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S I _ <br /> J I <br /> r <br /> 24 October 1997 <br /> AGE-NC Project No 96-0235 <br /> Page 3 of 1 I <br /> , <br /> soil stockpile The samples were-collected utilizing a metric soil sampler loaded with 2 pre-cleaned _ <br />' brass sleeves The ends of the lead sleeve were covered with Teflon sheets, capped and sealed with <br /> tape The samples were then labeled, stored on ice and transported under chain-of-custody to , <br /> McCampbell Analytical Inc (MAI), a state-certified laboratory w <br />' The stockpiled soil was g <br /> sampled again on 08 November Wto <br /> determine whether the soil could <br /> p <br /> be utilized as back-fill material for the excavation The'sampling method was as described above for <br />' the 25 June 1996 sampling event <br /> The preserved soil samples were labeled, logged on a chain of custody form and transported under <br /> chain-of-custody to MAI in a chilled container <br /> Samples collected on 25 June 1996w <br /> analyzed for TPH-g and BTE&X Samples collected on 08 November 1996 were analyzed for TPH-g, TPH as diesel (TPH-d), BTE&X and total recoverable <br /> petroleum hydrocarbons as oil and grease (TRPH) <br /> y , <br /> 52 RESULTS <br /> TPH-g was detected in the analysis of the 25 June 1996 composite of samples SS-1, SS-2 and SS-3 <br /> at a concentration of 2 5,parts per million (ppm,reported as milligrams per kilogram) The composite <br /> of samples SS-4 through SS-7 yielded 1 3 ppm TPH-g The composite of SS-8 through SS-11 <br /> contained 1 1 ppm TPH-g <br /> The 08 November 1996 soil samples contained Y6 ppm to 70 ppm TPH-d and 23 ppm to 550 ppm <br /> TRPH, but-did riot contain detectable concentrations of TPH-g or BTE&X The results of the <br /> analyses are tabulated in Tables 4 and 5 Copies of the laboratory reports (MAI Sample Nos 66300 <br /> through 66302 and 71025 through 71036), quality control reports and chain-of-custody forms are <br /> included in Appendix A ` <br /> 6 0. BACKFILLING EXCAVATION t <br /> The basic plan for backfiiling of the UST excavation was communicated to Mr Steve Sasson of the <br /> PHS-EHD by letter from-AGE dated 07 April 1997 In brief, sufficient imported backfill material <br /> was to be brought in and utilized to fill the lower 5 feet of the excavation, after which stockpiled soil <br /> on-site was to be utilized to complete the backfill procedure The area was to be paved with asphalt <br /> following completion of the backfill <br /> I <br /> Backfilling of the excavation took place in April 1997 and was performed by DSS Construction <br /> Advanced GeoEnNironmentai,Inc <br /> n <br />