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SWM-PS 980109ra W � Q ct vr,/^ �o, J 0 ' W N W W LL FREESE- NICHOLS 4055 International Plaza Suite 200 Fort Worth, Texas 76109 -4895 817/735 -7300 fir. Y:eP• +t'"sk.'th i*,!. Gr,if 'in, FAX 817/735 -7491 Assistant City Manager, http://www.freese.com 'ity Engineer City of Coppell P.O. Box 478 Coppell, TX 75019-0478 Important Dates to Rememaer:- Final regulation is scheduled to be issued by ................ ........ March 1, 1999 Permit application must be submitted by . ............................... August 7, 2001 Permits to be issued by the EPA Region 6 by .............................. 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Worth, TX Permit No. 191 P. L, •poo5 ISOW aql op UP3 li a.lagm ,iauoul agl puods uagl pun `uotlpu1UU;)l3p site 331tw `,Cpnls luat132uapui pags.Ialnm p uuojjad OI st uotlppuauluzooaa aup 'uotl - ngt.zluoo lulol aql do aapgs lugm pup wu sooanos uoilnllod oql wogAm jo a.inlotd olp.inoop 3JOUI P aultulalap of gowiddn luatuo5rupui pags.lalnm u uo si azisugdula aqj -pogslalpm p u1 Somnos uopnllod 5uoulu saililiq!suodsar loiluoo uotlnllod 5ui - Inoolln pup spzupuuls f%j!1 nb .ialum laaw of poonpoi aq of spaau lugl luulnllod p do lunouzn aql 5ui�jpods somnos lunlnllod 2uiingl.zluoo On January 9, 1998, the Environ- mental Protection Agency (EPA) formally proposed Phase II Storm Water Regulations. The EPA's continuing effort to protect the nation's natural waters has initiated the second phase to control storm water discharges. Under the pro- posal, cities with populations less than 100,000 fall into one of three categories: • Cities located in "Urbanized Areas" which must apply for NPDES permit authorization for their municipal separate storm sewer systems (MS4s) by May 31, 2002 • Cities with populations greater than 10,000 and population densities greater than 1,000 per square mile, which potentially may have to apply for NPDES permit authorization if required by the permitting authority (EPA Region 6 or the Texas Natural Resource Conservation Commis- sion) • All other cities, which will not be required to obtain NPDES permit authorization unless the permit authority expressly determines that a one is necessary to protect water quality. The'EPA has proposed to exempt cities in urbanized areas with populations less than 1,000 from the auto- matic permit requirements. However, to take advantage of this exemption, the city must prove, using sophisticated (and potentially expensive) water quality models, that its storm water discharge is not polluting the receiving streams The Phase I rules have had some measurable positive impact, particu- larly on construction site storm water control with respect to sediment. The Phase II proposal identifies two classes of facilities for automatic coverage on a nationwide basis under the NPDES program. These classes are: • Small municipal separate storm sewer systems • Construction activities disturbing one acre or more • Other industrial facilities and construction activities, as well as MS4s outside urbanized areas could be required to obtain permit coverage Under the proposed regulations, municipalities and municipally owned industrial facilities (previ- ously excluded) will have until August 7, 2001 to apply for permit coverage and until May 31, 2002 to obtain an NPDES municipal storm water general permit. To obtain a general NPDES permit, municipali- ties must file a Notice of Intent (NOI) with the permitting authority (EPA Region VI for this area), notifying them that they intend to obtain a general permit. Except under certain circumstances, the EPA's current policy recommends that numerical effluent limits not be included in the storm water permits. The proposed rules offer conditional exemption available to owners or operators of all categories of regulated industrial activity (except construction activity and those entities individually designated by the permitting authority) who can certify that industrial materials, material handling operations and industrial processes are not exposed to storm water. The proposed rules provide for an NPDES program that: • Encourages the use of general permits, which will significantly reduce permit application costs • Provides flexibility for munici- palities to determine the nature of storm water controls • Does not require extensive monitoring by the permittee • Provides flexibility in use of watershed approaches • Is consistent with the existing storm water Phase I program. • Recognizes and includes existing programs Utilizes the existing NPDES program, which is Federally enforceable Takes advantage of existing structures and mechanisms for public participation At a minimum the proposed regula- tion will require municipalities to develop, implement, and enforce a storm water management program designed to reduce the discharge of pollutants from small municipal separate storm sewer systems. A storm water management program must include the following mini- mum control measures: • Public involvement /participation • Public education and outreach on storm water impacts • Illicit discharge detection and elimination • Construction site storm water run off control • Post - construction storm water management in new development and redevelopment • Pollution prevention /good housekeeping for municipal operations Best management practices (BMP's) are generally the most appropriate methods to control effluent discharges. These methods should satisfy the technology requirements of reducing pollutants to the maximum extent practicable and the water quality -based require- ments of the Clean Water Act. The NPDES permitting authority will specify a time period of up to 5 years from the date of permit issuance for municipalities to fully develop and implement a program. The EPA is proposing that the states impose numerical effluent limits on storm water discharges in the context of developing Total Maxi- mum Daily Loads (TMDLs) for impaired water bodies — require- ments anticipated to be imposed within the next two years. TMDLs are a quantitative assessment of water quality problems and (over)