Project,their rovisio be compatible with the requirements of this permit and this SWppp, The SWppp shoul d be updated to reflect these other plans if needed. p ns must •An SPCC is generally required if there are stored oil and oil products above ground at ca pacities g in excess of 1,320 gallons total. See the Federal Regulations for further criteria and guidelines. ^^,°nLINERELOCATION 4. Inspections, Spills & Record Keeping 4.1 Inspection and Maintenance Procedures Until the site is stabilized or until the Project is turned over to the City of Co ell i be done every 7 days. Pp inspections will The inspections will be conducted by a qualified employee of Barson Utilities, Inc. familiar with the project. Incidents of non-compliance should be indicated on this checklist. If no incidents whom is non-compliance are noted then the report must certify that the site is in compliance with th S WPPP and the permit. Periodic inspections are required to ensur e that all BMPs are working retained ncidents of correctly,do not need repair and that additional BMPs are not needed.All records shall be the for a period of three(3)years from the date the site is stabilized. Periodic inspections should be conducted to maintain the BMPs as described in the the site to be inspected include such things as: disturbed areas that have not been finally areas used for material storage that are exposed to precipitation, all interim-temporary-permanent Plan.Areas of stabilization practices, offsite support areas (if an �lY stabilized, m empor ( y), etc. If an inspection requires modification of an existing BMP, an additional BMP or better control pollutants in runoff,the modification should be recorded on the U pdate Form to this S WPPP in Attachment 6, no less than 7 days after the inspection. other changes to Maintenance, corrections or repairs to the structural controls must be completed anticipated storm event. If this is not possible, then it must be scheduled as soon as Controls that have been intentionally disabled,run-over, removed, or o P enprior e the next ineffective must be replaced or corrected immediately upon discovery. practicable. otherwise rendered "'.KLINERELOCATION 4.2 Spills and Releases A spill is any incident in which oil,hazardous substances, industrial waste, or"other contaminate or may contaminate surface water or ground water in the state of Texas. T following steps must be taken if spills or releases occur of reportable substances" TNRCC/TCEQ regulations. The quantities as defined under 1. Notify the City of Coppell Fire Department(911). Local city officials should also be notified. Notify the National Response Center(800.424.8802), if required b applicable law, and the Construction Manager as soon as you have knowledge of t spill. The TCEQ should also be notified, if required, within 24 hours, at 1.800.832.8224 as required by applicable law. knowledge the 2. Take corrective actions as appropriate to contain and clean-up the spill and contamination of the site. These actions may include the following as appropriate: minimize g • Assess the Immediately determine the character, exact source, and amount of any released materials. Response personnel will determine the for notification of authorities and regulatory agencies and make a need determination regarding steps required to safeguard personnel(i.e.,evacuation, personal protection, etc.). • Stoo the flow at the source-After all required safety-related measures have been implemented, and if the potential for a further release still exists, then steps will be implemented to prevent further releases to the extent possible b cutting off the flow at the source. This may simply require the shutting of a valve or the righting of a drum. In some instances, more extensive repairs by be necessary in which case outside contractors may be contacted to stop thy flow. p • Snill containment.Immediately after determination of what safety and containment equipment are required, then containment procedures will be implemented. Containment points include those perimeter outfalls precautions affected by the spill. In addition, ails that may be material may be place around storm drains booms,o prevents ntainantbsfirom entering storm sewers. m • Snill cleanu .To the extent practicable, spilled material should be retrieved and stored in leak-proof containers until proper disposal may be accomplished. Cleanup equipment includes pads, booms, and absorbent material. Contaminated equipment should be properly decontaminated or properly disposed. Depending upon the nature and extent of the release, the following procedures will be utilized: Whenever possible, dry will be utilized. D clean-up methods, such as sweeping and absorbents When dry clean-up methods are not practicable or when the spilled substance -•••-a-..an121WATERLINE RELOCATION is a liquid, booms will be used to prevent the release of the substance storm sewer system. If appropriate, liquids generated by spills and clean-up activities to the the sanitary sewer system. If the substance is inappropriate will divert to ni sewer system, a contractor will be employed to remov the substance. • Dispose of contaminated material.Contaminated material shall be disposed in accordance with all federal, state, and local regulations. Exact me ans of disposal will depend upon the nature& volume of the con of • Records ill event information.Ensure that a record spill event is made contaminated material. of the as soon as practicable after the event in order to recall as much detail as possible. The record should include the location of the spill, spill time, d weather conditions,and duration of the incident. Also,a description of the and amount of material spilled and recovered, a brief description of date, of the spill and any type description of response procedures will be kept. In a the cause description ti no fre response s procedures measures that parties, an oval and a addition, an evaluation a repeat of the incident. Forms for completing the spill report are included in t Appendix E. • Replace used spill equipment-Following each spill event,the invento ry of spill response equipment will be assessed and restocked as necessary. 3. The S Wppp must be updated within the 7 days to provide a description the circumstances leading to the release, the date of release and the corrective taken. The plan also will be revised to reflect any changes in facility of the release, ca ion o operating procedures resulting from the evaluation of the incident modifications or 4.3 Recording Keeping All changes or modifications to the S Wppp, records of any inspection, correspondence should be kept with the S Wppp. All completed reports, inspection monitoring data, S Wppp , or other related , Construction Site Notice and other records shall be kept for at least three monitoring years after da the project is completed. wrPELLSH 121 WATER LINE RELOCATION 5. References Texas Commission on Environmental provisions of the Section o the Clean Quality, General Pe Code Construction sites located t in the state of t Texas. Permit to Discharge Waste under Water Act and Chapter 26 of the Texas Water North Central Texas Co TPDES General Permit NO. TXR150000. Construction. Council of Government, December 2003. IS W M Design Manual for Environmental Protection Agency, PDES General Permit for Storm Water Discharges from Activities, Modifi January 21, 2005. Attachment 1 SWPPP & Signature Page Certification TCEQ TPDES General Permit No. TXR150000 Certifications Owner/Operator Approval and Certification of SWPPP Project Name: CITY OF COPPELL SH 121 WATER LINE RELOCATION Certification of: Storm Water Pollution Prevention Plan Certification of: Endangered Species Act compliance Certification of: National Historical Act compliance "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." '15-1RD(41, Al __A )4/A 20_ Name Titl Da e General Contractor M i of12111q Name / Title Date Own-r Attachment 2 Notice of Intent (NOI) Notice of Termination (NOT) As stated in the TXR150000 documentation, because this project is linear in nature, it is expected to disturb LESS than 5 acres, neither a "Notice of Intent" nor a "Notice of Termination" is required. MEADE SERVICING GROUP JANUARY 13, 2014 RE: CITY OF COPPELL SH 121 WATER LINE RELOCATION To Whom It May Concern: Because this project is of a linear nature, it is estimated that less than 5 acres will be disturbed. There is no requirement from the TCEQ for a Notice of Intent (NOI) or Notice of Termination (NOT). The only requirement is a current Construction Site Notice (CSN) to be posted in plain sight near the entrance to the site and included in the SWPPP Report Book. Thank you. Jim Meade Meade Servicing Group Attachment 3 Construction Site Notice IIMIIIIINIF -I - - i 7 SMALL CONSTRUCTION SITE NOTICE FOR THE Texas Commission on Environmental Quality(TCEQ) Storm Water Program TPDES GENERAL PERMIT TXR150000 The following information is posted in compliance with Part II.E.2. of the TCEQ General Permit Number TXR150000 for discharges of storm water runoff from small construction sites. Additional information regarding the TCEQ storm water permit program may be found on the internet at: http://www.tceq.state.tx.us/nav/permits/wa construction.html Operator Name: BARSON UTILITIES, INC. Contact Name and Phone Number: MICHAEL MILLIGAN - 214-532-0151 CITY OF COPPELL SH 121 WATER LINE RELOCATION Project Description: Physical address or FROM SANDY LAKE ROAD TO N COPPELL ROAD description of the site's location, estimated start date and projected end date, or date that disturbed EST. START: 1/20/2014 soils will be stabilized EST. END: 7/20/2014 Location of Storm Water Pollution Prevention Plan: BARSON UTILITIES, INC. BUSINESS OFFICE For Small Construction Activities Authorized Under Part II.E.2. (Obtaining Authorization to Discharge) the following certification must be completed: I ("' ( ( (c(t c .A,k" (Typed or Printed Name Person Completing This Certification)certify under penalty f law that I have read and untkrstand the eligibility requirements for claiming an authorization under Part II.E.2.of TPDES General Permit TXR150000 and agree to comply with the terms of this permit. A storm water pollution prevention plan has been developed and will be implemented prior to construction, according to permit requirements. A copy of this signed notice is supplied to the operator of the MS4 if discharges enter an MS4. I am aware there are significant penalties for providing false information or for conducting unauthorized discharges,including the possibility of fine and imprisonment for knowing violations. / Signature and Titl-104.j� 1 Ak Date D 1 ` ■ I Date Notice Removed MS4 operator notified per Part II.F.3. Attachment 4 Delegation Letters Mail originals to: Executive Director TCEQ Storm Water And General Permits Team; MC-228 P. 0. Box 13087 Austin, TX 78711-3087 Place sinned copies of these letters in this section CITY OF COPPELL 255 PARKWAY BOULEVARD COPPELL, TEXAS 75019 "Executive Director" TCEQ Storm Water And General Permits Team; MC-228 P. O. Box 13087 Austin, TX 78711-3087 Dear Executive Director; This letter serves to designate either a person or company as authorized for signing reports, documents, certifications or other information as required to implement the Storm Water Pollution Prevention Plan. The following company is hereby authorized to sign reports, documents or certificates. BARSON UTILITIES,INC. This letter is in reference to: CITY OF COPPELL SH 121 WATER LINE RELOCATION By signing this authorization, I confirm that I meet the following requirements to make such a designation as set forth in the Texas Administration Code Title 30 Part 1 Chapter 305 Subchapter 305.44 and Title 30 Part 1 Chapter 305 Subchapter Rule 305.128 "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." qji Title ate BARSON UTILITIES, INC. 5326 W LEDBETTER DRIVE DALLAS, TEXAS 75236 "Executive Director" TCEQ Storm Water And General Permits Team; MC-228 P. O. Box 13087 Austin, TX 78711-3087 Dear Executive Director; This letter serves to designate either a person or company as authorized for signing reports, documents, certifications or other information as required to implement the Storm Water Pollution Prevention Plan. The following company is hereby authorized to sign reports, documents or certificates. BARSON UTILITIES,INC. This letter is in reference to: CITY OF COPPELL SH 121 WATER LINE RELOCATION By signing this authorization, I confirm that I meet the following requirements to make such a designation as set forth in the Texas Administration Code Title 30 Part 1 Chapter 305 Subchapter 305.44 and Title 30 Part 1 Chapter 305 Subchapter Rule 305.128 "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Y.)/ , / (gye--A1 ,■, d , _ a / Fame Title 4 Attachment 5 Inspections SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I cert under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection:_ Time of Inspection:_ Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. 1 am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Title Date SWPPP Construction Inspection Checklist This SWPPP Inspection if for: CITY OF COPPELL SH 121 WATER LINE RELOCATION Date of Inspection: Time of Inspection: Are the following items in Circle Note date of correction and Compliance with the SWPPP? Yes or No action taken if necessary Is there a copy of the permit with the SWPPP? Yes or No Is a TPDES Construction Site Notice posted at the entrance to Yes or No the site? Is the inspector qualified? Yes or No Do disturbed and/or storage areas show signs of erosion? Yes or No At the outfall(s),are there signs of erosion? Yes or No Are the BMPs working properly? Yes or No Do BMPs need maintenance? (If so,note location below) Yes or No Was there a major Rain Event? Number of Inches Yes or No Are any new BMPs needed? (If so,note location below) Yes or No Was entire site inspected? Yes or No If correction action is needed,it should be completed within 7 days and the corrective action should be described on the next inspection report.Also,the SWPPP should be updated to reflect and changes to BMPs, any additional BMPs or any new controls within 7 days of any such change. Notes: "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility offine and imprisonment for knowing violations." Name Title Date Attachment 6 SWPPP Amendments Major Grading Activities BMP Installation Schedule SWPPP Amendment Form CITY OF COPPELL SH 121 WATER LINE RELOCATION Change to BMP's Map Date Updated Explanation Signature (List) Updated "I certify under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility offine and imprisonment for knowing violations." Name Date SWPPP Amendment Form CITY OF COPPELL SH 121 WATER LINE RELOCATION Change to BMP's Map Date Updated Explanation Signature (List) Updated "I certifii under a penalty of law that this Storm Water Pollution Prevention Plan and all attachments were prepared under my direction or supervision in accordance with a system designed to ensure that qualified personnel properly gather and evaluate the information submitted. Based on my inquiry of the person or persons who manage the system or those persons directly responsible for gathering the information, to the best of my knowledge and belief the information submitted is true, accurate, and complete. I am aware that there are significant penalties for submitting false information, including the possibility of fine and imprisonment for knowing violations." Name Date v go es to li A y • E rAC,ll ■0) CA V1 = y 0 Cd m, A at "0 `V W 'o I* a g w es 'V A z A V] it o at 74 7 y u 6> • Q to V• A C i„ IN) W a o O a o `C I.`• y ,w C A v '— L o GC ea • to at to TS o 0 to a o 0 0. u C w v L i O . C C *z C 4+y C yd .-d .fl O 0,-0 44 0 G Y W C y a L C 0 es r"F U py CO N 6y� •Vi �31 i+ y L • W C 17 .s u ... O Tr - O G w w g; C 4 w+ a - C.) W4 CA a a � - z Attachment 7 Contractor Certification CONTRACTOR CERTIFICATION—DAY TO DAY CONTROL Project name: CITY OF COPPELL SH 121 WATER LINE RELOCATION The following duly authorized representative(s)has been appointed by the Primary Contractor and shall be responsible for day to day operations at the site. I certify under penalty of law that I understand the terms and conditions of the General Permit No. TXR1 50000 that authorizes the storm water discharges associated with commercial activity from construction site identifies as part of this certification. Primary Operator: BARSON UTILITIES,INC. Signed: Date Name: Oil Title: Attachment 8 BMP Specifications Selected for Project iSWMTM Technical Manual Construction Controls 1 .0 Overview of Construction Controls 1.1 Introduction In order to address the requirements of pollution reduction at construction sites, a variety of controls should be employed to reduce soil erosion, reduce sediment loss from the site, and manage construction- generated waste and construction related toxic materials. Controls consist of both temporary and permanent methods to reduce pollution from a construction site. The majority of controls address loss of soil from the site. Soil loss in the form of erosion and sediment due to storm events and wind constitute the majority of pollution generated from construction sites. Controls that address erosion and sediment are typically more site specific than waste and toxics management. Erosion and sediment controls are dependent on site slopes, drainage patterns and drainage quantities along with other site-specific conditions. Materials and waste management consists primarily of "good housekeeping" practices which are dependent on the type of construction and the quantity and type of building materials. 1.2 Control Selection Guide The designer preparing the iSWM Construction Plan can first use the control selection guide on the following pages to determine the controls that are most appropriate for the site. Chapters 2.0, 3.0 and 4.0 contain the descriptions, design requirements, maintenance requirements, and limitations of the controls. These provide the tools for the designer to select the appropriate controls and properly locate them on the site to effectively reduce erosion and sediment loss. The Efficiency Ratings listed for the controls are the range of average efficiencies in reducing erosion or trapping sediment for the control, assuming the controls are properly designed, installed, and maintained for the flow and volumes from the design storm. The removal efficiency varies within in the range based on soil type. The Efficiency Ratings are useful in comparing the effectiveness of the controls. The ratings are also used in calculating the Site Rating, which is used by some municipalities to ensure adequate design of erosion and sediment controls. Refer to Section 1.3 Site Rating Calculations for additional details concerning the Efficiency Ratings and the methodology for calculating the Site Rating. The following legend applies to the Targeted Pollutants and Implementation Considerations presented for each of the controls: Legend • Significant Impact • Medium Impact o Low Impact ? Unknown or Questionable Impact Overview CC-1 Revised 04/10 iSWMTM Technical Manual Construction Controls 1.2.1 Erosion Controls These controls are the measures and techniques used to retain soil in place. They are installed on the perimeter of the site to limit flow across disturbed areas and within the site to provide protective covering of disturbed areas that are not actively being worked. Erosion controls reduce the amount of soil removed and transported by stormwater runoff and reduce the need for sediment controls. Table 1.1 Erosion Controls Control Primary Purpose Effidency Rating(Fe) Slow flow to prevent erosion of swales and 0.30-0.50 Check Dam drainage ditches while also providing minor (Depends on soil type) detention and sediment removal Diversion Dike Route flows around slopes and disturbed 0.95 areas Protect disturbed soil and slopes from erosion 0.90 (Ground cover) Erosion Control using a degradable, rolled erosion control 0.65 (Perimeter w/o Blankets product; also provides limited protection as a vegetation) perimeter control Interceptor Swale Route flows around slopes and disturbed 0.95 areas Protect disturbed soil with a layer of straw, 0.75-0.90 Mulching wood chips, compost or other organic (Depends on coverage) material Route overland flow on a slope into a pipe to Pipe Slope Drain 0.95 protect the slope Protect disturbed soil from wind erosion (dust 0.10-0.90 Soil Surface control)while also providing some protection (Depends on type of Treatments from water erosion, depending on the treatment method treatment) Turf Reinforcement Protect disturbed soil on steep slopes and in Mats channels from erosion using a non- 0.90 degradable, rolled erosion control product Prevent erosion by providing a natural cover 0.90 (When through hydro-mulching, seeding or sod fully established; placement lower r while vegetation nd is first growing) Velocity Dissipation Protect soil from erosion at points where N/A Devices concentrated flows are discharged The Efficiency Ratings listed for the erosion controls are the assumed average efficiencies in reducing erosion, based on the controls being designed for the flow and volume from the temporary control design storm and installed in accordance with the criteria in this manual. 1.2.2 Sediment Controls These controls are temporary structures or devices that capture soil transported by stormwater through sedimentation, filtration or chemical treatment of the runoff. They are used to trap sediment before it leaves the construction site. The effectiveness of controls that form a barrier or filter for trapping soil is highly dependent on the size of soil particles. The efficiencies presented are ranges based on soil types. The removal efficiency will be at the high end of the range for sand and coarse silt or loam and at the low end for fine silt or loam and clay. Controls with a single number for the efficiency rating do not vary in performance based on soil type. Overview CC-2 Revised 04/10 ISWMTM Technical Manual Construction Controls Table 1.2 Sediment Controls Control Primary Purpose Efftdency Rating(Fe) Active Treatment Remove pollutants and suspended soil, including fine clay particles,through filtration 0.99 System and/or chemical-aided flocculation Depressed Grade Detain and settle suspended soil from small 0.50-0.75 Sediment Trap areas within rights-of-way Dewatering Controls Remove suspended soil from water that is 0.50-0.75 pumped out of low points onsite Intercept sediment at curb and area inlets as Inlet Protection a secondary defense in sequence with other 0.35-0.65 controls Organic Filter Berm Slow and filter runoff to retain sediment 0.50-0.75 Organic Filter Tubes Slow and filter runoff to retain sediment 0.50-0.75 Passive Treatment Improve performance of other controls by 0.85 System adding flocculation agents to stormwater Detain stormwater for sedimentation and Pipe Inlet Protection filtration before it enters a closed conveyance 0.50-0.75 /I system l Detain stormwater in a pond with a controlled 0.50-0.90 Sediment Basin outflow to allow for sedimentation Silt Fence Slow and filter runoff to retain sediment 0.50-0.75 Stabilized Reduce offsite sediment tracking from trucks N/A Construction Exit and construction equipment Stone Outlet Sediment Intercept and filter small, concentrated flows 0.50-0.85 Trap in swales and other defined waterways Triangular Sediment Slow and filter runoff to retain sediment 0.50-0.75 Filter Dike Turbidity Barrier Detain and settle suspended soil where work 0.50-0.90 is occurring in or adjacent to a water body 0.35—0.85 Vegetated Filter Strips Slow sheet flow from small areas to allow for (Depends on many and Buffers sedimentation conditions in addition to soil type) Wheel Cleaning Reduce offsite sediment tracking from trucks N/A Systems and construction equipment The Efficiency Ratings listed for the sediment controls are the assumed average efficiencies in capturing sediment for a range of soil types, based on the controls being designed for the flow and volume from the temporary control design storm and installed in accordance with the criteria in this manual. Overview CC-3 Revised 04/10 ISWMTI"Technical Manual Construction Controls 1.2.3 Material and Waste Controls Material and waste control techniques are applicable on the majority of construction projects due to their general purpose of reducing the discharge of pollutants from construction activities. They form the basis of good housekeeping procedures that should be followed during construction and in many cases are mandated by stormwater discharge permits. The techniques are essential to preventing the discharge of pollutants other than sediment from a construction site. A numeric efficiency rating is not provided for material and waste controls, since the controls are not for erosion and sediment and are not a factor in the Site Rating calculation. All of these techniques are highly effective in minimizing discharges of the targeted pollutants when properly applied. Table 1.3 Material and Waste Controls Control Primary Purpose Techniques to minimize the exposure of paints, solvents,fertilizer, Chemical Management pesticides, herbicides, and other chemicals to precipitation and stormwater; and techniques for managing the wastewater from washout of paint, form release oils, curing compounds, and other construction chemicals Concrete Sawcutting Techniques for collection and disposal of the slurry of cutting water and Waste Management concrete cuttings that results from concrete sawing Concrete Waste Techniques for disposal of concrete washout, demolished concrete, etc. Management Debris and Trash Techniques for storage and disposal of packaging, scrap building materials, Management personal trash, and other wastes generated by construction activities and personnel Hyper-Chlorinated Techniques to prevent water with high concentrations of chlorine from Water Management being discharged Sandblasting Waste Techniques for disposal of sandblasting waste and containment of wastes Management during operations Sanitary Waste Techniques to control and prevent the exposure of sanitary waste to Management precipitation and stormwater Spill and Leak Techniques to minimize the discharge of pollutants from spills and leaks Response Procedures Subgrade Stabilization Techniques to control runoff from soil being chemically stabilized in Management preparation for construction Vehicle and Techniques to prevent discharges of fluids used in vehicle and equipment Equipment operation and maintenance and the discharge of wash waters that contain Management soaps or solvents Overview CC-4 Revised 04/10 ISWMTM Technical Manual Construction Controls 2.0 Erosion Controls 2.1 Check Dam Erosion Control ` Description: Check dams are small barriers consisting of loose rock, rock bags, or organic filter tubes placed Spacing across a drainage swale or ditch. 9"-36• They reduce the velocity of small ' - concentrated flows, provide a limited barrier for sediment and reduce the potential for erosion of the swale or ditch. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Heights between 9 inches and 36 inches • Top of the downstream dam should be at the same Slope Protection elevation as the toe of the upstream dam Sediment Barrier Channel Protection ADVANTAGES/BENEFITS: •{/ Reduced velocities in long drainage swales or ditches Temporary Stabilization • May be used with other channel protection measures Final Stabilization • Provides some sediment removal Waste Management DISADVANTAGES/LIMITATIONS: Housekeeping Practices • Cannot be used in live stream channels • Minor ponding upstream of the check dams Fe=0.30-0.50 • Extensive maintenance or replacement of the dams (Depends on soil type) required after heavy flows or high velocity flows • Mowing hazard from loose rocks if all rock is not removed IMPLEMENTATION at end of construction CONSIDERATIONS MAINTENANCE REQUIREMENTS: C Capital Costs • Inspect regularly • Maintenance • Remove silt when it reaches approximately 'A the height of the dam or 12 inches,whichever is less 0 Training Q Suitability for Slopes>5% "• TARGETED POLLUTANTS Other Considerations: Q Sediment • None o Nutrients&Toxic Materials O Oil&Grease Q Floatable Materials O Other Construction Wastes Check Dam CC-12 Revised 04/10 iSWMTM Technical Manual Construction Controls 2.1. 1 Primary Use Check dams are used in long drainage swales or ditches to reduce erosive velocities. They are typically used in conjunction with other channel protection techniques such as vegetation lining and turf reinforcement mats. Check dams provide limited treatment to sediment-laden flows. They are more useful in reducing flow velocities to acceptable levels for stabilization methods. Check dams may be used in combination with stone outlet sediment traps, where the check dams prevent erosion of the swale while the sediment trap captures sediment at the downstream end of the swale. 2.1.2 Applications Check dams are typically used in swales and drainage ditches along linear projects such as roadways. They can also be used in short swales down a steep slope, such as swales down a highway embankment,to reduce velocities. Check dams shall not be used in live stream channels. Check dams should be installed before the contributing drainage area is disturbed, so as to mitigate the effects on the swale from the increase in runoff. If the swale itself is graded as part of the construction activities, check dams are installed immediately upon completion of grading to control velocities in the swale until stabilization is completed. 2.1.3 Design Criteria General Criteria • Typically, the dam height should be between 9 inches and 36 inches, depending on the material of which they are made. The height of the check dam shall always be less than one-third the depth of the channel. it • Dams should be spaced such that the top of the downstream dam is at the same elevation as the toe of the upstream dam. On channel grades flatter than 0.4 percent, check dams should be placed at a distance that allows small pools to form between each check dam. • The top of the side of the check dam shall be a minimum of 12 inches higher than the middle of the dam. In addition, the side of the dams shall be embedded a minimum of 18 inches into the side of the drainage ditch, swale or channel to minimize the potential for flows to erode around the side of the dam. • Larger flows (greater than 2-year, 24-hour design storm) must pass the check dam without causing excessive upstream flooding. • Check dams should be used in conjunction with other sediment reduction techniques prior to releasing flow offsite. • Use geotextile filter fabric under check dams of 12 inches in height or greater. The fabric shall meet the following minimum criteria: o Tensile Strength, ASTM D4632 Test Method for Grab Breaking Load and Elongation of Geotextiles, 250-lbs. o Puncture Rating, ASTM D4833 Test Method for Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products, 135-lbs. o Mullen Burst Rating, ASTM D3786 Standard Test Method for Hydraulic Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method,420-psi. o Apparent Opening Size, ASTM D4751 Test Method for Determining Apparent Opening Size of a Geotextile, U.S. Sieve No. 20(max). • Loose, unconfined soil, wood chips, compost, and other material that can float or be transported by runoff shall not be used to construct check dams. Check Dam CC-13 Revised 04/10 iSWMTM Technical Manual Construction Controls Rock Check Dams • Stone shall be well graded with stone size ranging from 3 to 6 inches in diameter for a check dam height of 24 inches or less. The stone size range for check dams greater than 24 inches is 4 to 8 inches in diameter. • Rock check dams shall have a minimum top width of 2 feet with side slopes of 2:1 or flatter. Rock Bag Check Dams • Rock bag check dams should have a minimum top width of 16 inches. • Bag length shall be 24 inches to 30 inches, width shall be 16 inches to 18 inches and thickness shall be 6 inches to 8 inches and having a minimum weight of 40 pounds. • Minimum rock bag dam height of 12 inches would consist of one row of bags stacked on top of two rows of bag. The dam shall always be one more row wide than it is high, stacked pyramid fashion. • Bags should be filled with pea gravel, filter stone, or aggregate that is clean and free of deleterious material. • Sand bags shall not be used for check dams, due to their propensity to break and release sand that is transported by the concentrated flow in the drainage swale or ditch. • Bag material shall be polypropylene, polyethylene, polyamide or cotton burlap woven fabric, minimum unit weight 4-ounces-per-square-yard, Mullen burst strength exceeding 300-psi as determined by ASTM D3786, Standard Test Method for Hydraulic Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method, and ultraviolet stability exceeding 70 percent. • PVC pipes may be installed through the dam to allow for controlled flow through the dam. Pipe should be schedule 40 or heavier polyvinyl chloride (PVC) having a nominal internal diameter of 2 inches. Sack Gabion Check Dams • Sack gabion check dams may be used in channels with a contributing drainage area of 5 acres or less. • Sack gabions shall be wrapped in galvanized steel, woven wire mesh. The wire shall be 20 gauge with 1 inch diameter, hexagonal openings. • Wire mesh shall be one piece, wrapped around the rock, and secured to itself on the downstream side using wire ties or hog rings. • Sack gabions shall be staked with' inch rebar at a maximum spacing of three feet. Each wire sack shall have a minimum of two stakes. • Stone shall be well graded with a minimum size range from 3 to 6 inches in diameter. Organic Filter Tube Check Dams • Organic filter tubes may be used as check dams in channels with a contributing drainage area of 5 acres or less. • Organic filter tubes shall be a minimum of 12 inches in diameter. • Filter material used within tubes to construct check dams shall be limited to coir, straw, aspen fiber and other organic material with high cellulose content. The material should be slow to decay or leach nutrients in standing water. • Staking of filter tubes shall be at a maximum of 4 foot spacing and shall alternate through the tube and on the downstream face of the tube. • Unless superseded by requirements in this section, filter tubes and filter material shall comply with the Check Dam CC-14 Revised 04/10 iSWMTM Technical Manual Construction Controls criteria in Section 3.6 Organic Filter Tubes. 2.1.4 Design Guidance and Specifications Specifications for construction of this item may be found in the Standard Specifications for Public Works Construction — North Central Texas Council of Governments, Section 201.9 Check Dam (Rock). Specifications are also available in the Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges (TxDOT 2004), Item 506.2.A and Item 506.4.C.1. 2.1.5 Inspection and Maintenance Requirements Check dams should be inspected regularly (at least as often as required by the TPDES Construction General Permit). Silt must be removed when it reaches approximately 1/3 the height of the dam or 12 inches, whichever is less. Inspectors should monitor the edges of the dam where it meets the sides of the drainage ditch, swale or channel for evidence of erosion due to bypass or high flows. Eroded areas shall be repaired. If erosion continues to be a problem, modifications to the check dam or additional controls are needed. Care must be used when taking out rock check dams in order to remove as much rock as possible. Loose rock can create an extreme hazard during mowing operations once the area has been stabilized. 2.1.6 Example Schematics The following schematics are example applications of the construction control. They are intended to assist in understanding the control's design and function. The schematics are not for construction. They may serve as a starting point for creating a construction detail, but they must be adapted for the site by the designer. Dimensions and notes appropriate for the application must also be added by the designer. Check Dam CC-15 Revised 04/10 iSWMTM Technical Manual Construction Controls 1.5' / Q // // - •.Y 1 -.• I....n� —' 9"-36 \/ /`\\\/- R I R 1-�kR i?1 R i R••i R I R I R R R R \ FILTER FABRIC ROCK CHECK DAM VIEW LOOKING UPSTREAM N.T.S. r" 1 I 17 FLOW p -� 9" " 1 MAX(BOTH SIDES) <\/\\' \ . ..• FILTER FABRIC 8' �\ CROSS SECTION OF ROCK CHECK DAM N.T.S. L TOE OF CHECK DAM TOP OF CHECK DAM \'/\\ / A\>-. \" SAME ELEVATION \//\\// /\\//ii \,/ SPACING BETWEEN ROCK CHECK DAMS, N.T.S. NOTES: ACTUAL DIMENSIONS OF THE CHECK DAMS SHALL BE DESIGNED BASED ON FLOW CONDITIONS IN THE DRAINAGE SWALE OR DITCH. PROVIDE CALCULATIONS THAT DOCUMENT THE FOLLOWING PARAMETERS USED TO DESIGN THE CHECK DAMS. •HEIGHT OF CHECK DAMS BASED ON SWALE OR DITCH DIMENSIONS AND FLOW CONDITIONS. •SPACING OF CHECK DAMS BASED ON GRADE OF THE SWALE OR DITCH. TOP OF DOWNSTREAM DAM SHALL BE AT SAME ELEVATION AS TOE OF UPSTREAM DAM Figure 2.1 Schematics of Rock Check Dams (Source:Modified from Stormwater Management Manual for Western Washington) Check Dam CC-16 Revised 04/10 ISWMTA4 Technical Manual Construction Controls SAND BAG OR GRAVEL BAG 1.5' 9" " fir ✓,i //''' FILTER FABRIC 2"DIA PVC ON 4 FT SPACING (MIN OF 2) ROCK BAG CHECK DAM VIEW LOOKING UPSTREAM N.T.S. 2"DIA PVC ON 1� MIN 4 FT SPACING (MIN OF 2) FLOw 1 9"-38" v r y` ; // \\///�T/� is 1 <,/<7 i\/ ( k\ FILTER FABRIC \/\\j/v�.�/;y. / 8' i CROSS SECTION OF ROCK BAG CHECK DAM - N.T.S. L TOE OF CHE Watt DAMS TOP OF CHECK DAM SAME >\ ELEVATION /v// /f�r\/yf v\/ \/' 2/f/\ "'/// /_ SPACING BETWEEN ROCK BAG CHECK DAMS N.T.S. NOTES: ACTUAL DIMENSIONS OF THE CHECK DAMS SHALL BE DESIGNED BASED ON FLOW CONDITIONS IN THE DRAINAGE SWALE OR DITCH. PROVIDE CALCULATIONS THAT DOCUMENT THE FOLLOWING PARAMETERS USED TO DESIGN THE CHECK DAMS. •HEIGHT OF CHECK DAMS BASED ON SWALE OR DITCH DIMENSIONS AND FLOW CONDITIONS. •SPACING OF CHECK DAMS BASED ON GRADE OF THE SWALE OR DITCH. TOP OF DOWNSTREAM DAM SHALL BE AT SAME ELEVATION AS TOE OF UPSTREAM DAM. Figure 2.2 Schematics of Rock Bag Check Dams Check Dam CC-17 Revised 04/10 iSWMTM Technical Manual Construction Controls SACK GABIONS 11111 SACK GABION CHECK DAM PLAN VIEW N.T.8. 314•DIA REBAR 3'MAX STAKES SPACING B POINT B MIN.6• 4%r\/\ �_ ' ABOVE POINT A SACK GABION CHECK DAM VIEW LOOKING UPSTREAM N.T.S. t 4' { ��i rwsc ��r sir •w w w �� • • ;ry V140*/ • • • • • 0 .�'O wwww4 AI%I &�ja 4' lem Am AL t GALVANIZED STEEL WIRE MESH TYPICAL SACK GABION N.T.S. NOTES: ACTUAL DIMENSIONS OF THE CHECK DAMS SHALL BE DESIGNED BASED ON FLOW CONDITIONS IN THE DRAINAGE SWALE OR DITCH. PROVIDE CALCULATIONS THAT DOCUMENT THE FOLLOWING PARAMETERS USED TO DESIGN THE CHECK DAMS. •HEIGHT OF CHECK DAMS BASED ON SWALE OR DITCH DIMENSIONS AND FLOW CONDITIONS. •SPACING OF CHECK DAMS BASED ON GRADE OF THE SWALE OR DITCH. TOP OF DOWNSTREAM DAM SHALL BE AT SAME ELEVATION AS TOE OF UPSTREAM DAM. Figure 2.3 Schematics of Sack Gabion Check Dams (Source:Modified from Texas Department of Transportation Detail Sheet EC(2)-93) Check Dam CC-18 Revised 04/10 iSWMTM Technical Manual Construction Controls 2"x 2"WOOD FILTER TUBE DOWNSTREAM SIDE STAKES WO(4' (12"MIN OF FILTER TUBE SPACING DIAMETER) THROUGH FILTER 4,4Sti TUBE , \\ \ v/ ..//7/\ /\\/ /%/%; rim ORGANIC FILTER TUBE CHECK DAM VIEW LOOKING UPSTREAM N.T.S. L --- TOE OF ORGANIC FILTER TUBE FLOW CHECK (12"MIN DIA.) DAM TOP OF CHECK �� DAM l SEE EMBEDMENT 411110111 - • DETAIL ORGANIC FILTER TUBE CHECK DAM PROFILE N.T.S. 2"x 2"WOOD STAKES THROUGH TUBE (EXTEND 2'MAX ABOVE TOP OF TUBE) MAX 4'SPACING FOR ALL STAKES ORGANIC FILTER TUBE (12'MIN DIA) 2"x2"WOOD STAKES DOWNSTREAM OF TUBE CALCULATIONS IGN C SI . EMBEDMENT MINIMUM i>Y /// 12"MINIMUM EMBEDMENT DETAIL FOR ORGANIC FILTER TUBE CHECK DAM N.T.S. NOTES: ACTUAL DIMENSIONS OF THE CHECK DAMS SHALL BE DESIGNED BASED ON FLOW CONDITIONS IN THE DRAINAGE SWALE OR DITCH. PROVIDE CALCULATIONS THAT DOCUMENT THE FOLLOWING PARAMETERS USED TO DESIGN THE CHECK DAMS. 'HEIGHT OF CHECK DAMS BASED ON SWALE OR DITCH DIMENSIONS AND FLOW CONDITIONS. •SPACING OF CHECK DAMS BASED ON GRADE OF THE SWALE OR DITCH. TOP OF DOWNSTREAM DAM SHALL BE AT SAME ELEVATION AS TOE OF UPSTREAM DAM. Figure 2.4 Schematics of Organic Filter Tube Check Dams (Source:Modified from City of Plano BMP S-7) Check Dam CC-19 Revised 04/10 iSWMTM Technical Manual Construction Controls 2.9 Vegetation Erosion Control F/„� Description: Vegetation, used as an �� erosion control, is the sowing or sodding of grasses, small grains, or legumes to provide temporary and IT¶TIT-17-TT TIT IT It TT T + Tr 1T n IT IT IT TT T TT 7 T< R 1 rT T`Tr r1-, final vegetative stabilization for + n"-" disturbed areas. T J-T T T.T T-T 7 T TAT I T T�TT,T TRTRT�T�TR T�T�T�I�i�.�`11_ :T KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Specify preparation of the soil surface before seeding or sodding Slope Protection • Minimum of 4 to 6 inches of top soil required, Sediment Barrier depending on subsurface conditions Channel Protection. • Specify soil amendments depending on soil conditions • Select seed or sod species appropriate for the climate, Temporary Stabilization season, and soil Final Stabilization ADVANTAGES/BENEFITS: Waste Management • More effective and easier to maintain than sediment Housekeeping Practices controls during a long construction period • May be used for temporary or final stabilization Fe=0.90 When fully established;DISADVANTAGES/LIMITATIONS ( hed;lower • Not appropriate for areas with heavy pedestrian, while vegetation is first growing)` vehicular traffic, or concentrated, high velocity flow • May require days to weeks for adequate establishment IMPLEMENTATION CONSIDERATIONS • Alternate erosion control is needed until vegetation is established G Capital Costs Maintenance MAINTENANCE REQUIREMENTS: • Inspect regularly O Training • Protect newly seeded areas from excessive runoff, high G Suitability for Slopes>5 velocity flow, and traffic until vegetation is established • Water and fertilize until vegetation is established Other Considerations: • Reseed and/or provide mulch or another control for • Design is unique to soil and bare spots • Rake accumulations of sediment from the vegetation other conditions at each site • Watering and other required until TARGETED POLLUTANTS vegetation is established • Sediment G Nutrients&Toxic Materials o Oil&Grease O Floatable Materials o Other Construction Wastes Vegetation CC-53 Revised 04/10 iSWMTM Technical Manual Construction Controls 2.9.1 Primary Use Vegetation is used as a temporary or final stabilization measure for areas disturbed by construction. As a temporary control, vegetation is used to stabilize stockpiles, earthen dikes, and barren areas that are inactive for longer than two weeks. As a final control at the end of construction, grasses and other vegetation provide good protection from erosion along with some filtering for overland runoff. Subjected to acceptable runoff velocities, vegetation can provide a positive method of long-term stormwater management as well as a visual amenity to the site. Other control measures may be required to assist during the establishment of vegetation. These other controls include erosion control blankets, mulching, swales, and dikes to direct flow around newly seeded areas and proper grading to limit runoff velocities during construction. 2.9.2 Applications Vegetation effectively reduces erosion in channels and swales and on stockpiles, dikes, and mild to medium slopes. Vegetative strips can provide some protection and sediment trapping when used as a perimeter control for utility and site development construction. Refer to Section 3.15 Vegetated Filter Strips and Buffers for more information. In many cases, the initial cost of temporary seeding may be high compared to tarps or covers for stockpiles or other barren areas subject to erosion. This initial cost should be weighed with the amount of time the area is to remain inactive, since vegetation is more effective and the maintenance cost for vegetated areas is much less than most structural controls. 2.9.3 Design Criteria General • Vegetation is a highly effective erosion control when the vegetation is fully established. Until then, additional controls are needed. Sediment controls should not be removed from vegetated areas until the vegetation is established. • On grades steeper than 20:1 (5 percent), anchored mulch or erosion control blankets are required to protect seeded areas until vegetation is established. Refer to Section 2.5 Mulching and Section 2.3 Erosion Control Blankets for design criteria. • Vegetation may be used by itself for channel protection when the channel grade is less than 2 percent and the temporary control design storm (2-year, 24-hour) and the conveyance storm (25- year, 24-hour)flow velocities are less than 6 feet per second. • If the velocity of the temporary control design storm is greater than 2 feet per second, erosion control blankets shall be used in the channel while vegetation is being established. Turf reinforcement mats are required when the velocity exceeds 6 feet per second. Refer to Section 2.3 Erosion Control Blankets and Section 2.8 Turf Reinforcement Mats for design criteria. • Stabilization of channels with vegetation is limited to channels that have side slopes of 3:1 or flatter. • On cut/fill slopes and channels designed to receive temporary or final vegetation, establishment of vegetation shall be initiated immediately after completing grading of the cut/fill slope or channel, and in no case later than 14 days after completion of grading on these features. It is not acceptable to delay establishing vegetation on these highly-erodible areas until completion of construction activities and stabilization of the remainder of the site. Surface Preparation • Unless infeasible, remove and stockpile existing topsoil at the start of grading activities. Store topsoil in a series of small stockpiles instead of one large stockpile to decrease the loss of aerobic soil micro- organisms during stockpiling. Vegetation CC-54 Revised 04/10 ISWMTA4 Technical Manual Construction Controls • Interim or final grading must be completed prior to seeding or sodding. • To minimize soil compaction of areas to be vegetated, limit vehicle and equipment traffic in these areas to the minimum necessary to accomplish grading. • Install all necessary erosion structures such as dikes, swales, diversions, etc. prior to seeding or sodding. • Spread stockpiled topsoil evenly over the disturbed area to be vegetated. • Depth of topsoil shall be a minimum of 4 inches,with 6 inches required where the topsoil is over rock, gravel or otherwise unsuitable material for root growth. After spreading stockpiled topsoil, provide additional top soil as needed to achieve these depths. • Compost Manufactured Topsoil as specified in TxDOT Special Specification 1001 may be used to achieve the specified depths or when it's infeasible to stockpile topsoil. Topsoil may also be acquired from another construction site if there is no space to stockpile the topsoil at that site. • Topsoil shall have an organic content of 10 to 20 percent using ASTM D2974 Standard Test Methods for Moisture, Ash, and Organic Matter of Peat and Other Organic Soils. • Topsoil that does not meet the organic content requirement shall be amended with General Use Compost as specified in TxDOT Special Specification 1001. Amendment should be three parts of topsoil to one part compost by volume thoroughly blended. • Seed bed should be well pulverized and loosened to a minimum depth of 3 inches and then raked to have a uniform surface. • When establishing vegetation from seed, groove or furrow slopes steeper than 3:1 on the contour line before seeding. ( Plant Selection, Fertilization and Seeding • Use only high quality, USDA certified seed. • Use an appropriate species or species mixture adapted to the local climate, onsite soil conditions and the season as shown below, or consult with the local office of the Natural Resource Conservation Service (NRCS) or Texas AgriLife Extension Service for selection of proper species and application technique in this area. • Seeding rate should be in accordance with the Tables 2.4, 2.5 and 2.6 as follow in this section or as recommended by the Natural Resources Conservation Service (NRCS) or Texas AgriLife Extension Service. • Chemical fertilization is not recommended at the time of seeding, because it typically stimulates and is consumed by fast growing weeds that out-compete the slower growing grasses and legumes. If the topsoil has not been amended by compost as discussed above, an 0.5 inch layer of General Use Compost (TxDOT Special Specification 1001) is recommended as a surface treatment to protect the seed and provide slow release nutrients • Evenly apply seed using a seed drill, cultipacker,terraseeding, or hydroseeder. • Hydro-seeding should not be used on slopes of 5:1 or steeper unless Bonded Fiber Matrix is used. • Seeded areas shall be thoroughly watered immediately after planting. Water shall be applied at a rate that moistens the top 6 inches of soil without causing runoff. Provide water daily for the first 14 days after seeding and thereafter as needed to aid in establishment of vegetation. • Use appropriate mulching techniques (Section 2.5 Mulching)where necessary, especially during cold periods of the year. Mulch consisting of chipped site vegetation is discouraged, since the wood content may result in depleting nitrogen from the soil. Vegetation CC-55 Revised 04/10 ISWMTM Technical Manual Construction Controls Sodding • Use of sod should be limited to planned landscapes due to the relatively high water use of most types of sod grass. • When sod is necessary to achieve immediate stabilization, buffalograss (Buchloe dactyloides) is recommended. Other types of sod may be used in landscaping when specified by a landscape architect for a commercial property or a homebuyer for a residential lot. • The sod should be mowed prior to sod cutting so that the height of the grass shall not exceed 3 inches and should not be harvested or planted when its moisture condition is so excessively wet or dry that its survival shall be affected. • Sod shall have a healthy, virile, system of dense, thickly matted roots throughout a minimum soil thickness of 0.75 inch. • Sod shall be planted within 3 days after it is excavated. • In areas subject to direct sunlight, pre-moisten prepared sod bed by watering immediately prior to placing sod. • Sodded areas shall be thoroughly watered immediately after they are planted. Temporary Vegetation The following table lists recommended plant species for the North Central Texas region depending on the season for planting. Table 2.4 Recommended Grass Mixture for Temporary Erosion Control Season Common Name Pure Live Seed Rate (Ibs/Acre) Tall Fescue 4.5 Sep 1 -Nov 30 Western Wheat Grass 5.6 Wheat(Red,Winter) 34.0 May 1 -Aug 31 Foxtail Millet 34.0 Feb 15—May 31 Annual Rye 20.0 Sep 1 —Dec 31 Areas receiving temporary seeding and vegetation shall be landscaped, re-seeded or sodded with perennial species to establish final vegetation at the end of construction. Vegetation for Final Stabilization Sodding or seeding may be used to establish vegetation for final stabilization of areas disturbed by construction activity. The vegetation must achieve a cover that is 70 percent of the native background vegetative cover to be considered final stabilization. Sod will achieve this coverage quicker than seeding; however, sod is usually more expensive than seeding. Sod is most cost-effective for small areas or areas of concentrated flow or heavy pedestrian traffic where it will be difficult to establish vegetation by seeding. Grass seed for establishing final stabilization can be sown at the same time as seeding for temporary (annual) vegetation. Drought tolerant native vegetation is recommended rather than exotics as a long- term water conservation measure. Native grasses can be planted as seed or placed as sod. Buffalo 609, for example, is a hybrid grass that is placed as sod. Fertilizers are not normally used to establish native grasses, but mulching is effective in retaining soil moisture for the native plants. Vegetation CC-56 • Revised 04/10 iSWMTM Technical Manual Construction Controls Table 2.5 Recommended Grass Mixture for Final Stabilization of Upland in Rural Areas County Planting Clay Soils Sandy Soils Date Species and Pure Live Seed Rate Species and Pure Live Seed Rate (Lbs/Acre) (Lbs/Acre) Erath Hood Green Sprangletop 0.3 Green Sprangletop 0.3 Johnson Sideoats Grama(El Reno) 2.7 Sand Lovegrass 0.5 Palo Pinto February 1 - Bermudagrass 0.9 Bermudagrass 1.8 Parker May 15 Little Bluestem(Native) 1.0 Weeping Lovegrass(Ermelo) 0.8 Somervell Blue Grama(Hachita) 0.9 Sand Dropseed 0.4 Tarrant Illinois Bundleflower 1.0 Partridge Peal 1.0 Wise Collin Green Sprangletop 0.3 Green Sprangletop 0.3 Dallas Bermudagrass 1.2 Bermudagrass 1.8 Denton February 1 - Sideoats Grama(El Reno) 2.7 Weeping Lovegrass(Ermelo) 0.6 Ellis May 15 Little Bluestem(Native) 2.0 Sand Lovegrass 0.6 Kaufman Buffalograss(Texoka) 1.6 Sand Dropseed 0.4 Navarro Illinois Bundleflower 1.0 Partridge Pea 1.0 Rockwell Green Sprangletop 0.3 Green Sprangletop 0.3 Sideoats Grama(El Reno) 3.2 Bermudagrass 1.5 Hunt February 1 - Bermudagrass 1.8 Bahiagrass(Pensacola) 6.0 May 15 Little Bluestem (Native) 1.7 Sand Lovegrass 0.6 Illinois Bundleflower 1.0 Weeping Lovegrass(Ermelo) 0.8 Partridge Pea 1.0 (Source: TxDOT Standard Specifications for Construction and Maintenance of Highways,Streets and Bridges,Item 164) Table 2.6 Recommended Grass Mixture for Final Stabilization of Upland in Urban Areas - County- --Planting - Clay Solis - SarrdySdil[--_ Date Species and Pure live Seed Rate Species and Pure Live Seed Rate (Lbs/Acre) (Lbs/Acre) Erath Hood Johnson Green Sprangletop 0.3 Green Sprangletop 0.3 Palo Pinto February 1 - Sideoats Grama(El Reno) 3.6 Sideoats Grama(El Reno) 3.6 Parker May 15 Bermudagrass 2.4 Bermudagrass 2.1 Somervell Buffalograss(Texoka) 1.6 Sand Dropseed 0.3 Tarrant Wise Collin Dallas Green Sprangletop 0.3 Green Sprangletop 0.3 Denton February 1 - Sideoats Grama(El Reno) 3.6 Buffalograss(Texoka) 1.6 Ellis May 15 Buffalograss(Texoka) 1.6 Bermudagrass 3.6 Kaufman Bermudagrass 2.4 Sand Dropseed 0.4 Navarro Rockwell Green Sprangletop 0.3 Hunt February 1 - Bermudagrass 2.4 Green Sprangletop 0.3 May 15 Sideoats Grama(Haskell) 4.5 germ 4 udagrass 5. (Source:TxDOT Standard Specifications for Construction and Maintenance of Highways,Streets and Bridges,Item 164) Vegetation for final stabilization of channels requires grasses that are tolerant of periodic inundation, such as Bermuda grass, Kentucky bluegrass or a grass-legume mixture. Vegetation CC-57 Revised 04/10 ISWMTM Technical Manual Construction Controls Additional Considerations • Conditions for establishing vegetation vary significantly from site to site. Therefore, specifics of the vegetation design should be prepared based on the soil, slopes, drainage patterns, and the purpose of the vegetation at a each site. • For construction activities that include landscaping in the development plans, the landscape architect should be consulted when specifying vegetation for temporary or final stabilization of disturbed areas. • Vegetation is easier to establish if equipment and vehicle traffic is managed onsite to minimize soil compaction by traffic in the disturbed area that will be vegetated. • Establishing a good vegetative cover is dependent on the season of the year. Projects that commence in the fall of the year may not be candidates for using vegetation as an erosion control. • Where vegetation is used in swales and channels it may be necessary to use sod, rather than seeding, to establish an erosion resistant surface that accommodates rainfall runoff flows. • Mulch should be used to enhance vegetative growth, in that mulch protects seeds from heat, prevents soil moisture loss, and provides erosion protection until the vegetation is established. Compost mulch has the additional benefit of providing some slow-release nutrients. • Fertilizers have both beneficial and adverse effects. Fertilizers provide nutrients to the vegetation, but fertilizers are also a source of unwanted nutrients in streams and lakes. In this latter regard, they are a pollutant. The use of native vegetation rather than exotics reduces the need for fertilizers. Organic fertilizers, such as compost mulch, are generally preferred over chemical fertilizers. They provide a slow release of nutrients over a longer period of time and are less likely to cause environmental problems. • Steep slopes represent a problem for establishing vegetation. Hydraulic mulches are useful for establishing vegetation on slopes. Refer to Section 2.5 Mulching. 2.9.4 Design Guidance and Specifications Additional criteria for the application of vegetation in channels are in Section 3.6.3 of the iSWM Criteria Manual and design guidance is in Section 3.2 of the Hydraulics Technical Manual. Specifications for construction of this item may be found in the Standard Specifications for Public Works Construction — North Central Texas Council of Governments, Item 202 Landscaping. Additional specifications for the following components of this item are in the Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges(TxDOT 2004): • Topsoil, Item 160. • Compost, Item 161. • Sodding for Erosion Control, Item 162. • Seeding for Erosion Control, Item 163. • Fertilization, Item 164. • Vegetative Watering 165. 2.9.5 Inspection and Maintenance Requirements Protect newly seeded areas from excessive runoff and traffic until vegetation is established. Include a watering and fertilizing schedule in the iSWM Construction Plan facilitate the establishment of the vegetation. Vegetation for final stabilization must be maintained until the vegetative cover is 70 percent of the native background vegetative cover. Vegetation should be inspected regularly (at least as often as required by the TPDES Construction General Permit)to ensure that the plant material is established properly and remains healthy. Bare spots shall be reseeded and/or protected from erosion by mulch or other measures. Accumulated sediment Vegetation CC-58 Revised 04/10 ISWMTM Technical Manual Construction Controls deposited by runoff should be removed to prevent smothering of the vegetation. In addition, determine the source of excess sediment and implement appropriate measures to control the erosion. Vegetation CC-59 Revised 04/10 ISWMTM Technical Manual Construction Controls 3.4 Inlet Protection Sediment Control Description: Inlet protection consists of a variety of methods to intercept Concrete Plods or other dam device sediment at low point inlets through the use of depressed grading, filter stone, filter fabric, inlet inserts, organic .�� • � 7 Pavement present) filter tubes and other materials. The �h ""'` protection devices are placed around Sediment pondnq area(t'Mm,r Max ,a,area Sol or across the inlet openings to provide DePth) localized detention or filtration of ocean sediment and floatable materials in Cross Section stormwater. Protection devices may be assembled onsite or purchased as manufactured assemblies. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Evaluate drainage patterns to ensure inlet protection will not Slope Protection cause flooding of roadway, property or structures • Never block entire inlet opening Sediment Barrier • Size according to drainage area and flow rates Channel Protection • Include flow bypass for clogged controls and large storm Temporary Stabilization events Final Stabilization f • ADVANTAGES/BENEFITS: Waste Management • May be the only feasible sediment control when all construction is located within rights-of-way Housekeeping Practices DISADVANTAGES/LIMITATIONS: Fe=0.35-0.65 • Limited effectiveness and reliability (Depends on soil type) • High maintenance requirements • Has potential to flood roadways or adjacent properties IMPLEMENTATION CONSIDERATIONS MAINTENANCE REQUIREMENTS: Q Capital Costs • Inspect regularly • Check for and remove blockage of inlet after every storm event • Maintenance • Remove sediment before it reaches half the design height or O Training volume of the inlet protection,more frequently for curb inlets • Repair or replace damaged materials 0 Suitability for Slopes>5% • Clean or replace filter stone and organic filter tubes is when clogged with sediment Other Considerations: • Traffic hazards TARGETED POLLUTANTS • Passage of larger storm events without causing flooding O Sediment • Flow diversion to other inlets or O Nutrients&Toxic Materials drainage points O Oil&Grease O Floatable Materials O Other Construction Wastes Inlet Protection CC-81 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.4.1 Primary Use Inlet protection is typically used as a secondary sediment barrier, due to its limited effectiveness and numerous disadvantages. It is used to reduce sediment in storm sewer systems by serving as a back-up system for areas that have newly applied erosion controls or for other sediment controls that cannot achieve adequate sediment removal by themselves. Inlet protection may be used as a primary sediment control only when all other primary controls are infeasible because of site configuration or the type of construction activity. 3.4.2 Applications Inlet protection is best applied at low point (sump) inlets where stormwater runoff will pond behind the protection measure, and then either filter through the protection measure or flow over a weir created by it. Most inlet protection measures depend on ponding to be effective. These types of inlet protection are not applicable to on-grade curb inlets, where the inlet protection will cause stormwater runoff to bypass the inlet and overload downstream inlets. Only inlet protection measures that allow for use of the inlet opening(e.g. inlet inserts)are applicable as inlet protection for on-grade inlets. Inlet protection is normally used in new developments with new inlets and roads that are not in public use. It has limited applications in developed areas due to the potential for flooding, traffic safety, pedestrian safety, and maintenance problems. Potential applications in developed areas are on parking lot inlets where water can pond without causing damage and during major repairs to existing roadways where no other controls are viable. The application of inlet protection is highly variable due to the wide variety of inlet configurations (existing and new) and site conditions. The schematics in Section 6 show example applications; however, applications in most cases must be site adapted. Different methods and materials may be used. It is the responsibility of the designer to ensure that the methods and materials applied for inlet protection are appropriate to the site and flow conditions following the design criteria in Section 3. 3.4.3 Design Criteria General • Drainage patterns shall be evaluated to ensure inlet protection will not divert flow or flood the roadway or adjacent properties and structures. • Inlet protection measures or devices that completed block the inlet are prohibited. They must also include a bypass capability in case the protection measures are clogged. • Inlet protection must be designed to pass the conveyance storm (25-year, 24-hour)without creating a road hazard or damaging adjacent property. This may be accomplished by any of the following measures: o An overflow weir on the protection measure. o An existing positive overflow swale on the inlet. o Sufficient storage volume around the inlet to hold the ponded water until it can all filter into the inlet. o Other engineered method. • Positive overflow drainage is critical in the design of inlet protection. If overflow is not provided for at the inlet, temporary means shall be provided to route excess flows through established swales, streets, or other watercourses to minimize damage due to flooding. • Filter fabric and wire mesh used for inlet protection shall meet the material requirements specified in Section 3.10 Silt Fence. Inlet Protection CC-82 Revised 04/10 ISWMTM Technical Manual Construction Controls • Block and gravel (crushed stone or recycled concrete) protection is used when flows exceed 0.5 cubic feet per second and it is necessary to allow for overtopping to prevent flooding. • The tube and filler for organic filter tubes shall be in accordance with the criteria in Section 3.6 Organic Filter Tube. • Bags used to secure inlet protection devices on pavement shall be filled with aggregate, filter stone, or crushed rock that is less likely than sand to be washed into an inlet if the bag is broken. Filled bags shall be 24 to 30 inches long, 16 to 18 inches wide, and 6 to 8 inches thick. Bags shall be polypropylene, polyethylene, or polyamide woven fabric with a minimum unit weight of 4 ounces per square yard and meet the following criteria: o Greater than 300 psi Mullen Burst Strength using ASTM D3786 Standard Test Method for Hydraulic Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method. o Greater than 70 percent UV Stability using ASTM D4355 Standard Test Method for Deterioration of Geotextiles by Exposure to Light, Moisture, and Heat in a Xenon Arc Type Apparatus. Curb Inlet Protection • Municipality approval is required before installing inlet protection on public streets. • Special caution must be exercised when installing curb inlet protection on publicly traveled streets or in developed areas. Ensure that inlet protection is properly designed, installed and maintained to avoid flooding of the roadway or adjacent properties and structures. • A two inch overflow gap or weir is required on all curb inlet protection devices. • Traffic cones, warning signs, or other measures shall be installed to warn motorists when the inlet protection measures extend beyond the gutter line. • 2 inch X 4 inch Weir Protection: o Bend wire mesh around the 2 inch x 4 inch board and staple to the board. Bend wire mesh around the bottom of the board, the curb opening, and along the pavement to form a cage for the rock. o Rock bags shall be placed perpendicular to the curb, at both ends of the wooden frame,to disrupt the flow and direct water into the rock filter. Stack the bags two high if needed. • Organic Filter Tube Protection: o The diameter of the tube shall be at least 2 inches less than the height of the inlet opening. The tube should not be allowed to block the entire opening, since it will clog. o The tube shall be placed on 4 inch x 4 inch or 2 inch x 4 inch wire mesh to prevent the tube from sagging into the inlet. o The tube should be long enough to extend a minimum of 12 inches past the curb opening on each side of the inlet. • Hog Wire Weir Protection: o The filter fabric and wire mesh shall extend a minimum of 12 inches past the curb opening on each side of the inlet. o Filter fabric shall be placed on 2 inch x 4 inch wire mesh to prevent the tube from sagging into the inlet. o Rock bags are used to hold the wire mesh and filter fabric in contact with the pavement. At least one bag shall be placed on either side of the opening, parallel to and up against the concrete curb. The bags are in intended to disrupt and slow the flow and ensure it does not go under the fabric. Add bags if needed. Inlet Protection CC-83 Revised 04/10 iSWMT"Technical Manual Construction Controls o If a board is used to anchor the wire mesh and fabric instead of rock bags, the board shall be secured with concrete nails at 3 inches on center. Upon removal clean any dirt or debris from the nailing locations, apply chemical sanding agent, and apply non-shrink grout flush with surface of concrete. • Block and Gravel Protection: o Concrete blocks shall be standard 8 inch x 8 inch x 16 inch concrete masonry units and shall be in accordance with ASTM C139, Concrete Masonry Units for Construction. Filter gravel shall be 3A inch washed stone containing no fines. Angular shaped stone is preferable to rounded shapes. o Concrete blocks are to be placed on their sides in a single row around the perimeter of the inlet, with ends abutting. Openings in the blocks should face outward, not upward. % inch x % inch wire mesh shall then be placed over the outside face of the blocks covering the holes. Filter gravel shall then be piled against the wire mesh to the top of the blocks with the base of the stone being a minimum of 18 inches from the blocks. o Alternatively, where loose stone is a concern (streets, etc.), the filter gravel may be placed in appropriately sized filter fabric bags. o Periodically, when the gravel filter becomes clogged,the gravel must be removed and cleaned in a proper manner or replaced with new gravel and piled back against the wire mesh. • Organic Filter Tube On-Grade Protection: o Organic filter tubes may be used to provide sediment control at on-grade curb inlets where the tube will not be a traffic hazard, such as on residential streets where the pavement adjacent to the curb is allocated to parked cars. Tubes should not be used in this manner where they will extend into an active travel lane. o The filter tube shall be secured in a U-shape by rock bags. Runoff flowing in the gutter will pond within the U until it filters through the tube or overflows around the end. • Inlet protection shall be phased on curb inlets being constructed. Controls shall be installed on the pipe inlet at the bottom of the catch basin as soon as it is installed and while the inlet box and top are being formed or placed. Area Inlet Protection • Installation methods for protection on area inlets vary depending on the type of inlet (drop, "Y," or other) and the type and use of the surface surrounding the inlet (parking lot, playground, etc.). It is the responsibility of the designer to appropriately adapt inlet protection measures and their installation methods for each site condition. Several types may be needed on one project. • Filter Fabric Protection: o Filter fabric protection is appropriate where the drainage area is less than one acre and the basin slope is less than five (5) percent. Filter fabric, posts, and wire mesh shall meet the material requirements specified in Section 3.10 Silt Fence. o A 6 inch wide trench is to be cut 6 inches deep at the toe of the fence to allow the fabric to be laid below the surface and backfilled with compacted earth or gravel. This entrenchment prevents any bypass of runoff under the fence. o Stone overflow structures, according to the criteria in Section 3.10 Silt Fence shall be installed where flow to the inlet is concentrated and more than 1 cubic feet per second. • Excavated Impoundment Protection: o Excavated inlet protection is usually the most effective type of area inlet protection; however, it is only applicable to drop inlets. It should not be applied to Y inlets because it will undermine the concrete pad surrounding the inlet opening. Nor can it be used for inlets on pavement. Inlet Protection CC-84 Revised 04/10 iSWMTM Technical Manual Construction Controls o With this protection method, it is necessary to install weep holes to allow the impoundment to drain completely. o The impoundment shall be sized such that the volume of excavation is equal to or exceeds the runoff volume from the temporary control design storm (2-year, 24-hour) for the inlet's drainage area. o The trap shall have a minimum depth of one foot and a maximum depth of 2 feet as measured from the top of the inlet and shall have side slopes of 2:1 or flatter. • Block and Gravel Protection: o Block and gravel inlet protection is the most stable area inlet protection and can handle more concentrated flows. It may be installed on paved or vegetated surfaces. Loose stone shall be carefully removed from vegetated surfaces at the end of construction to prevent the stone from becoming a mowing hazard. o The inlet protection may be one or two blocks high. Single block heights are applicable for drainage areas up to 3 acres in size. The double block height shall be used for larger drainage areas. o Concrete blocks shall be standard 8 inch x 8 inch x 16 inch concrete masonry units and shall be in accordance with ASTM C139, Concrete Masonry Units for Construction. Filter gravel shall be '/.inch washed stone containing no fines. Angular shaped stone is preferable to rounded shapes. • Organic Filter Tube Protection: o Organic filter tubes may be used on paved or unpaved surfaces. o On paved surfaces, tubes shall be secured in place by rock bags. On unpaved surfaces, the tubes shall be embedded in the ground a minimum of 3 inches and staked at 4 foot spacing. o Designer shall provide calculations and specify the diameter of tube to be used based on the inlet's drainage area and the flow rate of runoff to the inlet. The minimum allowable diameter is 12 inches. Proprietary Inlet Protection • Numerous proprietary protection devices are available from commercial vendors. The devices often have the advantage of being reusable on several projects if they are maintained in good condition. • It is the policy of this manual not to recommend any specific commercial vendors for proprietary controls. However, this subsection is included in order to provide municipalities with a rationale for approving the use of a proprietary inlet protection device within their jurisdiction. • The designer shall work with the supplier to provide the municipality with flow calculations or independent third-party tests that document the device's performance for conditions similar to the ones in which it is proposed to be installed. The conditions that should be considered include: type and size of inlet, inlet configuration, size of contributing drainage area, design flow rate, soil particle sizes to be removed, and other pollutants to be removed. • The designer or vendor of the proprietary device shall provide a minimum of three references for projects where the device has been installed and maintained in operation at a construction site for at least six months. Local references are preferred; but references from other regions can be accepted if a similarity between the reference project and the proposed application can be demonstrated. • Proprietary devices must not completely block the inlet. The device shall have a minimum of a 2 inch wide opening for the length of the inlet when it will be used in areas that water can safely pond to depths deeper than the design depths for the inlet. If ponding is not an option, then the device must have overflow capacity equal to the inlet design flow rate. • Some proprietary devices are available with replaceable pads or filters. These pads or filters have the added benefit or removing pollutants such as metals and oils in addition to removing sediment. Inlet Protection CC-85 Revised 04/10 iSWMTM Technical Manual Construction Controls These types of inserts are recommended in applications where prior or current land use in or adjacent to the construction areas may result in the discharge of pollutants. • Proprietary protection devices shall be in accordance with the General criteria at the beginning of this section and any criteria listed under Curb Inlet Protection and Area Inlet Protection that are not specific to an inlet protection method. 3.4.4 Design Guidance and Specifications Specifications for construction of this item may be found in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments, Section 201.15 Inlet Protection. 3.4.5 Inspection and Maintenance Requirements Inlet protection should be inspected regularly (at least as often as required by the TPDES Construction General Permit). Inlet controls should also be inspected after every storm event to check for collapse into the inlet or other damages that may block flow in the inlet. In addition to routine inspection, inlet protection devices should be observed and monitored during larger storm events to verify that they are not ponding or diverting water in a manner that floods a roadway or damages property. Floatable debris and other trash caught by the inlet protection should be removed after each storm event. Sediment should also be removed from curb inlet protection after each storm event because of the limited storage area associated with curb inlets. Sediment collected at area inlet protection should be removed before it reaches half the height of the protection device. Sediment should be removed from inlets with excavated impoundment protection before the volume of the excavation is reduced by 50 percent. In addition, the weep holes should be checked and kept clear of blockage. Concrete blocks, 2 inch x 4 inch boards, stakes, and other materials used to construct inlet protection should be checked for damaged and repaired or replaced if damaged. When filter fabric or organic filter tubes are used, they should be cleaned or replaced when the material becomes clogged. For systems using filter stone, when the filter stone becomes clogged with sediment, the stones must be pulled away from the inlet and cleaned or replaced. Because of the potential for inlet protection to divert runoff or cause localized flooding, remove inlet protection as soon as the drainage area contributing runoff to the inlet is stabilized. Ensure that all inlet protection devices are removed at the end of the construction. 3.4.6 Example Schematics The following schematics are example applications of the construction control. They are intended to assist in understanding the control's design and function. The schematics are not for construction. They may serve as a starting point for creating a construction detail, but they must be site adapted by the designer. In addition, dimensions and notes appropriate for the application must be added by the designer. Inlet Protection CC-86 Revised 04/10 iSWMT"Technical Manual Construction Controls WIRE MESH INSTALLATION PROCESS PLACE FILTER STONE AFTER WEIR CONSTRUCTION\ WRAP VT X 112"WIRE MESH AROUND TX 4' WEIR BEFORE INSTALLING ANCHOR BOARDS ON TOP T x 4•WEIR 2'MINIMUM LENGTH 2"X 4" T x 4•SUPPORT ANCHOR BOARD ROCK BAG OR 3/4"FILTER STONE ALTERNATE WEIGHT WIRE MESH(1/2"X 1/2") \j\y � , • CURB INLET 7\';\j, .ra.\y/\\\\,- • X 2"X4"WEIR I\ 2•X 4"SUPPORT l\ CATCH BASIN i 2"X 4"WEIR CURB INLET PROTECTION CROSS SECTION N.T.S. i ROCK BAG TO 2"X 4"WEIR PREVENT FLOW UNDER 2 MINIMUM LENGTH THE WIRE MESH 2"X 4"ANCHOR •�;_.:._I BOARD %t %,� WIRE MESH 1/2"X 1/2" X41•--:.'-'''4 2"OPENING • ( ) . y, BETWEEN 2"X 4" :':t;-.4.-44:1 WEIR BOARD AND TOP OF INLET BOX :4;;;;;:--.A CURB INLET �j�e�.:3__pit !n• �, ROCK BAG OR 3/4"FILTER STONE evV7.---::::::::04 �M.', A ALTERNATE WEIGHT WIRE MESH WRAPPED CURB OVER AND SECURED TO 2"X 4"BOARD 2"X 4"WEIR CURB INLET PROTECTION PLAN VIEW N.T.B. NOTE: THIS CONTROL WILL DECREASE THE CAPACITY OF THE INLET. IT SHALL ONLY BE USED WHEN AN ENGINEER HAS DETERMINED THERE IS ADEQUATE STORAGE OR POSITIVE OVERFLOW. Figure 3.5 Schematics of 2"x4"Weir Curb Inlet Protection (Source:Modified from Washington Suburban Sanitary Commission Detail SC-16.0) Inlet Protection CC-87 Revised 04/10 iSWMTN Technical Manual Construction Controls ---12' ORGANIC FILTER TUBE (DIA=2'LESS THAN INLET OPENING) \\%\; CURB INLET \\j�\/\ 4'X 4'WELDED WIRE FABRIC "\ CATCH BASIN ORGANIC FILTER TUBE CURB INLET PROTECTION CROSS SECTION N.T.S. ---12' 4'X 4'WELDED WIRE FABRIC r a 00 _._ `r• ,0•i'i� TOP OF INLET BOX vi�••�i, 'i0�'i'i'i 's ��4•••�M�S i ISWMTM Technical Manual Construction Controls SECURE FILTER FABRIC --12"— TO HOGWIRE AT 2"BELOW ROCK BAG OR USE 1'X 4'BOARD TOP OF INLET OPENING SECURED WITH CONCRETE NAILS O.C. (SEE DESIGN CRITERIA) FILTER FABRIC / CURB INLET /// 2'X 4"-WIRE MESH \\�/T\ CATCH BASIN HOG WIRE WEIR CURB INLET PROTECTION CROSS SECTION �-^12' N.T.S. ROCK BAG OR USE 1'X 4"BOARD a ��:�_��5 SECURED WITH CONCRETE NAILS O.C. i.'• i„,fI" i (SEE DESIGN CRITERIA) 12"MIN .ate �. 40.V '►t'i�'i�i arrti� Vii♦ .., ►......� 2"X 4"WIRE MESH AND FILTER K' FABRIC(LEAVE 2"OPENING beratigilse,V TOP OF INLET BOX FROM TOP OF INLET OPENING 3a TO TOP OF FILTER FABRIC) ‘ 71ri p:��,i�3i'^�i�� 44!ew r% pO�i i i^►i!i !i i^i^�i►^i^i • s L %%%i^i i^ Pitt'4 i�^� 2"X4"WIRE MESH ROCK BAG TO PREVENT 9 vpmetil FLOW UNDER THE HOG WIRE '. .m 'P �i^i'3�O'.�i�►�i 040 44: a-�S•��c��0 i�i�i�i�i�i Pa. Ati %,4404 ,:.4, ir^, ONLY THE WIRE MESH � ti i. .wi ^ * M. EXTENDS TO TOP OF INLET `�.`" Se TO SECURE THE CONTROL SECURE FILTER .!�+....� � FABRIC TO WIRE WITH CURB CLIPS OR HOGRINGS HOG WIRE WEIR CURB INLET PROTECTION PLAN VIEW N.T.S. NOTE: THIS CONTROL WILL DECREASE THE CAPACITY OF THE INLET. IT SHALL ONLY BE USED WHEN AN ENGINEER HAS DETERMINED THERE IS ADEQUATE STORAGE OR POSITIVE OVERFLOW. Figure 3.7 Schematics of Hog Wire Weir Curb Inlet Protection (Source:Modified from City of Round Rock Detail E-03) Inlet Protection CC-89 Revised 04/10 ISWMTM Technical Manual Construction Controls 1 @" M/N CONCRETE BLOCK V� 3/4"FILTER STONE I CURB INLET e�j WIRE MEPLAC D OVER \f� VERTICAL FAC e/ 2"X 4"WOOD STUD \`I,\, CATCH BASIN BLOCK AND GRAVEL FILTER CURB INLET PROTECTION CROSS SECTION N.T.S. •/SW,g •, CONCRETE BLOCK 3/4"FILTER STONE • .� -1"Ip4 I I iS i1 ' O e—•—• Wat.o. Ol . WIRE MESH(1/2"X 1/2") e.' :901 PLACED OVER j13 ,�. TOP OF INLET BOX VERTICAL FAC a itelt ;11a04== p1•I•. 1.41100•41, 2"X 4"WOOD STUD .� CURB 1'11 I ` I '•`1- . BLOCK AND GRAVEL FILTER CURB INLET PROTECTION PLAN VIEW N.T.S. NOTES: 1. DO NOT INSTALL ON INLETS IN A PUBLIC STREET OR OTHER ACTIVE TRAVEL LANE. BLOCK AND GRAVEL FILTER IS INTENDED FOR USE ON LOW POINT(SUMP)INLETS IN PARKING LOTS AND OTHER PAVEMENT THAT IS NOT AN ACTIVE TRAVEL LANE. THIS INLET PROTECTION METHOD ALLOWS FOR FULL USE OF THE INLET DESIGN CAPACITY. 2. INSTALL TRAFFIC CONES AS NEEDED TO MINIMIZE THE POTENTIAL FOR CARS HITTING THE BLOCK AND GRAVEL Figure 3.8 Schematics of Block and Gravel Filter Curb Inlet Protection Inlet Protection CC-90 Revised 04/10 ISWMTM Technical Manual Construction Controls TOP OF INLET BOX ORGANIC FILTER TUBE (9'MINIMUM DIA.) r r/�r rr //X/ of CURB ROCK BAG r// // P TRAFFIC CONE /r O° FLOW OVERFLOW �—3'MAXIMUM — ORGANIC FILTER TUBE ON-GRADE CURB INLET PROTECTION DETAIL N.T.S. NOTES: 1. THIS DETAIL IS INTENDED FOR USE WITH ON-GRADE INLETS(NOT A LOW POINT)WHERE WATER WOULD BE DIVERTED INSTEAD OF PONDING BEHIND THE OTHER TYPES OF INLET PROTECTION. 2. DO NOT INSTALL ON INLETS WHERE THE ORGANIC FILTER TUBE WOULD EXTEND INTO AN ACTIVE TRAVEL LANE. Figure 3.9 Schematic of Organic Filter Tube On-Grade Curb Inlet Protection Inlet Protection CC-91 Revised 04/10 iSWMTM Technical Manual Construction Controls ATTACH FILTER TOP BOARD FOR STABILITY FABRIC SECURELY TO 2"x 4"WIRE FENCE 2"X 4"WOOD POST i'ii'ii'r�r�, O'�'0 FABRIC ANCHORED IN 1 18"MAX. O 'ii•�'� 8'xS"TRENCH BACKFILLED .•.2.5''7_s.�,, WITH COMPACTED EARTH 36"MAX. ��. .' 0.j `''� / �� i/i^✓ /?/i, 12"MIN. �\\i�%�i t ! •.�. `' :. 'e_ '\ f\•`o, v!V ,\/ INLET.:• \., "4' ,' FILTER FABRIC"V"INLET PROTECTION CROSS SECTION N.T.S. ATTACH FILTER TOP BOARD FOR STABILITY FABRIC SECURELY TO 2"x 4"WIRE FENCE 2"X 4'WOOD POST ��%%ii FABRIC ANCHORED IN 18"MAX. �9•% 6"x6"TRENCH BACKFILLED i:•:•• 4 WITH COMPACTED EARTH 36" • t...t. • �W12'MIN. � / psd ` A `I/ yiR P ,'' INLET l FILTER FABRIC DROP INLET PROTECTION CROSS SECTION N.T.S. k.i, FILTER FABRIC / 2'X4"WOOD POST DRAIN GRATE 0000000011-— 0000000000 2"X4"WIRE °1 FENCE \55 / \ BACKING 6 FILTER FABRIC AREA INLET PROTECTION PLAN VIEW N.T.S. NOTES: 1.CONCENTRATED DITCH FLOW COMING FROM ONE OR MORE SIDES TOWARD THE INLET MAY REQUIRE A STONE OVERFLOW STRUCTURE TO BE CONSTRUCTED ON ONE SIDE OF THE INLET(SEE SECTION 3.10 SILT FENCE). 2.POSTS SHALL BE INSTALLED AT EACH CORNER AND BETWEEN CORNERS IF THE DISTANCE IS GREATER THAN 6'BETWEEN CORNER POSTS. Figure 3.10 Schematics of Filter Fabric Area Inlet Protection (Source:City of Plano BMP SP-4) Inlet Protection CC-92 Revised 04/10 ISWMTM Technical Manual Construction Controls EXCAVATED AREA=DESIGN STORM VOLUME OR 3,600 CF PER ACRE DISTURBED FILTER STONE(1/2"X1/2") FOR COVERING WEEP HOLES ,>.y 2:1 MAX SLOPE \• 1 'MIN,\\- cei DROP INLET 6, MAx ? ^%G`�\�� ' ';? y \�\f�\yam 1"DIA WEEP HOLES,TO BE FILLED WITH GROUT PRIOR TO BACKFILLING OF STORAGE AREA EXCAVATED IMPOUNDMENT DROP INLET PROTECTION CROSS SECTION N.T.S. 1 1/2"FILTER STONE :y. Le/ DROP INLET GRATE FLOW ��_��_ i NO FLOW ►,mac - - - _11[u1_u[I _ ea*: PAPAttai EXCAVATED IMPOUNDMENT AREA INLET PROTECTION PLAN VIEW N.T.S. Figure 3.11 Schematics of Excavated Impoundment Area Inlet Protection Inlet Protection CC-93 Revised 04/10 iSWMTM Technical Manual Construction Controls 1/2"x 1/2" MIN. 6"MIN. CONCRETE BLOCKS WIRE SCREEN (2 HIGH MAX.) 4,5 j .111 �./ 1 1/2"FILTER STONE FLOW ,&% %I I j ----FLOW LESS THAre,,,,/\�T\/�ti�r \ : ,nV,. 5%SLOPE 18" INLET MIN BLOCK AND GRAVEL"Y"INLET PROTECTION CROSS SECTION N.T.S. 1/Y x 1/2" CONCRETE BLOCKS WIRE SCREEN j s■;�;;■j ' 1 1/2"FILTER STONE FLOW Alto =j `'� ► - FLOW LESS THAN .■"""'It■ 5%SLOPE DROP 18" • INLET , MIN r---t BLOCK AND GRAVEL DROP INLET PROTECTION CROSS SECTION N.T.S. 1 1/2"FILTER STONE FLOW 1/2"x 1/2" � ._. WIRE SCREEN �i r p� pp 01-0.: DROP INLET 0110000000 GRATE 00000000 CONCRETE 11}11111110 11}11111110 via BLOCKS '• • • Oak FLOW BLOCK AND GRAVEL AREA INLET PROTECTION PLAN VIEW N.T.S. Figure 3.12 Schematics of Block and Gravel Area Inlet Protection (Source:Modified from City of Plano BMP SP-4) Inlet Protection CC-94 Revised 04/10 iSWMTm Technical Manual Construction Controls SEE EMBEDMENT DETAIL --7, -- ki--1-* '• - • .>W.‘ \4\,m."„ . • • .. . 0s. <\ ' < ' 't! '"(.; N z \ " ' y,>2\ * :INLEli■•(.,.;.•\ .1> ORGANIC FILTER TUBE"r INLET PROTECTION CROSS SECTION N.T.S. SEE EMBEDMENT DETAIL v• - x</7/7./••• t;SY\.‘‘,;c1W-s • ,... ,,\.',W,A.,..`•,;`,, >''Yi\.&/q. DROP:. \./'''''/,`<'\•>\•0/\‘''<i‹,"Fe'>•^%.< /'‘‘\:'/ \•'••h•l' ?"2\// j*, INLET .• \ ,.%>> '•\'''''\ • ORGANIC FILTER TUBE DROP INLET PROTECTION CROSS SECTION N.T.S. .'"■..f4,0(:!...,\ / ■rThe.- ORGANIC FILTER TUBE Mc. _ -.- - 4 \ DRAIN GRATE (12"MINIMUM DIAMETER)--.,,NN lilt 11111111111 PI: TX 2"WOOD STAKES ( i Ills 110001111111 . MAX 4'SPACING I 12"MIN.OVERLAP --_-— '0344 eh ORGANIC FILTER TUBE AREA INLET PROTECTION PLAN VIEW. N.T.S. ORGANIC FILTER TUBE 2"x 2"WOOD STAKES MAX 4 SPACING (12"MINIMUM DIA) (EXTEND?MAX ABOVE TOP OF TUBE) SLOPE -I.! VARIES ----....Cc.71 9"MINIMUM 3"EMBEDMENT MINIMUM 1=1111 111=711 Aii 12"MINIMUM 1=1 — r EMBEDMENT EXAMPLE FOR ORGANIC FILTER TUBE N.T.S. Figure 3.13 Schematics of Organic Filter Tube Area Inlet Protection Inlet Protection CC-95 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.6 Organic Filter Tubes Sediment Control ORGANIC 'w ' + Description: Organic filter tubes are comprised of an open weave, mesh tube FILTER TUBE � � p p IMP that is filled with a filter material(compost, r 11111 wood chips,straw,coir,aspen fiber, or a 40 mixture of materials). The tube may be t constructed of geosynthetic material, 40 * plastic, or natural materials. Organic filter - " .i� �` $ .7� tubes are also called fiber rolls,fiber logs, wattles,mulch socks,and/or coir rolls. 1 Filter tubes detain flow and capture WOOD sediment as linear controls along the - 'STAKES .4 contours of a slope or as a perimeter t control down-slope of a disturbed area. ICY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • 9 inch minimum tube diameter when filled Slope Protection • 3 inch minimum embedment in soil • 18 inch minimum overlap at ends of tubes Sediment Barrier • Spacing based on drainage area and slope Channel Protection • Must be staked on soil and secured with rockbags on Temporary Stabilization pavement • Turn ends of tube lines upslope a minimum of 10 feet Final Stabilization Waste Management ADVANTAGES/BENEFITS: Housekeeping Practices • Effective means to treat sheet flow over a short distance • Relatively easy to install Fe=0.50-0.75 • May be used on steep slopes • Can provide perimeter control on paved surfaces or where (Depends on soil type) soil type prevents embedment of other controls IMPLEMENTATION DISADVANTAGES I LIMITATIONS: CONSIDERATIONS • Difficult to remove when wet and/or filled with sediment • Relatively small effective areas for sediment capture C Capital Costs MAINTENANCE REQUIREMENTS: C Maintenance • Inspect regularly 0 Training • Repair eroded areas underneath the organic filter tubes C Suitability for,Slopes>5% -' • Re-align and stake tubes that are dislodged by flow • Remove sediment before it reaches half the height of the Other Considerations: exposed tube • None TARGETED POLLUTANTS • Sediment O Nutrients&Toxic Materials • Oil&Grease O Floatable Materials O Other Construction Wastes Organic Filter Tubes CC-100 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.6.1 Primary Use Organic filter tubes are long, flexible controls that are used along a line of constant elevation (along a contour) on slopes. They are used as perimeter controls down slope of disturbed areas and on side slopes where stormwater may runoff the area. The tubes maintain sheet flow, slow velocities, and capture sediment. When used on slopes, they also shorten the slope length and protect the slope from erosion. 3.6.2 Applications Organic filter tubes include a wide variety of tube and filter materials. Organic filter tubes are used as a perimeter sediment barrier, similar to silt fence, for development projects and linear projects, such as roadways and utilities. They work well on individual residential lots and on lots being re-developed, where space may be limited. Organic filter tubes are most effective with coarse to silty soil types. Additional controls may be needed to remove fine silts and clay soils suspended in stormwater. Organic filter tubes can be used on paved surfaces where it's not possible to stake a silt fence. Applications on paved surfaces include perimeter controls for soil stockpiles, pavement repair areas, utility trenching, and building demolition. When compost filter material is used in tubes on pavement, the material has the added benefit removing some oil and grease from stormwater runoff. Applications on slopes include temporary sediment control during construction and erosion control of the disturbed soil on the slope. Organic filter tubes may be used to control sheet flow on slopes when final stabilization measures are being applied and established. Organic filter tubes may also be used for inlet protection and, in limited cases, as check dams in small drainage swales. Refer to Section 3.4 Inlet Protection and Section 2.1 Check Dam for the design criteria to use organic filter tubes in these applications. 3.6.3 Design Criteria General Criteria • Filter tubes should be installed along the contour. • Tubes shall be staked with 2 inch by 2 inch wooden stakes at a maximum spacing of 4 feet. Rebar or similar metal stakes may be used instead of wooden stakes. • When placed on pavement, sand or rock bags shall be placed abutting the down-slope side of the tubes to prevent runoff from dislodging the tubes. At a minimum, bags shall be placed one foot from each end of the tube and at the middle of the tube. • Filter tubes shall be embedded a minimum of three inches when placed on soil. Placement on rock shall be designed as placement on pavement. • The end of tubes shall overlap a minimum of 18 inches when multiple tubes are connected to form a linear control along a contour or a perimeter. • The last 10 feet (or more) at the ends of a line of tubes shall be turned upslope to prevent bypass by stormwater. Additional upslope lengths of tubes may be needed every 200 to 400 linear feet, depending on the traverse slope along the line of tubes. • The most common sizes of tubes are 9 and 12 inch diameter; however, tubes are available in sizes up to 24 inch diameter. The designer shall specify a diameter based on the site application. Tubes less than 9 inches in diameter when filled shall not be used. • Manufactured organic filter tube products shall have documentation of a minimum 75 percent soil retention using ASTM D7351 Standard Test Method for Determination of Sediment Retention Device Effectiveness in Sheet Flow Applications. Organic Filter Tubes CC-101 Revised 04/10 iSWMTM Technical Manual Construction Controls • When using manufactured tubes, the manufacturer's recommendations for diameter and spacing based on slope, flow velocities, and other site conditions shall be followed when they are more stringent than the design criteria in this section. • When used as a perimeter control on grades of 10:1 or less, criteria in the following table shall be used as a guide for the size and installation rate of the organic filter tube. Table 3.1 Perimeter Control Applications* Drainage Area(Max) Max Flow Length to the Tube Tube Diameter(Min) 1/3 Acre per 100 feet 145 feet 18 inches 1/4 Acre per 100 feet 110 feet 15 inches 1/5 Acre per 100 feet 85 feet 12 inches 1/8 Acre per 100 feet 55 feet 9 inches (Source: Modified and expanded from City of Plano Fact Sheet SP-13) `Applicable on grades of 10:1 or flatter. • When installing organic filter tubes along contours on slopes, criteria in the following table shall be used as a general guide for size and spacing of the tubes. Actual tube diameter and spacing shall be specified by the designer. The designer shall consider the tube manufacturers recommendations, the soil type, flow volume on the slope, required performance life, and erosion control measures that may be used in conjunction with the tubes. Table 3.2 Maximum Spacing for Slope Protection Tube Diameter(Min) Slope(H:V) 9 Inches 12 Inches 18 Inches 24 Inches 5:1 to 10:1 35 feet 40 feet 55 feet 60 feet 4:1 30 feet 40 feet 50 feet 50 feet 3:1 25 feet 35 feet 40 feet 40 feet 2:1 20 feet 25 feet 30 feet 30 feet 1:1 10 feet 15 feet 20 feet 20 feet (Source: Modified and expanded from Iowa Statewide Urban Design and Specifications Standards for Filter Socks) Tube Material • The designer shall specify the type of mesh based on the required life of the tube. At a minimum,the mesh shall have a rated life of one year under field conditions. • If the tubes will be left onsite as part of the final stabilization, they must be constructed of 100 percent biodegradable jute, coir, sisal or similar natural fiber or 100 percent UV photodegradable plastic, polyester or geosynthetic material. • Mesh tubes may be oval or round in cross-section. • Mesh for the tubes shall be open and evenly woven. Size of weave openings shall be specified based on filter material. Openings may range from % inch for Erosion Control Compost to 2 inches for straw and coir. • Mesh should not exceed%inch in diameter. Filter Material • Different filter materials have different properties and will affect sheet flow differently. The designer shall specify the type of material to be used (or excluded)on a particular site. • Straw filter material shall be Certified Weed Free Forage. The straw must be in good condition, air- dried, and not rotten or moldy. Organic Filter Tubes CC-102 Revised 04/10 ISWMTM Technical Manual Construction Controls • Compost shall conform to the requirements for Erosion Control Compost in TxDOT Special Specification 1001 Compost (2004). Compost may provide some oil and grease removal; however, the large percentage of fines in compost will result in less filtering and more ponding of stormwater. • Wood chips shall be 100 percent untreated chips and free of inorganic debris, such as plastic, glass, metal, etc. Wood chip size shall not be smaller than 1 inch and shall not exceed 3 inches in diameter. Shavings shall not be more than 5%of the total mass. 3.6.4 Design Guidance and Specifications Specifications for Erosion Control Compost to be used as filter material may be found in Item 161 of the Standard Specifications for Construction and Maintenance of Highways, Streets, and Bridges (TxDOT 2004)and TxDOT Special Specification 1001 Compost(2004). 3.6.5 Inspection and Maintenance Requirements Organic filter tubes should be inspected regularly (at least as often as required by the TPDES Construction General Permit). The filter tube should be checked to ensure that it is in continuous contact with the soil at the bottom of the embedment trench. Closely check for rill erosion that may develop under the filter tubes. Eroded spots must be repaired and monitored to prevent reoccurrence. If erosion under the tube continues, additional controls are needed. Staking shall be checked to ensure that the filter tubes are not moving due to stormwater runoff. Repair and re-stake slumping filter tubes. Tubes that are split,torn or unraveling shall be repaired or replaced. Check the filter tube material to make sure that it has not become clogged with sediment or debris. Clogged filter tubes usually lead to standing water behind the filter tube after the rain event. Sediment shall be removed from behind the filter tube before it reaches half the height of the exposed portion of the tube. When sediment control is no longer needed on the site, the tubes may be split open and the filter material may be used for mulching during establishment of vegetation for final stabilization if it meets the criteria in Section 2.5 Mulching. 3.6.6 Example Schematics The following schematics are example applications of the construction control. They are intended to assist in understanding the control's design and function. The schematics are not for construction. They may serve as a starting point for creating a construction detail, but they must be site adapted by the designer. In addition, dimensions and notes appropriate for the application must be added by the designer. Organic Filter Tubes CC-103 Revised 04/10 iSWMTM Technical Manual Construction Controls 18"MIN OVERLAP ORGANIC FILTER TUBE 2"x 2"WOOD STAKES (9"MINIMUM DIA) MAX 4'SPACING A�� • TIGHT WITH NO GAPS A ORGANIC FILTER TUBE PERIMETER CONTROL PLAN VIEW N.T.S. SEE EMBEDMENT EXAMPLE ORGANIC FILTER TUBE (9"MINIMUM DIA.) SLOPE VARIES OVERLAP ORGANIC FILTER TUBE 18"MINIMUM 004„, SPACING DEPENDS ON SLOPE STEEPNESS FOR SLOPES OF 2:1 OR STEEPER,A SECOND STAKE AGAINST THE DOWNSLOPE FACE OF THE TUBE MAY BE NEEDED DEPENDING ON SOIL TYPE ORGANIC FILTER TUBE SLOPE PROTECTION PROFILE N.T.S. NOTES: 1. TYPE OF NETTING,FILTER MATERIAL,DIAMETER OF TUBE,AND SPACING OF TUBES SHALL BE SPECIFIED BY THE DESIGNER BASED ON THE FOLLOWING SITE PARAMETERS. •SIZE OF CONTRIBUTING DRAINAGE AREA •STEEPNESS OF SLOPE •GROUND CONDITIONS(SOIL OR PAVEMENT) 2. DESIGNER SHALL SHOW ON THE DRAWINGS THE LOCATIONS WHERE TUBES ARE TO BE TURNED UPSLOPE. UPSLOPE LENGTHS SHALL BE MINIMUM OF 10 FEET. Figure 3.15 Schematics of Organic Filter Tubes Organic Filter Tubes CC-104 Revised 04/10 iSWMTM Technical Manual Construction Controls ORGANIC FILTER TUBE(9"MINIMUM DIA) NO EMBEDMENT NEEDED WHEN INSTALLED 2"x 2"WOOD STAKES MAX 4'SPACING BEHIND A SIDEWALK OR CURB (EXTEND 2"MAX ABOVE TOP OF TUBE) SIDEWALK OR CURB ROW \111 ME= 1 1=1 1 1—I HEI III II=III=1 = — INSTALLATION EXAMPLE FOR ORGANIC FILTER TUBEABUTTING PAVEMENT N.T.S. 2"x 2"WOOD STAKES MAX 4'SPACING ORGANIC FILTER TUBE (EXTEND 2"MAX ABOVE TOP OF TUBE) (9°MINIMUM DIA) SLOPE ■ VARIES 9"-20"PER DESIGN CALCULATIONS — "EMBEDMENT MINIMUM =II— 12"MINIMUM I=–TI III=I I� I=1 EMBEDMENT EXAMPLE FOR ORGANIC FILTER TUBE N.T.S. Figure 3.16 Examples of Organic Filter Tube Installation Methods Organic Filter Tubes CC-105 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.10 Silt Fence Sediment Control Description: A silt fence consists of --�� Drainage area geotextile fabric supported by wire mesh �e Disturbed Irmlts netting or other backing stretched between Area 1 metal posts with the lower edge of the fabric securely embedded six-inches in the 5 Silt Fence soil. The fence is typically located ■ downstream of disturbed areas to intercept runoff in the form of sheet flow. A silt Stabilized Area fence provides both filtration and time for Supports sediment settling by reducing the velocity of the runoff. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: I Perimeter Control • Maximum drainage area of 0.25 acre per 100 linear feet of silt Slope.Protection fence Sediment Barrier • Maximum 200 feet distance of flow to silt fence; 50 feet if slope exceeds 10 percent Channel Protection • Minimum fabric overlap of 3 feet at abutting ends;join fabric to Temporary Stabilization prevent leakage • Turn end of silt fence line upslope a minimum of 10 feet Final Stabilization • Install stone overflow structure at low points or spaced at Waste Management approximately 300 feet if no apparent low point Housekeeping Practices ADVANTAGES/BENEFITS: • Economical means to treat sheet flow Fe=0.50-0.75 • Most effective with coarse to silty soil types (Depends on soil type) DISADVANTAGES/LIMITATIONS: IMPLEMENTATION • Limited effectiveness with clay soils due to clogging CONSIDERATIONS • Localized flooding due to minor ponding at the upslope side of the silt fence G Capital Costs • Not for use as check dams in swales or low areas subject to concentrated flow • Maintenance • Not for use where soil conditions prevent a minimum toe-in 0 Training depth of 6 inches or installation of support posts to a depth of 12 inches O Suitability for Slopes>5% • Can fail structurally under heavy storm flows, creating maintenance problems and reducing effectiveness Other Considerations: MAINTENANCE REQUIREMENTS: • Effects of ponding or the redirection of flow onto • Inspect regularly adjacent areas and property • Repair undercutting,sags and other fence failures • Remove sediment before it reaches half the height of the fence • Repair or replace damaged or clogged filter fabric TARGETED POLLUTANTS • Sediment O Nutrients&Toxic Materials O Oil&Grease • Floatable Materials O Other Construction Wastes Silt Fence CC-143 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.10.1 Primary Use Silt fence is normally used as a perimeter control on the down slope side of disturbed areas and on side slopes where stormwater may runoff the area. It is only feasible for non-concentrated, sheet flow conditions. If it becomes necessary to place a silt fence where concentrated flows may be occur (e.g. where two silt fences join at an angle, or across minor channels or gullies), it will be necessary to reinforce the silt fence at that area by a rock berm or sand bag berm, or other structural measures that will support the silt fence. 3.10.2 Applications Silt fence is an economical means to treat overland, non-concentrated flows for all types of projects. Silt fences are used as perimeter control devices for both site developers and linear(roadway) type projects. They are most effective with coarse to silty soil types. Due to the potential of clogging and limited effectiveness, silt fences should be used with caution in areas that have predominantly clay soil types. In this latter instance, a soils engineer or soil scientist should confirm the suitability of silt fence for that application. Additional controls may be needed to remove fine silts and clay soils suspended in stormwater. 3.10.3 Design Criteria • Fences are to be constructed along a line of constant elevation(along a contour line)where possible. • Silt fence can interfere with construction operations; therefore, planning of access routes onto the site is critical. • Maximum drainage area shall be 0.25 acre per 100 linear feet of silt fence. • Maximum flow to any 20 foot section of silt fence shall be 1 CFS. • Maximum distance of flow to silt fence shall be 200 feet or less. If the slope exceeds 10 percent the flow distance shall be less than 50 feet. • Maximum slope adjacent to the fence shall be 2:1. • Silt fences shall not be used where there is a concentration of water in a channel, drainage ditch or swale, nor should it be used as a control on a pipe outfall. • If 50 percent or less soil, by weight, passes the U.S. Standard Sieve No. 200; select the apparent opening size(A.O.S.)to retain 85percent of the soil. • If 85 percent or more of soil by weight, passes the U.S. Standard Sieve No. 200, silt fences shall not be used unless the soil mass is evaluated and deemed suitable by a soil scientist or geotechnical engineer concerning the erodiblity of the soil mass, dispersive characteristics, and the potential grain- size characteristics of the material that is likely to be eroded. • Stone overflow structures or other outlet control devices shall be installed at all low points along the fence or spaced at approximately 300 feet if there is no apparent low point. • Filter stone for overflow structure shall be 1 '/z inches washed stone containing no fines. Angular shaped stone is preferable to rounded shapes. • Silt fence fabric must meet the following minimum criteria: o Tensile Strength, ASTM D4632 Test Method for Grab Breaking Load and Elongation of Geotextiles, 90-lbs. o Puncture Rating, ASTM D4833 Test Method for Index Puncture Resistance of Geotextiles, Geomembranes, and Related Products, 60-lbs. o Mullen Burst Rating, ASTM D3786 Standard Test Method for Hydraulic Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method, 280-psi. Silt Fence CC-144 Revised 04/10 ISWMTM Technical Manual Construction Controls o Apparent Opening Size, ASTM D4751 Test Method for Determining Apparent Opening Size of a Geotextile, U.S. Sieve No. 30(max)to No. 100(min). o Ultraviolet Resistance, ASTM D4355 Standard Test Method for Deterioration of Geotextiles by Exposure to Light, Moisture, and Heat in a Xenon Arc Type Apparatus, Minimum 70 percent. • Fence posts shall be steel and may be T-section or L-section, 1.3 pounds per linear foot minimum, and 4 feet in length minimum. Wood posts may be used depending on anticipated length of service and provided they are 4 feet in length minimum and have a nominal cross section of 2 inches by 4 inches for pine or 2 inches by 2 inches for hardwoods. • Silt fence shall be supported by steel wire fence fabric as follows: o 4 inch x 4 inch mesh size, W1.4/1.4, minimum 14 gauge wire fence fabric; o Hog wire, 12 gauge wire, small openings installed at bottom of silt fence; o Standard 2 inch x 2 inch chain link fence fabric; or o Other welded or woven steel fabrics consisting of equal or smaller spacing as that listed herein and appropriate gauge wire to provide support. • Silt Fence shall consist of synthetic fabric supported by wire mesh and steel posts set a minimum of 1-foot depth and spaced not more than 6-feet on center. • A 6 inch wide trench is to be cut 6 inches deep at the toe of the fence to allow the fabric to be laid below the surface and backfilled with compacted earth or gravel to prevent bypass of runoff under the fence. Fabric shall overlap at abutting ends a minimum of 3 feet and shall be joined such that no leakage or bypass occurs. If soil conditions prevent a minimum toe-in depth of 6 inches or installation of support post to depth of 12 inches, silt fences shall not be used. • Sufficient room for the operation of sediment removal equipment shall be provided between the silt fence and other obstructions in order to properly maintain the fence. • The last 10 feet (or more) at the ends of a line of silt fence shall be turned upslope to prevent bypass of stormwater. Additional upslope runs of silt fence may be needed every 200 to 400 linear feet, depending on the traverse slope along the line of silt fence. 3.10.4 Design Guidance and Specifications Specifications for construction of this item may be found in the Standard Specifications for Public Works Construction — North Central Texas Council of Governments, Section 201.5 Silt Fence and in the Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges (TxDot 2004) Item 506.2.J and Item 506.4.C.9. The American Society for Testing and Materials has established standard specifications for silt fence materials (ASTM D6461)and silt fence installation (ASTM D6462). 3.10.5 Inspection and Maintenance Requirements Silt fence should be inspected regularly(at least as often as required by the TPDES Construction General Permit) for buildup of excess sediment, undercutting, sags, and other failures. Sediment should be removed before it reaches half the height of the fence. In addition, determine the source of excess sediment and implement appropriate measures to control the erosion. Damaged or clogged fabric must be repaired or replaced as necessary. Silt Fence CC-145 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.10.6 Example Schematics The following schematics are example applications of the construction control. They are intended to assist in understanding the control's design and function. The schematics are not for construction. They may serve as a starting point for creating a construction detail, but they must be site adapted by the designer. In addition, dimensions and notes appropriate for the application must be added by the designer. Silt Fence CC-146 Revised 04/10 ISWMTM Technical Manual Construction Controls MAX 6'SPACING FOR FENCE POST SILT FENCE(MIN HEIGHT 24"ABOVE EXIST.GROUND) 4'MIN LENGTH ` FENCE POST COMPACTED EARTH <<<`�{C c/j4t Z �/C OR ROCK BACKFILL -' ��< c< � <<< roz WIRE MESH BACKING `j CAL �C� LAIC ,. <<`��t�L<<�� < 414:11 MIN EMBEDMENT=1' 6"MIN OW F -70 ftig V �//�2,��L77 TRENCH . FABRIC TOE-IN 6"MIN SILT FENCE EXAMPLE N.T.S. 8'MIN STONE OVERLAP OF FENCE ON EACH SIDE H v 8'MAX 1/2 H vvv;y �I� SILT FENCE vvv vw ►ptIw. .�V. vvv �s�`" vv ie I♦�.•I•.j1'Ilf�.VV J4 VVV AtbabIi∎WI .ekote• vvv vv_i ��.�.i�4�� .�!'`� �Nr� vvv vv fv .isb his E v1-112"FILTER T`4. !;STONE 6"MIN TOP OF v '' STONE,EACH SIDE i4/.j OF SILT FENCE v1 '\% \/ STONE OVERFLOW STRUCTURE EXAMPLE N.T.S. NOTES: 1. DESIGN SHALL SHOW ON THE DRAWINGS THE LOCATIONS WHERE OVERFLOW STRUCTURES SHALL BE INSTALLED. OVERFLOW STRUCTURES ARE REQUIRED AT ALL LOW POINTS AND AT A SPACING OF APPROXIMATELY 300 FT WHERE NO LOW POINT IS APPARENT. 2. DESIGNER SHALL ON THE DRAWINGS THE LOCATIONS WHERE SILT FENCE IS TO BE TURNED UPSLOPE. UPSLOPE LENGTHS SHALL BE A MINIMUM OF 10 FEET. Figure 3.28 Schematics of Silt Fence Silt Fence CC-147 Revised 04/10 ISWMTM Technical Manual Construction Controls 3.11 Stabilized Construction Exit Sediment Control Description: A stabilized Stabilized construction exit is a pad of crushed ��J�j/ Construction Exit stone, recycled concrete or other rock material placed on geotextile filter a, / b •` cloth to dislodge soil and other debris Q / �a from construction equipment and vehicle tires prior to exiting the construction site. The object is to / Length / minimize the tracking of soil onto public roadways where it will be suspended by stormwater runoff. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Slope exit away from offsite paved surface Slope Protection • Minimum width and length dependent on size of disturbed Sediment Barrier area,which correlates to traffic volume • 6 inches minimum thickness of stone layer Channel Protection • Stone of 3 to 5 inches in size Temporary Stabilization • Add a wheel cleaning system when inspections reveal the Final,Stabilization stabilized exit does not prevent tracking Waste Management ADVANTAGES/BENEFITS: Housekeeping Practices • Reduces tracking of soil onto public streets • Directs traffic to a controlled access point Fe=N/A • Protects other sediment controls by limiting the area disturbed DISADVANTAGES I LIMITATIONS: IMPLEMENTATION • Effectiveness dependent on limiting ingress and egress to CONSIDERATIONS the stabilized exit • A wheel washing system may also be required to remove G Capital Costs clay soil from tires,particularly in wet conditions p :Maintenance MAINTENANCE REQUIREMENTS: 0 Training • Inspect regularly 0 Suitability for Slopes>5% • Replace rock when sediment in the void area between the rocks is visible on the surface Other Considerations: • Periodically re-grade and top dress with additional stone to • None maintain efficiency TARGETED POLLUTANTS GO Sediment O Nutrients&Toxic Materials O Oil&Grease O Floatable Materials O Other Construction Wastes Stabilized Construction Exit CC-148 Revised 04/10 iSWMTM Technical Manual Construction Controls 3.11.1 Primary Use Stabilized construction exits are used to remove soil, mud and other matter from vehicles that drive off of a construction site onto public streets. Stabilized exits reduce the need to remove sediment from streets. When used properly,they also control traffic by directing vehicles a single(or two for larger sites) location. Controlling traffic onto and off of the site reduces the number and quantity of disturbed areas and provides protection for other sediment controls by decreasing the potential for vehicles to drive over the control. 3.11.2 Applications Stabilized construction exits are used on all construction sites with a disturbed area of one acre or larger and are a recommended practice for smaller construction sites. A stabilized exit is used on individual residential lots until the driveway is placed. Stabilized construction exits may be used in conjunction with wheel cleaning systems as described in Section 3.16 Wheel Cleaning Systems. 3. 11.3 Design Criteria • Limit site access to one route during construction, if possible;two routes for linear and larger projects. • Prevent traffic from avoiding or shortcutting the full length of the construction exit by installing barriers. Barriers may consist of silt fence, construction safety fencing, or similar barriers. • Design the access point(s) to be at the upslope side of the construction site. Do not place construction access at the lowest point on the construction site. • Stabilized construction exits are to be constructed such that drainage across the exit is directed to a controlled, stabilized outlet onsite with provisions for storage, proper filtration, and removal of wash� water. l.\ • The exit must be sloped away from the paved surface so that stormwater from the site does not discharge through the exit onto roadways. • Minimum width of exit shall be 15 feet. • The construction exit material shall be a minimum thickness of 6 inches. The stone or recycled concrete used shall be 3 to 5 inches in size with little or no fines. • The geotextile fabric must meet the following minimum criteria: o Tensile Strength, ASTM D4632 Test Method for Grab Breaking Load and Elongation of Geotextiles, 300 lbs. o Puncture Strength, ASTM D4833 Test Method for Index Puncture Resistance of Geotextiles, Geomembranes,and Related Products, 120 lbs. o Mullen Burst Rating, ASTM D3786 Standard Test Method for Hydraulic Bursting Strength of Textile Fabrics-Diaphragm Bursting Strength Tester Method, 600 psi. o Apparent Opening Size, ASTM D4751 Test Method for Determining Apparent Opening Size of a Geotextile, U.S. Sieve No.40(max). • Rock by itself may not be sufficient to remove clay soils from wheels, particularly in wet conditions. When necessary, vehicles must be cleaned to remove sediment prior to entering paved roads, streets, or parking lots. Refer to Section 3.16 Wheel Cleaning Systems for additional controls. • Using water to wash sediment from streets is prohibited • Minimum dimensions for the stabilized exit shall be as follows: Stabilized Construction Exit CC-149 Revised 04/10 ISWMTM Technical Manual Construction Controls Table 3.9 Minimum Exit Dimensions Min. Width MTh.Length Disturbed Area of Exit of Exit < 1 Acre 15 feet 20 feet > 1 Acre but<5 25 feet 50 feet Acres ? 5 Acres 30 feet 50 feet • If a wheel cleaning system is used, the width of the stabilized exit may be reduced to funnel traffic into the system. Refer to Section 3.16 Wheel Cleaning. 3.11.4 Design Guidance and Specifications Specifications for construction of this item may be found in the Standard Specifications for Public Works Construction — North Central Texas Council of Governments, Section 201.10 Stabilized Construction Entrance and in the Standard Specifications for Construction and Maintenance of Highways, Streets and Bridges (TxDOT 2004) Item 506.2.E and Item 506.4.C.5. 3.11.5 Inspection and Maintenance Requirements Construction exits should be inspected regularly(at least as often as required by the TPDES Construction General Permit). The stabilized construction exit shall be maintained in a condition that prevents tracking C- or flow of sediment onto paved surfaces. Periodic re-grading and top dressing with additional stone must be done to keep the efficiency of the exit from diminishing. The rock shall be re-graded when ruts appear. Additional rock shall be added when soil is showing through the rock surface. Additional controls are needed if inspections reveal a properly installed and maintained exit, but tracking of soil outside the construction area is still evident. Additional controls may be daily sweeping of all soil spilled, dropped, or tracked onto public rights-of-way or the installation of a wheel cleaning system. 3.11.6 Example Schematics The following schematics are example applications of the construction control. They are intended to assist in understanding the control's design and function. The schematics are not for construction. They may serve as a starting point for creating a construction detail, but they must be site adapted by the designer. In addition, dimensions and notes appropriate for the application must be added by the designer. Stabilized Construction Exit CC-150 Revised 04/10 iSWMTM Technical Manual Construction Controls LENGTH PER DESIGN CALCULATIONS RADIUS=5' GRADE TO DRAIN AWAY FROM STABILIZATION AND PAVED SURFACES i•-�. � a . • • • I- _ eatte. ".isemt• iiiijAti,v... .s,1)..-AV/41,"" ifts..*1.0.tro a.po !Ildtgpiell.fteltAWPAft.4000:"......ItioeloemekalL—m..0111 EXIT MUST BE SLOPED SO '40r WIDTH PER DESIGN THAT STORM WATER IS NOT `L! CALCULATIONS / ALLOWED TO LEAVE THE SITE AND ENTER ROAD TRANSITION TO PAVED SURFACE PLAN VIEW N.T.S. C LENGTH PER DESIGN CALCULATIONS GRADE TO PREVENT RUNOFF FROM LEAVING SITE 0.5'MIN. 41111 tftoldwallegt 4. FILTER FABRIC EXISTING GRADE PAVED SURFAC 3"-5"STONE OR RECYCLED CONCRETE CROSS SECTION N.T.S. NOTE: INSTALL SILT FENCE,CONSTRUCTION SAFETY FENCING,OR SIMILAR BARRIER ALONG THE EXIT TO DIRECT TRAFFIC INTO THE EXIT. Figure 3.29 Schematics of Stabilized Construction Exit Stabilized Construction Exit CC-151 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.0 Material and Waste Controls 4.1 Chemical Management Material and Waste Control Description: Chemical management addresses the potential for stormwater to be polluted with chemical materials and wastes that are used or stored on a construction site. The objective of chemical management is to minimize the potential of stormwater contamination by construction chemicals through appropriate recognition, handling, storage, and disposal practices. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Designate a person responsible for chemical management Slope Protection • Minimize the amount of chemicals and waste stored Sediment Barrier onsite • Provide secondary containment that's 110 percent of Channel Protection the largest container in the containment Temporary Stabilization • Label all containers • Prohibit the discharge of washout water Final Stabilization. • Train workers in proper procedures Waste Management • Provide timely removal of waste materials Housekeeping Practices LIMITATIONS: • Not intended to address site-assessment and pre- IMPLEMENTATION existing contamination CONSIDERATIONS • Does not address demolition activities and potential pre-existing materials, such as lead and asbestos C, Capital Costs • Does not address contaminated soils o Maintenance • Does not address spill and leak response procedures • Does not address chemicals associated with vehicle and • Training equipment management 0 Suitability for Slopes>5% MAINTENANCE REQUIREMENTS: Other Considerations: • Inspect regularly • , TCEQ regulations for • Check for proper storage and evidence of leaks and spills hazardous waste • Make sure all containers are labeled • Check waste containers and dispose of the waste when 90 percent full • Verify procedures are being followed • Train new employees and regularly re-train all employees TARGETED POLLUTANTS o Sediment • Nutrients&Toxic Materials • Oil &Grease o Floatable Materials • Other Construction Wastes Chemical Management CC-178 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.1.1 Primary Use These management practices, along with applicable OSHA, EPA, and TCEQ requirements, are implemented at construction sites to prevent chemicals, hazardous materials, and their wastes from becoming stormwater pollutants. 4.1.2 Applications Chemical management is applicable on all construction sites where chemicals and hazardous materials are stored or used and could result in pollutants being discharged with stormwater. Many chemicals, such as paints, grease, concrete curing compounds, and pesticide are present at most construction sites. Chemical management is most effective when used in conjunction with controls in Section 4.8 Spill and Leak Response Procedures. Management of vehicle and equipment maintenance chemicals is applicable to all construction activities. These chemicals are the most common ones on construction sites; plus, there are specific stormwater permit requirements for vehicle and equipment maintenance. For these reasons, the management of chemicals associated with vehicles and equipment are found in Section 4.10 Vehicle and Equipment Maintenance. Chemical management techniques are based on proper recognition, handling, and disposal practices by construction workers and supervisors. Key elements are education and modification of workers' behavior and provisions for safe storage and disposal. Cooperation and vigilance is required on the part of supervisors and workers to ensure that the procedures are followed. The following list(not all inclusive) gives examples of targeted chemicals: • Paints • Solvents • Stains • Wood preservatives • Cutting oils • Greases • Roofing tar • Pesticides, herbicides, &fertilizers • Concrete curing compound It is not the intent of chemical management to supersede or replace normal site assessment and remediation procedures. Significant spills and/or contamination warrant immediate response by trained professionals. Chemical management shall be applied in combination with criteria in Section 4.8 Spill and Leak Response Procedures. 4.1.3 Design Criteria • Construction plan notes shall require controls for all chemicals, hazardous materials, and their wastes that are potentially exposed to precipitation or stormwater runoff. • Show the location of chemical and hazardous waste storage and secondary containment on the drawings, or require the contractor to add this information. • The contractor should be required to designate a site superintendent, foreman, safety officer, or other senior person who is onsite daily to be responsible for implementing chemical management. • Specify use of the least hazardous chemical to perform a task when alternatives are available. To the extent possible, do not use chemicals that are classified as hazardous materials or that will generate Chemical Management CC-179 Revised 04/10 iSWMTM Technical Manual Construction Controls a hazardous waste. A hazardous material is any compound, mixture, solution, or substance containing a chemical listed on the EPA's Consolidated List of Chemicals Subject to the Emergency Planning and Community Right-to-Know Act(EPCRA) and Section 112(r) of the Clean Air Act (EPA 550-B-01-003, October 2001), available at: http://www.epa.poviceppo/pubs/title3.pdf Chemical and Hazardous Material Storage • As much as possible, minimize the exposure of building materials, building products, landscape materials, fertilizers, pesticides, herbicides, detergents, and other materials to precipitation and stormwater runoff. • Chemicals and hazardous materials shall be stored in their original, manufacturers' containers, inside a shelter that prevents contact with rainfall and runoff. • The amount of chemicals and hazardous materials stored onsite shall be minimized and limited to the materials necessary for the current phase of construction. • Material Safety and Data Sheets(MSDSs)shall be available for all chemicals used or stored onsite. • Chemical and hazardous materials shall be stored a minimum of 50 feet away from inlets, swales, drainage ways, channels, and other waters, if the site configuration provides sufficient space to do so. In no case shall material and waste sources be closer than 20 feet from inlets, swales, drainage ways, channels, and other waters. • Use secondary containment controls for all hazardous materials. Containment shall be a minimum size of 110 percent of the largest chemical container stored within the containment. • If an earthen pit or berm is used for secondary containment, it shall be lined with plastic or other material that is compatible with the chemical being stored. • Chemical and hazardous material storage shall be in accordance with Federal and State of Texas regulations and with the municipality's fire codes. • Storage locations shall have appropriate placards for emergency responders. • Containers shall be kept closed except when materials are added or removed. • Chemicals shall be dispensed using drip pans or within a lined, bermed area or using other spill/overflow protection measures. Washout Procedures • Many chemicals (e.g. stucco, paint, form release oils, curing compounds) used during construction may require washing of applicators or containers after use. The discharge of this wash water is prohibited. • Wash water shall be collected in containers, labeled, and classified for correct waste disposal. • A licensed waste hauler shall be used for wash water. Chemical and Hazardous Waste Handling • Ensure that adequate waste storage volume is available. • Ensure that waste collection containers are conveniently located and compatible with the waste chemicals. • Waste containers shall have lids and be emptied or hauled for disposal when they are 90 percent full or more frequently. • Segregate potentially hazardous waste from non-hazardous construction waste and debris. Chemical Management CC-180 Revised 04/10 iSWMTM Technical Manual Construction Controls • Do not mix different chemical wastes. First, dangerous reactions may result. Second, all of the waste will be classified as the most hazardous waste in the container and will increase disposal costs. • Clearly label all chemical and hazardous waste containers to identify which wastes are to be placed in each container. • Based on information in the Material Safety Data Sheet, ensure that proper spill containment material is available onsite and maintained near the storage area. • Do not allow potentially hazardous waste to be stored on the site for more than 90 days. • Enforce hazardous waste handling and disposal procedures. Disposal Procedures • Regularly schedule waste removal to minimize onsite storage. • Use only licensed waste haulers. • For special and hazardous wastes, use licensed hazardous waste transporter that can classify, manifest and transport the special or hazardous wastes for disposal. • Where possible, send wastes such as used oil to a recycler instead of a disposal facility. • No chemical waste shall be buried, burned or otherwise disposed of onsite. Education • Instruct workers on safe chemical storage and disposal procedures. • Instruct workers in identification of chemical pollutants and proper methods to contain them during storage and use. • Educate workers of potential dangers to humans and the environment from chemical pollutants. • Educate all workers on chemical storage and disposal procedures. • Have regular meetings to discuss and reinforce identification, handling and disposal procedures (incorporate in regular safety seminars). • Establish a program to train new employees. Quality Control • Designated personnel shall monitor onsite chemical storage, use, and disposal procedures. • Educate and if necessary, discipline workers who violate procedures. • Retain trip reports and manifests that document the recycling or disposal location for all chemical, special, and hazardous wastes that all hauled from the site. 4.1.4 Design Guidance and Specifications National guidance for response procedures are established by the Environmental Protection Agency (EPA) in the Code of Federal Regulations (CFR). Specific sections addressing spills are governed by: • 40 CFR Part 261 Identification and Listing of Hazardous Waste. • 40 CFR Part 262 Standards Applicable to Generators of Hazardous Waste. • 40 CFR Part 263 Standards Applicable to Transporters of Hazardous Waste. • 49 CFR Parts 171-178 of the Transportation Hazardous Materials Regulations. Chemical Management CC-181 Revised 04/10 iSWMTM Technical Manual Construction Controls Guidance for storing, labeling, and managing hazardous waste in the State of Texas are established by the Texas Commission on Environmental Quality (TCEQ) in the Texas Administrative Code Title 30, Chapter 335, Industrial Solid Waste and Municipal Hazardous Waste. No specification for chemical management measures is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.1.5 Inspection and Maintenance Requirements Chemical management measures should be inspected regularly (at least as often as required by the TPDES Construction General Permit) for proper storage and evidence of leaks or spills. Check that all chemicals, hazardous materials, and wastes are properly stored and labeled. If not stored properly, take corrective action, and reinforce procedures through re-education of employees. If leaks or spills have occurred, check that proper clean up and reporting procedures have been followed. If procedures have not been followed,take corrective action. Check that all employees have been trained in spill and leak procedures as detailed in Section 4.8 Spill and Leak Response Procedure. t ' Chemical Management CC-182 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.2 Concrete Sawcutting Waste Management Waste Control Description: Sawcutting of concrete pavement is a routine practice used to control shrinkage cracking immediately following placement of plastic concrete. It is also used to remove curb sections and pavement sections for pavement repairs, utility trenches, and driveways. Sawcutting for joints involves sawing a narrow, shallow grove in the concrete, while sawcutting for removals is usually done full depth through the slab. Water is used to control saw blade temperature and to flush the detritus from the sawed groove. The objective of concrete sawcutting waste management is to prevent the resulting slurry of process water and fine particles with its high pH from becoming a water pollutant. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Prohibit discharge of untreated slurry • Educate employees on proper procedures Slope Protection • Continuously vacuum slurry and cuttings during Sediment Barrier sawcutting operation Channel Protection • Block inlets to prevent discharges • Establish an onsite containment area (minimum 1 ft Temporary Stabilization if immediate disposal of the vacuumed slurry Final Stabilization is not feasible • Water evaporation and concrete recycling are the Waste Management recommended disposal methods when slurry is not Housekeeping Practices. vacuumed t LIMITATIONS: • Only one part of concrete waste management IMPLEMENTATION • Does not address concrete demolition waste CONSIDERATIONS MAINTENANCE REQUIREMENTS: O Capital Costs • Check for uncollected slurry after all sawcutting Q Maintenance operations • Inspect collection areas and repair containment as • Training needed 0 Suitability for Slopes>5%. • Dispose of sediment and cuttings when collection area volume is reduced by 50 percent Other Considerations: • Train new employees and regularly re-train all employees • Coordinate with concrete waste management. .". TARGETED POLLUTANTS O Sediment • Nutrients&Toxic Materials o Oil&Grease o Floatable Materials • Other Construction Wastes Concrete Sawcutting Waste Management CC-183 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.2. 1 Primary Use Pavement sawcutting is performed on almost all construction projects that include removal or installation of pavement. Properly managing the slurry and cuttings from sawcutting prevents them from affecting surface and ground water resources. 4.2.2 Applications Concrete sawcutting waste management is applicable on construction activities where sawcutting is part of the work, regardless of the size of the total area disturbed. It is also applicable on repair and maintenance projects that may not be required to implement erosion and sediment controls. Concrete sawcutting waste management is based on the proper collection and disposal of the slurry and cuttings. Employee education is critical to ensuring correct procedures are followed. 4.2.3 Design Criteria • Construction plan notes shall include proper concrete sawcutting waste management procedures. • The contractor should be required to designate the site superintendent, foreman, or other person who is responsible for concrete sawcutting to also be responsible for concrete sawcutting waste management. Slurry Collection • During sawcutting operations, the slurry and cuttings shall be continuously vacuumed or otherwise recovered and not be allowed to discharge from the site. • If the pavement to be cut is near a storm drain inlet, the inlet shall be blocked by sandbags or equivalent temporary measures to prevent the slurry from entering the inlet. Remove the sandbags immediately after completing sawcutting operations, so they do not cause drainage problems during storm events. • The slurry and cuttings shall not be allowed to remain on the pavement to dry out. Slurry Disposal • Develop pre-determined, safe slurry disposal areas. • Collected slurry and cuttings should be immediately hauled from the site for disposal at a waste facility. If this is not possible,the slurry and cuttings shall be discharged into onsite containment. • The onsite containment may be an excavated or bermed pit lined with plastic that is a minimum of 10 millimeters thick. Refer to Section 4.3 Concrete Waste Management for additional design criteria and an example schematic. If the project includes placement of new concrete, slurry from sawcutting may be disposed of in facilities designated for the washout of concrete trucks instead constructing a separate containment. • The containment shall be located a minimum of 50 feet away from inlets, swales, drainage ways, channels, and other waters, if the site configuration provides sufficient space to do so. In no case shall the collection area be closer than 20 feet from inlets, swales, drainage ways, channels and other waters. • Several, portable, pre-fabricated, concrete washout, collection basins are commercially available and are an acceptable alternative to an onsite containment pit. • Remove waste concrete when the containment is half full. Always maintain a minimum of one foot freeboard. Concrete Sawcutting Waste Management CC-184 Revised 04/10 iSWMTM Technical Manual Construction Controls • Onsite evaporation of slurry water and recycling of the concrete waste is the preferred disposal method. When this is not feasible, discharge from the collection area shall only be allowed if a passive treatment system is used to remove the fines. Criteria are in Section 3.7 Passive Treatment System. Mechanical mixing is required in the collection area. The pH must be tested, and discharge is allowed only if the pH does not exceed 8.0. The pH may be lowered by adding sulfuric acid to the slurry water. Dewatering of the collection area after treatment shall follow the criteria in Section 3.3 Dewatering Controls. • Care shall be exercised when treating the slurry water for discharge. Monitoring must be implemented to verify that discharges from the collection area do not violate groundwater or surface water quality standards. • Geotextile fabrics such as those used for silt fence should not be used to control sawcutting waste, since the grain size is significantly smaller than the apparent opening size of the fabric. • Use waste and recycling haulers and facilities approved by the local municipality. Education • Supervisors must be made aware of the potential environmental consequences of improperly handling sawcutting slurry and waste. • Train all workers performing sawcutting operations on the proper slurry and cuttings collection and disposal procedures. 4.2.4 Design Guidance and Specifications No specification for concrete sawcutting waste management is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.2.5 Inspection and Maintenance Requirements Concrete sawcutting waste management measures should be inspected regularly (at least as often as required by the TPDES Construction General Permit). Project personnel should inspect the operations to assure that operators are diligent in controlling the water produced by the sawcutting activities. Pavement should be inspected each day after operations to ensure that waste removal has been adequately performed. Residual waste should be cleaned. Reinforce proper procedures with workers. Inspect the collection area for signs of unauthorized discharges. Repair containment area as needed. Remove sediment and fines when the collection area volume is reduced by 50 percent. Concrete Sawcutting Waste Management CC-185 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.3 Concrete Waste Management Waste Control Description: Concrete waste at construction sites comes in two forms: 1) excess fresh concrete mix, including residual mix washed from trucks and equipment, and 2) concrete dust and concrete debris resulting from demolition. Both forms have the potential to impact water quality through stormwater runoff contact with the waste. The objective of concrete waste management is to dispose of these wastes in a manner that protects surface and ground water. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Prohibit the discharge of untreated concrete washout water Slope Protection • Prohibit dumping waste concrete anywhere except at Sediment Barrier, pre-determined, regulated, recycling or disposal sites Channel Protection • Provide a washout containment with a minimum of 6 cubic feet of containment volume for every 10 cubic Temporary Stabilization yards of concrete placed • Minimum 1 foot freeboard on containment Final Stabilization • Minimum 10 mil plastic lining of containment Waste Management • Washout water evaporation and concrete recycling are Housekeeping Practices the recommended disposal methods • Educate drivers and operators on proper disposal and equipment cleaning procedures LIMITATIONS: IMPLEMENTATION CONSIDERATIONS • Does not address concrete sawcutting waste G Capital Costs MAINTENANCE REQUIREMENTS: G Maintenance • Inspect regularly • Training • Check for and repair any damage to washout o Suitability for Slopes>5% containment areas • Clean up any overflow of washout pits Other Considerations: • Regularly remove and properly dispose of concrete • None waste TARGETED POLLUTANTS o Sediment • Nutrients&Toxic Materials o Oil&Grease o Floatable Materials • Other Construction Wastes Concrete Waste Management CC-186 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.3. 1 Primary Use Concrete waste management is used to prevent the discharge of concrete wash water and waste into stormwater runoff. A number of water quality parameters can be affected by the introduction of concrete, especially fresh concrete. Concrete affects the pH of runoff, causing significant chemical changes in water bodies and harming aquatic life. Suspended solids in the form of both cement and aggregated dust are also generated from both fresh and demolished concrete waste. 4.3.2 Applications Concrete waste management is applicable to all construction sites where existing concrete is being demolished or new concrete is being placed, regardless of the size of the total area disturbed. It is also applicable on repair and maintenance projects that may not be required to implement erosion and sediment controls. 4.3.3 Design Criteria • The discharge of washout water to an inlet, swale, or any portion of the storm drainage system or a natural drainage system (e.g. channel) shall be prohibited. • Construction plan notes shall state that the discharge of concrete washout to anything except a designated containment area is prohibited. • Show the location of the concrete washout containment on the drawings, or require the contractor to provide this information. • The contractor should be required to designate the site superintendent, foreman, or other person who r _ is responsible for concrete placement to also be responsible for concrete waste management. Unacceptable Waste Concrete Disposal Practices • Dumping in vacant areas on the job-site. • Illicit dumping onto off-site lots or any other placed not permitted to receive construction demoliotion debris. • Dumping into ditches, drainage facilities, or natural water ways. • Using concrete waste as fill material or bank stabilization. Recommended Disposal Procedures • Identify pre-determined, regulated, facilities for disposal of solid concrete waste. Whenever possible, haul the concrete waste to a recycling facility. Disposal facilities must have a Class IV (or more stringent) municipal solid waste permit from the TCEQ. • A concrete washout pit or other containment shall be installed a minimum of 50 feet away from inlets, swales, drainage ways, channels, and other waters, if the site configuration provides sufficient space to do so. In no case shall concrete washout occur closer than 20 feet from inlets, swales, drainage ways, channels and other waters. • Provide a washout area with a minimum of 6 cubic feet of containment volume for every 10 cubic yards of concrete poured. Alternatively,the designer may provide calculations sizing the containment based on the number of concrete trucks and pumps to be washed out. • The containment shall be lined with plastic (minimum 10 millimeters thick) or an equivalent measure to prevent seepage to groundwater. • Mosquitoes do not typically breed in the high pH of concrete washout water. However, the concrete washout containment should be managed in a manner that prevents the collection of other water that could be a potential breeding habitat. Concrete Waste Management CC-187 Revised 04/10 iSWMTM Technical Manual Construction Controls o Do not excavate the washout area until the day before the start of concrete placement to minimize the potential for collecting stormwater. o Do not discharge any water or wastewater into the containment except for concrete washout to prevent dilution of the high pH environment that is hostile to mosquitoes. o Remove the waste concrete and grade the containment closed within a week of completing concrete placement. Do not leave it open to collect stormwater. o If water must be pumped from the containment, it shall be collected in a tank, neutralized to lower the pH, and then hauled to a treatment facility for disposal. Alternatively, it may be hauled to a batch plant that has an onsite collection facility for concrete washout water. o Do not pump water directly from the containment to the Municipal Separate Storm Sewer System or a natural drainage way without treating for removal of fine particles and neutralization of the pH. • Multiple concrete washout areas may be needed for larger projects to allow for drying time and proper disposal of the washout water and waste concrete. • Portable, pre-fabricated, concrete washout containers are commercially available and are an acceptable alternative to excavating a washout area. • Evaporation of the washout water and recycling of the concrete waste is the preferred disposal method. After the water has evaporated from the washout containment, the remaining cuttings and fine sediment shall be hauled from the site to a concrete recycling facility or a solid waste disposal facility. • Remove waste concrete when the washout containment is half full. Always maintain a minimum of one foot freeboard. • Use waste and recycling haulers and facilities approved by the local municipality. 1 • When evaporation of the washout water is not feasible, discharge from the collection area shall only be allowed if a passive treatment system is used to remove the fines. Criteria are in Section 3.7 Passive Treatment System. Mechanical mixing is required within the containment for passive treatment to be effective. The pH must be tested, and discharge is allowed only if the pH does not exceed 8.0. The pH may be lowered by adding sulfuric acid to the water. Dewatering of the collection area after treatment shall follow the criteria in Section 3.3 Dewatering Controls. • Care shall be exercised when treating the concrete washout water for discharge. Monitoring must be implemented to verify that discharges do not violate groundwater or surface water quality standards. • On large projects that are using a nearby batch plant, a washout facility associated with the plant and under the plant's TPDES Multi-Sector General Permit may be used instead of installing an onsite containment area for truck washout. Education • Drivers and equipment operators should be instructed on proper disposal and equipment washing practices(see above). • Supervisors must be made aware of the potential environmental consequences of improperly handled concrete waste. Enforcement • The construction site manager or foreman must ensure that employees and pre-mix companies follow proper procedures for concrete disposal and equipment washing. • Employees violating disposal or equipment cleaning directives must be re-educated or disciplined if necessary. Concrete Waste Management CC-188 Revised 04/10 iSWMTM Technical Manual Construction Controls Demolition Practices • Monitor weather and wind direction to ensure concrete dust is not entering drainage structures and surface waters. • Spray water on structures being demolished to wet them before start of demolition operations. Reapply water whenever dust is observed. • Construct sediment traps or other types of sediment detention devices downstream of demolition activities to capture and treat runoff from demolition wetting operations. 4.3.4 Design Guidance and Specifications No specification for concrete waste management is currently available in the Standard Specifications for Public Works—North Central Texas Council of Governemtns. 4.3.5 Inspection and Maintenance Requirements Concrete waste management controls should be inspected regularly (at least as often as required by the TPDES Construction General Permit) for proper handling of concrete waste. Check concrete washout pits and make repairs as needed. Washout pits should not be allowed to overflow. Maintain a schedule to regularly remove concrete waste and prevent over-filling. If illicit dumping of concrete is found, remove the waste and reinforce proper disposal methods through education of employees. 4.3.6 Example Schematics The following schematics are example applications of the construction control. They are intended to assist in understanding the control's design and function. The schematics are not for construction. They may serve as a starting point for creating a construction detail, but they must be site adapted by the designer. In addition, dimensions and notes appropriate for the application must be added by the designer. Concrete Waste Management CC-189 Revised 04/10 ISWMTM Technical Manual Construction Controls EDGE OF -\ PLASTIC LINING 10'MINIMUM JsANDBAG Q O O O N7 T / C9 r L J -ow fl 0 >wv Q� -I© Q O O 0 Q 10 MIL.PLASTIC LINING CONCRETE WASHOUT PLAN VIEW N.T.S. 2'MIN 10 MIL PLASTIC - LINING SANDBAG Z i i' iii 2 A CONCRETE WASHOUT SECTION A-A N.T.S. NOTE: SANDBAGS MAY BE REPLACED BY A SOIL BERM TO ANCHOR THE PLASTIC UNING. - Figure 4.1 Schematics of Concrete Washout Containment Concrete Waste Management CC-190 Revised 04/10 ISWMTM Technical Manual Construction Controls 4.4 Debris and Trash Management Waste Control Description: Large volumes of debris and trash are often generated at construction sites, including packaging, pallets, wood waste, personal trash, scrap material, and a variety of other wastes. The objective of debris and trash management is to minimize the potential of stormwater contamination from solid waste through appropriate storage and disposal practices. Recycling of construction debris is encouraged to reduce the volume of material to be disposed of and associated costs of disposal. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Implement a job-site waste handling and disposal education and awareness program Slope Protection • Provide sufficient and appropriate waste storage Sediment Barrier containers Channel Protection • Provide timely removal of stored solid waste materials • Train workers and monitor compliance Temporary Stabilization LIMITATIONS: Final Stabilization • Only addresses non-hazardous solid waste Waste Management • One part of a comprehensive construction site waste Housekeeping Practices management program MAINTENANCE REQUIREMENTS: IMPLEMENTATION • Inspect regularly CONSIDERATIONS • Empty waste containers regularly • Clean up loose trash and debris daily o Capital Costs • Verify procedures are being followed • Train new employees and regularly re-train all employees Maintenance • Training TARGETED POLLUTANTS 0 Suitability for Slopes>5% o Sediment Other Considerations: • Nutrients&Toxic Materials •' None o Oil&Grease • Floatable Materials • Other Construction Wastes Debris and Trash Management CC-191 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.4.1 Primary Use Debris and trash management is used to minimize floatables and other wastes in stormwater. By controlling the trash and debris onsite, stormwater quality is improved and the need for extensive clean up upon completion of the project is reduced. 4.4.2 Applications Debris and trash management is applicable on all construction sites where workers are present. Even if the only construction activity is earthwork, workers will still have drink bottles, lunch bags, and other wastes that must be managed. Solid waste management for construction sites is based on proper storage and disposal practices by construction workers and supervisors. Key elements of the program are education and modification of improper disposal habits. Cooperation and vigilance is required on the part of supervisors and workers to ensure that the procedures are followed. The following are lists describing the type of targeted materials. • Construction(and Demolition) Debris: Dimensional lumber Miscellaneous wood (pallets, plywood, etc) Copper(pipe and electrical wiring) Miscellaneous metal (studs, pipe, conduit, sheathing, nails, etc) Insulation 1 Brick and mortar Shingles Roofing materials Gypsum board • Trash: Paper and cardboard (packaging, containers, wrappers) Plastic(packaging, bottles, containers) Styrofoam (cups, packing, and forms) Food and beverage containers Food waste 4.4.3 Design Criteria • Construction plan notes shall include proper debris and trash management procedures. • Show the location of waste storage containers on the drawings, or require the contractor to add this information. • The contractor should be required to designate a site superintendent, foreman, safety officer, or other senior person who is onsite daily to be responsible for implementing debris and trash management. Storage Procedures • All waste sources and storage areas shall be located a minimum of 50 feet away from inlets, swales, drainage ways, channels and other waters, if the site configuration provides sufficient space to do so. Debris and Trash Management CC-192 Revised 04/10 iSWMTM Technical Manual Construction Controls i In no case shall material and waste sources be closer than 20 feet from inlets, swales, drainage ways, channels, and other waters. • Construction waste and trash shall be stored in a manner that minimizes its exposure to precipitation and stormwater runoff. • Whenever possible, minimize production of debris and trash. • Instruct construction workers in proper debris and trash storage and handling procedures. • Segregate potentially hazardous waste from non-hazardous construction site debris. Hazardous waste shall be managed according to the criteria in Section 4.1 Chemical Management. • Segregate recyclable or re-usable construction debris from other waste materials. A goal of re-using or recycling 50 percent of the construction debris and waste is recommended. • Keep debris and trash under cover in either a closed dumpster or other enclosed trash container that limits contact with rain and runoff and prevents light materials from blowing out. • Check the municipality's storage requirements. Some municipalities have specific requirements for the size and type of waste containers for construction sites. • Do not allow trash containers to overflow. Do not allow waste materials to accumulate on the ground. • Prohibit littering by workers and visitors. • Police site daily for litter and debris. • Enforce solid waste handling and storage procedures. Disposal Procedures • If feasible, recycle construction and demolition debris such as wood, metal, and concrete. • Trash and debris shall be removed from the site at regular intervals that are scheduled to empty containers when they are 90 percent full or more frequently. • General construction debris may be hauled to a licensed construction debris landfill (typically less expensive than a sanitary landfill). • Use waste and recycling haulers/facilities approved by the local municipality. • No waste,trash, or debris shall be buried, burned or otherwise disposed of onsite. • Cleared trees and brush may be burned if authorized by the municipality and proper permits are obtained from the county and/or TCEQ. Chipping of trees and brush for use as mulch is the preferred alternative to burning or offsite disposal. Education • Educate all workers on solid waste storage and disposal procedures. • Instruct workers in identification of solid waste and hazardous waste. • Have regular meetings to discuss and reinforce disposal procedures (incorporate in regular safety seminars). • Clearly mark on all debris and trash containers which materials are acceptable. Quality Control • Foreman and/or construction supervisor shall monitor onsite solid waste storage and disposal procedures. • Check the site, particularly areas frequented by workers during lunch and breaks, for loose trash and debris and the end of each work day. Debris and Trash Management CC-193 Revised 04/10 iSWMTM Technical Manual Construction Controls • Discipline workers who repeatedly violate procedures. 4.4.4 Design Guidance and Specifications No specification for debris and trash management measures is found currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.4.5 Inspection and Maintenance Requirements Debris and trash management measures should be inspected regularly (at least as often as required by the TPDES Construction General Permit). If waste containers are overflowing, call the waste hauler immediately for a pick-up. If loose trash and debris are found around the site, reinforce proper waste management procedures through education of workers. Construction sites must maintain separate waste containers clearly marked for non-hazardous, hazardous and recyclable waste. Check solid waste containers for chemical, special, or hazardous wastes that are improperly placed in them. These wastes shall be removed and handled according to criteria in Section 4.1 Chemical Management. The site should be checked for loose litter and debris at the end of each working day. Debris and Trash Management CC-194 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.5 Hyper-Chlorinated Water Management Waste Control Description: Hyper-chlorinated water is routinely used to disinfect new waterlines and appurtenances. Chlorine protects humans from pathogens in water, but it is toxic to aquatic ecosystems. The objective of hyper-chlorinated water management is to discharge the water in a manner that protects surface water and related aquatic ecosystems. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Educate employees on proper procedures • Discharge to sanitary sewer if the system operator Slope Protection. approves Sediment Barrier • Discharge water onsite for natural chlorine attenuation Channel Protection • Use appropriate dosage for chemical de-chlorination based on chemical used and chlorine concentration Temporary Stabilization • Chlorine concentration must be less than 4 ppm before Final Stabilization leaving the site • Use velocity dissipation devices for discharges Waste Management • Always monitor receiving waters for negative effects Housekeeping Practices LIMITATIONS: • Discharge to sanitary sewer limited by sewer capacity IMPLEMENTATION • Discharges limited to areas without vegetation that is to CONSIDERATIONS be preserved • Wet, cool, and overcast days limits chlorine attenuation p Capital.Costs and removal O Maintenance MAINTENANCE REQUIREMENTS: • Training • Monitor continuously during discharge • Check for and repair any erosion caused by discharge 0 Suitability for Slopes>5 A • Sample and test receiving water hourly for chlorine Other Considerations: • None TARGETED POLLUTANTS o Sediment • Nutrients&Toxic Materials o Oil &Grease o Floatable Materials O Other Construction Wastes Hyper-Chlorinated Water Management CC-195 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.5.1 Primary Use Hyper-chlorinated water is used to disinfect new water lines. 4.5.2 Applications Construction sites that install new water lines or repair or replace existing water lines should use hyper- chlorinated water management measures. 4.5.3 Design Criteria • Drawing notes shall include procedures for the proper discharge of hyper-chlorinated water from waterline disinfection. • The contractor should be required to designate the site superintendent, foreman, or other person who is responsible for water line disinfection to also be responsible for hyper-chlorinated water management. • Educate employees about the environmental hazards of high chlorine concentrations and the proper procedures for handling hyper-chlorinated water. • Hyper-chlorinated water shall not be discharged to the environment unless the chlorine concentration is reduced to 4 ppm or less by chemically treating to dechlorinate or by onsite retention until natural attenuation occurs. • Water with a measurable chlorine concentration of less than 4 ppm is considered potable and an authorized discharge; however, large volumes of water with chlorine at this concentration can still be toxic to aquatic ecosystems. Do not discharge water that has been de-chlorinated to 4 ppm directly to surface water. It shall be discharged onto vegetation or through a conveyance system for further t attenuation of the chlorine before it reaches surface water. • Discharges of high flow rate and velocities shall be directed to velocity dissipation devices. Discharge to Sanitary Sewers • The preferred method of disposal for hyper-chlorinated water is discharge into a sanitary sewer system. • Permission from the sanitary sewer operator must be obtained to discharge to the sanitary sewer. • Limitations on discharges to the sanitary sewer are the capacity of the sanitary sewer and the availability of a sewer manhole near the construction site. • The designer shall verify that the sanitary sewer is capable of receiving the flow rate that will result from dewatering the disinfected line within the required time. • Consideration should be given to timing the discharge with the daily low flow period for the sanitary sewer system. Onsite Discharge • Hyper-chlorinated water may be applied to the construction site if it can be done without causing a discharge. The feasibility of this option is dependent on the volume of water, the size of the construction site, and the conditions of the site. Site application should not be done when the soil moisture content is high due to recent storm events. • Chlorine can burn vegetation, so it should not be used to water vegetation that is being used for stabilization, vegetated filters or buffers,or other vegetation to be preserved. • Hyper-chlorinated water may be discharged to an onsite retention area until natural attenuation occurs. The area may be a dry stormwater retention basin, or a portion of the site may be graded to form a temporary pit or bermed area. Hyper-Chlorinated Water Management CC-196 Revised 04/10 iSWMTM Technical Manual Construction Controls • Natural attenuation of the chlorine may be aided by aeration. Air can be added to the water by directing the discharge over a rough surface(e.g. riprap)before it enters the temporary retention area or an aeration device(e.g. circulation pump)can be placed in the retention area. • Onsite discharge may require several hours to a few days before the water is safe to discharge. The rate at which chlorine will attenuate is affected by soil conditions and weather conditions. Attenuation will occur quickest during warm, sunny, dry periods. • If the hyper-chlorinated water is retained in a pit or basin, and then pumped to discharge, pumping shall follow the criteria in Section 3.3 Dewatering Controls. Chemical Dechlorination • If non-chemical means of dechlorination are not feasible, chemical methods may be used to neutralize the chlorine before discharging the hyper-chlorinated water. • Vitamin C in the form of ascorbic acid or sodium ascorbate is the preferred dechlorination agent. • Consider the National Fire Protection Association (NFPA) rating when selecting a dechlorination chemical. The NFPA rating is given by a series of three numbers ranging from 0 to 4, with 0 being no risk and 4 the highest risk. The sequence of numbers rank the health hazard, flammability risk and reactivity risk of the chemical. A NFPA rating of 0,0,0 indicates no risk for all three categories. • Ensure appropriate personal protective equipment (PPE) is specified for workers depending on the chemical being used to neutralize the chlorine. • The chemicals listed in Table 4.1 may be used to neutralize chlorine. Table 4.1 Chemical Dechlorination Agents and Approximate Dosages Dechlorinating Dosing Rate Advantages Disadvantages Agent (Parts Agent• parts Chlorine) Ascorbic Acid 2.5:1 • Not toxic to aquatic species • May lower pH in receiving (form of • Quick reaction time water Vitamin C) • NFPA rating of 0,0,0 Sodium 2.8:1 • Does not affect pH • Greater amount needed than Ascorbate • Not toxic to aquatic species Ascorbic Acid (form of • Quick reaction time • More expensive Vitamin C) • NFPA rating of 0,0,0 Sodium 2:1 to 7:1 • Less expensive • Must calculate dosage based Thiosulfate depending on • Readily available on pH pH • Long history of use • Skin, eye, nose and throat (familiarity) irritant • Consumes oxygen in water • May encourage bacterial growth in receiving streams Calcium 1:1 to 0.5:1 • Less expensive • Must calculate dosage based Thiosulfate depending on • Not toxic to aquatic species on pH pH • NFPA rating of 0,0,0 • Over-dosing produces suspended solids • Over-dosing may increase turbidity in receiving water • May encourage bacterial growth in receiving streams • The designer shall confirm dosages with the chemical supplier before using the dechlorination agent. Hyper-Chlorinated Water Management CC-197 Revised 04/10 iSWMTM Technical Manual Construction Controls • Chlorine and residual agent concentrations and the pH of the discharged water shall be monitored at least hourly using field tests. • The treated water should be discharged onto pavement or into a dry conveyance system to allow aeration and reaction time before the dechlorinated water reaches the receiving water. The receiving water should be closely monitored for any signs of negative effects from the discharge. 4.5.4 Design Guidance and Specifications No specification for hyper-chlorinated water management is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.5.5 Inspection and Maintenance Requirements Hyper-chlorinated water management measures should be monitored continuously while the hyper- chlorinated water is being discharged. Discharges to a sanitary sewer should be monitored for back-ups or overflows that indicate the discharge is exceeding the sewer's capacity. If these occur, the rate of discharge must be decreased or another discharge method is needed. Onsite or chemically treated discharge should be monitored for chlorine and residual chemical concentrations. Verify that discharges are not causing erosion, and modify the discharge to use velocity dissipation devices if erosion is occurring. Repair any eroded areas. If water is being pumped from a temporary retention area,verify that appropriate dewatering controls are in place. For all discharges, frequently inspect the receiving water for any evidence of negative effects. Sample and test the receiving water hourly for chlorine. Stop the discharge immediately if chlorine is detected and modify the discharge procedures before resuming. Hyper-Chlorinated Water Management CC-198 Revised 04/10 ISWMTA4 Technical Manual Construction Controls 4.6 Sandblasting Waste Management Waste Control Description: The objective of sandblasting waste management is to minimize the potential of storrnwater quality degradation from sandblasting activities at construction sites. The key issues in this program are prudent handling and storage of sandblast media, dust suppression, and proper collection and disposal of spent media. It is not the intent of this control to outline all of the worker safety issues pertinent to this practice. Safety issues should be addressed by construction safety programs as well as local, state, and federal regulations. KEY CONSIDERATIONS APPLICATIONS; DESIGN CRITERIA: Perimeter Control • Prohibit discharge of sandblasting waste Slope Protection • Provide site specific fugitive dust control and containment equipment Sediment Barrier • Educate employees on proper procedures Channel Protection • Provide proper sandblast equipment for the job • Ensure compliance by supervisors and workers Temporary Stabilization LIMITATIONS: Final Stabilization • Does not address hazardous materials that may be Waste Management present in the waste Housekeeping Practices • Does not address spill and leak response procedures MAINTENANCE REQUIREMENTS: • Inspect regularly IMPLEMENTATION • Contain and dispose of sandblast grit CONSIDERATIONS • Train new employees and regularly re-train all employees • Capital Costs • Maintenance TARGETED POLLUTANTS • Training o Sediment o Suitability for Slopes>5% • Nutrients&Toxic Materials Other Considerations: o Oil &Grease • OSHA requirements o Floatable Materials • Special procedures for sandblasting operations on • Other Construction Wastes structures know.to contain hazardous materials • Possible site assessment or remediationrequired if hazardous materials present Sandblasting Waste Management CC-199 Revised 04/10 ISWMTM Technical Manual Construction Controls 4.6.1 Primary Use Sandblasting is typically used to clean a surface or prepare a surface for coatings. Since the sandblasting media consists of fine abrasive granules, it can be easily transported by running water. Sandblasting activities typically create a significant dust problem that must be contained and collected to prevent off-site migration of fines. Particular attention must be paid to sandblasting work on bridges, box culverts, and head walls that span or are immediately adjacent to streams and waterways. 4.6.2 Applications This control should be implemented when sandblasting operations will occur on a construction site. If a discharge of sandblasting waste occurs, it shall be considered a spill and handled according to the criteria in Section 4.8 Spill and Leak Response Procedures. 4.6.3 Design Criteria • Construction plan notes shall include proper sandblasting waste management procedures. • The contractor should be required to designate the site superintendent, foreman, or other person who is responsible for sandblasting to also be responsible for sandblasting waste management. • Prohibit the discharge of sandblasting waste. Operational Procedures • Use only inert, non-degradable sandblast media. • Use appropriate equipment for the job; do not over-blast. • Wherever possible, blast in a downward direction. • Install a windsock or other wind direction instrument. • Cease blasting activities in high winds or if wind direction could transport grit to drainage facilities. • Install dust shielding around sandblasting areas. • Collect and dispose of all spent sandblast grit, use dust containment fabrics and dust collection hoppers and barrels. • Non-hazardous sandblast grit may be disposed in permitted construction debris landfills or permitted sanitary landfills. • If sandblast media cannot be fully contained, construct sediment traps downstream from blasting area where appropriate. • Use sand fencing where appropriate in areas where blast media cannot be fully contained. • If necessary, install misting equipment to remove sandblast grit from the air prevent runoff from misting operations from entering drainage systems. • Use vacuum grit collection systems where possible. • Keep records of sandblasting materials, procedures, and weather conditions on a daily basis. • Take all reasonable precautions to ensure that sandblasting grit is contained and kept away from drainage structures. Educational Issues • Educate all onsite employees of potential dangers to humans and the environment from sandblast grit. Sandblasting Waste Management CC-200 Revised 04/10 iSWMTM Technical Manual Construction Controls • Instruct all onsite employees of the potential hazardous nature of sandblast grit and the possible symptoms of over-exposure to sandblast grit. • Instruct operators of sandblasting equipment on safety procedures and personal protection equipment. • Instruct operators on proper procedures regarding storage, handling and containment of sandblast grit. • Instruct operators and supervisors on current local, state and federal regulations regarding fugitive dust and hazardous waste from sandblast grit. • Have weekly meetings with operators to discuss and reinforce proper operational procedures. • Establish a continuing education program to indoctrinate new employees. Materials Handling Recommendations • Sandblast media should always be stored under cover away from drainage structures. • Ensure that stored media or grit is not subject to transport by wind. • Ensure that all sandblasting equipment and storage containers comply with current local, state and federal regulations. • Refer to Section 4.1 Chemical Management if sandblast grit is known or suspected to contain hazardous components. • Capture and treat runoff,which comes into contact with sandblasting material or waste. Quality Assurance • Foreman and/or construction supervisor should monitor all sandblasting activities and safety procedures. • Educate and if necessary, discipline workers who violate procedures. • Take all reasonable precautions to ensure that sandblast grit is not transported off-site or into drainage facilities. 4.6.4 Design Guidance and Specifications No specification for sandblasting waste management is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.6.5 Inspection and Maintenance Requirements Sandblasting waste management measures should be inspected regularly (at least as often as required by the TPDES Construction General Permit). Verify that sandblasting grit is contained and disposed of properly. Check for downstream locations and the off-site perimeter for evidence of discharges or off-site transport by wind. Check that daily records of sandblasting activities are current. Hold weekly meetings with operators to reinforce proper procedures. Regularly re-educate employees on potential dangers and hazards, safety procedures and proper handling. Sandblasting Waste Management CC-201 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.7 Sanitary Waste Management Waste Control Description: The objective of sanitary waste management is to provide for collection and disposal of sanitary waste in a manner that minimizes the exposure to precipitation and stormwater. This is most often accomplished by providing portable facilities for construction site workers. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Provide sanitary facilities at the rate of one toilet per 10 workers for a 40-50 hour work week Slope Protection • Locate portable toilets a minimum of 50 feet away from Sediment Barrier storm drain inlets, conveyance channels or surface Channel Protection waters • If unable to meet the 50 foot requirement, locate Temporary Stabilization. portable toilets at least 20 feet away and provide final Stabilization` secondary containment • Show location of portable toilets on the drawings Waste Management • Have a plan to clean up spills Housekeeping Practices "! LIMITATIONS: • Multiple facilities and/or facilities in several locations may be needed to adequately serve a construction site IMPLEMENTATION • Facilities are subject to vandalism if not within a CONSIDERATIONS secured construction site o Capital Costs MAINTENANCE REQUIREMENTS: Q Maintenance • Inspect regularly • Check for proper servicing, leaks and spills C Training • Service toilets at the frequency recommended by the 0 Suitability for Slopes>5% supplier Other Considerations: TARGETED POLLUTANTS • None o Sediment • Nutrients&Toxic Materials O Oil&Grease O Floatable Materials • Other Construction Wastes Sanitary Waste Management CC-202 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.7. 1 Primary Use Sanitary facilities are used to properly store and dispose of sanitary wastes that are generated onsite. 4.7.2 Applications Sanitary facilities should be available to workers at all construction sites. If permanent facilities are not available, portable toilets are placed at the construction site. 4.7.3 Design Criteria • Construction plan notes shall include requirements for the contractor to provide an appropriate number of portable toilets based on the number of employees using the toilets and the hours they will work. The typical standard is one portable toilet per 10 workers for a 40-50 hour work week. • The location of portable toilets shall be shown on the drawings. • Sanitary facilities shall be placed a minimum of 50 feet away from storm drain inlets, conveyance channels or surface waters. If unable to meet the 50 foot requirement due to site configuration, portable toilets shall be a minimum of 20 feet away from storm drain inlets, conveyance channels or surface waters and secondary containment shall be provided in case of spills. • The location of the portable toilets shall be accessible to maintenance trucks without damaging erosion and sediment controls or causing erosion or tracking problems. • Sanitary facilities shall be fully enclosed and designed in a manner that minimizes the exposure of sanitary waste to precipitation and stormwater runoff. ( • When high winds are expected, portable toilets shall be anchored or otherwise secured to prevent them from being blown over. • The company that supplies and maintains the portable toilets shall be notified immediately if a toilet is tipped over or damaged in a way that results in a discharge. Discharged solid matter shall be vacuumed into the septic truck by the company that maintains the toilets. A solution of 10 parts water to 1 parts bleach shall be applied to all ground surfaces contaminated by liquids from the toilet. • The operator of the municipal separate storm sewer system (MS4) shall be notified if a discharge from the portable toilets enters the MS4 or a natural channel. 4.7.4 Design Guidance and Specifications No specification for sanitary facilities is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.7.5 Inspection and Maintenance Requirements Sanitary facilities should be inspected regularly(at least as often as required by the TPDES Construction General Permit) for proper servicing, leaks and spills. Portable toilets shall be regularly serviced at the frequency recommended by the supplier for the number of people using the facility. Sanitary Waste Management CC-203 Revised 04/10 ISWMTM Technical Manual Construction Controls 4.8 Spill and Leak Response Procedures Waste Control Description: Spill and leak response procedures address the management of spills and leaks that may occur at the construction site. The objective of the spill and leak response procedures is to minimize the discharge of pollutants from unplanned releases of chemicals, fuel, motor vehicle fluids, hazardous materials or wastes through appropriate recognition and response procedures. KEY CONSIDERATIONS APPLICATIONS DESIGN CRITERIA: Perimeter Control • Develop procedures based on the Material Safety and Slope Protection Data Sheets for substances onsite • Maintain spill kits for petroleum products and other Sediment Barrier chemicals frequently onsite • Post emergency contact numbers Channel Protection • Designate a spill response coordinator Temporary Stabilization • Train employees Final Stabilization • Review reporting requirements for onsite chemicals Waste Management LIMITATIONS: Housekeeping Practices • Procedures susceptible to being forgotten because they are seldom or never used • Larger spills and spills of extremely hazardous materials IMPLEMENTATION require special equipment and should be handled by CONSIDERATIONS professionals • Not applicable to long-term contamination remediation G Capital Costs Q Maintenance MAINTENANCE REQUIREMENTS: • Training • Review procedures regularly • Verify spill kits, MSDSs, and emergency contacts are 0 Suitability for Slopes>5% readily available • Train new employees and regularly re-train all employees Other Considerations: • OSHA, EPA and TCEQ regulations TARGETED POLLUTANTS o Sediment • Nutrients&Toxic Materials • Oil&Grease o Floatable Materials • Other Construction Wastes Spill and Leak Response Procedures CC-204 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.8. 1 Primary Use Spill and leak procedures are used to minimize the impact of accidental releases on surface water. Pollutants that are of concern for spill and leaks include chemicals, hazardous materials, fuel, motor vehicle fluids, washout waters, and wastes. Spill and leak response is a secondary control. Proper procedures for managing these pollutants should be the primary control and are the best way to prevent the need for spill and leak response. 4.8.2 Applications Spill and leak response procedures are applicable on all construction sites where chemicals, hazardous materials, fuels, etc. are stored or used. They are most important when the construction site is adjacent or near to a floodplain,wetland, stream, or other waters. 4.8.3 Design Criteria General • An effective spill and leak response depends on proper recognition and response practices by construction workers and supervisors. Key elements are education and training. • Records of releases that exceed the Reportable Quantity (RQ) for oil and hazardous substances should be maintained in accordance with the Federal and State regulations. • Emergency contact information and spill response procedures shall be posted in a readily available area for access by all employees and subcontractors. • Spill containment kits should be maintained for petroleum products and other chemicals that are regularly onsite. Materials in kits should be based on containment guidelines in the Material Safety and Data Sheets(MSDSs)for the substance most frequently onsite. • Spill kits are intended for response to small spills, typically less than 5 gallons, of substances that are not extremely hazardous. • Significant spills or other releases warrant immediate response by trained professionals. • Suspected job-site contamination should be immediately reported to regulatory authorities and protective actions taken. Coordinator • The contractor should be required to designate a site superintendent, foreman, safety officer, or other senior person who is onsite daily to be the Spill and Leak Response Coordinator. • The coordinator must have knowledge of and be trained in correct spill and leak response procedures. • The coordinator shall be responsible for implementing the spill and leak procedures and training all employees and sub-contractors on the site-specific spill and leak procedures. The training should include their responsibility to immediately notify the coordinator if a spill or leak occurs. Spill Response • Upon discovery of a spill, employees and subcontractors shall implement the following procedures: o Immediately stop work and clear the area by moving upwind of the spill. o Remove all ignition sources. o Notify the Spill and Leak Response Coordinator. o If there is an immediate danger to health or life, contact 911. Spill and Leak Response Procedures CC-205 Revised 04/10 iSWMTM Technical Manual Construction Controls • The Spill and Leak Response Coordinator shall perform the following when the spill is not immediately dangerous to health and safety: o Consult the MSDS for safety and response procedures. o If it can be done safely, use onsite spill kits and soil to contain the spill. o Notify a hazardous response company to remove and properly dispose of the spilled material and the contaminated containment materials. Spill Reporting • The Spill and Leak Response Coordinator is responsible for notifying authorities of spills and leaks. Notification requirements are based on Reportable Quantities as established by the type or material, quantity and location (onto land or into water in the state)of the release. • Reportable Quantities (RQ) in the State of Texas are established by the TCEQ in Texas Administrative Code Title 30, Chapter 327 (30 TAC 327)Spill Prevention and Control. • The Texas RQ for petroleum products and used oil is 25 gallons released onto land or any amount that causes sheen on water. • Reportable Quantities for all other substances are listed in 30 TAC 327.4, which references the EPA List of Lists(EPA 550-B-01-003)available at: htto://www.eoa.aov/ceppo/pubs/title3.pdf • The Spill and Leak Response Coordinator shall notify the following: o The municipality that operates the local Municipal Separate Storm Sewer System (MS4) if a spill or leak enters public rights-of-way or any type of drainage way or drainage infrastructure within the jurisdiction of the municipality. o State of Texas Spill Report Hotline at 1-800-832-8224 if the spill or leak exceeds the RQ; and during regular business hours, the TCEQ Dallas/Fort Worth Regional Office at 817-588-5800. o National Spill Response Center at 1-800-424-8802 if the spill or leak exceeds the RQ. 4.8.4 Design Guidance and Specifications National guidance for response procedures are established by the Environmental Protection Agency (EPA) in the Code of Federal Regulations (CFR). Specific sections addressing spills are governed by: • 40 CFR Part 68 Chemical Accident Prevention Provisions. • 40 CFR Part 302 Designation, Reportable Quantities(RQ)and Notification. • 40 CFR Part 355 Emergency Planning and Notification. Guidance for emergency response procedures in the State of Texas are established by the Texas Commission on Environmental Quality (TCEQ) in the Texas Administrative Code Title 30, Chapter 327, Spill Prevention and Control. No specification for construction of this item is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. 4.8.5 Inspection and Maintenance Requirements Spill and leak response measures should be inspected regularly (at least as often as required by the TPDES Construction General Permit). Verify that spill containment materials are available for small spills. Also verify that emergency contact information is posted. These phone numbers and Material Safety and Data Sheets should be in a location that is readily accessible to workers. If procedures are lacking, reinforce requirements by re-training employees. Spill and Leak Response Procedures CC-206 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.9 Subgrade Stabilization Management Material Control Description: Lime and other chemicals are used extensively in the North Central Texas region to stabilize pavement subgrades for roadways, parking lots, and other paved surfaces, and as a subgrade amendment for building pad sites. These chemicals are applied to the soil and mixed through disking and other techniques, and then allowed to cure. The objective of subgrade stabilization management is to reduce the potential for runoff to carry the chemicals offsite, where they may impact aquatic life in streams, ponds, and other water bodies. KEY CONSIDERATIONS "APPLICATIONS DESIGN CRITERIA: Perimeter Control • Educate employees on proper procedures • Include procedural controls in stabilization Slope Protection specifications Sediment Barrier • Limit stabilization operations to that which can be Channel Protection thoroughly mixed and compacted by the end of each workday Temporary Stabilization. • Prohibit vehicle traffic, other than water trucks and Final Stabilization mixing equipment, from passing over the area being stabilized until mixing is completed Waste Management • Avoid applications when there is a significant probability Housekeeping Practices of rain that will produce runoff • Roughen areas adjacent and downstream of stabilized areas to intercept lime from runoff IMPLEMENTATION • Provide secondary containment according to Section 4.1 CONSIDERATIONS Chemical Management for stabilizers stored onsite LIMITATIONS: 0 Capital Costs • Prevention of contamination is only effective method G Maintenance • Does not address spill response when discharge G Training occurs 0 Suitability for Slopes>5% MAINTENANCE REQUIREMENTS: Other Considerations: • Inspect down slope perimeters and outfalls regularly during stabilization operations Chemicalinanagement • Immediately halt operations if a discharge is found and controls for onsite storage modify procedures to prevent future discharges of stabilization chemicals TARGETED POLLUTANTS o Sediment C Nutrients&Toxic Materials O Oil&Grease o Floatable Materials O Other Construction Wastes Subgrade Stabilization Management CC-207 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.9.1 Primary Use This measure should be implemented when chemicals are required for soil stabilization. Lime is the most commonly used for stabilization and is considered a chemical. Other agents may also be used for subgrade stabilization depending on the soil and site conditions. 4.9.2 Applications Chemical stabilization can be used under a variety of conditions. The engineer should determine the applicability of chemical stabilization based on site conditions such as available open space, quantity of area to be stabilized, proximity of nearby water courses and other measures employed at the site. The use of diversion dikes and interceptor swales (see appropriate sections) to divert runoff away from areas to be stabilized can be used in conjunction with these techniques to reduce the potential impact of discharges from chemical stabilization. Management of stabilization chemicals is based on implementing procedures to prevent a discharge. If a discharge occurs, it shall be considered a spill and handled according to the criteria in Section 4.8 Spill and Leak Response Procedures. 4.9.3 Design Criteria • Construction plan notes or stabilization shall include procedural controls to minimize the discharge of chemical stabilizers. • The contractor shall limit the amount of stabilizing agent onsite to that which can be thoroughly mixed and compacted by the end of each workday. • Stabilizers shall be applied at rates that result in no runoff. • Stabilization shall not occur immediately before and during rainfall events. • No traffic other than water trucks and mixing equipment shall be allowed to pass over the area being stabilized until after completion of mixing the chemical. • Areas adjacent and downstream of stabilized areas shall be roughened to intercept chemical runoff and reduce runoff velocity. • Geotextile fabrics such as those used for silt fence should not be used to treat chemical runoff, because the chemicals are dissolved in the water and won't be affected by a barrier and the suspended solids are significantly smaller than the apparent opening size of the fabric. • For areas in which phasing of chemical staibilization is impractical, a curing seal (such as Liquid Asphalt, Grace MC-250, or MC-800) applied at a rate of 0.15 gallons per square yard of surface can be used to protect the base. • Use of sediment basins with a significant (>36 hour) drawdown time is encouraged to capture any accidental lime or chemical overflows when large areas are being stabilized (Section 3.9 Sediment Basin). • Provide containment around chemical storage, loading and dispensing areas. • If soil stabilizers are stored onsite, they shall be considered hazardous material and shall be managed according to the criteria in Section 4.1 Chemical Management to capture any accidental lime or chemical overflow. 4.9.4 Design Guidance and Specifications No specification for subgrade stabilization management is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. Subgrade Stabilization Management CC-208 Revised 04/10 ISWMTM Technical Manual Construction Controls 4.9.5 Inspection and Maintenance Requirements Subgrade stabilization operation should be observed frequently as the operations proceed for evidence of discharges. Inspect the down slope perimeter and all outfalls for evidence of discharges. Pay particularly attention to the outfall of drainage pipes connected to inlets within the area being stabilized. If a discharge is found, immediately halt stabilization operations until additional controls can be implemented. 4.9.6 Example Schematic The following schematic is an example application of the construction control. It is intended to assist in understanding the control's design and function. The schematic is not for construction. It may serve as a starting point for creating a construction detail, but it must be site adapted by the designer. In addition, dimensions and notes appropriate for the application must be added by the designer. time Stabilized Surface Roughen slopes r --- F-. Collect runoff ',1'•11; i rT 1-%:7,r,",-;".7,,;77,i ,-i t 1 TTI' T-T T T iTT 7-' P.T TT } Tin T`=,. Ti TTi iTiTttTr. Figure 4.2 Schematic of Controls for Subgrade Stabilization Subgrade Stabilization Management CC-209 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.10 Vehicle and Equipment Management Material and Waste Control Description: Vehicle and equipment management addresses the practices associated with proper use and maintenance of vehicles and equipment at construction sites. The objective is to minimize the discharge of pollutants from vehicle and equipment operation, fueling, maintenance, and washing. KEY CONSIDERATIONS APPUCATIONS DESIGN CRITERIA: Perimeter Control • Prohibit the discharge of maintenance fluids and wash Slope Protection water with soap • If feasible, prohibit onsite vehicle washing Sediment Barrier • If feasible, prohibit onsite maintenance except fueling Channel Protection • Provide secondary containment that's 110 percent of the largest container in the containment Temporary Stabilization • Use spill/overflow devices for fueling Final Stabilization • Never leave a fueling operation unattended • Label all waste containers Waste Management • Train workers in proper procedures Housekeeping Practices LIMITATIONS: • Cost of maintenance, repairs, and spill prevention equipment IMPLEMENTATION • One part of a comprehensive construction site waste CONSIDERATIONS C-N management program • Does not address spill and leak response procedures Capital Costs MAINTENANCE REQUIREMENTS: o Maintenance • Inspect regularly • Training • Check for signs of leaks and spills and take corrective 0 Suitability for Slopes>5% actions • Place drip pans under leaking vehicles and equipment when parked Other Considerations: • Verify procedures are being followed • None • Train new employees and regularly re-train all employees TARGETED POLLUTANTS o Sediment • Nutrients&Toxic Materials • Oil &Grease O Floatable Materials • Other Construction Wastes Vehicle and Equipment Management CC-210 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.10.1 Primary Use Vehicle and equipment management is used to minimize the pollutants that enter stormwater from fueling and maintenance activities. 4.10.2 Applications Vehicle and equipment management is applicable on every construction site. The management controls are most effective when used in conjunction with controls in Section 4.8 Spill and Leak Response Procedures. The management techniques are based on proper recognition and handling of pollutant sources related to vehicles and equipment. Key elements are education, established procedures, and provisions for safe storage and disposal of wastes. The following list (not all inclusive) gives examples of the targeted materials: • Fuels • Lube Oils • Antifreeze • Solvents • Wash water 4. 10.3 Design Criteria • Construction plan notes shall state that the discharge of fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance is prohibited. • Construction plan notes shall state that the discharge of soaps or solvents used in vehicle and equipment washing is prohibited. • On the construction plans, show the location of fuel tanks, motor vehicle fluids storage, and waste storage, including secondary containment, or require the contractor to provide this information. • Provide secondary containment for fuel, new and waste oil, and other maintenance fluids that are stored onsite. Secondary containment shall have a minimum volume of 110 percent of the largest container within the containment. • Criteria for the response to spills of motor vehicle fluids are in Section 4.8 Spill and Leak Response Procedures. • The contractor should be required to designate a site superintendent, foreman, safety officer, or other senior person, who is on the site daily, to be responsible for implementing vehicle and equipment management. Vehicle Washing • Minimize the potential for the discharge of pollutants from equipment and vehicle washing by prohibiting these activities onsite, if practical. Vehicles and equipment should be transported to a commercial vehicle wash facility with appropriate discharge controls. • Designate a wash area if vehicle and equipment washing must be done onsite. Require all washing to be done at this location. The area shall be graded so that all wash water flows to a sediment basin or other sediment control that provides equivalent or better treatment. • Do not use soap for vehicle and equipment washing. Sediment controls will not remove soap from the wash water. Vehicle and Equipment Management CC-211 Revised 04/10 iSWMTM Technical Manual Construction Controls • Vehicle and equipment wash water may contain oils, greases, and heavy metals. Treatment to remove these pollutants is needed in addition to sediment trapping. Any wash water that has sheen on it must be considered polluted and cannot be discharged from the site without appropriate treatment. State or local discharge permits may be required. Maintenance • If possible, prohibit onsite maintenance except for fueling. Otherwise, limit onsite maintenance to routine preventive maintenance. • Maintenance fluids should be stored in appropriate containers (closed drums or similar) and under cover. • The ground under vehicles and equipment parked onsite should be inspected for drips and leaks before each use. Drip pans should be placed under parked vehicles and equipment that leak or drip. • Vehicles and equipment that leak or drip should be removed from the site for repair as soon as possible. • Vehicles and equipment that become inoperative should be removed from the site for repairs. Fueling • Check the municipality's requirements for fuel tanks. Some municipalities have specific requirements for the type of tank and secondary containment. At a minimum, local fire codes apply. • Fuel should be dispensed using a drip pan or other spill/overflow device or within containment berms or other secondary containment. • If the containment control is an earthen pit or berm, the containment shall be lined with plastic. • If an automatic pump is used for fueling, it should be equipped with an overfill protection device. • Workers performing fueling operations shall be trained in the correct procedures for fueling and spill response. • Workers performing fueling operations shall be present and observe the fueling at all times. Fueling shall not be left unattended. • A spill containment kit shall be maintained within 25 feet of the fueling area. Waste Handling and Disposal • Ensure that adequate waste storage volume is available. • All waste containers shall be clearly labeled. • Handling and disposal of waste from vehicle and equipment maintenance should be according to the criteria in Section 4.1 Chemical Management. Education • Instruct workers on procedures for washing, maintaining, and fueling vehicles and equipment. • Instruct workers in identification of pollutants associated with vehicles and equipment. • Have regular meetings to discuss and reinforce procedures(incorporate into regular safety briefings). • Establish a continuing education program to train new employees. 4.10.4 Design Guidance and Specifications No specification for vehicle and equipment management is currently available in the Standard Specifications for Public Works Construction—North Central Texas Council of Governments. Vehicle and Equipment Management CC-212 Revised 04/10 iSWMTM Technical Manual Construction Controls 4.10.5 Inspection and Maintenance Requirements Vehicle and equipment management controls should be inspected regularly(at least as often as required by the TPDES Construction General Permit). Verify that washing, fueling, storage, and disposal procedures are being followed. Correct workers where needed. Fueling and maintenance fluid storage areas should be checked for signs of leakage or spills. If evidence is found, corrective actions should be implemented. Reinforce proper procedures through re-education of employees. Inspect areas where vehicles and equipment are parked for signs of leaks. Use drip pans where needed. Vehicle and Equipment Management CC-213 Revised 04/10 Attachment 9 Maps Project Location Vicinity Map Detailed BMP Map " •''r . ...,,,, , , . . • , •.• t ,- . • ' • • . ...; . .I . ,, „cf . l• ‘..,J4 t - —4..: . . .-,•'-.. . ____,.. -. . ,,*- .i'..- 4 ‘1• #--"" J„:- ,fik '',4 ..i . ', • L., .., . ' .. ...„. ,,,,, .. -* .. ,--.0.--,.....1 ..„,...... .,,..„,,er,„t_.:,;., A,-,-.Alit•Jr... 'r ' • "•''' ', ' ' ' ' ' ' ''. I.: ..,_ . — - - 01.- • ',,-.. .Th• i.'. - •. ''',.114" ../ - , '- '4,,,', ,1",','''',', ?' . ,, ', 4' iliA,W• ' '... - 's--.,i., .71","4,57,gt . , - . ..„fi ,er. . r,..- . '','-'', .,,,,: ''''..' 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I'• .:!1', '''1 -.71' : ".-----', \ • .. ... , 1 ,.• Lt .--- tE") i F. 0.) 4-, , . •— ortp,z: L1J . it;r..z. ... - clii-lt ciV:= 4 0 a 1 , cl • • C D , ., . . .. , r • _ , — •, i I liz-i• • 4110,, o - 1 1 ,z.I \ ''.7i3 '. .•... 52: ■ ' a ) ii • . , \ : • :1261* ,..7 , v / ',, / , . , . , ,.. 1 1 \ . ,... I. ,A,... . . : .•1 !...: , ,.. , . ,,/ -• 1 . . ! : • I , - -- 1.___004__ 1 .'4.12 341 RILVV4 2, .i. \t. \.. 00.0.v........., S -„:‘,.,.-,c,„„„..„„:„.„,,-,,,,,,,,.,,,-„ , Attachment 10 Historic Preservation for Dallas County, Texas National Register of Historical Places - TEXAS (TX), Dallas C... Page 1 of 21 ional Register 444; N istoric Places ;1812 War of 1812 against Britain begins. United States wins series of naval victories but fails in attempts to invade Canada, British burn Capitol and White House in August 1814. °s . r r t£, Historic Districts Vacant/Not In Use TEXAS - Dallas County 1926 Republic National Bank(added 2006 - - #05001543) Also known as Davis Building • --7.z`7 tio » 1309 Main St. , Dallas ' . Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Coburn& Fowler, Hill, H.D. "rI Architectural Style:Skyscraper ' "x ia Area of Significance:Economics, Architecture / Allow Period of Significance: 1950-1974, 1925-1949 Owner:Private Historic Function:Commerce/Trade The Hocking Hills Historic Sub-function:Business, Financial Institution Current Function:Domestic Geological History Current Sub-function:Multiple Dwelling on Display 4928 Bryan Street Apartments (added 2008 - - #08000539) 4928 Bryan Street , Dallas Historic Significance:Architecture/Engineering, Event Architect,builder, or engineer:Jenkins, Cobb& Massey Architectural Style:Mission/Spanish Revival Area of Significance:Architecture, Community Planning And Development Period of Significance: 1950-1974, 1925-1949 Owner:Private Historic Function:Domestic Historic Sub-function:Multiple Dwelling Current Function:Domestic Current Sub-function:Multiple Dwelling http://nationalregisterothistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 2 of 21 Alcalde Street--Crockett School Historic District (added 1995 - - #95000330) 200--500 Alcalde, 421--421A N. Carroll and 4315 Victor , Dallas Historic Significance:Architecture/Engineering Architect, builder, or engineer:Bulger, C.W. Architectural Style:Queen Anne, Bungalow/Craftsman, Colonial Revival Area of Significance:Architecture Period of Significance: 1925-1949, 1900-1924 Owner:Local,Private Historic Function:Domestic, Education Historic Sub-function:School, Single Dwelling Current Function:Domestic, Education Current Sub-function:School, Single Dwelling . Angle, D. M., House (added 1985 - - #85000710) 800 Beltline , Cedar Hill Historic Significance:Architecture/Engineering Architect, builder, or engineer:Unknown Architectural Style:Late Victorian Area of Significance:Architecture Period of Significance: 1875-1899 Owner:Private Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Domestic Current Sub-function:Single Dwelling y Belo, Alfred Horatio, House (added 1975 - - #75001965) 2115 Ross Ave. , Dallas Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:Unknown Architectural Style:Other, Classical Revival Area of Significance:Architecture, Communications Period of Significance:1875-1899 Owner:Private Historic Function:Domestic Historic Sub-function:Single Dwelling http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 3 of 21 Current Function:Vacant/Not In Use ,. Bianchi, Didaco and Ida, House (added 1995 - - #95000311) Also known as Phase IV--East Dallas DAL/DA 599 4503 Reiger Ave. , Dallas Historic Significance:Architecture/Engineering Architect,builder, or engineer:Lang & Witchell Architectural Style:Mission/Spanish Revival Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Domestic Current Sub-function:Single Dwelling Viy Bluitt Sanitarium (added 2006 - - #06000651) 2036 Commerce St. , Dallas Historic Significance:Event, Person Historic Person:Bluitt, Dr. Benjamin R. Significant Year: 1904, 1910 Area of Significance:Black, Commerce, Health/Medicine Period of Significance:1950-1974, 1925-1949, 1900-1924 Owner:Private Historic Function:Commerce/Trade, Health Care Historic Sub-function:Clinic, Hospital, Specialty Store Current Function:Commerce/Trade Current Sub-function:Professional Bromberg, Alfred and Juanita, House (added 2008 - - #08000658) 3201 Wendover Rd. , Dallas Historic Significance:Architecture/Engineering Architect, builder, or engineer:et al., Ford, O'Neil Architectural Style:Other Area of Significance:Architecture Period of Significance: 1925-1949 Owner:Private Historic Function:Domestic, Domestic, Transportation Historic Sub-function: http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 4 of 21 Road-Related, Secondary Structure, Single Dwelling Current Function:Domestic, Domestic, Transportation Current Sub-function:Road-Related, Secondary Structure, Single Dwelling Bryan--Peak Commercial Historic District (added 1995 - - #95000327) 4214--4311 Bryan Ave. and 1325--1408 N. Peak , Dallas Historic Significance:Event, Architecture/Engineering Area of Significance:Architecture, Commerce Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Commerce/Trade, Government, Recreation And Culture Historic Sub-function:Business, Department Store, Post Office, Specialty Store, Theater Current Function:Commerce/Trade, Government, Vacant/Not In Use Current Sub-function:Business, Correctional Facility, Specialty Store iL: Bryant, William, Jr., House (added 1985 - - #85000711) S. Broad and Cooper , Cedar Hill Historic Significance:Person, Architecture/Engineering Architect,builder, or engineer:Unknown Architectural Style:Late Victorian Historic Person:Bryant,William,Jr. Significant Year:1889 Area of Significance:Commerce, Architecture Period of Significance:1875-1899 Owner:Private Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Domestic Current Sub-function:Single Dwelling Building at 3525 Turtle Creek Boulevard (added 2008 - - #08000475) 3525 Turtle Creek Blvd. , Dallas http://nationalregisterothistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 5 of 21 Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:et.al., Meyer, Howard R. Architectural Style:Modern Movement, Skyscraper Area of Significance:Community Planning And Development, Architecture Period of Significance:1950-1974 Owner:Private Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Domestic Current Sub-function:Single Dwelling Busch Building (added 1980 - - #80004489) Also known as Kirby Building 1501--1509 Main St. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Lang& Witchell, Barnett,Hayes &Barnett Architectural Style:Late Gothic Revival, Skyscraper Area of Significance:Architecture, Commerce Period of Significance:1900-1924 Owner:Private Historic Function:Commerce/Trade Historic Sub-function:Department Store Current Function:Commerce/Trade y Busch--Kirby Building (Boundary Increase) (added 1996 - - #96001015) Also known as Kirby Building;A. Harris and Co.;See Also:Busch Building 1501--1509 Main St. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Lang & Witchell Architectural Style:Late Gothic Revival, Art Deco Area of Significance:Commerce, Architecture Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Commerce/Trade Historic Sub-function:Business, Department Store http://nationalregisterothistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 6 of 21 Current Function:Vacant/Not In Use R' Cedar Springs Place (added 1991 - - #91001901) 2531 Lucas Dr. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Centennial Architects, Sharp,Walter Architectural Style:International Style Area of Significance:Community Planning And Development, Social History, Architecture Period of Significance: 1925-1949 Owner:Local Historic Function:Domestic Historic Sub-function:Institutional Housing Current Function:Domestic Current Sub-function:Institutional Housing Central Congregational Church (added 1995 - - #95000307) Also known as Phase IV--East Dallas DAL/DA 96 1530 N. Carroll , Dallas Historic Significance:Architecture/Engineering Architectural Style:Late Gothic Revival Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Religion Historic Sub-function:Religious Structure Current Function:Religion Current Sub-function:Religious Structure \:;y Chevrolet Motor Company Building (added 2003 - - #03000277) 3221 Commerce , Dallas Historic Significance:Architecture/Engineering, Event Architect,builder, or engineer:Lang and Witchell, Hughes- O'Rourke Construction Co. Architectural Style:Early Commercial Area of Significance:Industry, Architecture Period of Significance: http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 7 of 21 1950-1974, 1925-1949, 1900- 1924 Owner:Private Historic Function:Government, Industry/Processing/Extraction Historic Sub-function:Government Office, Manufacturing Facility Current Function:Domestic Current Sub-function:Multiple Dwelling Claremont Apartments (added 1995 - - #95000313) Also known as Phase IV--East Dallas DAL/DA 186 4636 Ross Ave. , Dallas Historic Significance:Architecture/Engineering Architectural Style:Mission/Spanish Revival Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Domestic Historic Sub-function:Multiple Dwelling Current Function:Domestic Current Sub-function:Multiple Dwelling :i>, Clements Hall (added 1980 - - #80004087) 3200 Dyer St. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Shepley,Rutan& Coolidge Architectural Style:Other, Colonial Revival Area of Significance:Education, Architecture, Community Planning And Development Period of Significance:1900-1924 Owner:Private Historic Function:Education Historic Sub-function:College Current Function:Education Current Sub-function:College Colonial Hill Historic District (added 1995 - - #95000334) Bounded by Pennsylvania Ave., I-45, US 75 and Hatcher , Dallas http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 8 of 21 Historic Significance:Event, Architecture/Engineering Architectural Style:Bungalow/Craftsman, Classical Revival Area of Significance:Architecture, Community Planning And Development Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Commerce/Trade, Domestic Historic Sub-function:Business, Single Dwelling Current Function:Commerce/Trade, Domestic Current Sub-function:Business, Single Dwelling Continental Gin Company (added 1983 - - #83003134) 3301-3333 Elm St., 212 and 232 Trunk Ave. , Dallas Historic Significance:Architecture/Engineering Architect,builder, or engineer:Buchannon and Guessler, Stevenson,D.L. Architectural Style:Early Commercial Area of Significance:Invention, Architecture, Commerce, Industry Period of Significance: 1900-1924, 1875-1899 Owner:Private Historic Function:Commerce/Trade, Industry/Processing/Extraction Historic Sub-function:Manufacturing Facility, Warehouse Current Function:Commerce/Trade, Industry/Processing/Extraction Current Sub-function:Manufacturing Facility, Warehouse . Dallas County Courthouse (added 1976 - - #76002019) Houston and Commerce Sts. , Dallas Historic Significance:Architecture/Engineering Architect,builder, or engineer:Orlopp& Kusener Architectural Style:Romanesque Area of Significance:Architecture Period of Significance:1875-1899 Owner:Local Historic Function:Government Historic Sub-function:Courthouse Current Function:Government http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas C... Page 9 of 21 Dallas Downtown Historic District (added 2006 - - #04000894) Roughly bounded by Federal, N. St. Paul, Pacific, Harwood, S. Pearl, Commerce, S Ervay, Akard, Commerce and Field , Dallas Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:et.al.,Ahlschlager, Walter Architectural Style:Late 19th And 20th Century Revivals, Late Victorian Area of Significance:Commerce, Community Planning And Development, Architecture Period of Significance:1950-1974, 1925-1949, 1900- 1924, 1875-1899 Owner:Local,Private Historic Function:Commerce/Trade, Government, Landscape, Recreation And Culture Historic Sub-function:Business, City Hall, Financial Institution, Park, Plaza, Post Office,Theater Current Function:Commerce/Trade, Government, Landscape, Recreation And Culture, Religion,Vacant/Not In Use, Work In Progress Current Sub-function:Business, City Hall, Financial Institution, Park, Plaza, Religious Structure, Theater Dallas Downtown Historic District (Boundary Increase) (added 2009 - - #08001299) Bounded by Jackson, North Hardwood Commerce, N.-S. line between S. Pearl Exwy., and S. Hardwood Canton , Dallas Historic Significance:Architecture/Engineering, Event Architect,builder, or engineer:et al.,Ahlschlager, Walter Architectural Style:Late 19th And Early 20th Century American Movements, Modern Movement Area of Significance:Commerce, Architecture Period of Significance:1950-1974, 1925-1949, 1900- 1924 http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 10 of 21 Owner:Private , Local Historic Function:Commerce/Trade, Government, Industry/Processing/Extraction, Religion, Social Historic Sub-function:Business, Government Office, Manufacturing Facility, Meeting Hall, Organizational, Religious Structure, Specialty Store Current Function:Commerce/Trade, Government, Industry/Processing/Extraction, Religion, Social, Vacant/Not In Use Current Sub-function:Business, Energy Facility, Government Office, Meeting Hall, Organizational, Religious Structure, Warehouse Dallas Fire Station No. 16 (added 1997 - - #97000363) 5501 Columbia Ave. , Dallas Historic Significance:Architecture/Engineering, Event Architect,builder, or engineer:Johnson,G.G., Overbeck,H.A. Architectural Style:Mission/Spanish Revival, Prairie School Area of Significance:Architecture, Community Planning And Development Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Government Historic Sub-function:Fire Station Current Function:Recreation And Culture Current Sub-function:Museum .E1:::. Dallas Hall (added 1978 - - #78002913) Southern Methodist University campus , Dallas Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:Shepley,Rutan& Coolidge Architectural Style:Other, Colonial Revival Area of Significance:Education,Architecture Period of Significance:1900-1924 http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 11 of 21 Owner:Private Historic Function:Education Historic Sub-function:College Current Function:Education Current Sub-function:College • Dallas High School Historic District (added 1996 - - #96000035) Also known as Dallas Technical High School;Norman Robert Crozier Technical 2218 Bryan St. , Dallas Historic Significance:Event Area of Significance:Education Period of Significance:1950-1974, 1925-1949, 1900-1924 Owner:Local Historic Function:Education Historic Sub-function:School Current Function:Vacant/Not In Use . Dallas National Bank (added 2005 - - #05000419) 1530 Main and 1511 Commerce St. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Coburn, Smith& Evans, Hexter& Chambers Architectural Style:Skyscraper, Gothic Revival Area of Significance:Economics, Architecture Period of Significance:1950-1974, 1925-1949 Owner:Private Historic Function:Commerce/Trade Historic Sub-function:Business Current Function:Work In Progress ` Dallas Scottish Rite Temple (added 1980 - - #80004088) Harwood and Young Sts. , Dallas Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:Hubble,B.H., Greene,H.M. Architectural Style:Beaux Arts Area of Significance:Architecture, Social History Period of Significance:1900-1924 Owner:Private http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 12 of 21 Historic Function:Social Historic Sub-function:Clubhouse Current Function:Social Current Sub-function:Clubhouse y Dallas Tent and Awning Building (added 1999 - - #99001292) Also known as Murray Building 3401 Commerce St. , Dallas Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:Jordon, J.M. Architectural Style:Early Commercial Area of Significance:Architecture, Industry Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Industry/Processing/Extraction Historic Sub-function:Manufacturing Facility Current Function:Domestic Current Sub-function:Multiple Dwelling y Dallas Times Herald Pasadena Perfect Home (added 2006 - - #06000819) 6938 Wildgrove Ave. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Thomas, Arthur E., et.al. Architectural Style:Tudor Revival Area of Significance:Community Planning And Development, Architecture Period of Significance:1925-1949 Owner:Private Historic Function:Domestic Historic Sub-function:Secondary Structure, Single Dwelling Current Function:Domestic Current Sub-function:Secondary Structure, Single Dwelling Dallas Union Terminal (added 1975 - - #75001966) 400 S. Houston St. , Dallas Historic Significance:Event, Architecture/Engineering http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 13 of 21 Architect, builder, or engineer:Hunt,Jarvis Architectural Style:Beaux Arts Area of Significance:Transportation, Architecture Period of Significance:1900-1924 Owner:Local Historic Function:Transportation Historic Sub-function:Rail-Related Current Function:Transportation Current Sub-function:Rail-Related DeGolyer Estate (added 1978 - - #78002914) Also known as Everette DeGolyer House (Rancho Encinal) 8525 Garland Rd. , Dallas Historic Significance:Person,Event, Architecture/Engineering Architect,builder, or engineer:Schutt,Burton, Scott,Denman Architectural Style:Other, Mission/Spanish Revival Historic Person:DeGolyer,Everette Significant Year:1938, 1940 Area of Significance:Science,Architecture, Landscape Architecture Period of Significance:1925-1949 Owner:Local Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Landscape Current Sub-function:Park Dealey Plaza Historic District (added 1993 - - #93001607) Roughly bounded by Pacific Ave., Market St., Jackson St. and right of way of Dallas Right of Way Management Company , Dallas Historic Significance:Event, Person, Architecture/Engineering Architect, builder, or engineer:Multiple Architectural Style:Romanesque, Chicago, Early Commercial Historic Person:Kennedy,John F.,et al. Significant Year:1963 Area of Significance: http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 14 of 21 Architecture, Landscape Architecture, Politics/Government Period of Significance:1950-1974, 1925-1949, 1900- 1924, 1875-1899 Owner:Mixed Historic Function:Domestic, Government, Landscape Historic Sub-function:Government Office, Plaza, Single Dwelling Current Function:Domestic, Government, Landscape Current Sub-function:Government Office, Plaza, Single Dwelling y Dixon--Moore House (added 1995 - - #95000320) Also known as Phase IV--East Dallas DAL/DA 96 (South) 2716 Peabody , Dallas Historic Significance:Architecture/Engineering Architectural Style:Other Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Domestic Current Sub-function:Single Dwelling Ry Ellis, James H. and Molly, House (added 1995 - - #95000323) Also known as Phase IV--East Dallas DAL/DA 1302 2426 Pine , Dallas Historic Significance:Architecture/Engineering Architectural Style:Other Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Domestic Historic Sub-function:Secondary Structure, Single Dwelling Current Function:Domestic Current Sub-function:Secondary Structure, Single Dwelling http://nationalregisterothistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 15 of 21 Emanuel Lutheran Church (added 1995 - - #95000315) Also known as Phase IV--East Dallas DAL/DA 194 4301 San Jacinto , Dallas Historic Significance:Architecture/Engineering Architectural Style:Late Gothic Revival Area of Significance:Architecture Period of Significance:1925-1949 Owner:Private Historic Function:Religion Historic Sub-function:Religious Structure Current Function:Religion Current Sub-function:Religious Structure Fannin, James W., Elementary School (added 1995 - - #95000314) Also known as Phase IV--East Dallas DAL/DA 185 4800 Ross Ave. , Dallas Historic Significance:Architecture/Engineering Architect, builder, or engineer:Lang& Witchell Architectural Style:Late Gothic Revival Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Education Historic Sub-function:School Current Function:Education Current Sub-function:School V. Fidelity Union Life Insurance Building (added 2009 - - #09000306) Also known as Fidelity Union Life 1511 Bryan and 1507 Pacific Ave. , Dallas Historic Significance:Event Area of Significance:Commerce Period of Significance:1950-1974 Owner:Private Historic Function:Commerce/Trade Historic Sub-function:Business Current Function:Domestic Current Sub-function:Multiple Dwelling http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 16 of 21 ;1y Florence, Fred, Hall (added 1980 - - #80004089) 3330 University Blvd. , Dallas Historic Significance:Event, Architecture/Engineering Architect,builder, or engineer:DeWitt& Lemmon Architectural Style:Other, Colonial Revival Area of Significance:Education, Architecture, Community Planning And Development Period of Significance:1900-1924 Owner:Private Historic Function:Education Historic Sub-function:College Current Function:Education Current Sub-function:College Forest Avenue High School, Old (added 1995 - - #95000318) Also known as Madison,James,High School;Phase IV--East Dallas DAL/DA 49 3000 Martin Luther King, Jr., Blvd. , Dallas Historic Significance:Architecture/Engineering Architect,builder, or engineer:Ittner, W.P. Architectural Style:Renaissance Area of Significance:Architecture Period of Significance:1900-1924 Owner:Private Historic Function:Education Historic Sub-function:School Current Function:Education Current Sub-function:School G & J Manufacturing (added 2002 - - #02000992) 3912 Willow St. , Dallas Historic Significance:Event Area of Significance:Education, Industry Period of Significance:1950-1974, 1925-1949 Owner:Private Historic Function:Industry/Processing/Extraction Historic Sub-function:Manufacturing Facility Current Function:Commerce/Trade Current Sub-function:Business http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 17 of 21 Gilbert, Samuel and Julia, House (added 1988 - - #88002063) Also known as The Gilbert Homestead;The Old Rock House 2540 Farmers Branch Ln. , Farmers Branch Historic Significance:Information Potential, Architecture/Engineering Architect,builder, or engineer:Unknown Architectural Style:Other, Greek Revival Area of Significance:Historic -Non-Aboriginal, Architecture Cultural Affiliation:Anglo-American Period of Significance:1925-1949, 1900-1924, 1875- 1899, 1850-1874 Owner:Local Historic Function:Domestic Historic Sub-function:Single Dwelling Current Function:Landscape, Recreation And Culture Current Sub-function:Museum, Park $. Goodyear Tire and Rubber Company Building and B.F. Goodrich Building (added 2002 - - #02000009) Also known as Howard R. Wolf Building 2809 Parry Ave. and 4136-40 Commerce St. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:F.J. Woerner& Company Architectural Style:Chicago Area of Significance:Industry,Architecture Period of Significance:1950-1974, 1925-1949 Owner:Private Historic Function:Agriculture/Subsistence, Commerce/Trade Historic Sub-function:Business, Warehouse Current Function:Commerce/Trade, Domestic Current Sub-function:Multiple Dwelling, Professional y Grace Methodist Episcopal Church (added 1982 - - #82001736) Also known as Grace United Methodist Church 4105 Junius St. , Dallas http://nationalregisterothistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 18 of 21 Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Caan,W. A. Architectural Style:Gothic Revival Area of Significance:Architecture, Religion Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Religion Historic Sub-function:Religious Structure Current Function:Religion Current Sub-function:Religious Structure Greenway Parks Historic District (added 2008 - - #07001383) Bounded by W. Mockingbird Ln., W. University Blvd., Inwood & N. Dallas Tollway. , Dallas Historic Significance:Event, Architecture/Engineering Architect, builder, or engineer:Allen, George, et.al. Architectural Style:Modern Movement, Late 19th And 20th Century Revivals Area of Significance:Architecture, Community Planning And Development Period of Significance:1950-1974, 1925-1949 Owner:Private Historic Function:Domestic, Landscape Historic Sub-function:Park, Single Dwelling Current Function:Domestic, Landscape Current Sub-function:Park, Single Dwelling Greer, George C., House (added 1997 - - #96001563) Also known as Greer-Saner-McCutcheon House;See also:Swiss Avenue Historic 5439 Swiss Ave. , Dallas Historic Significance:Architecture/Engineering Architect, builder, or engineer:Thompson, Hal B. Architectural Style:Colonial Revival Area of Significance:Architecture Period of Significance: 1925-1949, 1900-1924 Owner:Private Historic Function:Domestic Historic Sub-function:Secondary Structure, Single Dwelling Current Function:Domestic http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 19 of 21 Current Sub-function:Secondary Structure, Single Dwelling Gulf Oil Distribution Facility (added 2010 - - #10000144) Also known as Hickory Street Annex 501 Second Ave , Dallas Historic Significance:Event Area of Significance:Industry Period of Significance:1950-1974, 1925-1949, 1900-1924 Owner:Private Historic Function:Industry/Processing/Extraction Current Function:Commerce/Trade Current Sub-function:Business Harlan Building (added 2004 - - #04000102) 2018 Cadiz St. , Dallas Historic Significance:Event Area of Significance:Commerce Period of Significance:1925-1949, 1900-1924 Owner:Private Historic Function:Commerce/Trade Historic Sub-function:Warehouse Current Function:Work In Progress Hawkes, Z. T. (Tip), House (added 1985 - - #85000712) 132 N. Potter St. , Cedar Hill Historic Significance:Architecture/Engineering Architect,builder, or engineer:Unknown Architectural Style:Other Area of Significance:Architecture Period of Significance:1875-1899 Owner:Private Historic Function:Domestic Historic Sub-function:Secondary Structure, Single Dwelling Current Function:Domestic Current Sub-function:Secondary Structure, Single Dwelling Highland Park Shopping Village (added 1997 - - #97001393) http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 20 of 21 Also known as Highland Park Village Jct. of Preston Rd. and Mockingbird Ln. , Highpark Historic Significance:Architecture/Engineering, Event Architect, builder, or engineer:multiple Architectural Style:Mission/Spanish Revival, Colonial Revival Area of Significance:Commerce, Community Planning And Development, Architecture Period of Significance:1950-1974, 1925-1949 Owner:Private Historic Function:Commerce/Trade Historic Sub-function:Department Store, Specialty Store Current Function:Commerce/Trade Current Sub-function:Department Store, Specialty Store Page 1 > 2> 3 Return to Top Select a Different TEXAS County (map) Anderson Andrews Angelina Aransas Archer Armstrong Atascosa Austin Bandera Bastrop Bee Bell Bexar Blanco Bosque Bowie Brazoria Brazos Brewster Briscoe Brown Burleson Burnet Caldwell Calhoun Callahan Cameron Carson Cass Chambers Cherokee Clay Coke Collin Collingsworth Colorado Comal Concho Cooke Coryell Cottle Crockett Crosby Culberson Dallam Dallas Dawson De Witt Deaf Smith Denton Dickens Dimmit Donley Eastland Ector Edwards El Paso Ellis Erath Falls Fannin Fayette Fisher Floyd Fort Bend Franklin Freestone Frio Galveston Garza Gillespie Goliad Gonzales Gray Grayson Gregg Grimes Guadalupe Hale Hall Hamilton Hardeman Hardin Harris Harrison Hartley Hays Hemphill Henderson Hidalgo Hill Hood Hopkins Houston Howard Hudspeth Hunt Hutchinson Irion Jack Jackson Jasper Jeff Davis Jefferson Jim Wells Johnson Jones Karnes Kaufman Kendall Kenedy Kent Kerr Kimble Kinney Kleberg Knox La Salle Lamar Lampasas Lavaca Lee Leon Liberty Limestone Lipscomb Live Oak Llano Loving Lubbock Lynn Madison Marion Martin Mason Matagorda Maverick McCulloch McLennan McMullen Medina Menard Midland Milam Mills Mitchell Montague Montgomery Morris Motley Nacogdoches Navarro Newton Nolan Nueces Ochiltree Oldham Orange Palo Pinto Panola Parker Pecos Polk Potter Presidio Rains Randall Reagan Real Red River Refugio Roberts Robertson Rockwall Runnels Rusk Sabine San Augustine San Jacinto San Patricio San Saba Schleicher Shackelford Shelby Smith Somervell Starr Stephens Sutton Tarrant Taylor Terrell Throckmorton Titus Tom Green Travis Trinity Tyler Upshur Uvalde Val Verde Van Zandt Victoria Walker Waller Washington Webb Wharton Wheeler Wichita Wilbarger Willacy Williamson Wilson Winkler Wise Wood Young Zapata -14/1/I Select a Different State (map) Alabama Alaska Arizona Arkansas California Colorado Connecticut Delaware District Of Columbia Florida Georgia Hawaii Idaho Illinois Indiana Iowa Kansas Kentucky Louisiana Maine Maryland Massachusetts Michigan Minnesota Mississippi Missouri Montana Nebraska Nevada New Hampshire New Jersey New Mexico New York http://nationalregisterothistoricplaces.com/tx/Dallas/state.html 1/18/2014 National Register of Historical Places - TEXAS (TX), Dallas ... Page 21 of 21 North Carolina North Dakota Ohio Oklahoma Oregon Pennsylvania Rhode Island South Carolina South Dakota Tennessee Texas Utah Vermont Virginia Washington West Virginia Wisconsin Wyoming . 44/ Return to Home Page Frequently Ask Questions American Dreams Inc.,the developers of this web site;nationalregisterofhistoricalplaces.com,is not Register Forms affiliated in any way with the U.S.Dept.of Interior,the National Park Service,or the National Register of Historic Places Property Updates I Add Link Enhanced Listings I Contact Us http://nationalregisterofhistoricplaces.com/tx/Dallas/state.html 1/18/2014 Attachment 11 Endangered Species for Dallas County, Texas Texas Parks&Wildlife Dept. Page 1 of 4 Annotated County Lists of Rare Species Last Revision:8/17/2011 6:19:00 PM DALLAS COUNTY BIRDS Federal Status State Status American Peregrine Falcon Falco peregrinus anatum DL T year-round resident and local breeder in west Texas,nests in tall cliff eyries; also, migrant across state from more northern breeding areas in US and Canada,winters along coast and farther south; occupies wide range of habitats during migration, including urban, concentrations along coast and barrier islands; low-altitude migrant, stopovers at leading landscape edges such as lake shores,coastlines,and barrier islands. Arctic Peregrine Falcon Falco peregrinus tundrius DL migrant throughout state from subspecies' far northern breeding range,winters along coast and farther south; occupies wide range of habitats during migration, including urban, concentrations along coast and barrier islands; low-altitude migrant, stopovers at leading landscape edges such as lake shores, coastlines, and barrier islands. Bald Eagle Haliaeetus leucocephalus DL T found primarily near rivers and large lakes; nests in tall trees or on cliffs near water; communally roosts, especially in winter; hunts live prey, scavenges,and pirates food from other birds Black-capped Vireo Vireo atricapilla LE E oak juniper woodlands with distinctive patchy,two-layered aspect; shrub and tree layer with open,grassy spaces;requires foliage reaching to ground level for nesting cover; return to same territory, or one nearby, year after year; deciduous and broad-leaved shrubs and trees provide insects for feeding; species composition less important than presence of adequate broad-leaved shrubs, foliage to ground level, and required structure;nesting season March-late summer Golden-cheeked Warbler Setophaga chrysoparia LE E juniper-oak woodlands; dependent on Ashe juniper(also known as cedar) for long fine bark strips,only available from mature trees,used in nest construction;nests are placed in various trees other than Ashe juniper; only a few mature junipers or nearby cedar brakes can provide the necessary nest material; forage for insects in broad-leaved trees and shrubs; nesting late March-early summer Henslow's Sparrow Ammodramus henslowii wintering individuals (not flocks) found in weedy fields or cut-over areas where lots of bunch grasses occur along with vines and brambles; a key component is bare ground for running/walking Interior Least Tern Sterna antillarum athalassos LE E subspecies is listed only when inland(more than 50 miles from a coastline);nests along sand and gravel bars within braided streams,rivers; also know to nest on man-made structures (inland beaches,wastewater treatment plants, gravel mines, etc); eats small fish and crustaceans,when breeding forages within a few hundred feet of colony Peregrine Falcon Falco peregrinus DL T Texas Parks&Wildlife Dept. Page 2 of 4 Annotated County Lists of Rare Species DALLAS COUNTY BIRDS Federal Status State Status both subspecies migrate across the state from more northern breeding areas in US and Canada to winter along coast and farther south; subspecies (F. p. anatum)is also a resident breeder in west Texas; the two subspecies' listing statuses differ,F.p. tundrius is no longer listed in Texas;but because the subspecies are not easily distinguishable at a distance,reference is generally made only to the species level; see subspecies for habitat. Piping Plover Charadrius melodus LT T wintering migrant along the Texas Gulf Coast;beaches and bayside mud or salt flats Sprague's Pipit Anthus spragueii C only in Texas during migration and winter,mid September to early April; short to medium distance, diurnal migrant; strongly tied to native upland prairie, can be locally common in coastal grasslands,uncommon to rare further west; sensitive to patch size and avoids edges. Western Burrowing Owl Athene cunicularia hypugaea open grasslands, especially prairie,plains, and savanna, sometimes in open areas such as vacant lots near human habitation or airports; nests and roosts in abandoned burrows White-faced Ibis Plegadis chihi T prefers freshwater marshes, sloughs, and irrigated rice fields,but will attend brackish and saltwater habitats; nests in marshes, in low trees, on the ground in bulrushes or reeds, or on floating mats Whooping Crane Grus americana LE E potential migrant via plains throughout most of state to coast; winters in coastal marshes of Aransas, Calhoun, and Refugio counties Wood Stork Mycteria americana T forages in prairie ponds, flooded pastures or fields,ditches, and other shallow standing water, including salt- water;usually roosts communally in tall snags, sometimes in association with other wading birds(i.e. active heronries); breeds in Mexico and birds move into Gulf States in search of mud flats and other wetlands, even those associated with forested areas; formerly nested in Texas,but no breeding records since 1960 INSECTS Federal Status State Status Black Lordithon rove beetle Lordithon niger historically known from Texas MAMMALS Federal Status State Status Cave myotis bat Myotis velifer colonial and cave-dwelling; also roosts in rock crevices,old buildings, carports,under bridges,and even in abandoned Cliff Swallow(Hirundo pyrrhonota)nests; roosts in clusters of up to thousands of individuals; hibernates in limestone caves of Edwards Plateau and gypsum cave of Panhandle during winter; opportunistic insectivore Plains spotted skunk Spilogale putorius interrupta Texas Parks&Wildlife Dept. Page 3 of 4 Annotated County Lists of Rare Species DALLAS COUNTY MAMMALS Federal Status State Status catholic; open fields,prairies, croplands, fence rows, farmyards, forest edges, and woodlands;prefers wooded,brushy areas and tallgrass prairie MOLLUSKS Federal Status State Status Fawnsfoot Truncilla donaciformis small and large rivers especially on sand, mud,rocky mud, and sand and gravel, also silt and cobble bottoms in still to swiftly flowing waters; Red(historic), Cypress (historic), Sabine(historic),Neches,Trinity, and San Jacinto River basins. Little spectaclecase Villosa lienosa creeks,rivers, and reservoirs, sandy substrates in slight to moderate current,usually along the banks in slower currents; east Texas, Cypress through San Jacinto River basins Louisiana pigtoe Pleurobema riddellii T streams and moderate-size rivers,usually flowing water on substrates of mud, sand, and gravel; not generally known from impoundments; Sabine,Neches, and Trinity(historic)River basins Texas heelsplitter Potamilus amphichaenus T quiet waters in mud or sand and also in reservoirs. Sabine,Neches,and Trinity River basins Wabash pigtoe Fusconaia(lava creeks to large rivers on mud, sand, and gravel from all habitats except deep shifting sands; found in moderate to swift current velocities; east Texas River basins,Red through San Jacinto River basins; elsewhere occurs in reservoirs and lakes with no flow REPTILES Federal Status State Status Alligator snapping turtle Macrochelys temminckii T perennial water bodies; deep water of rivers, canals, lakes, and oxbows; also swamps,bayous, and ponds near deep running water; sometimes enters brackish coastal waters;usually in water with mud bottom and abundant aquatic vegetation; may migrate several miles along rivers; active March-October; breeds April- October Texas garter snake Thamnophis sirtalis annectens wet or moist microhabitats are conducive to the species occurrence,but is not necessarily restricted to them; hibernates underground or in or under surface cover;breeds March-August Texas horned lizard Phrynosoma cornutum T open, arid and semi-arid regions with sparse vegetation, including grass,cactus, scattered brush or scrubby trees; soil may vary in texture from sandy to rocky;burrows into soil, enters rodent burrows, or hides under rock when inactive; breeds March-September Timber/Canebrake Crotalus horridus T rattlesnake Texas Parks&Wildlife Dept. Page 4 of 4 Annotated County Lists of Rare Snecies DALLAS COUNTY REPTILES Federal Status State Status swamps, floodplains,upland pine and deciduous woodlands, riparian zones, abandoned farmland; limestone bluffs, sandy soil or black clay;prefers dense ground cover, i.e. grapevines or palmetto PLANTS Federal Status State Status Glen Rose yucca Yucca necopina Texas endemic; grasslands on sandy soils and limestone outcrops; flowering April-June Warnock's coral-root Hexalectris warnockii in leaf litter and humus in oak-juniper woodlands on shaded slopes and intermittent,rocky creekbeds in canyons; in the Trans Pecos in oak-pinyon-juniper woodlands in higher mesic canyons(to 2000 m [6550 ft]),primarily on igneous substrates; in Terrell County under Quercus fusiformis mottes on terrraces of spring-fed perennial streams, draining an otherwise rather xeric limestone landscape; on the Callahan Divide (Taylor County),the White Rock Escarpment(Dallas County), and the Edwards Plateau in oak juniper woodlands on limestone slopes; in Gillespie County on igneous substrates of the Llano Uplift; flowering June-September; individual plants do not usually bloom in successive years Attachment 12 TPDES General Permit (Permit No. TXR 150000) Texas Commission on Environmental Quality P.O.Box 13087,Austin,Texas 78711-3087 > .> 11I . GENERAL PERMIT TO DISCHARGE UNDER THE TEXAS POLLUTANT DISCHARGE ELIMINATION SYSTEM under provisions of Section 402 of the Clean Water Act and Chapter 26 of the Texas Water Code This permit supersedes and replaces TPDES General Permit No.TXRtS0000,issued March 5,2008 Construction sites that discharge stormwater associated with construction activity located in the state of Texas may discharge to surface water in the state only according to monitoring requirements and other conditions set forth in this general permit,as well as the rules of the Texas Commission on Environmental Quality(TCEQ or Commission),the laws of the State of Texas,and other orders of the Commission of the TCEQ. The issuance of this general permit does not grant to the permittee the right to use private or public property for conveyance of stormwater and certain non-stormwater discharges along the discharge route. This includes property belonging to but not limited to any individual,partnership, corporation or other entity. Neither does this general permit authorize any invasion of personal rights nor any violation of federal,state,or local laws or regulations. It is the responsibility of the permittee to acquire property rights as may be necessary to use the discharge route. This general permit and the authorization contained herein shall expire at midnight,five years from the permit effective date. • EFFECTIVE DATE: March 5, 2013 ISSUED DATE: FEB i 9 2013 � ��, i l� For Construction General Permit TPDES General Permit TXRi50000 TPDES GENERAL PERMIT NUMBER TXRi50000 RELATING TO STORMWATER DISCHARGES ASSOCIATED WITH CONSTRUCTION ACTIVITIES Table of Contents Part I. Flow Chart and Definitions 5 Section A. Flow Chart to Determine Whether Coverage is Required 5 Section B. Definitions 6 Part II. Permit Applicability and Coverage 12 Section A. Discharges Eligible for Authorization 12 1. Stormwater Associated with Construction Activity 12 2. Discharges of Stormwater Associated with Construction Support Activities 12 3. Non-Stormwater Discharges 12 4. Other Permitted Discharges 13 Section B. Concrete Truck Wash Out 13 Section C. Limitations on Permit Coverage 13 1. Post Construction Discharges 13 2. Prohibition of Non-Stormwater Discharges 13 3. Compliance With Water Quality Standards 13 4. Impaired Receiving Waters and Total Maximum Daily Load(TMDL) Requirements 14 5. Discharges to the Edwards Aquifer Recharge or Contributing Zone 14 6. Discharges to Specific Watersheds and Water Quality Areas 14 7. Protection of Streams and Watersheds by Other Governmental Entities 14 8. Indian Country Lands 14 9. Oil and Gas Production 15 10. Stormwater Discharges from Agricultural Activities 15 11. Endangered Species Act 15 12. Other 15 Section D. Deadlines for Obtaining Authorization to Discharge 15 1. Large Construction Activities 15 2. Small Construction Activities 15 Section E. Obtaining Authorization to Discharge i6 1. Automatic Authorization for Small Construction Activities With Low Potential for Erosion. 16 2. Automatic Authorization For All Other Small Construction Activities: 17 3. Authorization for Large Construction Activities: 17 Page 2 Construction General Permit TPDES General Permit TXRi50000 4. Waivers for Small Construction Activities- 18 5. Effective Date of Coverage 18 6. Notice of Change (NOC) 18 7. Signatory Requirement for NOI Forms,Notice of Termination(NOT) Forms,NOC Letters, and Construction Site Notices 19 8. Contents of the NOI 19 Section F. Terminating Coverage 20 1. Notice of Termination(NOT) Required 20 2. Minimum Contents of the NOT 20 3. Termination of Coverage for Small Construction Sites and for Secondary Operators at Large Construction Sites 20 4. Transfer of Operational Control 21 Section G. Waivers from Coverage 21 1. Waiver Applicability and Coverage 22 2. Steps to Obtaining a Waiver 22 3. Effective Date of Waiver 22 4. Activities Extending Beyond the Waiver Period 22 Section H. Alternative TPDES Permit Coverage 23 1. Individual Permit Alternative 23 2. Individual Permit Required 23 3. Alternative Discharge Authorization 23 Section I. Permit Expiration �3 Part III. Stormwater Pollution Prevention Plans(SWP3) 24 Section A. Shared SWP3 Development 24 Section B. Responsibilities of Operators 25 1. Secondary Operators and Primary Operators with Control Over Construction Plans and Specifications 25 2. Primary Operators with Day-to-Day Operational Control 25 Section C. Deadlines for SWP3 Preparation, Implementation, and Compliance 25 Section D. Plan Review and Making Plans Available 26 Section E. Revisions and Updates to SWP3s 26 Section F. Contents of SWP3 26 Section G. Erosion and Sediment Control Requirements Applicable to All Sites 34 Part W. Stormwater Runoff from Concrete Batch Plants 35 Section A. Benchmark Sampling Requirements 35 Section B. Best Management Practices (BMPs) and SWP3 Requirements 37 Section C. Prohibition of Wastewater Discharges 39 Page 3 Construction General Permit TPDES General Permit TXRi50000 Part V. Concrete Truck Wash Out Requirements 40 Part VI. Retention of Records 40 Part VII.Standard Permit Conditions 40 Part VIII. Fees 41 Appendix A: Automatic Authorization 43 Appendix B: Erosivity Index(EI) Zones in Texas 45 Appendix C: Isoerodent Map 46 Appendix D: Erosivity Indices for EI Zones in Texas 47 Page 4 Construction General Permit TPDES General Permit TX11150000 Part I. Flow Chart and Definitions Section A. Flow Chart to Determine Whether Coverage is Required How much land Iv ill be disturbed?(*1) < 1 acre (*1) ----------L-)1 or more acres (*1) ---___ NO Do you meet the ),(:S Will 5 or more's, .4-- definition of l• acres be disturbed? -opei atorr(*2) (*1) A 0 YES I- 'N Permit Co's erne Reauired a Prepare and Implement SWP3 • Post Site Notice • Submit Copy of Site Notice to MS4 Operator w %., . tAre you a"primary NO operator?"(*2) / "■ 1ES Permit Coverage Not Required,Unless Part i Permit Coverage Required of a Larger Common • Prepare and Implement SW P3 Plan of Rev elopment • Submit NO1 to TIE Q or Sale • Post Site Notice \. ../ • Submit Copy of NO1 to MS4 Operator ■... ../ (*I) To determine the size of the construction project,use the size of the entire area to be disturbed,and include the size of the larger common plan of development or sale,i f the project is part of a larger project(refer to Part 1.13., "Definitions,"for an explanation of"common plan of development or sale"). (*2) Refer to the definitions for"operator,""primary operator,"and"secondary operator"in Part 1., Section 8.of this permit. Page 5 Construction General Permit TPDES General Permit TXRi50000 Section B. Definitions Arid Areas -Areas with an average annual rainfall of o to io inches. Best Management Practices(BMPs) -Schedules of activities,prohibitions of practices, maintenance procedures,structural controls,local ordinances, and other management practices to prevent or reduce the discharge of pollutants. BMPs also include treatment requirements, operating procedures, and practices to control construction site runoff, spills or leaks,waste disposal, or drainage from raw material storage areas. Commencement of Construction-The initial disturbance of soils associated with clearing, grading, or excavation activities, as well as other construction-related activities (e.g.,stockpiling of fill material, demolition). Common Plan of Development-A construction activity that is completed in separate stages, separate phases, or in combination with other construction activities. A common plan of development(also known as a"common plan of development or sale") is identified by the documentation for the construction project that identifies the scope of the project, and may include plats,blueprints, marketing plans, contracts,building permits, a public notice or hearing, zoning requests, or other similar documentation and activities. A common plan of development does not necessarily include all construction projects within the jurisdiction of a public entity(e.g.,a city or university). Construction of roads or buildings in different parts of the jurisdiction would be considered separate"common plans,"with only the interconnected parts of a project being considered part of a"common plan" (e.g., a building and its associated parking lot and driveways, airport runway and associated taxiways, a building complex, etc.). Where discrete construction projects occur within a larger common plan of development or sale but are located 1/4 mile or more apart, and the area between the projects is not being disturbed, each individual project can be treated as a separate plan of development or sale,provided that any interconnecting road,pipeline or utility project that is part of the same"common plan"is not included in the area to be disturbed. Construction Activity-Includes soil disturbance activities, including clearing, grading, and excavating; and does not include routine maintenance that is performed to maintain the original line and grade, hydraulic capacity, or original purpose of the site(e.g., the routine grading of existing dirt roads, asphalt overlays of existing roads,the routine clearing of existing right-of-ways, and similar maintenance activities). Regulated construction activity is defined in terms of small and large construction activity. Dewatering—The act of draining rainwater or groundwater from building foundations, vaults, and trenches. Discharge— For the purposes of this permit,the drainage,release, or disposal of pollutants in stormwater and certain non-stormwater from areas where soil disturbing activities(e.g., clearing,grading, excavation, stockpiling of fill material, and demolition),construction materials or equipment storage or maintenance(e.g.,fill piles,borrow area, concrete truck wash out,fueling), or other industrial stormwater directly related to the construction process (e.g., concrete or asphalt batch plants)are located. Drought-Stricken Area— For the purposes of this permit, an area in which the National Oceanic and Atmospheric Administration's U.S. Seasonal Drought Outlook indicates for the period during which the construction will occur that any of the following conditions are likely: (1) "Drought to persist or intensify", (2) "Drought ongoing, some improvement", (3) "Drought likely to improve, impacts ease", or(4) "Drought development likely". See http://www.cpc.ncep.noaa.gov/productsfexpert assessment/seasonal drought.html. Edwards Aquifer-As defined under Texas Administrative Code (TAC) § 213.3 of this title (relating to the Edwards Aquifer),that portion of an arcuate belt of porous,water-bearing, predominantly carbonate rocks known as the Edwards and Associated Limestones in the Balcones Fault Zone trending from west to east to northeast in Kinney, Uvalde, Medina, Bexar, Comal, Hays,Travis, and Williamson Counties; and composed of the Salmon Peak Page 6 Construction General Permit TPDES General Permit TXRi50000 Limestone, McKnight Formation,West Nueces Formation, Devil's River Limestone, Person Formation, Kainer Formation, Edwards Formation, and Georgetown Formation. The permeable aquifer units generally overlie the less-permeable Glen Rose Formation to the south, overlie the less-permeable Comanche Peak and Walnut Formations north of the Colorado River, and underlie the less-permeable Del Rio Clay regionally. Edwards Aquifer Recharge Zone-Generally,that area where the stratigraphic units constituting the Edwards Aquifer crop out, including the outcrops of other geologic formations in proximity to the Edwards Aquifer,where caves, sinkholes,faults,fractures, or other permeable features would create a potential for recharge of surface waters into the Edwards Aquifer. The recharge zone is identified as that area designated as such on official maps located in the offices of the Texas Commission on Environmental Quality(TCEQ) and the appropriate regional office. The Edwards Aquifer Map Viewer,located at http://www.tceq.texas.gov/compliance/field ops/eapp/mapdisclaimer.html, can be used to determine where the recharge zone is located. Edwards Aquifer Contributing Zone-The area or watershed where runoff from precipitation flows downgradient to the recharge zone of the Edwards Aquifer. The contributing zone is located upstream(upgradient) and generally north and northwest of the recharge zone for the following counties: all areas within Kinney County, except the area within the watershed draining to Segment No. 2304 of the Rio Grande Basin; all areas within Uvalde, Medina, Bexar, and Comal Counties; all areas within Hays and Travis Counties, except the area within the watersheds draining to the Colorado River above a point 1.3 miles upstream from Tom Miller Dam, Lake Austin at the confluence of Barrow Brook Cove, Segment No. 1403 of the Colorado River Basin; and all areas within Williamson County, except the area within the watersheds draining to the Lampasas River above the dam at Stillhouse Hollow reservoir, Segment No. 1216 of the Brazos River Basin.The contributing zone is illustrated on the Edwards Aquifer map viewer at http:/!www.tceq.texas.gov/compliance/field ops/eapp/mapdisclaimer.html. Effluent Limitations Guideline (ELG) — Defined in 4o Code of Federal Regulations (CFR) § 122.2 as a regulation published by the Administrator under§3o4(b)of the Clean Water Act(CWA)to adopt or revise effluent limitations. Facility or Activity— For the purpose of this permit, a construction site or construction support activity that is regulated under this general permit,including all contiguous land and fixtures(for example,ponds and materials stockpiles), structures,or appurtances used at a construction site or industrial site described by this general permit. Final Stabilization-A construction site status where any of the following conditions are met: A. All soil disturbing activities at the site have been completed and a uniform(that is, evenly distributed,without large bare areas)perennial vegetative cover with a density of at least 70% of the native background vegetative cover for the area has been established on all unpaved areas and areas not covered by permanent structures,or equivalent permanent stabilization measures(such as the use of riprap,gabions,or geotextiles)have been employed. B. For individual lots in a residential construction site by either: (1) the homebuilder completing final stabilization as specified in condition(a) above; or (2) the homebuilder establishing temporary stabilization for an individual lot prior to the time of transfer of the ownership of the home to the buyer and after informing the homeowner of the need for, and benefits of, final stabilization. If temporary stabilization is not feasible,then the homebuilder may fulfill this requirement by retaining perimeter controls or BMPs, and informing the homeowner of the need for removal of temporary controls and the establishment of final stabilization. Page 7 Construction General Permit TPDES General Permit TXRi50000 Fullfillment of this requirement must be documented in the homebuilder's stormwater pollution prevention plan(SWP3). C. For construction activities on land used for agricultural purposes (such as pipelines across crop or range land),final stabilization may be accomplished by returning the disturbed land to its preconstruction agricultural use. Areas disturbed that were not previously used for agricultural activities, such as buffer strips immediately adjacent to surface water and areas that are not being returned to their preconstruction agricultural use must meet the final stabilization conditions of condition(a) above. D. In arid, semi-arid,and drought-stricken areas only, all soil disturbing activities at the site have been completed and both of the following criteria have been met: (i) Temporary erosion control measures(for example, degradable rolled erosion control product) are selected, designed,and installed along with an appropriate seed base to provide erosion control for at least three years without active maintenance by the operator, and (2) The temporary erosion control measures are selected, designed, and installed to achieve 70% of the native background vegetative coverage within three years. Hyperchlorination of Waterlines—Treatment of potable water lines or tanks with chlorine for disinfection purposes,typically following repair or partial replacement of the waterline or tank, and subsequently flushing the contents. Impaired Water-A surface water body that is identified on the latest approved CWA §303(d) List as not meeting applicable state water quality standards. Impaired waters include waters with approved or established total maximum daily loads(TMDLs), and those where a TMDL has been proposed by TCEQ but has not yet been approved or established. Indian Country Land— (from 4o CFR§122.2) (i) all land within the limits of any Indian reservation under the jurisdiction of the United States government, notwithstanding the issuance of any patent, and, including rights-of-way running through the reservation; (2) all dependent Indian communities with the borders of the United States whether within the originally or subsequently acquired territory thereof, and whether within or without the limits of a state; and(3) all Indian allotments,the Indian titles to which have not been extinguished, including rights-of-way running through the same. Indian Tribe-(from 4o CFR§122.2)any Indian Tribe,band, group, or community recognized by the Secretary of the Interior and exercising governmental authority over a Federal Indian Reservation. Large Construction Activity-Construction activities including clearing, grading, and excavating that result in land disturbance of equal to or greater than five(5) acres of land. Large construction activity also includes the disturbance of less than five(5) acres of total land area that is part of a larger common plan of development or sale if the larger common plan will ultimately disturb equal to or greater than five(5) acres of land. Large construction activity does not include routine maintenance that is performed to maintain the original line and grade, hydraulic capacity, or original purpose of the site(for example,the routine grading of existing dirt roads, asphalt overlays of existing roads,the routine clearing of existing right-of-ways,and similar maintenance activities.) Linear Project— Includes the construction of roads,bridges, conduits, substructures, pipelines, sewer lines,towers,poles,cables,wires, connectors, switching,regulating and transforming equipment and associated ancillary facilities in a long, narrow area. Minimize-To reduce or eliminate to the extent achievable using stormwater controls that are technologically available and economically practicable and achievable in light of best industry practices. Page 8 Construction General Permit TPDES General Permit TXRi50000 Municipal Separate Storm Sewer System(MS4) -A separate storm sewer system owned or operated by the United States, a state,city,town, county, district, association, or other public body(created by or pursuant to state law)having jurisdiction over the disposal of sewage, industrial wastes, stormwater, or other wastes,including special districts under state law such as a sewer district,flood control or drainage district,or similar entity, or an Indian tribe or an authorized Indian tribal organization,that discharges to surface water in the state. Notice of Change (NOC) —Written notification to the executive director from a discharger authorized under this permit, providing changes to information that was previously provided to the agency in a notice of intent form. Notice of Intent(NOI)-A written submission to the executive director from an applicant requesting coverage under this general permit. Notice of Termination(NOT) -A written submission to the executive director from a discharger authorized under a general permit requesting termination of coverage. Operator-The person or persons associated with a large or small construction activity that is either a primary or secondary operator as defined below: Primary Operator—the person or persons associated with a large or small construction activity that meets either of the following two criteria: (a) the person or persons have on-site operational control over construction plans and specifications, including the ability to make modifications to those plans and specifications; or (b) the person or persons have day-to-day operational control of those activities at a construction site that are necessary to ensure compliance with a Storm Water Pollution Prevention Plan(SWP3)for the site or other permit conditions (for example,they are authorized to direct workers at a site to carry out activities required by the SWP3 or comply with other permit conditions). Secondary Operator—The person or entity, often the property owner,whose operational control is limited to: (a) the employment of other operators, such as a general contractor,to perform or supervise construction activities; or (b) the ability to approve or disapprove changes to construction plans and specifications, but who does not have day-to-day on-site operational control over construction activities at the site. Secondary operators must either prepare their own SWP3 or participate in a shared SWP3 that covers the areas of the construction site where they have control over the plans and specifications. If there is not a primary operator at the construction site,then the secondary operator is defined as the primary operator and must comply with the requirements for primary operators. Outfall-For the purpose of this permit, a point source at the point where stormwater runoff associated with construction activity discharges to surface water in the state and does not include open conveyances connecting two municipal separate storm sewers,or pipes, tunnels, or other conveyances that connect segments of the same stream or other water of the U.S. and are used to convey waters of the U.S. Permittee-An operator authorized under this general permit. The authorization maybe gained through submission of a notice of intent,by waiver, or by meeting the requirements for automatic coverage to discharge stormwater runoff and certain non-stormwater discharges. Page 9 Construction General Permit TPDES General Permit TXR150000 Point Source— (from 4o CFR§122.2)Any discernible, confined, and discrete conveyance, including but not limited to, any pipe, ditch, channel,tunnel, conduit,well, discrete fissure, container, rolling stock concentrated animal feeding operation,landfill leachate collection system,vessel or other floating craft from which pollutants are, or may be, discharged. This term does not include return flows from irrigated agriculture or agricultural stormwater runoff. Pollutant- Dredged spoil, solid waste,incinerator residue, sewage,garbage, sewage sludge, filter backwash, munitions, chemical wastes,biological materials, radioactive materials,heat, wrecked or discarded equipment, rock,sand,cellar dirt, and industrial,municipal, and agricultural waste discharged into any surface water in the state. The term"pollutant" does not include tail water or runoff water from irrigation or rainwater runoff from cultivated or uncultivated rangeland,pastureland, and farmland. For the purpose of this permit,the term "pollutant"includes sediment. Pollution-(from Texas Water Code(TWC) §26.001(14))The alteration of the physical, thermal, chemical, or biological quality of, or the contamination of, any surface water in the state that renders the water harmful, detrimental,or injurious to humans,animal life, vegetation, or property or to public health, safety, or welfare, or impairs the usefulness or the public enjoyment of the water for any lawful or reasonable purpose. Rainfall Erosivity Factor(R factor) -the total annual erosive potential that is due to climatic effects, and is part of the Revised Universal Soil Loss Equation(RUSLE). Receiving Water-A"Water of the United States" as defined in 4o CFR§122.2 into which the regulated stormwater discharges. Semiarid Areas-areas with an average annual rainfall of 10 to 20 inches Separate Storm Sewer System-A conveyance or system of conveyances (including roads with drainage systems, streets, catch basins, curbs, gutters, ditches,man-made channels, or storm drains),designed or used for collecting or conveying stormwater; that is not a combined sewer, and that is not part of a publicly owned treatment works(POTW). Small Construction Activity-Construction activities including clearing, grading, and excavating that result in land disturbance of equal to or greater than one(1) acre and less than five(5) acres of land. Small construction activity also includes the disturbance of less than one(1) acre of total land area that is part of a larger common plan of development or sale if the larger common plan will ultimately disturb equal to or greater than one(1) and less than five(5) acres of land. Small construction activity does not include routine maintenance that is performed to maintain the original line and grade,hydraulic capacity,or original purpose of the site(for example,the routine grading of existing dirt roads, asphalt overlays of existing roads,the routine clearing of existing right-of-ways, and similar maintenance activities.) Steep Slopes —Where a state,Tribe,local government,or industry technical manual(e.g. stormwater BMP manual) has defined what is to be considered a"steep slope",this permit's definition automatically adopts that definition.Where no such definition exists, steep slopes are automatically defined as those that are 15 percent or greater in grade. Stormwater(or Stormwater Runoff) -Rainfall runoff, snow melt runoff, and surface runoff and drainage. Stormwater Associated with Construction Activity-Stormwater runoff from a construction activity where soil disturbing activities(including clearing,grading, excavating) result in the disturbance of one(1) or more acres of total land area, or are part of a larger common plan of development or sale that will result in disturbance of one(1) or more acres of total land area. Structural Control(or Practice) -A pollution prevention practice that requires the construction of a device, or the use of a device,to reduce or prevent pollution in stormwater Page 10 Construction General Permit TPDES General Permit TXR150000 runoff. Structural controls and practices may include but are not limited to: silt fences, earthen dikes, drainage swales, sediment traps, check dams, subsurface drains, storm drain inlet protection, rock outlet protection,reinforced soil retaining systems, gabions, and temporary or permanent sediment basins. Surface Water in the State- Lakes,bays,ponds,impounding reservoirs, springs, rivers, streams, creeks, estuaries,wetlands,marshes,inlets, canals,the Gulf of Mexico inside the territorial limits of the state (from the mean high water mark(MHWM) out 10.36 miles into the Gulf), and all other bodies of surface water, natural or artificial, inland or coastal,fresh or salt,navigable or nonnavigable, and including the beds and banks of all water-courses and bodies of surface water,that are wholly or partially inside or bordering the state or subject to the jurisdiction of the state; except that waters in treatment systems which are authorized by state or federal law, regulation,or permit, and which are created for the purpose of waste treatment are not considered to be water in the state. Temporary Stabilization-A condition where exposed soils or disturbed areas are provided a protective cover or other structural control to prevent the migration of pollutants. Temporary stabilization may include temporary seeding, geotextiles, mulches, and other techniques to reduce or eliminate erosion until either permanent stabilization can be achieved or until further construction activities take place. Total Maximum Daily Load(TMDL) -The total amount of a pollutant that a water body can assimilate and still meet the Texas Surface Water Quality Standards. Turbidity—A condition of water quality characterized by the presence of suspended solids and/or organic material. Waters of the United States-(from 4o CFR§122.2)Waters of the United States or waters of the U.S. means: (a) all waters which are currently used,were used in the past, or may be susceptible to use in interstate or foreign commerce, including all waters which are subject to the ebb and flow of the tide; (b) all interstate waters, including interstate wetlands; (c) all other waters such as intrastate lakes, rivers,streams (including intermittent streams),mudflats, sandflats,wetlands, sloughs, prairie potholes,wet meadows, playa lakes, or natural ponds that the use, degradation, or destruction of which would affect or could affect interstate or foreign commerce including any such waters: (1) which are or could be used by interstate or foreign travelers for recreational or other purposes; (2) from which fish or shellfish are or could be taken and sold in interstate or foreign commerce; or (3) which are used or could be used for industrial purposes by industries in interstate commerce; (d) all impoundments of waters otherwise defined as waters of the United States under this definition; (e) tributaries of waters identified in paragraphs(a)through(d)of this definition; (f) the territorial sea; and (g) wetlands adjacent to waters (other than waters that are themselves wetlands) identified in paragraphs (a)through(f) of this definition. Waste treatment systems,including treatment ponds or lagoons designed to meet the requirements of CWA(other than cooling ponds as defined in 4o CFR§423.11(m)which also meet the criteria of this definition) are not waters of the U.S. This exclusion applies only to manmade bodies of water which neither were originally created in waters of the U.S. (such as Page 11 Construction General Permit TPDES General Permit TXRi50000 disposal area in wetlands)nor resulted from the impoundment of waters of the U.S. Waters of the U.S. do not include prior converted cropland. Notwithstanding the determination of an area's status as prior converted cropland by any other federal agency,for the purposes of the CWA,the final authority regarding CWA jurisdiction remains with EPA. Part II. Permit Applicability and Coverage Section A. Discharges Eligible for Authorization 1. Stormwater Associated with Construction Activity Discharges of stormwater runoff from small and large construction activities maybe authorized under this general permit. 2. Discharges of Stormwater Associated with Construction Support Activities Examples of construction support activities include,but are not limited to, concrete batch plants, rock crushers, asphalt batch plants, equipment staging areas,material storage yards, material borrow areas, and excavated material disposal areas. Construction support activities authorized under this general permit are not commercial operations, and do not serve multiple unrelated construction projects. Discharges of stormwater runoff from construction support activities may be authorized under this general permit,provided that the following conditions are met: (a) the activities are located within one(1)mile from the boundary of the permitted construction site and directly support the construction activity; (b) an SWP3 is developed for the permitted construction site according to the provisions of this general permit, and includes appropriate controls and measures to reduce erosion and discharge of pollutants in stormwater runoff from the construction support activities; and (c) the construction support activities either do not operate beyond the completion date of the construction activity or,at the time that they do, are authorized under separate Texas Pollutant Discharge Elimination System(TPDES) authorization. Separate TPDES authorization may include the TPDES Multi Sector General Permit(MSGP), TXRo50000 (related to stormwater discharges associated with industrial activity), separate authorization under this general permit if applicable, coverage under an alternative general permit if available, or authorization under an individual water quality permit. 3. Non-Stormwater Discharges The following non-stormwater discharges from sites authorized under this general permit are also eligible for authorization under this general permit: (a) discharges from fire fighting activities(fire fighting activities do not include washing of trucks, run-off water from training activities,test water from fire suppression systems, or similar activities); (b) uncontaminated fire hydrant flushings(excluding discharges of hyperchlorinated water, unless the water is first dechlorinated and discharges are not expected to adversely affect aquatic life),which include flushings from systems that utilize potable water,surface water, or groundwater that does not contain additional pollutants(uncontaminated fire hydrant flushings do not include systems utilizing reclaimed wastewater as a source water); (c) water from the routine external washing of vehicles,the external portion of buildings or structures, and pavement,where detergents and soaps are not used,where spills or leaks of toxic or hazardous materials have not occurred(unless spilled materials Page 12 Construction General Permit TPDES General Permit TXR150000 have been removed; and if local state, or federal regulations are applicable,the materials are removed according to those regulations), and where the purpose is to remove mud, dirt, or dust; (d) uncontaminated water used to control dust; (e) potable water sources,including waterline flushings,but excluding discharges of hyperchlorinated water,unless the water is first dechlorinated and discharges are not expected to adversely affect aquatic life; (f) uncontaminated air conditioning condensate; (g) uncontaminated ground water or spring water,including foundation or footing drains where flows are not contaminated with industrial materials such as solvents; and • (h) lawn watering and similar irrigation drainage. 4. Other Permitted Discharges Any discharge authorized under a separate National Pollutant Discharge Elimination System(NPDES),TPDES, or TCEQ permit maybe combined with discharges authorized by this general permit,provided those discharges comply with the associated permit. Section B. Concrete Truck Wash Out The wash out of concrete trucks at regulated construction sites must be performed in accordance with the requirements of Part V of this general permit. Section C. Limitations on Permit Coverage 1. Post Construction Discharges Discharges that occur after construction activities have been completed, and after the construction site and any supporting activity site have undergone final stabilization, are not eligible for coverage under this general permit. Discharges originating from the sites are not authorized under this general permit following the submission of the notice of termination(NOT) or removal of the appropriate site notice, as applicable,for the regulated construction activity. 2. Prohibition of Non-Stormwater Discharges Except as otherwise provided in Part II.A. of this general permit, only discharges that are composed entirely of stormwater associated with construction activity may be authorized under this general permit. 3. Compliance With Water Quality Standards Discharges to surface water in the state that would cause,have the reasonable potential to cause,or contribute to a violation of water quality standards or that would fail to protect and maintain existing designated uses are not eligible for coverage under this general permit. The executive director may require an application for an individual permit or alternative general permit(see Parts II.H.2. and 3.)to authorize discharges to surface water in the state if the executive director determines that any activity will cause, has the reasonable potential to cause, or contribute to a violation of water quality standards or is found to cause,has the reasonable potential to cause, or contribute to, the impairment of a designated use. The executive director may also require an application for an individual permit considering factors described in Part II.H.2. of this general permit. Page 13 Construction General Permit TPDES General Permit TXR150000 4. Impaired Receiving Waters and Total Maximum Daily Load(TMDL) Requirements New sources or new discharges of the pollutants of concern to impaired waters are not authorized by this permit unless otherwise allowable under 3o TAC Chapter 305 and applicable state law. Impaired waters are those that do not meet applicable water quality standards and are listed on the EPA approved CWA§303(d) List. Pollutants of concern are those for which the water body is listed as impaired. Discharges of the pollutants of concern to impaired water bodies for which there is a TMDL are not eligible for this general permit unless they are consistent with the approved TMDL. Permittees must incorporate the conditions and requirements applicable to their discharges into their SWP3, in order to be eligible for coverage under this general permit. For consistency with the construction stormwater-related items in an approved TMDL,the SWP3 must be consistent with any applicable condition, goal, or requirement in the TMDL,TMDL Implementation Plan(I-Plan), or as otherwise directed by the executive director. 5. Discharges to the Edwards Aquifer Recharge or Contributing Zone Discharges cannot be authorized by this general permit where prohibited by 3o TAC Chapter 213(relating to Edwards Aquifer). In addition,commencement of construction (i.e.,the initial disturbance of soils associated with clearing, grading, or excavating activities, as well as other construction-related activities such as stockpiling of fill material and demolition) at a site regulated under 3o TAC Chapter 213, may not begin until the appropriate Edwards Aquifer Protection Plan(EAPP)has been approved by the TCEQ's Edwards Aquifer Protection Program. (a) For new discharges located within the Edwards Aquifer Recharge Zone, or within that area upstream from the recharge zone and defined as the Contributing Zone (CZ), operators must meet all applicable requirements of, and operate according to, 3o TAC Chapter 213 (Edwards Aquifer Rule)in addition to the provisions and requirements of this general permit. (b) For existing discharges located within the Edwards Aquifer Recharge Zone,the requirements of the agency-approved Water Pollution Abatement Plan (WPAP) under the Edwards Aquifer Rule is in addition to the requirements of this general permit. BMPs and maintenance schedules for structural stormwater controls,for example, may be required as a provision of the rule. All applicable requirements of the Edwards Aquifer Rule for reductions of suspended solids in stormwater runoff are in addition to the requirements in this general permit for this pollutant. 6. Discharges to Specific Watersheds and Water Quality Areas Discharges otherwise eligible for coverage cannot be authorized by this general permit where prohibited by 3o TAC Chapter 311 (relating to Watershed Protection)for water quality areas and watersheds. 7. Protection of Streams and Watersheds by Other Governmental Entities This general permit does not limit the authority or ability of federal, other state, or local governmental entities from placing additional or more stringent requirements on construction activities or discharges from construction activities. For example,this permit does not limit the authority of a home-rule municipality provided by Texas Local Government Code§401.002. 8. Indian Country Lands Stormwater runoff from construction activities occurring on Indian Country lands are not under the authority of the TCEQ and are not eligible for coverage under this general permit. If discharges of stormwater require authorization under federal NPDES Page 14 Construction General Permit TPDES General Permit TXRi50000 regulations, authority for these discharges must be obtained from the U.S. Environmental Protection Agency(EPA). 9. Oil and Gas Production Stormwater runoff from construction activities associated with the exploration, development,or production of oil or gas or geothermal resources,including transportation of crude oil or natural gas by pipeline, are not under the authority of the TCEQ and are not eligible for coverage under this general permit. If discharges of stormwater require authorization under federal NPDES regulations, authority for these discharges must be obtained from the EPA. 10. Stormwater Discharges from Agricultural Activities Stormwater discharges from agricultural activities that are not point source discharges of stormwater are not subject to TPDES permit requirements. These activities may include clearing and cultivating ground for crops, construction of fences to contain livestock, construction of stock ponds, and other similar agricultural activities. Discharges of stormwater runoff associated with the construction of facilities that are subject to TPDES regulations,such as the construction of concentrated animal feeding operations,would be point sources regulated under this general permit. ii. •Endangered Species Act Discharges that would adversely affect a listed endangered or threatened aquatic or aquatic-dependent species or its critical habitat are not authorized by this permit, unless the requirements of the Endangered Species Act are satisfied. Federal requirements related to endangered species apply to all TPDES permitted discharges and site-specific controls may be required to ensure that protection of endangered or threatened species is achieved. If a permittee has concerns over potential impacts to listed species,the permittee may contact TCEQ for additional information. 12. Other Nothing in Part II of the general permit is intended to negate any person's ability to assert the force majeure(act of God,war,strike, riot,or other catastrophe)defenses found in 3o TAC §70.7. Section D. Deadlines for Obtaining Authorization to Discharge 1. Large Construction Activities (a) New Construction-Discharges from sites where the commencement of construction occurs on or after the effective date of this general permit must be authorized, either under this general permit or a separate TPDES permit,prior to the commencement of those construction activities. (b) Ongoing Construction-Operators of large construction activities continuing to operate after the effective date of this permit, and authorized under TPDES general permit TXR150000 (effective on March 5, 2008),must submit an NOI to renew authorization or a NOT to terminate coverage under this general permit within 90 days of the effective date of this general permit. During this interim period, as a requirement of this TPDES permit,the operator must continue to meet the conditions and requirements of the previous TPDES permit. 2. Small Construction Activities (a) New Construction-Discharges from sites where the commencement of construction occurs on or after the effective date of this general permit must be authorized, either Page 15 Construction General Permit TPDES General Permit TXRi50000 under this general permit or a separate TPDES permit,prior to the commencement of those construction activities. (b) Ongoing Construction-Discharges from ongoing small construction activities that commenced prior to the effective date of this general permit, and that would not meet the conditions to qualify for termination of this permit as described in Part II.E. of this general permit, must meet the requirements to be authorized, either under this general permit or a separate TPDES permit,within 90 days of the effective date of this general permit. During this interim period, as a requirement of this TPDES permit,the operator must continue to meet the conditions and requirements of the previous TPDES permit. Section E. Obtaining Authorization to Discharge 1. Automatic Authorization for Small Construction Activities With Low Potential for Erosion: If all of the following conditions are met,then a small construction activity is determined to occur during periods of low potential for erosion, and a site operator may be automatically authorized under this general permit without being required to develop an SWP3 or submit an NOI: (a) the construction activity occurs in a county listed in Appendix A; (b) the construction activity is initiated and completed,including either final or temporary stabilization of all disturbed areas,within the time frame identified in Appendix A for the location of the construction site; (c) all temporary stabilization is adequately maintained to effectively reduce or prohibit erosion,permanent stabilization activities have been initiated, and a condition of final stabilization is completed no later than 3o days following the end date of the time frame identified in Appendix A for the location of the construction site; (d) the permittee signs a completed TCEQ construction site notice, including the certification statement; (e) a signed copy of the construction site notice is posted at the construction site in a location where it is readily available for viewing by the general public,local,state, and federal authorities prior to commencing construction activities, and maintained in that location until completion of the construction activity; (f) a copy of the signed and certified construction site notice is provided to the operator of any MS4 receiving the discharge at least two days prior to commencement of construction activities; (g) any supporting concrete batch plant or asphalt batch plant is separately authorized for discharges of stormwater runoff or other non-stormwater discharges under an individual TPDES permit, another TPDES general permit, or under an individual TCEQ permit where stormwater and non-stormwater is disposed of by evaporation or irrigation(discharges are adjacent to water in the state); and (h) any non-stormwater discharges are either authorized under a separate permit or authorization, or are not considered to be a wastewater. Part II.G. of this general permit describes how an operator may apply for and obtain a waiver from permitting,for certain small construction activities that occur during a period with a low potential for erosion,where automatic authorization under this section is not available. Page 16 Construction General Permit TPDES General Permit TXRi50000 2. Automatic Authorization For All Other Small Construction Activities: Operators of small construction activities not described in Part II.E.i. above maybe automatically authorized under this general permit, and operators of these sites shall not be required to submit an NOI,provided that they meet all of the following conditions: (a) develop a SWP3 according to the provisions of this general permit,that covers either the entire site or all portions of the site for which the applicant is the operator, and implement that plan prior to commencing construction activities; (b) sign and certify a completed TCEQ small construction site notice,post the notice at the construction site in a location where it is safely and readily available for viewing by the general public,local, state, and federal authorities,prior to commencing construction, and maintain the notice in that location until completion of the construction activity(for linear construction activities, e.g. pipeline or highway,the site notice must be placed in a publicly accessible location near where construction is actively underway; notice for these linear sites may be relocated, as necessary, along the length of the project, and the notice must be safely and readily available for viewing by the general public;local, state, and federal authorities); and (c) provide a copy of the signed and certified construction site notice to the operator of any municipal separate storm sewer system receiving the discharge prior to commencement of construction activities. Operators of small construction activities as defined in Part I.B of this general permit shall not submit an NOI for coverage unless otherwise required by the executive director. As described in Part I(Definitions) of this general permit,large construction activities include those that will disturb less than five(5) acres of land,but that are part of a larger common plan of development or sale that will ultimately disturb five(5)or more acres of land, and must meet the requirements of Part II.E.3.below. 3. Authorization for Large Construction Activities: Operators of large construction activities that qualify for coverage under this general permit must meet all of the following conditions: (a) develop a SWP3 according to the provisions of this general permit that covers either the entire site or all portions of the site for which the applicant is the operator, and implement that plan prior to commencing construction activities; (b) primary operators must submit an NOI, using a form provided by the executive director, at least seven(7) days prior to commencing construction activities, or if utilizing electronic submittal, prior to commencing construction activities. If an additional primary operator is added after the initial NOI is submitted,the new primary operator must submit an NOI at least seven(7) days before assuming operational control, or if utilizing electronic NOI submittal,prior to assuming operational control. If the primary operator changes after the initial NOI is submitted,the new primary operator must submit a paper NOI or an electronic NOI at least ten(1o) days before assuming operational control; (c) all operators of large construction activities must post a site notice in accordance with Part III.D.2. of this permit. The site notice must be located where it is safely and readily available for viewing by the general public,local,state, and federal authorities prior to commencing construction, and must be maintained in that location until completion of the construction activity(for linear construction activities, e.g. pipeline or highway,the site notice must be placed in a publicly accessible location near where construction is actively underway; notice for these linear sites may be relocated, as necessary, along the length of the project, and the notice must be safely and readily available for viewing by the general public;local,state, and federal authorities); Page 17 Construction General Permit TPDES General Permit TXR150000 (d) prior to commencing construction activities, all primary operators must(1)provide a copy of the signed NOI to the operator of any MS4 receiving the discharge and to any secondary construction operator, and(2)list in the SWP3 the names and addresses of all MS4 operators receiving a copy; (e) all persons meeting the definition of"secondary operator"in Part I of this permit are hereby notified that they are regulated under this general permit,but are not required to submit an NOI,provided that a primary operator at the site has submitted an NOI, or is required to submit an NOI, and the secondary operator has provided notification to the operator(s) of the need to obtain coverage(with records of notification available upon request). Any secondary operator notified under this provision may alternatively submit an NOI under this general permit, may seek coverage under an alternative TPDES individual permit,or may seek coverage under an alternative TPDES general permit if available; and (f) all secondary operators must provide a copy of the signed and certified Secondary Operator construction site notice to the operator of any MS4 receiving the discharge prior to commencement of construction activities. 4. Waivers for Small Construction Activities: Part II.G. describes how operators of certain small construction activities may obtain a waiver from coverage. 5. Effective Date of Coverage (a) Operators of small construction activities as described in either Part II.E.i. or II.E.2. above are authorized immediately following compliance with the applicable conditions of Part II.E.i. or II.E.2. Secondary operators of large construction activities as described in Part II.E.3. above are authorized immediately following compliance with the applicable conditions in Part II.E.3. For activities located in areas regulated by 3o TAC Chapter 213,related to the Edwards Aquifer,this authorization to discharge is separate from the requirements of the operator's responsibilities under that rule. Construction may not commence for sites regulated under 3o TAC Chapter 213 until all applicable requirements of that rule are met. (b) Primary operators of large construction activities as described in Part II.E.3. above are provisionally authorized seven(7) days from the date that a completed NOI is postmarked for delivery to the TCEQ,unless otherwise notified by the executive director. If electronic submission of the NOI is provided, and unless otherwise notified by the executive director,primary operators are authorized immediately following confirmation of receipt of the NOI by the TCEQ. Authorization is non- provisional when the executive director finds the NOI is administratively complete and an authorization number is issued for the activity. For activities located in areas regulated by 3o TAC Chapter 213, related to the Edwards Aquifer,this authorization to discharge is separate from the requirements of the operator's responsibilities under that rule. Construction may not commence for sites regulated under 3o TAC Chapter 213 until all applicable requirements of that rule are met. (c) Operators are not prohibited from submitting late NOIs or posting late notices to obtain authorization under this general permit. The TCEQ reserves the right to take appropriate enforcement actions for any unpermitted activities that may have occurred between the time construction commenced and authorization was obtained. 6. Notice of Change(NOC) If relevant information provided in the NOI changes, an NOC must be submitted at least 14 days before the change occurs,if possible. Where 14-day advance notice is not possible,the operator must submit an NOC within 14 days of discovery of the change. If Page 18 Construction General Permit TPDES General Permit TXRi50000 the operator becomes aware that it failed to submit any relevant facts or submitted incorrect information in an NOI,the correct information must be provided to the executive director in an NOC within 14 days after discovery. The NOC shall be submitted on a form provided by the executive director,or by letter if an NOC form is not available. A copy of the NOC must also be provided to the operator of any MS4 receiving the discharge, and a list must be included in the SWP3 that includes the names and addresses of all MS4 operators receiving a copy. Information that may be included on an NOC includes,but is not limited to,the following: the description of the construction project, an increase in the number of acres disturbed(for increases of one or more acres), or the operator name. A transfer of operational control from one operator to another,including a transfer of the ownership of a company,may not be included in an NOC. A transfer of ownership of a company includes changes to the structure of a company, such as changing from a partnership to a corporation or changing corporation types, so that the filing number(or charter number)that is on record with the Texas Secretary of State must be changed. An NOC is not required for notifying TCEQ of a decrease in the number of acres disturbed. This information must be included in the SWP3 and retained on site. 7. Signatory Requirement for NOI Forms,Notice of Termination(NOT) Forms, NOC Letters, and Construction Site Notices NOI forms, NOT forms,NOC letters, and Construction Site Notices that require a signature must be signed according to 3o TAC§ 305.44(relating to Signatories for Applications). 8. Contents of the NOI The NOI form shall require, at a minimum,the following information: (a) the TPDES CGP authorization number for existing authorizations under this general permit,where the operator submits an NOI to renew coverage within 90 days of the effective date of this general permit; (b) the name, address, and telephone number of the operator filing the NOI for permit coverage; (c) the name (or other identifier),address, county, and latitude/longitude of the construction project or site; (d) the number of acres that will be disturbed by the applicant; (e) confirmation that the project or site will not be located on Indian Country lands; (f) confirmation that a SWP3 has been developed in accordance with this general permit, that it will be implemented prior to construction,and that it is compliant with any applicable local sediment and erosion control plans; for multiple operators who prepare a shared SWP3,the confirmation for an operator may be limited to its obligations under the SWP3 provided all obligations are confirmed by at least one operator; (g) name of the receiving water(s); (h) the classified segment number for each classified segment that receives discharges from the regulated construction activity(if the discharge is not directly to a classified segment,then the classified segment number of the first classified segment that those discharges reach); and (i) the name of all surface waters receiving discharges from the regulated construction activity that are on the latest EPA-approved CWA§ 3o3(d) List of impaired waters. Page 19 Construction General Permit TPDES General Permit TXRi50000 Section F. Terminating Coverage 1. Notice of Termination(NOT) Required Each operator that has submitted an NOI for authorization under this general permit must apply to terminate that authorization following the conditions described in this section of the general permit. Authorization must be terminated by submitting an NOT on a form supplied by the executive director. Authorization to discharge under this general permit terminates at midnight on the day the NOT is postmarked for delivery to the TCEQ. If electronic submission of the NOT is provided, authorization to discharge under this permit terminates immediately following confirmation of receipt of the NOT by the TCEQ. Compliance with the conditions and requirements of this permit is required until an NOT is submitted. The NOT must be submitted to TCEQ, and a copy of the NOT provided to the operator of any MS4 receiving the discharge (with a list in the SWP3 of the names and addresses of all MS4 operators receiving a copy),within 3o days after any of the following conditions are met: (a) final stabilization has been achieved on all portions of the site that are the responsibility of the permittee; (b) a transfer of operational control has occurred(See Section II.F.4.below); or (c) the operator has obtained alternative authorization under an individual TPDES permit or alternative TPDES general permit. 2. Minimum Contents of the NOT The NOT form shall require, at a minimum,the following information: (a) if authorization was granted following submission of an NOI,the permittee's site- specific TPDES authorization number for the construction site; (b) an indication of whether the construction activity is completed or if the permittee is simply no longer an operator at the site; (c) the name, address, and telephone number of the permittee submitting the NOT; (d) the name (or other identifier), address, county, and location(latitude/longitude) of the construction project or site; and (e) a signed certification that either all stormwater discharges requiring authorization under this general permit will no longer occur,or that the applicant is no longer the operator of the facility or construction site, and that all temporary structural erosion controls have either been removed,will be removed on a schedule defined in the SWP3, or have been transferred to a new operator if the new operator has applied for permit coverage. Erosion controls that are designed to remain in place for an indefinite period, such as mulches and fiber mats, are not required to be removed or scheduled for removal. 3. Termination of Coverage for Small Construction Sites and for Secondary Operators at Large Construction Sites Each operator that has obtained automatic authorization and has not been required to submit an NOI must remove the site notice upon meeting any of the conditions listed below,complete the applicable portion of the site notice related to removal of the site notice, and submit a copy of the completed site notice to the operator of any MS4 receiving the discharge(or provide alternative notification as allowed by the MS4 operator,with documentation of such notification included in the SWP3),within 30 days of meeting any of the following conditions: Page 20 Construction General Permit TPDES General Permit TXRi50000 (a) final stabilization has been achieved on all portions of the site that are the responsibility of the permittee; (b) a transfer of operational control has occurred(See Section II.F.4.below); or (c) the operator has obtained alternative authorization under an individual or general TPDES permit. Authorization to discharge under this general permit terminates immediately upon removal of the applicable site notice. Compliance with the conditions and requirements of this permit is required until the site notice is removed. 4. Transfer of Operational Control Coverage under this general permit is not transferable. A transfer of operational control includes changes to the structure of a company, such as changing from a partnership to a corporation, or changing to a different corporation type such that a different filing(or charter) number is established with the Texas Secretary of State. When the primary operator of a large construction activity changes or operational control is transferred,the original operator must submit an NOT within ten(1o) days prior to the date that responsibility for operations terminates, and the new operator must submit an NOI at least ten(1o) days prior to the transfer of operational control, in accordance with condition(a) or(b)below. A copy of the NOT must be provided to the operator of any MS4 receiving the discharge in accordance with Section II.F.1. above. Operators of regulated construction activities who are not required to submit an NOI must remove the original site notice, and the new operator must post the required site notice prior to the transfer of operational control,in accordance with condition(a) or(b) below. A copy of the completed site notice must be provided to the operator of any MS4 receiving the discharge, in accordance with Section II.F.3. above. A transfer of operational control occurs when either of the following criteria is met: (a) Another operator has assumed control over all areas of the site that have not been finally stabilized; and all silt fences and other temporary erosion controls have either been removed, scheduled for removal as defined in the SWP3, or transferred to a new operator, provided that the permitted operator has attempted to notify the new operator in writing of the requirement to obtain permit coverage. Record of this notification(or attempt at notification) shall be retained by the operator in accordance with Part VI of this permit. Erosion controls that are designed to remain in place for an indefinite period, such as mulches and fiber mats, are not required to be removed or scheduled for removal. (b) A homebuilder has purchased one or more lots from an operator who obtained coverage under this general permit for a common plan of development or sale. The homebuilder is considered a new operator and shall comply with the requirements listed above, including the development of a SWP3 if necessary. Under these circumstances,the homebuilder is only responsible for compliance with the general permit requirements as they apply to lot(s) it has operational control over,and the original operator remains responsible for common controls or discharges,and must amend its SWP3 to remove the lot(s)transferred to the homebuilder. Section G. Waivers from Coverage The executive director may waive the otherwise applicable requirements of this general permit for stormwater discharges from small construction activities under the terms and conditions described in this section. Page 21 Construction General Permit TPDES General Permit TXR150000 1. Waiver Applicability and Coverage Operators of small construction activities may apply for and receive a waiver from the requirements to obtain authorization under this general permit,where all of the following conditions are met. This waiver from coverage does not apply to non- stormwater discharges. The operator must insure that any non-stormwater discharges are either authorized under a separate permit or authorization, or are not considered to be a wastewater. (a) the calculated rainfall erosivity(R)factor for the entire period of the construction project is less than five(5); (b) the operator submits to the TCEQ a signed waiver certification form, supplied by the executive director, certifying that the construction activity will commence and be completed within a period when the value of the calculated R factor is less than five (5); and (c) the waiver certification form is postmarked for delivery to the TCEQ at least seven(7) days before construction activity begins or,if electronic filing is available, then any time following the receipt of written confirmation from TCEQ that a complete electronic application was submitted and acknowledged. 2. Steps to Obtaining a Waiver The construction site operator may calculate the R factor to request a waiver using the following steps: (a) Estimate the construction start date and the construction end date. The construction end date is the date that final stabilization will be achieved. (b) Find the appropriate Erosivity Index(EI)zone in Appendix B of this permit. (c) Find the EI percentage for the project period by adding the results for each period of the project using the table provided in Appendix D of this permit,in EPA Fact Sheet 2.1, or in USDA Handbook 703,by subtracting the start value from the end value to find the percent EI for the site. (d) Refer to the Isoerodent Map (Appendix C of this permit) and interpolate the annual isoerodent value for the proposed construction location. (e) Multiply the percent value obtained in Step (c) above by the annual isoerodent value obtained in Step(d). This is the R factor for the proposed project. If the value is less than 5,then a waiver may be obtained. If the value is five(5)or more,then a waiver may not be obtained, and the operator must obtain coverage under Part II.E.2. of this permit. Alternatively,the operator may calculate a site-specific R factor utilizing the following online calculator: http://ei.tamu.edu/index.html, or using another available resource. The waiver certification form is not required to be posted at the small construction site. 3. Effective Date of Waiver Operators of small construction activities are provisionally waived from the otherwise applicable requirements of this general permit seven (7) days from the date that a completed waiver certification form is postmarked for delivery to TCEQ, or immediately upon receiving confirmation of approval of an electronic submittal, if electronic form submittals are available. 4. Activities Extending Beyond the Waiver Period If a construction activity extends beyond the approved waiver period due to circumstances beyond the control of the operator,the operator must either: Page 22 Construction General Permit TPDES General Permit TXRi50000 (a) recalculate the R factor using the original start date and a new projected ending date, and if the R factor is still under five(5), submit a new waiver certification form at least two (2) days before the end of the original waiver period; or (b) obtain authorization under this general permit according to the requirements delineated in either Part II.E.2.or Part II.E.3.before the end of the approved waiver period. Section H. Alternative TPDES Permit Coverage 1. Individual Permit Alternative Any discharge eligible for coverage under this general permit may alternatively be authorized under an individual TPDES permit according to 3o TAC §305 (relating to Consolidated Permits). Applications for individual permit coverage should be submitted at least three hundred and thirty(330) days prior to commencement of construction activities to ensure timely authorization. 2. Individual Permit Required The executive director may suspend an authorization or deny an NOI in accordance with the procedures set forth in 3o TAC§205 (relating to General Permits for Waste Discharges), including the requirement that the executive director provide written notice to the permittee. The executive director may require an operator of a construction site, otherwise eligible for authorization under this general permit,to apply for an individual TPDES permit in the following circumstances: (a) the conditions of an approved TMDL or TMDL I-Plan on the receiving water; (b) the activity being determined to cause a violation of water quality standards or being found to cause, or contribute to,the loss of a designated use of surface water in the state: and (c) any other consideration defined in 3o TAC Chapter 205(relating to General Permits for Waste Discharges) including 3o TAC Chapter 2o5.4(c)(3)(D),which allows the commission to deny authorization under the general permit and require an individual permit if a discharger"has been determined by the executive director to have been out of compliance with any rule, order, or permit of the commission, including non- payment of fees assessed by the executive director." Additionally,the executive director may cancel, revoke, or suspend authorization to discharge under this general permit based on a finding of historical and significant noncompliance with the provisions of this general permit,relating to 3o TAC§60.3 (Use of Compliance History). Denial of authorization to discharge under this general permit or suspension of a permittee's authorization under this general permit shall be done according to commission rules in 3o TAC Chapter 205 (relating to General Permits for Waste Discharges). 3. Alternative Discharge Authorization Any discharge eligible for authorization under this general permit may alternatively be authorized under a separate general permit according to 30 TAC Chapter 205 (relating to General Permits for Waste Discharges),if applicable. Section I. Permit Expiration 1. This general permit is effective for a term not to exceed five(5)years. All active discharge authorizations expire on the date provided on page one (1) of this permit. Following public notice and comment, as provided by 3o TAC§205.3 (relating to Page 23 Construction General Permit TPDES General Permit TXRi50000 Public Notice, Public Meetings, and Public Comment),the commission may amend, revoke, cancel,or renew this general permit. 2. If the executive director publishes a notice of the intent to renew or amend this general permit before the expiration date,the permit will remain in effect for existing, authorized discharges until the commission takes final action on the permit. Upon issuance of a renewed or amended permit,permittees maybe required to submit an NOI within 90 days following the effective date of the renewed or amended permit, unless that permit provides for an alternative method for obtaining authorization. 3. If the commission does not propose to reissue this general permit within 90 days before the expiration date,permittees shall apply for authorization under an individual permit or an alternative general permit. If the application for an individual permit is submitted before the expiration date, authorization under this expiring general permit remains in effect until the issuance or denial of an individual permit. No new NOIs will be accepted nor new authorizations honored under the general permit after the expiration date. Part III. Stormwater Pollution Prevention Plans (SWP3) All regulated construction site operators shall prepare an SWP3,prior to submittal of an NOI, to address discharges authorized under Parts II.E.2. and II.E.3. of this general permit that will reach Waters of the U.S.,including discharges to MS4s and privately owned separate storm sewer systems that drain to Waters of the U.S.,to identify and address potential sources of pollution that are reasonably expected to affect the quality of discharges from the construction site, including off-site material storage areas,overburden and stockpiles of dirt,borrow areas, equipment staging areas,vehicle repair areas,fueling areas, etc., used solely by the permitted project. The SWP3 must describe the implementation of practices that will be used to minimize to the extent practicable the discharge of pollutants in stormwater associated with construction activity and non-stormwater discharges described in Part II.A.3., in compliance with the terms and conditions of this permit. Individual operators at a site may develop separate SWP3s that cover only their portion of the project,provided reference is made to the other operators at the site. Where there is more than one SWP3 for a site,permittees must coordinate to ensure that BMPs and controls are consistent and do not negate or impair the effectiveness of each other. Regardless of whether a single comprehensive SWP3 is developed or separate SWP3s are developed for each operator, it is the responsibility of each operator to ensure compliance with the terms and conditions of this general permit in the areas of the construction site where that operator has control over construction plans and specifications or day-to-day operations. Section A. Shared SWP3 Development For more effective coordination of BMPs and opportunities for cost sharing, a cooperative effort by the different operators at a site is encouraged. Operators must independently obtain authorization,but may work together to prepare and implement a single, comprehensive SWP3 for the entire construction site. 1. The SWP3 must clearly list the name and,for large construction activities,the general permit authorization numbers,for each operator that participates in the shared SWP3. Until the TCEQ responds to receipt of the NOI with a general permit authorization number,the SWP3 must specify the date that the NOI was submitted to TCEQ by each operator. Each operator participating in the shared plan must also sign the SWP3. Page 24 Construction General Permit TPDES General Permit TXR150000 2. The SWP3 must clearly indicate which operator is responsible for satisfying each shared requirement of the SWP3. If the responsibility for satisfying a requirement is not described in the plan,then each permittee is entirely responsible for meeting the requirement within the boundaries of the construction site where they perform construction activities. The SWP3 must clearly describe responsibilities for meeting each requirement in shared or common areas. 3. The SWP3 may provide that one operator is responsible for preparation of a SWP3 in compliance with the CGP, and another operator is responsible for implementation of the SWP3 at the project site. Section B. Responsibilities of Operators 1. Secondary Operators and Primary Operators with Control Over Construction Plans and Specifications All secondary operators and primary operators with control over construction plans and specifications shall: (a) ensure the project specifications allow or provide that adequate BMPs are developed to meet the requirements of Part III of this general permit; (b) ensure that the SWP3 indicates the areas of the project where they have control over project specifications, including the ability to make modifications in specifications; (c) ensure that all other operators affected by modifications in project specifications are notified in a timely manner so that those operators may modify their BMP s as necessary to remain compliant with the conditions of this general permit; and (d) ensure that the SWP3 for portions of the project where they are operators indicates the name and site-specific TPDES authorization number(s) for operators with the day-to-day operational control over those activities necessary to ensure compliance with the SWP3 and other permit conditions. If the party with day-to-day operational control has not been authorized or has abandoned the site,the person with control over project specifications is considered to be the responsible party until the authority is transferred to another party and the SWP3 is updated. 2. Primary Operators with Day-to-Day Operational Control Primary operators with day-to-day operational control of those activities at a project that are necessary to ensure compliance with an SWP3 and other permit conditions must ensure that the SWP3 accomplishes the following requirements: (a) meets the requirements of this general permit for those portions of the project where they are operators; (b) identifies the parties responsible for implementation of BMPs described in the SWP3; (c) indicates areas of the project where they have operational control over day-to-day activities; and (d) includes,for areas where they have operational control over day-to-day activities,the name and site-specific TPDES authorization number of the parties with control over project specifications,including the ability to make modifications in specifications. Section C. Deadlines for SWP3 Preparation, Implementation, and Compliance The SWP3 must be prepared prior to obtaining authorization under this general permit, and implemented prior to commencing construction activities that result in soil Page 25 Construction General Permit TPDES General Permit TXRi50000 disturbance. The SWP3 must be prepared so that it provides for compliance with the terms and conditions of this general permit. Section D. Plan Review and Making Plans Available 1. The SWP3 must be retained on-site at the construction site or,if the site is inactive or does not have an on-site location to store the plan, a notice must be posted describing the location of the SWP3. The SWP3 must be made readily available at the time of an on-site inspection to: the executive director; a federal, state, or local agency approving sediment and erosion plans,grading plans, or stormwater management plans; local government officials; and the operator of a municipal separate storm sewer receiving discharges from the site. If the SWP3 is retained off-site,then it shall be made available as soon as reasonably possible. In most instances,it is reasonable that the SWP3 shall be made available within 24 hours of the request. 2. A primary operator of a large construction activity must post the TCEQ site notice near the main entrance of the construction site. An operator of a small construction activity seeking authorization under this general permit and a secondary operator of a large construction activity must post the TCEQ site notice required in Part II.E.i., 2., or 3. of this general permit in order to obtain authorization. If the construction project is a linear construction project, such as a pipeline or highway,the notices must be placed in a publicly accessible location near where construction is actively underway. Notices for these linear sites may be relocated, as necessary,along the length of the project.The notices must be readily available for viewing by the general public;local, state, and federal authorities; and contain the following information: (a) the site-specific TPDES authorization number for the project if assigned; (b) the operator name, contact name, and contact phone number; (c) a brief description of the project; and (d) the location of the SWP3. 3. This permit does not provide the general public with any right to trespass on a construction site for any reason,including inspection of a site; nor does this permit require that permittees allow members of the general public access to a construction site. Section E. Revisions and Updates to SWP3s The permittee must revise or update the SWP3 whenever the following occurs: 1. a change in design, construction, operation, or maintenance that has a significant effect on the discharge of pollutants and that has not been previously addressed in the SWP3; 2. changing site conditions based on updated plans and specifications, new operators, new areas of responsibility, and changes in BMPs; or 3. results of inspections or investigations by site operators, operators of a municipal separate storm sewer system receiving the discharge, authorized TCEQ personnel, or a federal, state or local agency approving sediment and erosion plans indicate the SWP3 is proving ineffective in eliminating or significantly minimizing pollutants in discharges authorized under this general permit. Section F. Contents of SWP3 The SWP3 must include, at a minimum,the information described in this section and must comply with the construction and development effluent guidelines in Part III, Section G of the general permit. Page 26 Construction General Permit TPDES General Permit TXRi50000 1. A site or project description,which includes the following information: (a) a description of the nature of the construction activity; (b) a list of potential pollutants and their sources; (c) a description of the intended schedule or sequence of activities that will disturb soils for major portions of the site, including estimated start dates and duration of activities; (d) the total number of acres of the entire property and the total number of acres where construction activities will occur,including off-site material storage areas, overburden and stockpiles of dirt, and borrow areas that are authorized under the permittee's NOI; (e) data describing the soil or the quality of any discharge from the site; (f) a map showing the general location of the site (e.g. a portion of a city or county map); (g) a detailed site map(or maps)indicating the following: (i) drainage patterns and approximate slopes anticipated after major grading activities; (ii) areas where soil disturbance will occur; (iii) locations of all controls and buffers, either planned or in place; (iv) locations where temporary or permanent stabilization practices are expected to be used; (v) locations of construction support activities, including off-site activities, that are authorized under the permittee's NOI, including material,waste, borrow,fill, or equipment or chemical storage areas; (vi) surface waters(including wetlands) either at, adjacent, or in close proximity to the site,and also indicating those that are impaired waters; (vii) locations where stormwater discharges from the site directly to a surface water body or a municipal separate storm sewer system; (viii) vehicle wash areas; and (ix) designated points on the site where vehicles will exit onto paved roads (for instance, this applies to construction transition from unstable dirt areas to exterior paved roads). Where the amount of information required to be included on the map would result in a single map being difficult to read and interpret,the operator shall develop a series of maps that collectively include the required information. (h) the location and description of support activities authorized under the permittee's NOI,including asphalt plants, concrete plants, and other activities providing support to the construction site that is authorized under this general permit; (i) the name of receiving waters at or near the site that may be disturbed or that may receive discharges from disturbed areas of the project; (j) a copy of this TPDES general permit; (k) the NOI and acknowledgement certificate for primary operators of large construction sites, and the site notice for small construction sites and for secondary operators of large construction sites; (1) stormwater and allowable non-stormwater discharge locations,including storm drain inlets on site and in the immediate vicinity of the construction site; and Page 27 Construction General Permit TPDES General Permit TXRi50000 (m)locations of all pollutant-generating activities, such as paving operations; concrete,paint and stucco washout and water disposal; solid waste storage and disposal; and dewatering operations. 2. A description of the BMPs that will be used to minimize pollution in runoff. The description must identify the general timing or sequence for implementation. At a minimum,the description must include the following components: (a) General Requirements (i) Erosion and sediment controls must be designed to retain sediment on-site to the extent practicable with consideration for local topography, soil type, and rainfall. (ii) Control measures must be properly selected,installed, and maintained according to the manufacturer's or designer's specifications. (iii) Controls must be developed to minimize the offsite transport of litter, construction debris, and construction materials. (b) Erosion Control and Stabilization Practices The SWP3 must include a description of temporary and permanent erosion control and stabilization practices for the site, compliant with the requirements of Part III.G.1 and G.2 of this general permit,including a schedule of when the practices will be implemented. Site plans should ensure that existing vegetation is preserved where it is possible. (i) Erosion control and stabilization practices may include but are not limited to: establishment of temporary or permanent vegetation, mulching, geotextiles, sod stabilization,vegetative buffer strips,protection of existing trees and vegetation, slope texturing,temporary velocity dissipation devices,flow diversion mechanisms, and other similar measures. (ii) The following records must be maintained and either attached to or referenced in the SWP3,and made readily available upon request to the parties listed in Part III.D.i of this general permit: (A) the dates when major grading activities occur; (B) the dates when construction activities temporarily or permanently cease on a portion of the site; and (C) the dates when stabilization measures are initiated. (iii) Erosion control and stabilization measures must be initiated immediately in portions of the site where construction activities have temporarily ceased and will not resume for a period exceeding 14 calendar days. Stabilization measures that provide a protective cover must be initiated immediately in portions of the site where construction activities have permanently ceased. The term"immediately"is used to define the deadline for initiating stabilization measures. In the context of this requirement, "immediately"means as soon as practicable,but no later than the end of the next work day,following the day when the earth-disturbing activities have temporarily or permanently ceased. Except as provided in (A)through (D)below,these measures must be completed as soon as practicable,but no more than 14 calendar days after the initiation of soil stabilization measures: (A) Where the immediate initiation of stabilization measures after construction activity temporarily or permanently ceased is precluded Page 28 Construction General Permit TPDES General Permit TXR150000 by snow cover or frozen ground conditions, stabilization measures must be initiated as soon as practicable. (B) In arid areas, semi-arid areas,or drought-stricken areas where the immediate initiation of stabilization measures after construction activity has temporarily or permanently ceased or is precluded by arid conditions, erosion control and stabilization measures must be initiated as soon as practicable. Where vegetative controls are not feasible due to arid conditions,the operator shall immediately install, and within 14 calendar days of a temporary or permanent cessation of work in any portion of the site complete, non-vegetative erosion controls. If non-vegetative controls are not feasible,the operator shall install temporary sediment controls as required in Paragraph(C) below. (C) In areas where temporary stabilization measures are infeasible, the operator may alternatively utilize temporary perimeter controls. The operator must document in the SWP3 the reason why stabilization measures are not feasible,and must demonstrate that the perimeter controls will retain sediment on site to the extent practicable. The operator must continue to inspect the BMPs at the frequency established in Section III.F.7.(a)for unstabilized sites. (D) If the initiation or completion of vegetative stabilization is affected by circumstances beyond the control of the permittee,vegetative stabilization must be initiated or completed as soon as conditions or circumstances allow it on the site. The requirement to initiate stabilization is triggered as soon as it is known with reasonable certainty that work will be stopped for 14 or more additional calendar days. (iv) Final stabilization must be achieved prior to termination of permit coverage. (v) TCEQ does not expect that temporary or permanent stabilization measures to be applied to areas that are intended to be left un-vegetated or un- stabilized following construction(e.g., dirt access roads,utility pole pads, areas being used for storage of vehicles, equipment, or materials). (c) Sediment Control Practices The SWP3 must include a description of any sediment control practices used to remove eroded soils from stormwater runoff,including the general timing or sequence for implementation of controls. (i) Sites With Drainage Areas of Ten or More Acres (A) Sedimentation Basin(s) (1) A sedimentation basin is required,where feasible,for a common drainage location that serves an area with ten(1o) or more acres disturbed at one time. A sedimentation basin may be temporary or permanent,and must provide sufficient storage to contain a calculated volume of runoff from a 2-year, 24-hour storm from each disturbed acre drained. When calculating the volume of runoff from a 2-year, 24-hour storm event, it is not required to include the flows from offsite areas and flow from onsite areas that are either undisturbed or have already undergone permanent stabilization,if these flows are diverted around both the disturbed areas of the site and the sediment basin. Capacity calculations shall be included in the SWP3. Page 29 Construction General Permit TPDES General Permit TXRi5oo0o (2) Where rainfall data is not available or a calculation cannot be performed,the sedimentation basin must provide at least 3,600 cubic feet of storage per acre drained until final stabilization of the site. (3) If a sedimentation basin is not feasible,then the permittee shall provide equivalent control measures until final stabilization of the site. In determining whether installing a sediment basin is feasible,the permittee may consider factors such as site soils, slope, available area,public safety,precipitation patterns, site geometry, site vegetation,infiltration capacity,geotechnical factors,depth to groundwater, and other similar considerations. The permittee shall document the reason that the sediment basins are not feasible, and shall utilize equivalent control measures, which may include a series of smaller sediment basins. (4) Unless infeasible,when discharging from sedimentation basins and impoundments,the permittee shall utilize outlet structures that withdraw water from the surface. (B) Perimeter Controls: At a minimum, silt fences,vegetative buffer strips, or equivalent sediment controls are required for all down slope boundaries of the construction area, and for those side slope boundaries deemed appropriate as dictated by individual site conditions. (ii) Controls for Sites With Drainage Areas Less than Ten Acres: (A) Sediment traps and sediment basins may be used to control solids in stormwater runoff for drainage locations serving less than ten(io) acres. At a minimum, silt fences,vegetative buffer strips, or equivalent sediment controls are required for all down slope boundaries of the construction area, and for those side slope boundaries deemed appropriate as dictated by individual site conditions. (B) Alternatively, a sediment basin that provides storage for a calculated volume of runoff from a 2-year, 24-hour storm from each disturbed acre drained may be utilized. Where rainfall data is not available or a calculation cannot be performed, a temporary or permanent sediment basin providing 3,600 cubic feet of storage per acre drained may be provided. If a calculation is performed,then the calculation shall be included in the SWP3. (C) If sedimentation basins or impoundments are used, the permittee shall comply with the requirements in Part III.G.6 of this general permit. 3. Description of Permanent Stormwater Controls A description of any measures that will be installed during the construction process to control pollutants in stormwater discharges that may occur after construction operations have been completed must be included in the SWP3. Permittees are only responsible for the installation and maintenance of stormwater management measures prior to final stabilization of the site or prior to submission of an NOT. 4. Other Required Controls and BMPs (a) Permittees shall minimize,to the extent practicable,the off-site vehicle tracking of sediments and the generation of dust. The SWP3 shall include a description of controls utilized to accomplish this requirement. Page 30 Construction General Permit TPDES General Permit TXR150000 (b) The SWP3 must include a description of construction and waste materials expected to be stored on-site and a description of controls to minimize pollutants from these materials. (c) The SWP3 must include a description of potential pollutant sources from areas other than construction(such as stormwater discharges from dedicated asphalt plants and dedicated concrete batch plants), and a description of controls and measures that will be implemented at those sites to minimize pollutant discharges. (d) Permittees shall place velocity dissipation devices at discharge locations and along the length of any outfall channel(i.e., runoff conveyance)to provide a non- erosive flow velocity from the structure to a water course,so that the natural physical and biological characteristics and functions are maintained,and protected. (e) Permittees shall design and utilize appropriate controls to minimize the offsite transport of suspended sediments and other pollutants if it is necessary to pump or channel standing water from the site. (f) Permittees shall ensure that all other required controls and BMPs comply with all of the requirements of Part III.G of this general permit. 5. Documentation of Compliance with Approved State and Local Plans (a) Permittees must ensure that the SWP3 is consistent with requirements specified in applicable sediment and erosion site plans or site permits, or stormwater management site plans or site permits approved by federal, state, or local officials. (b) SWP3s must be updated as necessary to remain consistent with any changes applicable to protecting surface water resources in sediment erosion site plans or site permits, or stormwater management site plans or site permits approved by state or local official for which the permittee receives written notice. (c) If the permittee is required to prepare a separate management plan, including but not limited to a WPAP or Contributing Zone Plan in accordance with 3o TAC Chapter 213 (related to the Edwards Aquifer),then a copy of that plan must be either included in the SWP3 or made readily available upon request to authorized personnel of the TCEQ. The permittee shall maintain a copy of the approval letter for the plan in its SWP3. 6. Maintenance Requirements (a) All protective measures identified in the SWP3 must be maintained in effective operating condition. If,through inspections or other means,the permittee determines that BMPs are not operating effectively,then the permittee shall perform maintenance as necessary to maintain the continued effectiveness of stormwater controls, and prior to the next rain event if feasible. If maintenance prior to the next anticipated storm event is impracticable,the reason shall be documented in the SWP3 and maintenance must be scheduled and accomplished as soon as practicable. Erosion and sediment controls that have been intentionally disabled, run-over, removed, or otherwise rendered ineffective must be replaced or corrected immediately upon discovery. (b) If periodic inspections or other information indicates a control has been used incorrectly,is performing inadequately, or is damaged, then the operator shall replace or modify the control as soon as practicable after making the discovery. (c) Sediment must be removed from sediment traps and sedimentation ponds no later than the time that design capacity has been reduced by 5o%. For perimeter Page 31 Construction General Permit TPDES General Permit TXRi50000 controls such as silt fences,berms, etc.,the trapped sediment must be removed before it reaches 5o% of the above-ground height. (d) If sediment escapes the site, accumulations must be removed at a frequency that minimizes off-site impacts, and prior to the next rain event,if feasible. If the permittee does not own or operate the off-site conveyance,then the permittee shall work with the owner or operator of the property to remove the sediment. 7. Inspections of Controls (a) Personnel provided by the permittee must inspect disturbed areas of the construction site that have not been finally stabilized, areas used for storage of materials that are exposed to precipitation,discharge locations, and structural controls for evidence of, or the potential for,pollutants entering the drainage system. Personnel conducting these inspections must be knowledgeable of this general permit,familiar with the construction site, and knowledgeable of the SWP3 for the site. Sediment and erosion control measures identified in the SWP3 must be inspected to ensure that they are operating correctly. Locations where vehicles enter or exit the site must be inspected for evidence of off-site sediment tracking. Inspections must be conducted at least once every 14 calendar days and within 24 hours of the end of a storm event of 0.5 inches or greater. Where sites have been finally or temporarily stabilized or where runoff is unlikely due to winter conditions (e.g. site is covered with snow,ice, or frozen ground exists), inspections must be conducted at least once every month. In arid, semi-arid, or drought-stricken areas, inspections must be conducted at least once every month and within 24 hours after the end of a storm event of 0.5 inches or greater. The SWP3 must also contain a record of the total rainfall measured, as well as the approximate beginning and ending dates of winter or drought conditions resulting in monthly frequency of inspections. As an alternative to the above-described inspection schedule of once every 14 calendar days and within 24 hours of a storm event of 0.5 inches or greater,the SWP3 may be developed to require that these inspections will occur at least once every seven(7) calendar days. If this alternative schedule is developed,then the inspection must occur regardless of whether or not there has been a rainfall event since the previous inspection. The inspections may occur on either schedule provided that the SWP3 reflects the current schedule and that any changes to the schedule are conducted in accordance with the following provisions: the schedule may be changed a maximum of one time each month,the schedule change must be implemented at the beginning of a calendar month, and the reason for the schedule change must be documented in the SWP3 (e.g., end of"dry"season and beginning of"wet" season). (b) Utility line installation, pipeline construction, and other examples of long, narrow,linear construction activities may provide inspection personnel with limited access to the areas described in Part III.F.7.(a) above. Inspection of these areas could require that vehicles compromise temporarily or even permanently stabilized areas, cause additional disturbance of soils, and increase the potential for erosion. In these circumstances,controls must be inspected at least once every 14 calendar days and within 24 hours of the end of a storm event of 0.5 inches or greater,but representative inspections may be performed. For representative inspections,personnel must inspect controls along the construction site for 0.25 mile above and below each access point where a roadway,undisturbed right-of-way, or other similar feature intersects the construction site and allows access to the areas described in Part III.F.7.(a) Page 32 Construction General Permit TPDES General Permit TXR150000 above. The conditions of the controls along each inspected 0.25 mile portion may be considered as representative of the condition of controls along that reach extending from the end of the 0.25 mile portion to either the end of the next 0.25 mile inspected portion, or to the end of the project,whichever occurs first. As an alternative to the above-described inspection schedule of once every 14 calendar days and within 24 hours of a storm event of 0.5 inches or greater,the SWP3 may be developed to require that these inspections will occur at least once every seven(7) calendar days. If this alternative schedule is developed,the inspection must occur regardless of whether or not there has been a rainfall event since the previous inspection. The inspections may occur on either schedule provided that the SWP3 reflects the current schedule and that any changes to the schedule are conducted in accordance with the following provisions: the schedule maybe changed a maximum of one time each month, the schedule change must be implemented at the beginning of a calendar month, and the reason for the schedule change must be documented in the SWP3 (e.g., end of"dry" season and beginning of"wet"season). (c) In the event of flooding or other uncontrollable situations which prohibit access to the inspection sites,inspections must be conducted as soon as access is practicable. (d) The SWP3 must be modified based on the results of inspections, as necessary,to better control pollutants in runoff. Revisions to the SWP3 must be completed within seven(7) calendar days following the inspection. If existing BMPs are modified or if additional BMPs are necessary, an implementation schedule must be described in the SWP3 and wherever possible those changes implemented before the next storm event. If implementation before the next anticipated storm event is impracticable,these changes must be implemented as soon as practicable. (e) A report summarizing the scope of the inspection,the date(s) of the inspection, and major observations relating to the implementation of the SWP3 must be made and retained as part of the SWP3. Major observations should include: The locations of discharges of sediment or other pollutants from the site; locations of BMPs that need to be maintained; locations of BMPs that failed to operate as designed or proved inadequate for a particular location; and locations where additional BMPs are needed. Actions taken as a result of inspections must be described within, and retained as a part of,the SWP3. Reports must identify any incidents of non-compliance. Where a report does not identify any incidents of non-compliance,the report must contain a certification that the facility or site is in compliance with the SWP3 and this permit. The report must be signed by the person and in the manner required by 3o TAC§305.128 (relating to Signatories to Reports). The names and qualifications of personnel making the inspections for the permittee maybe documented once in the SWP3 rather than being included in each report. 8. The SWP3 must identify and ensure the implementation of appropriate pollution prevention measures for all eligible non-stormwater components of the discharge, as listed in Part II.A.3. of this permit. 9. The SWP3 must include the information required in Part III.B. of this general permit. 10. The SWP3 must include pollution prevention procedures that comply with Part III.G.4 of this general permit. Page 33 Construction General Permit TPDES General Permit TXRi50000 Section G. Erosion and Sediment Control Requirements Applicable to All Sites Except as provided in 4o CFR§§125.3o-125.32, any discharge regulated under this general permit,with the exception of sites that obtained waivers based on low rainfall erosivity,must achieve, at a minimum,the following effluent limitations representing the degree of effluent reduction attainable by application of the best practicable control technology currently available(BPT). 1. Erosion and sediment controls. Design,install, and maintain effective erosion controls and sediment controls to minimize the discharge of pollutants.At a minimum,such controls must be designed,installed, and maintained to: (a) Control stormwater volume and velocity within the site to minimize soil erosion; (b) If any stormwater flow will be channelized at the site, stormwater controls must be designed to control both peak flowrates and total stormwater volume to minimize erosion at outlets and to minimize downstream channel and streambank erosion; (c) Minimize the amount of soil exposed during construction activity; (d) Minimize the disturbance of steep slopes; (e) Minimize sediment discharges from the site.The design, installation, and maintenance of erosion and sediment controls must address factors such as the amount, frequency, intensity and duration of precipitation,the nature of resulting stormwater runoff, and soil characteristics,including the range of soil particle sizes expected to be present on the site; (f) If earth disturbance activities are located in close proximity to a surface water, provide and maintain appropriate natural buffers if feasible and as necessary, around surface waters, depending on site-specific topography, sensitivity, and proximity to water bodies. Direct stormwater to vegetated areas to increase sediment removal and maximize stormwater infiltration. If providing buffers is infeasible, the permittee shall document the reason that natural buffers are not feasible, and shall implement additional erosion and sediment controls to reduce sediment load; (g) Preserve native topsoil at the site, unless infeasible; and (h) Minimize soil compaction in post-construction pervious areas. In areas of the construction site where final vegetative stabilization will occur or where infiltration practices will be installed, either: (1) restrict vehicle and equipment use to avoid soil compaction; or (2) prior to seeding or planting areas of exposed soil that have been compacted, use techniques that condition the soils to support vegetative growth,if necessary and feasible; (i) TCEQ does not consider stormwater control features (e.g.,stormwater conveyance channels, storm drain inlets, sediment basins)to constitute"surface waters"for the purposes of triggering the buffer requirement in Part III.G.(f) above. 2. Soil stabilization. Stabilization of disturbed areas must, at a minimum,be initiated immediately whenever any clearing, grading, excavating, or other earth disturbing activities have permanently ceased on any portion of the site, or temporarily ceased on any portion of the site and will not resume for a period exceeding 14 calendar days. In the context of this requirement, "immediately" means as soon as practicable, but no later than the end of the next work day,following the day when the earth- disturbing activities have temporarily or permanently ceased. Temporary Page 34 Construction General Permit TPDES General Permit TXR150000 stabilization must be completed no more than 14 calendar days after initiation of soil stabilization measures,and final stabilization must be achieved prior to termination of permit coverage. In arid, semi-arid, and drought-stricken areas where initiating vegetative stabilization measures immediately is infeasible, alternative non- vegetative stabilization measures must be employed as soon as practicable. Refer to Part III.F.2.(b)for complete erosion control and stabilization practice requirements. 3. Dewatering. Discharges from dewatering activities,including discharges from dewatering of trenches and excavations, are prohibited,unless managed by appropriate controls. 4. Pollution prevention measures. Design,install,implement, and maintain effective pollution prevention measures to minimize the discharge of pollutants.At a minimum, such measures must be designed,installed, implemented, and maintained to: (a) Minimize the discharge of pollutants from equipment and vehicle washing,wheel wash water, and other wash waters.Wash waters must be treated in a sediment basin or alternative control that provides equivalent or better treatment prior to discharge; (b) Minimize the exposure of building materials,building products, construction wastes,trash,landscape materials,fertilizers,pesticides,herbicides,detergents, sanitary waste, and other materials present on the site to precipitation and to stormwater; and (c) Minimize the discharge of pollutants from spills and leaks, and implement chemical spill and leak prevention and response procedures. 5. Prohibited discharges.The following discharges are prohibited: (a) Wastewater from wash out of concrete trucks,unless managed by an appropriate control(see Part V of the general permit); (b) Wastewater from wash out and cleanout of stucco, paint,form release oils, curing compounds and other construction materials; (c) Fuels, oils, or other pollutants used in vehicle and equipment operation and maintenance; and (d) Soaps or solvents used in vehicle and equipment washing. 6. Surface outlets.When discharging from basins and impoundments, utilize outlet structures that withdraw water from the surface, unless infeasible. Part N. Stormwater Runoff from Concrete Batch Plants Discharges of stormwater runoff from concrete batch plants at regulated construction sites maybe authorized under the provisions of this general permit provided that the following requirements are met for concrete batch plant(s) authorized under this permit. If discharges of stormwater runoff from concrete batch plants are not covered under this general permit, then discharges must be authorized under an alternative general permit or individual permit. This permit does not authorize the discharge or land disposal of any wastewater from concrete batch plants at regulated construction sites. Authorization for these wastes must be obtained under an individual permit or an alternative general permit. Section A. Benchmark Sampling Requirements 1. Operators of concrete batch plants authorized under this general permit shall sample the stormwater runoff from the concrete batch plants according to the requirements Page 35 Construction General Permit TPDES General Permit TXR150000 of this section of this general permit, and must conduct evaluations on the effectiveness of the SWP3 based on the following benchmark monitoring values: Table i. Benchmark Parameters Benchmark Benchmark Value Sampling Sample Type Parameter Frequency Oil and Grease 15 mg/L 1/quarter(*1) (*2) Grab(*3) Total Suspended 10o mg/L 1/quarter(*1) (*2) Grab(*3) Solids pH 6.o — 9.0 Standard 1/quarter(*1) (*2) Grab(*3) Units Total Iron 1.3 mg/L 1/quarter(*1) (*2) Grab(*3) (*1) When discharge occurs. Sampling is required within the first 30 minutes of discharge. If it is not practicable to take the sample, or to complete the sampling,within the first 3o minutes, sampling must be completed within the first hour of discharge. If sampling is not completed within the first 3o minutes of discharge,the reason must be documented and attached to all required reports and records of the sampling activity. (*2) Sampling must be conducted at least once during each of the following periods. The first sample must be collected during the first full quarter that a stormwater discharge occurs from a concrete batch plant authorized under this general permit. January through March April through June July through September October through December For projects lasting less than one full quarter, a minimum of one sample shall be collected,provided that a stormwater discharge occurred at least once following submission of the NOI or following the date that automatic authorization was obtained under Section II.E.2., and prior to terminating coverage. (*3) A grab sample shall be collected from the stormwater discharge resulting from a storm event that is at least o.1 inches of measured precipitation that occurs at least 72 hours from the previously measurable storm event. The sample shall be collected downstream of the concrete batch plant, and where the discharge exits any BMPs utilized to handle the runoff from the batch plant, prior to commingling with any other water authorized under this general permit. 2. The permittee must compare the results of sample analyses to the benchmark values above, and must include this comparison in the overall assessment of the SWP3's effectiveness. Analytical results that exceed a benchmark value are not a violation of this permit,as these values are not numeric effluent limitations. Results of analyses are indicators that modifications of the SWP3 should be assessed and may be necessary to protect water quality.The operator must investigate the cause for each exceedance and must document the results of this investigation in the SWP3 by the end of the quarter following the sampling event. Page 36 Construction General Permit TPDES General Permit TXRi50000 The operator's investigation must identify the following: (a) any additional potential sources of pollution, such as spills that might have occurred, (b) necessary revisions to good housekeeping measures that are part of the SWP3, (c) additional BMPs,including a schedule to install or implement the BMPs, and (d) other parts of the SWP3 that may require revisions in order to meet the goal of the benchmark values. Background concentrations of specific pollutants may also be considered during the investigation. If the operator is able to relate the cause of the exceedance to background concentrations,then subsequent exceedances of benchmark values for that pollutant may be resolved by referencing earlier findings in the SWP3. Background concentrations maybe identified by laboratory analyses of samples of stormwater runon to the permitted facility,by laboratory analyses of samples of stormwater run-off from adjacent non-industrial areas, or by identifying the pollutant is a naturally occurring material in soils at the site. Section B. Best Management Practices (BMPs) and SWP3 Requirements Minimum SWP3 Requirements—The following are required in addition to other SWP3 requirements listed in this general permit(including,but not limited to Part III.F.7. of this permit): i. Description of Potential Pollutant Sources-The SWP3 must provide a description of potential sources(activities and materials) that may reasonably be expected to affect the quality of stormwater discharges associated with concrete batch plants authorized under this permit. The SWP3 must describe practices that that will be used to reduce the pollutants in these discharges to assure compliance with this general permit, including the protection of water quality, and must ensure the implementation of these practices. The following must be developed, at a minimum,in support of developing this description: (a) Drainage—The site map must include the following information: (1) the location of all outfalls for stormwater discharges associated with concrete batch plants that are authorized under this permit; (2) a depiction of the drainage area and the direction of flow to the outfall(s); (3) structural controls used within the drainage area(s); (4) the locations of the following areas associated with concrete batch plants that are exposed to precipitation:vehicle and equipment maintenance activities(including fueling, repair, and storage areas for vehicles and equipment scheduled for maintenance); areas used for the treatment, storage, or disposal of wastes;liquid storage tanks; material processing and storage areas; and loading and unloading areas; and (5) the locations of the following: any bag house or other dust control device(s); recycle/sedimentation pond, clarifier or other device used for the treatment of facility wastewater(including the areas that drain to the treatment device); areas with significant materials; and areas where major spills or leaks have occurred. (b) Inventory of Exposed Materials—A list of materials handled at the concrete batch plant that maybe exposed to stormwater and that have a potential to Page 37 Construction General Permit TPDES General Permit TXRi50000 affect the quality of stormwater discharges associated with concrete batch plants that are authorized under this general permit. (c) Spills and Leaks-A list of significant spills and leaks of toxic or hazardous pollutants that occurred in areas exposed to stormwater and that drain to stormwater outfalls associated with concrete batch plants authorized under this general permit must be developed,maintained, and updated as needed. (d) Sampling Data-A summary of existing stormwater discharge sampling data must be maintained,if available. 2. Measures and Controls-The SWP3 must include a description of management controls to regulate pollutants identified in the SWP3's"Description of Potential Pollutant Sources"from Part IV.B.i.(a) of this permit, and a schedule for implementation of the measures and controls. This must include, at a minimum: (a) Good Housekeeping-Good housekeeping measures must be developed and implemented in the area(s) associated with concrete batch plants. (1) Operators must prevent or minimize the discharge of spilled cement, aggregate(including sand or gravel), settled dust, or other significant materials from paved portions of the site that are exposed to stormwater. Measures used to minimize the presence of these materials may include regular sweeping or other equivalent practices. These practices must be conducted at a frequency that is determined based on consideration of the amount of industrial activity occurring in the area and frequency of precipitation, and shall occur at least once per week when cement or aggregate is being handled or otherwise processed in the area. (2) Operators must prevent the exposure of fine granular solids, such as cement,to stormwater.Where practicable, these materials must be stored in enclosed silos,hoppers or buildings, in covered areas, or under covering. (b) Spill Prevention and Response Procedures-Areas where potential spills that can contribute pollutants to stormwater runoff, and the drainage areas from these locations, must be identified in the SWP3. Where appropriate,the SWP3 must specify material handling procedures, storage requirements,and use of equipment. Procedures for cleaning up spills must be identified in the SWP3 and made available to the appropriate personnel. (c) Inspections-Qualified facility personnel(i.e., a person or persons with knowledge of this general permit,the concrete batch plant, and the SWP3 related to the concrete batch plant(s)for the site)must be identified to inspect designated equipment and areas of the facility specified in the SWP3.The inspection frequency must be specified in the SWP3 based upon a consideration of the level of concrete production at the facility,but must be a minimum of once per month while the facility is in operation.The inspection must take place while the facility is in operation and must, at a minimum,include all areas that are exposed to stormwater at the site, including material handling areas,above ground storage tanks,hoppers or silos,dust collection/containment systems, truck wash down and equipment cleaning areas. Follow-up procedures must be used to ensure that appropriate actions are taken in response to the inspections. Records of inspections must be maintained and be made readily available for inspection upon request. (d) Employee Training-An employee training program must be developed to educate personnel responsible for implementing any component of the SWP3, or personnel otherwise responsible for stormwater pollution prevention,with the provisions of the SWP3. The frequency of training must be documented in Page 38 Construction General Permit TPDES General Permit TXRi50000 the SWP3, and at a minimum, must consist of one training prior to the initiation of operation of the concrete batch plant. (e) Record Keeping and Internal Reporting Procedures-A description of spills and similar incidents,plus additional information that is obtained regarding the quality and quantity of stormwater discharges, must be included in the SWP3. Inspection and maintenance activities must be documented and records of those inspection and maintenance activities must be incorporated in the SWP3. (f) Management of Runoff-The SWP3 shall contain a narrative consideration for reducing the volume of runoff from concrete batch plants by diverting runoff or otherwise managing runoff,including use of infiltration, detention ponds, retention ponds, or reusing of runoff. 3. Comprehensive Compliance Evaluation—At least once per year, one or more qualified personnel(i.e., a person or persons with knowledge of this general permit, the concrete batch plant, and the SWP3 related to the concrete batch plant(s)for the site) shall conduct a compliance evaluation of the plant. The evaluation must include the following. (a) Visual examination of all areas draining stormwater associated with regulated concrete batch plants for evidence of,or the potential for,pollutants entering the drainage system. These include but are not limited to: cleaning areas, material handling areas, above ground storage tanks,hoppers or silos, dust collection/containment systems, and truck wash down and equipment cleaning areas. Measures implemented to reduce pollutants in runoff(including structural controls and implementation of management practices)must be evaluated to determine if they are effective and if they are implemented in accordance with the terms of this permit and with the permittee's SWP3. The operator shall conduct a visual inspection of equipment needed to implement the SWP3, such as spill response equipment. (b) Based on the results of the evaluation,the following must be revised as appropriate within two weeks of the evaluation: the description of potential pollutant sources identified in the SWP3 (as required in Part IV.B.i., "Description of Potential Pollutant Sources"); and pollution prevention measures and controls identified in the SWP3 (as required in Part IV.B.2., "Measures and Controls"). The revisions may include a schedule for implementing the necessary changes. (c) The permittee shall prepare and include in the SWP3 a report summarizing the scope of the evaluation,the personnel making the evaluation, the date(s) of the evaluation, major observations relating to the implementation of the SWP3, and actions taken in response to the findings of the evaluation. The report must identify any incidents of noncompliance. Where the report does not identify incidences of noncompliance,the report must contain a statement that the evaluation did not identify any incidence(s), and the report must be signed according to 3o TAC§305.128, relating to Signatories to Reports. (d) The Comprehensive Compliance Evaluation may substitute for one of the required inspections delineated in Part IV.B.2.(c) of this general permit. Section C. Prohibition of Wastewater Discharges Wastewater discharges associated with concrete production including wastewater disposal by land application are not authorized under this general permit. These wastewater discharges must be authorized under an alternative TCEQ water quality permit or otherwise disposed of in an authorized manner. Discharges of concrete truck wash out at construction sites maybe authorized if conducted in accordance with the requirements of Part V of this general permit. Page 39 Construction General Permit TPDES General Permit TXR150000 Part V. Concrete Truck Wash Out Requirements This general permit authorizes the wash out of concrete trucks at construction sites regulated under Sections II.E.i., 2.,and 3. of this general permit,provided the following requirements are met. Authorization is limited to the land disposal of wash out water from concrete trucks. Any other direct discharge of concrete production waste water must be authorized under a separate TCEQ general permit or individual permit. 1. Direct discharge of concrete truck wash out water to surface water in the state, including discharge to storm sewers,is prohibited by this general permit. 2. Concrete truck wash out water shall be discharged to areas at the construction site where structural controls have been established to prevent direct discharge to surface waters, or to areas that have a minimal slope that allow infiltration and filtering of wash out water to prevent direct discharge to surface waters. Structural controls may consist of temporary berms,temporary shallow pits,temporary storage tanks with slow rate release, or other reasonable measures to prevent runoff from the construction site. 3. Wash out of concrete trucks during rainfall events shall be minimized. The direct discharge of concrete truck wash out water is prohibited at all times, and the operator shall insure that its BMPs are sufficient to prevent the discharge of concrete truck wash out as the result of rainfall or stormwater runoff. 4. The discharge of wash out water must not cause or contribute to groundwater contamination. 5. If a SWP3 is required to be implemented,the SWP3 shall include concrete wash out areas on the associated site map. Part VI. Retention of Records The permittee must retain the following records for a minimum period of three(3)years from the date that a NOT is submitted as required by Part II.E.3. For activities in which an NOT is not required, records shall be retained for a minimum period of three (3)years from the date that the operator terminates coverage under Section II.F.3. of this permit. Records include: 1. A copy of the SWP3; 2. All reports and actions required by this permit,including a copy of the construction site notice; 3. All data used to complete the NOI,if an NOI is required for coverage under this general permit; and 4. All records of submittal of forms submitted to the operator of any MS4 receiving the discharge and to the secondary operator of a large construction site,if applicable. Part VII. Standard Permit Conditions 1. The permittee has a duty to comply with all permit conditions. Failure to comply with any permit condition is a violation of the permit and statutes under which it was issued, and is grounds for enforcement action,for terminating, revoking, or denying coverage under this general permit, or for requiring a discharger to apply for and obtain an individual TPDES permit. 2. Authorization under this general permit may be suspended or revoked for cause. Filing a notice of planned changes or anticipated non-compliance by the permittee does not stay any permit condition. The permittee must furnish to the executive director, upon request and within a reasonable time, any information necessary for the executive director to determine whether cause exists for revoking, suspending, or Page 4o Construction General Permit TPDES General Permit TXR150000 terminating authorization under this permit. Additionally,the permittee must provide to the executive director, upon request, copies of all records that the permittee is required to maintain as a condition of this general permit. 3. It is not a defense for a discharger in an enforcement action that it would have been necessary to halt or reduce the permitted activity to maintain compliance with the permit conditions. 4. Inspection and entry shall be allowed under TWC Chapters 26-28,Texas Health and Safety Code§§361.032-361.033 and 361.037, and 4o CFR§122.41(i).The statement in TWC§26.014 that commission entry of a facility shall occur according to an establishment's rules and regulations concerning safety,internal security, and fire protection is not grounds for denial or restriction of entry to any part of the facility or site,but merely describes the commission's duty to observe appropriate rules and regulations during an inspection. 5. The discharger is subject to administrative, civil, and criminal penalties,as applicable,under TWC Chapter 7 for violations including but not limited to the following: (a) negligently or knowingly violating the federal CWA§§3o1, 302, 306, 307, 308, 318, or 405,or any condition or limitation implementing any sections in a permit issued under CWA§402, or any requirement imposed in a pretreatment program approved under CWA§§4o2(a)(3) or 402(b)(8); (b) knowingly making any false statement, representation,or certification in any record or other document submitted or required to be maintained under a permit, including monitoring reports or reports of compliance or noncompliance; and (c) knowingly violating§303 of the federal CWA, and placing another person in imminent danger of death or serious bodily injury. 6. All reports and other information requested by the executive director must be signed by the person and in the manner required by 3o TAC§305.128 (relating to Signatories to Reports). 7. Authorization under this general permit does not convey property or water rights of any sort and does not grant any exclusive privilege. 8. The permittee shall take all reasonable steps to minimize or prevent any discharge in violation of this permit that has a reasonable likelihood of adversely affecting human health or the environment. 9. The permittee shall at all times properly operate and maintain all facilities and systems of treatment and control(and related appurtenances)which are installed or used by the permittee to achieve compliance with the conditions of this permit. Proper operation and maintenance also includes adequate laboratory controls and appropriate quality assurance procedures.This provision requires the operation of back-up or auxiliary facilities or similar systems which are installed by a permittee only when the operation is necessary to achieve compliance with the conditions of the permit. 10. The permittee shall comply with the reporting requirements in 4o CFR§122.41(1), as applicable. Part VIII. Fees 1. A fee of must be submitted along with the NOI: (a) $325 if submitting a paper NOI, or (b) $225 if submitting an NOI electronically. Page 41 Construction General Permit TPDES General Permit TXR150000 2. Fees are due upon submission of the NOI. An NOI will not be declared administratively complete unless the associated fee has been paid in full. 3. No separate annual fees will be assessed for this general permit. The Water Quality Annual Fee has been incorporated into the NOI fees as described above. Page 42 Construction General Permit TPDES General Permit TXR150000 Appendix A: Automatic Authorization Periods of Low Erosion Potential by County— Eligible Date Ranges Andrews: Nov. 15 -Apr. 3o Ector: Nov. 15 -Apr. 30 Archer: Dec. 15 -Feb. 14 Edwards: Dec. 15-Feb. 14 Armstrong: Nov. 15-Apr. 3o El Paso: Jan. 1-Jul. 14, or May 15-Jul. Bailey: Nov. 1-Apr. 30, or Nov. 15 -May 31,or Jun. 1-Aug. 14,or Jun. 15-Sept. 14, or Jul. 1-Oct. 14, or Jul. 15- Oct. 31, or 14 Aug. 1-Apr. 30, or Aug. 15-May 14,or Baylor: Dec. 15-Feb. 14 Sept. 1-May 30, or Oct. 1-Jun. 14,or Borden: Nov. 15-Apr. 3o Nov. 1 -Jun. 30, or Nov. 15-Jul. 14 Brewster: Nov. 15 -Apr. 30 Fisher: Dec. 15 -Feb. 14 Briscoe: Nov. 15 -Apr. 30 Floyd: Nov. 15-Apr. 30 Foard: Dec. 15-Feb. 14 Brown: Dec. 15-Feb. 14 Callahan: Dec. 15 -Feb. 14 Gaines: Nov. 15 Apr. 30 Carson: Nov. 15-Apr. 30 Garza: Nov. 15 -Apr. 30 Castro: Nov. 15 Apr. 3o Glasscock: Nov. 15 -Apr. 30 Childress: Dec. 15-Feb. 14 Hale: Nov. 15 Apr. 30 Cochran: Nov. 1-Apr. 30, or Nov. 15 - Hall: Feb. 1 -Mar. 30 May 14 Hansford: Nov. 15 -Apr. 30 Coke: Dec. 15 -Feb. 14 Hardeman: Dec. 15 -Feb. 14 Coleman: Dec. 15 -Feb. 14 Hartley: Nov. 15-Apr. 30 Collingsworth: Jan. 1-Mar. 30, or Dec. 1 - Haskell: Dec. 15 -Feb. 14 Feb. 28 Hockley: Nov. 1 -Apr. 14, or Nov. 15 - Concho: Dec. 15-Feb. 14 Apr. 30 Cottle: Dec. 15 -Feb. 14 Howard: Nov. 15 -Apr. 30 Crane: Nov. 15-Apr. 3o Hudspeth: Nov. 1-May 14 Crockett: Nov. 15-Jan. 14, or Feb. 1- Hutchinson: Nov. 15-Apr. 30 Mar. 3o Irion: Dec. 15-Feb. 14 Crosby: Nov. 15 -Apr. 3o Jeff Davis: Nov. 1 -Apr. 30 or Nov. 15 - Culberson: Nov. 1-May 14 May 14 Dallam: Nov. 1-Apr. 14,or Nov. 15 -Apr. Jones: Dec. 15-Feb. 14 30 Kent: Nov. 15 -Jan. 14 or Feb. 1-Mar. 30 Dawson: Nov. 15-Apr. 3o Kerr: Dec. 15-Feb. 14 Deaf Smith: Nov. 15 -Apr. 3o Kimble: Dec. 15 -Feb. 14 Dickens: Nov. 15 -Jan. 14, or Feb. 1-Mar. King: Dec. 15 -Feb. 14 30 Kinney: Dec. 15 -Feb. 14 Dimmit: Dec. 15-Feb. 14 Donley: Jan. 1-Mar. 30, or Dec. 1-Feb. Knox: Dec. 15 -Feb. 14 28 Lamb: Nov. 1-Apr. 14,or Nov. 15 -Apr. Eastland: Dec. 15-Feb. 14 30 Page 43 Construction General Permit TPDES General Permit TXRi50000 Loving: Nov. 1-Apr. 30,or Nov. 15 -May Scurry: Nov. 15 -Apr. 30 �4 Shackelford: Dec. 15-Feb. 14 Lubbock: Nov. 15-Apr. 3o Sherman: Nov. 15-Apr. 30 Lynn: Nov. 15 -Apr. 3o Stephens: Dec. 15-Feb. 14 Martin: Nov. 15 -Apr. 3o Sterling: Nov. 15-Apr. 30 Mason: Dec. 15 -Feb. 14 Stonewall: Dec. 15 -Feb. 14 Maverick: Dec. 15-Feb. 14 Sutton: Dec. 15 -Feb. 14 McCulloch: Dec. 15-Feb. 14 Swisher: Nov. 15 -Apr. 30 Menard: Dec. 15 -Feb. 14 Taylor: Dec. 15 -Feb. 14 Midland: Nov. 15-Apr. 3o Terrell: Nov. 15 -Apr. 30 Mitchell: Nov. 15-Apr. 3o Terry: Nov. 15-Apr. 30 Moore: Nov. 15 -Apr. 3o Throckmorton: Dec. 15 -Feb. 14 Motley: Nov. 15-Jan. 14, or Feb. 1-Mar. Tom Green: Dec. 15 Feb. 14 30 Nolan: Dec. 15-Feb. 14 Upton: Nov. 15 -Apr. 30 Uvalde: Dec. 15-Feb. 14 Oldham: Nov. 15-Apr. 30 Val Verde: Nov. 15-Jan. 14, or Feb. 1- Parmer: Nov. 1-Apr. 14, or Nov. 15 -Apr. Mar. 30 30 Ward: Nov. 1-Apr. 14,or Nov. 15 -Apr. Pecos: Nov. 15-Apr. 30 30 Potter: Nov. 15 -Apr. 3o Wichita: Dec. 15 -Feb. 14 Presidio: Nov. 1-Apr. 30, or Nov. 15 - Wilbarger: Dec. 15 -Feb. 14 May 14 Randall: Nov. 15 -Apr. 3o Winkler: Nov. 1-Apr. 30, or Nov. 15 - May 14 Reagan: Nov. 15-Apr. 3o Yoakum: Nov. 1-Apr. 30,or Nov. 15- Real: Dec. 15 -Feb. 14 May 14 Reeves: Nov. 1-Apr. 30,or Nov. 15 -May Young: Dec. 15 -Feb. 14 �4 Wheeler: Jan. 1-Mar. 30, or Dec. 1-Feb. Runnels: Dec. 15-Feb. 14 28 Schleicher: Dec. 15 -Feb. 14 Zavala: Dec. 15 -Feb. 14 Page 44 Construction General Permit TPDES General Permit TXR150000 Appendix B: Erosivity Index(EI)Zones in Texas ;tea -aa�as�iar .,. li'1R� {� � �� aa• "'�` 1' a r .."' ' 1 '"q� 4 I I . •!F x"-i tie ".s. n a a a L F�i �� 4' saue•m s-�.�v a.444 444 44%P. a r ; � . a.a r i� � �, p i s a i 4 a a 1 i *•*-ilk .., .. *,* I id asY i, £ .a a R a are *la- ,` " a < a ^�R 41tr : I6 f$ ,'l4 a e w x xa a. Id . ;; }. i •.� •d9X!„� .9 c y r a Y:a i>s-r#r a 1p.•a. a• �—' —me a a,:�: 1R . a,i �,w.i t 1 F. -. :r r i i TI 4{,a .ate ee. +# # a a nay a g"S ` ! #* ti _ r n as.a a n .�a eae ww am law mil s ra a e ••=•q a..a r.r r r s$ a�:� ann maa eu a °' a s o i a a ® .* ' � 3e,e�+a€a�aa a�a�a.•a�a�s�s ate, ■� .�. s x a ”' � � •!!�i a•' . a a a a s a . +. t.n, ..ar^° r a• ," .•,a ! �:ana cI r s.,�„ aaar aa— • I.ii�"F 111 a c aa�aa.a iz $ n a __ __ .. cam. 77 7ih�ari e " a. .'> ue.1. a a a.4. 1F R , } ear �. i r.::.i-. * 3- a r erx as a ,,+£,an,.....•nea zean+ s < r' ct :.ily ma Saar a en+w•� ae+ . ' N . x `T 4.•; • •. can—aaae—!Rw'+11!dP'l :is h , .. • rrre g. . L1 Adapted from Chapter 2 of USDA Agriculture Handbook 703: `Predicting Soil Erosion by Water:A Guide to Conservation Planning With the Revised Universal Soil Loss Equation(RUSLE),"U.S.Department of Agriculture,Agricultural Research Service Page 45 Construction General Permit TPDES General Permit TXRi50000 Appendix C: Isoerodent Map IIPP' 111 Nei` it itd.� t hi d $ ra I . PAW 1 iii ittaka4 mi,—4.70601111 iliiNgitati.'---1 4"obi rim min martillikrOilir"4111"41111 k r! 'Ittmi. vsvr '" s.�,�, -WIC'' 0 .„ , ., i r�� 11 � '.:Porgy BAs dare . �, iii s k . 411104 AO ja Mira JP fp or .. Ivgar iirishimil r hip 00$1.,al 0404110 tiatIVP:t:_, ir 1 1 42 1111 I 1 11111P4.1 I 1 101' 140 Oil V 10' :Al111 falli 1101074114,11#16 �► 00 S IP M Ifir Adapted from Chapter 2 of USDA Agriculture Handbook 703: `Predicting Soil Erosion by Water:A Guide to Conservation Planning With the Revised Universal Soil Loss Equation(RUSLE),"U.S.Department of Agriculture,Agricultural Research Service Page 46 Construction General Permit TPDES General Permit TXR150000 Appendix D: Erosivity Indices for EI Zones in Texas Periods: EI# i/i 1/16 1/31 2/15 3/1 3/i6 3/31 4/15 4/30 5/15 5/30 6/14 6/29 7/14 7/29 8/13 8/28 9/12 9/27 10/12 10/2711/11 11/26 12/11 12/31 89 0 1 1 2 3 4 7 2 8 27 38 48 55 62 69 76 83 90 94 97 98 99 loo loo loo 90 0 1 2 3 4 6 8 13 21 29 37 46 54 6o 65 69 74 81 87 92 95 97 98 99 loo 91 0 0 0 0 1 1 1 2 6 16 29 39 46 53 6o 67 74 81 88 95 99 99 loo loo loo 92 0 0 0 0 1 1 1 2 6 16 29 39 46 53 6o 67 74 81 88 95 99 99 100 100 loo 93 0 1 1 2 3 4 6 8 13 25 40 49 56 62 67 72 76 8o 85 91 97 98 99 99 loo 94 0 1 2 4 6 8 10 15 21 29 38 47 53 57 61 65 7o 76 83 88 91 94 96 98 loo 95 0 1 3 5 7 9 11 14 18 27 35 41 46 51 57 62 68 73 79 84 89 93 96 98 loo 96 0 2 4 6 9 12 17 23 30 37 43 49 54 58 62 66 70 74 78 82 86 90 94 97 loo 97 0 1 3 5 7 10 14 20 28 37 48 56 61 64 68 72 77 81 86 89 92 95 98 99 loo 106 0 3 6 9 13 17 21 27 33 38 44 49 55 61 67 71 75 78 81 84 86 90 94 97 loo Each period begins on the date listed in the table above and lasts until the day before the following period. The final period begins on December 11 and ends on December 31. Table adapted from Chapter 2 of USDA Agriculture Handbook 703: `Predicting Soil Erosion by Water:A Guide to Conservation Planning With the Revised Universal Soil Loss Equation(RUSLE),"U.S.Department of Agriculture, Agricultural Research Service Page 47