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25 August 1999 <br /> • AGE-NC Protect No 98-0448 <br /> Page 2 of 10 <br /> 2 1 1 Soil Sample,Collection <br /> Discrete soil samples were collected at 5-foot intervals beginning at 10 feet bsg from soil boring <br /> IMW-8, soil samples were collected at 15, 20, 25 and 45 feet bsg from EW-1 Soil samples were <br /> collected utilizing a California split-spoon sampler loaded with 2-inch by 6-inch brass sleeves The <br /> I sampler was driven by dropping a 140-pound weight from a height of 30 inches The number of <br /> blows required to drive each 6-inch length of the sampler(blow counts) was recorded on boring logs <br /> by an AGE geologist <br /> Soil samples were preserved by covering both ends of the second brass sleeve with Teflon sheets, <br /> capping and sealing with tape Each preserved sample sleeve was labeled with soil boring location, <br /> depth, time, date and sampler's initials <br /> Each preserved sample was logged on a chain-of-custody form, placed in a chilled container and <br /> transported to a California Department of Health Services (DHS)-certified laboratory for analysis <br /> of <br /> o Total petroleum hydrocarbons quantified as gasoline(TPH-g)by EPA Method 5030/8015M, <br /> a Volatile aromatic compounds , benzene, toluene, ethylbenzene and xylene (BTEX) with <br /> methyl-tertiary butyl ether (MTBE) by EPA Method 8020, and <br /> • Tertiary butanol (TBA), di-isopropyl ether (D1PE), ethyl tert butyl ether (ETBE), tert amyl <br /> methyl ether (TAME), and confirmation of MTBE by EPA Method 8260 Modified <br /> The results of the soil analyses are tabulated in Table 1 <br /> Two selected soil samples (MW-8 and EW-1 at 25 feet bsg) were submitted to A Keith Kaufman <br /> for microbial enumeration and physicochemical analysis to determine feasibility of bioremediation <br /> at the site <br /> 2 1 2 Equipment Decontamination <br /> The hollow stem augers were steam cleaned prior to each bore hole advancement Sampling tools <br /> and brass sleeves used for sample collection were thoroughly washed with a solution of Alconox, <br /> and were thoroughly rinsed with clean tap water prior to each sampling run Following drilling <br /> activities, nnseate`generated from decontaminating the equipment was placed in properly labeled <br /> D O T -approved model 17H 55-gallon drums and was stored at the site in an area lacking public <br /> • access <br /> Ad arced GcoEnvironmenial,Inc <br />