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i <br /> i � 26 October 2001 <br /> AGE-NC Project No 01-0839 <br /> Page 4 of 8 <br /> 3 2 SOIL SAMPLING <br /> Soil samples were collected from the borings at 5-foot intervals beginning at 20 feet bsg In boring <br /> B-1,at 40 feet bsg in boring B-2(to continue sampling at the depth B-1 was abandoned)and at 5 feet <br /> bsg in borings B-3, B-4 and B-5 to the total depth of the bonngs using a California split-spoon <br /> sampler loaded with three clean 2-inch by 6-inch brass sleeves A 140-pound hammer was utilized <br /> to advance the sampler over an 18-inch interval ahead of the augers, the number of blows required <br /> to advance the sampler over each 6-inch increment was recorded on the boring logs All sampling <br /> equipment was washed in an Alconox solution and rinsed twice with water prior to each sampling <br /> run <br /> Both ends of the selected soil sleeve collected for laboratory analysis were covered with Teflon <br /> sheets, capped and sealed with tape The preserved samples were labeled with boring designation, <br /> sample depth,date and tune of sampling and the sample collector's initials The samples were stored <br /> In a chilled container and transported under chain-of-custody to McCarnpbell Analytical Inc (MAI) <br /> of Pacheco, California, a Department of Health Services (DHS)-certified laboratory <br /> I• <br /> 3 3 SOIL ANALYSES <br /> ISelected samples were analyzed for the following <br /> • Total petroleum hydrocarbons as gasoline (TPH-g) in accordance with EPA Method 8015 <br /> Modified, <br /> • Volatile aromatic compounds-benzene,toluene,ethylbenzene and total xylenes (BTEX) and <br /> 1 methyl tertiary butyl ether (MTBE) in accordance with EPA Method 8020 Modified, and <br /> i0 Fuel additives including MTBE, tertiary-butyl alcohol (TBA), di-isopropyl ether (DIPE), <br /> ethyl tertiary-butyl ether (ETBE), tertiary-amyl methyl ether (TAME), ethylene dibromide <br /> (EDB) and 1,2-dichloroethane (1,2-DCA)by EPA Method 8260M <br /> 34 SOIL,LOGGING <br /> During drilling,sample duplicates were monitored for the presence of organic vapor using an organic <br /> vapor meter equipped with aphoto-iornzation detector(PID Thermo Environmental 580A, 10 0 eV, <br /> calibrated to isobutylene)and were visually described on boring logs in accordance with the Unified <br /> Soil Classification System (USCS) Boring logs are included as Appendix A <br /> Advanced GeoEnvironmental,Inc <br />