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L <br /> E. <br /> was transported under chain of custody to FGL Laboratory with <br /> instructions to test for BTEX (EPA 8020 , ) & TPH-G (EPA 8025M. ) <br /> The 5 samples from the spoil piles were to be composited into 3 <br /> for analysis; in addition to BTEX & TPH--G, they were to be tested <br /> for total lead. The results of the analyzes on those samples is <br /> summarized on TABLE II; copies of the laboratory results, QA/QC, <br /> & chain of custody are included as EXHIBIT D. <br /> On December 21, 1994, the excavation was filled with 120 tons, <br /> (approximately 75 cubic yards, ) of clean 5/16 x 1/8 gravel under <br /> the direction of Jim Thorpe Oil personal; copies of the load <br /> tickets are included as EXHIBIT F. On December 23, the gravel <br /> was covered with 4" of concrete and the site restored to it' s <br /> original condition. <br /> On December 21, 1994, Del-Tech Geotechnical measured water levels <br /> all three monitoring wells, and sampled MW-1 & MW--2. The results <br /> of the analyzes of the water samples are summarized on TABLE I; <br /> only MW-2 showed any BTEX or TPH-G. Copies of the laboratory <br /> reports & chain of custody are included in EXHIBIT E. The water <br /> table has dropped about 1 . 33 feet since the sampling event in <br /> • September, to an average depth of 14. 77' bgl, or -5. 96'msl . The <br /> gradient is to the north at about 0. 1 ' per foot. Except for the <br /> September sampling, the gradient has been rather consistently to <br /> the north. PLATE VI shows the hydraulic gradient as measured in <br /> December, together with the prior gradients measured to date on <br /> the property. <br /> Monitoring well #2, which is directly downgradient from the site <br /> of the removed UST, is the only well which has recorded BTEX & <br /> TPH-G; both 4W-1 & MW-3 have been below detection limits. Per <br /> approval of the San Joaquin County EHD, MW-3 was not sampled this <br /> event. <br /> When Don Light of Del-Tech Geotechnical arrived on location for <br /> the December sampling, he was instructed by Steve Sasson of the <br /> County EHD to have the water samples from MWS analyzed for <br /> purgeable halocarbons, (EPA 601 ; ) the reason for that request was <br /> not given. Results of that test revealed that 1, 2-dicholorethane <br /> was present in MW-2 at 0.07 ug/L; Trichloroethene was detected in <br /> 1W-1 at 2. 4 ug/L, and in , W-2 at 5.0 ug/L; and Tetracholorethene <br /> was detected in MW-1 at 31 . 0 ug/L & 22.0 ug/L in MW-2. All other <br /> compounds were below detection limits. The source of those <br /> constituents are not known. <br /> On Jan 24, 1995, the contaminated soil which had been stored in <br /> the empty building adjacent to the removed UST was taken to <br /> Forward, ,Inc. , for disposal. Copies of the non-hazardous waste <br /> 5 <br />