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' 25 October 2005 <br /> . AGE-NC Project No 02-0926 <br /> ' Page 3 of 7 <br /> Soil samples were collected from specified depth intervals (zones) based on the acquired CPT <br /> lithologic data indicating favorable conditions for sampling A steel-tipped soil sampler was pushed <br /> into the specified zone, then the tip was withdrawn to expose a core barrel, the soil sampler was <br /> pushed down again to retrieve a 1-foot soil sample Upon soil sample retrieval, a brass sleeve was <br /> ' removed from the sampler The ends of the brass sleeve were immediately covered with Teflon <br /> sheets, sealed with plastic end caps,and secured with tape <br /> ' Soil samples were collected from CPT boring locations at the following intervals <br /> ' CPT-3 was sampled between 64 feet and 65 feet bsg and between 74 feet and 75 feet bsg <br /> , <br /> Following collection,the soil and grab ground water samples were placed in a chilled container and <br /> ' transported under chain of custody procedures to Cal Tech Environmental Laboratories (CTEL), a <br /> State, of California Department of Health Services (DHS)-certified analytical laboratory in <br /> Paramount, California, and analyzed for the following constituents <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> respectively) in accordance with EPA Method 8015 Modified, and <br /> Benzene, toluene, ethylbenzene, and total xylenes (BTEX) and the fuel additives methyl <br /> tertiary-butyl ether (MTBE), dl-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), <br /> ttertiary-amyl methyl ether(TAME),tertiary-butyl alcohol(TBA), 1,2-dibromoethane(EDB) <br /> and 1,2-dichloroethane (1,2-DCA) in accordance with EPA Method 8260B <br /> All nnseate generated during drilling activities was containerized in properly labeled,DOT-approved <br /> 55-gallon drums Twinned soil borings were backfilled over their entire depths with a portland <br /> cement grout mix <br /> ' 3.0, FINDINGS <br /> Sol] descriptions from the computer-generated CPT hthologic logs were integrated with previous <br /> ' subsurface soil descriptions to construct the subsurface geologic model, cross section B-B' was <br /> constructed to depict the general lithology beneath the site (Figure 3) The hydrocarbon impact to <br /> ground water and soil was quantified by laboratory analysis of the ground water and soil samples <br /> 31 STRATIGRAPHY <br /> Generally, silt, clay, clayey silt,and silty clay were encountered in all three CPT soil borings from <br /> Advanced GcoEnvironmcntn1,Inc <br /> f <br />