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Villages C P2-CS 860825 PIERCE-LUNSFORD ASSO TES, INIC. CONSULTING ENGINEERS Ref. No. 515348.10 CF BL8256 August 25, 1986 RECEIVED Mr. Bob Lenz I)alcon Services, Inc. ;'639 Waln~t ttill lane, #217 I}al las, l'X 15229 C(JN~JUL. IJNG Subject: Water, Sanitary Sewer and Storm Drainage Improvements Villages of Coppe11, Phase Two Coppell M.U.D. No. 1 Coppe11, Texas Dear Mr. Lenz: This letter is a follow up to the meeting held on August 21, 1986 at the above subject project. The meeting which was attended by Bob Lenz, Randy McClelland and Ramone of Dalcon and Jeff Hawkins and Brad Williams of Pierce-Lunsford. As the District's Engineer for Coppe11 M.U.D. No. 1, Pierce-Lunsford expressed concern to you and other Dalcon employees as to the progress, performance and workmanship of crews performing work on the above subject project. Though some progress has been made in correcting deficiencies recognized during execution of the work, you are now well beyond the contract time allowed for in the contract documents. The deficiencies listed below were discussed at the meeting and require immediate attention by Dalcon and subcontractors to get the project to a level which is acceptable before completing water line installation and beginning utility line testing for the Villages of Coppell, Phase Two Project. Sanitary Sewer Deficiencies: 1. We discussed a number moisture and soil compacticn tests performed by Duval and Associates on sanitary sewer lines which have never met utility line backfill specification requirements. From on-site observations by representatives of Pi erce-Lunsford and Duval Testing LaboratOry, it appears that the backfill was placed in lifts too thick to get uniform compaction in the ditch lines, and that the amount of water added during compaction was insuf, ficient. The existing backfill must be removed and recompacted to specified soil density and opt imam moisture requirements. The cost of all retests required to check densities in areas which did not originally satisf/ minimum compaction and moisture requirements are tY.e responsibility of the Contractor per Article 1.42.3 of the North Central Texas Counci 1 of Governments St andard Specifications. You may have the samples retested by Dural 3109 CARLISLE, SUITE 206 DALLAS, TEXAS 75204 ARLINGTC,:,, TEXAS '~C' '-' Mr. Bob Lenz August 25, 1986 page 2 2. All precast or cast-in-place manholes need to be in place before any testing of sanitary sewer lines can be performed. It is common practice on utility construction projects for manhole placement to occur simultaneously with sanitary sewer construction. Each time I have inquired as t~ tile sch(~dule f(~r manh~)le t)lacement, ! have been told the ~ndni~ule crew would be inuviflg of~ wiLilin the week, but manholes have been placed to date. You should begin construction of the manholes immediately as discussed in our meeting. 3. All 4" sanitarY sewer service lines to lots in the subdivision which were left off during construction of the only partially extended to avoid conflicts with proposed storm sewer lines need to be extended to the street R.O.W. Service to each lot must be verified by Dalcon and Pi erce-Lunsford. Sewer tape must be extended from the end of t'he sewer lateral to the natural ground and staked. The Contractor must provide "field ties" of all sanitary sewer services to fixed points such as manholes and/or lot corners for preparation of "as-built" plans as provided in Special Conditions to the Contract Documents. Any other changes or deviations during construction of the utility lines must also be noted. 4. After the items listed above are completed and accepted, all sanitary sewer mains must be mandriled then air tested in accordance with the standard specifications. STORM SEWER DEFICIENCIES: 1. We also discussed a number of moisture and soil compaction tests performed by Duval and Associates on storm sewer lines which do not meet utility line backfill specification requirements. The existing backfill must be removed and water added during the compaction process in order to satisfy minimum density and optimum moisture requirements. In addition, backfill on Storm Sewer Line "A" from Sra. 0+50 to 2+00 + was placed with native material instead of clean sand as-required in standard construction details. It must be removed, replaced with proper materials and compacted in accordance with plans and specifications. Mr. Bob Lenz August 25, 1986 page 3 2. Storm sewer lines must be flushed and cleaned of all mud, sand, excess joint sealant or other debris before acceptance can be made. Concrete col 1 ars at wye connections and pipe to pipe connections were not completed until some time after placement of tile storm sewer at these lr~c~ti~ns and t'hn ends ~f the pipe hav~~ nat, hee. n snc,~rr~d curb inlet locations. As a resu|t, sand and mud nas washed into the pipes and shall be removed as soon as possible to prevent further contamination of the system. 3. In the preconstruction conference for this project, it was agreed by Contractor, Owner and Developer that curb inlets would be cast-in-place and bottoms would be placed prior to move on of the paving contractor to facilitate drainage of the site and reduce contamination of the storm drainage system. Any variance to previous agreements will have be approved by these concerned parties. In addition to the items discussed above, I have reCeived notice that the company underwriting your comprehensive general liability insurance has cancelled your policy due to non-payment of premiums. Insurance must be reinstated before cancellation of the policy becomes effective in accordance with coverage requirements listed in the Special Conditions. I have been informed by Tom Burns of B & E Sand and Gravel that this company has supplied sand and rock for bedding and backfill for this project but has not been paid to date by Dalcon. Y.~u need to furnish satisfactory evidence that outstanding clains have been paid in accordance with section 3.13 of the General Contract Conditions. Because of the problems already encountered on this project a~,d the fact the project is beyond contract time limitations, budgeted costs including project observation, laboratory testing, contract and project administration are already higher th,n normal for a project of this size. Agreement will have to ~e reached on the amount of these expenses to be charged against contract amount before final payment will be authorized. I haYe reveiced no letter from you requesting an extension of time on the project, so ! assume you realize liquidated damages will ~e assessed at a rate of $150.00 per calendar day. Mr. Bob Lenz August 25, 1986 page 4 In the on-site meeting, it was agreed that immediate steps will be taken by Dalcon to alleviate the above listed deficiences and complete the work to a standard acceptable to all concerned parties. With the amount of work remaining and the state of she contract at the present time it is is imperative that you accomplish this in a timely manner. lu my k~uwledg~, no one has asked you to pertorm any operations not in accordance with plans and specifications or the City of Coppell subdivison ordinance. As the District's Engineer for the Coppell Municipal Utility District No. 1, we strive to work w~th the Developer, Contractor, City of Coppell officials and City Engineer toward the successful and timely completion of all projects. We expect Dalcon Services to do the same Dy carrying through with your commitment. Sincerely Yours, PIERCE-LUNSFORD ASSOCIATES, INC. /~1 ~'~'~ ' Jeffrey M. Hawkins, P.E. JMH/DB cc: Mr. Paul Phy- Legal Counsel for Coppell M.U.D. No. 1 Mr. Mark Kurtz - Dimensional/Brooks Ms. Janet Vick - Nathen D. Maier Engineers j?f Mr. Brad Williams - PLA