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1 <br /> 04 November 2002 <br /> . AGE-NC Project No 00-0764 <br /> ' Page 2 of 5 <br /> a California-modified split spoon sampler loaded with three clean,2 X 6-inch brass sleeves A 140- <br /> pound hammer was used to advance the sampler 18 inches,the number of blows required to advance <br /> the sampler over each 6-inch Increment was recorded on the boring logs Sampling equipment was <br /> washed in an Alconox solution and rinsed with water prior to each sampling run to minimize cross- <br /> contamination <br /> For each sample,both ends of the leading or other selected sleeve were covered with Teflon sheets, <br /> ' capped and sealed with tape The samples were labeled,stored In a chilled container and transported <br /> under chain-of-custody to Cal Tech Environmental Laboratories (CalTech) located in Paramount, <br /> t California, a California Department of Health Services (DHS)-certified analytical laboratory <br /> Selected samples were analyzed for <br /> • Total petroleum hydrocarbons quantified as gasoline and diesel(TPH-g and TPH-d)by EPA <br /> ' Method 8015 Modified, <br /> • Volatile organic compounds(VOCs),in particular benzene,toluene,ethylbenzene and total <br /> xylenes(BTEX),and the oxygenated fuel additives methyl-tert-butyl ether(MTBE),tertiary <br /> butyl alcohol (TBA), di-isopropyl ether (DIPE), ethyl tertiary butyl ether (ETBE), tertiary <br /> amyl methyl ether(TAME),ethylene dibromide (EDB) and 1,2-dichloroethane (1,2-DCA) <br /> tin accordance with EPA methods 8260 Modified <br /> • The five LUFT metals chromium, copper, nickel, lead and zinc in accordance with EPA <br /> ' methods 6010 <br /> ' 22 SOIL LOGGING <br /> After sample preservation, soil was extruded from the remaining sleeves and screened for the <br /> ' presence of organic vapor using an organic vapor analyzer(OVA)equipped with a photo-Ionization <br /> detector(PID Thermo Environmental 58013, 10 0 eV,calibrated to isobutylene) The soil was also <br /> ' described in accordance with the Unified Soil Classification System Soil boring logs exhibiting soil <br /> profiles are depicted in Appendix A <br /> 2 3 MONITORING WELL INSTALLATION AND DEVELOPMENT <br /> Pilot borings MW-1 through MW-5 were completed as ground water monitoring wells using <br /> two-Inch diameter PVC casing with 0 020-Inch slotted screen installed from approximately 15 to 35 <br /> feet bsg in borings MW-1 through MW-4 and from approximately 69 to 74 feet bsg in boring MW-5 <br /> ' and with blank casing extended to the surface A filter pack(No 3 Lonestar sand)was Installed from <br /> approximately 13 to 35 feet bsg in wells MW-1 through MW-4 and from approximately 68 to 75 feet <br /> bsg in well MW-5 A nominal 2- to 3-foot bentonite chip plug was then installed above the filter <br /> ' Advanced GeoEnvironmental,Inc <br /> I <br /> 1 <br />