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• 20 May 2004 AGE-NC Protect No 98-0521 Page 2 of 9 run to minimize cross-contamination Auger returns generated by dnlling were containerized in properly labeled Department of Transportation(DOT)-approved 55-gallon drums and stored on-site For each sample,both ends of the leading or other selected sleeve were covered with Teflon sheets, capped and sealed with tape The samples were properly labeled, stored on ice and transported under chain-of-custody to Cal Tech Environmental Laboratories(CTEL),a State of California Department of Health Services (DHS)-certified analytical laboratory 212 Logging Soil was extruded from the remaining brass sleeves of each soil sample collected and was screened for the presence of organic vapor using an organic vapor meter (OVM) equipped with a photo- ionization detector (PID Thermo Environmental 580B, 10 0 eV, calibrated to isobutylene) The organic vapor readings were recorded on a boring log The soil was then visually described on the boring log in accordance with the Unified Soil Classification System (see Appendix B) • 2 13 Well Completions Pilot boring MW-5 was completed as a ground water monitoring well using two-inch diameter PVC casing with 0 010-inch slotted screen installed from approximately 50 feet to 55 feet bsg in boring MW-5 with blank casing extended to the surface The filter pack(No 2112 sand)was installed from the bottom of the boring to approximately two feet above the top of the screened interval A nominal 3-foot bentonite plug was then installed above the filter pack and hydrated The wells were then grouted to near the surface with portland cement Water-tight, traffic-rated well boxes were then installed over the wells An as-built well diagram is depicted on the boring log in Appendix B 2 14 Laboratory Analyses of Soil Sample Soil samples collected from pilot boring MW-25 were labeled, stored on ice and transported under chain-of-custody to CTEL, a DHS-certified analytical laboratory Soil samples MW5-35,MW5-45 and MW5-55 were analyzed for • Total petroleum hydrocarbons quantified as gasoline (TPH-g) in accordance with EPA Method 8015M, • Benzene,toluene,ethyl-benzene,and total xylenes(BTEX)in accordance with EPA Method 8260B, and . The fuel additives di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), MTBE, Advanced GeoEnvnronmental,Inc