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04 August 2000 <br /> • AGE-NC Project No 97-0300 <br />' Page 2of10 <br />' 2 1 DRILLING AND SAMPLING <br /> Soil boring P-7 and soil bonng/monitonng wells MW-1, MW-2 and MW-3 were advanced on-site <br />' as part of site assessment activities related to the former USTs at the site Soil boring P-7 was <br /> advanced vertically to a total depth of 65 feet below surface grade (bsg), soil boring MW-I was <br /> advanced to 60 feet bsg and soil borings MW-2 and MW-3 were advanced vertically to depths of 55 <br />' feet bsg The soil borings were advanced utilizing a CME-75 high torque, truck-mounted drill rig <br /> equipped with 8-inch diameter hollow-stem augers Soil cuttings were stockpiled on and covered by <br /> plastic sheeting at the site, the soil boring and monitoring well locations are depicted in Figure 2 <br /> 2 1 1 Soil Sample Collection <br /> I Discrete soil samples were collected at 5-foot intervals beginning <br /> pat 5 feet bsg from soil borings <br />' MW-1, MW-2 and MW-3, soil samples were collected at 5-foot intervals beginning at 35 feet bsg <br /> from soil boring P-7 Soil samples were collected utilizing a California split-spoon sampler loaded <br /> with 2-inch by 6-inch brass sleeves The sampler was driven by dropping a 140-pound weight from <br /> a height of 30 inches The number of blows required to drive each 6-inch length of the sampler(blow <br /> counts) was recorded on boring logs by an AGE staff geologist <br /> I 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 /> IEach 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 /> for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d, <br /> Irespectively) by EPA Method 5030/8015M, <br /> • Volatile aromatic compounds benzene, toluene, ethylbenzene and xylene (BTEX) with <br /> Imethyl-tertiary butyl ether (MTBE) by EPA Method 8020, and <br /> • Methanol, ethanol, ethylene dibromide (EDB), 1,2-dichloroethane (1,2-DCA), tertiary <br /> I butanol (TBA), di-isopropyl ether (DIPE), ethyl tort butyl ether (ETBE), tort amyl methyl <br /> ether (TAME), and confirmation of MTBE by EPA Method 8260 Modified <br /> The results of the soil analyses are contained in Tables 1 and 2 <br /> • <br /> Advanced GeoEnvnronmental,Inc <br />