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07 June 2004 AGE-NC Project No 02-0926 p Page 5 of 11 Soil samples were collected ahead of the drill bit using a California modified split-spoon sampler loaded with three pre-cleaned 2-inch by 6-inch brass sleeves The samples were collected from the monitoring well pilot bonngs at five-foot intervals, beginning at 5 feet bsg, using a 140-pound hammer to advance the sampler The number of blows required to advance the sampler over each a` 6-inch increment of the 18-inch sampling interval was recorded ori the boring logs Sampling equipment was washed in an Alconox solution and double rinsed with water prior to each sampling -� run to minimize cross-contamination For each sample, both ends of the leading or other selected y 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 CTEL, a State of California DHS- certified analytical laboratory 3 2 2 Logging So11 was extruded from the remaining brass sleeves and screened for the presence of organic vapor using an organic vapor meter(OVM)equipped with a PID,the OVM readings were recorded on the boring log Soil was visually described by an AGE geologist on the boring log in accordance with s the Unified Soil Classification System (see Appendix A) 3 2 3 Well Completions Pilot bonngs MW-1 through MW-3 were completed as ground water monitoring wells using two-inch diameter schedule 40 PVC casing with 0 010-inch slotted screen installed from approximately 35 feet to 55 feet bsg in all three bonngs with blank casing extended to the surface The filter pack (No 3 Lonestar sand) was installed from approximately 33 feet to 55 feet bsg A nominal 2-foot bentonite chip 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 installed over the wells As built well diagrams are shown in Appendix A ; 3 2 4 Laboratory Analyses of Soil Samples After collection,the samples were properly labeled,placed in a chilled container and select samples were transported under chain-of-custody to CTEL,a California DHS-certified analytical laboratory, and analyzed for • TPH-g, TPH-d and TPH-mo in accordance with EPA Method 8015 Modified, • BTEX, MTBE, TBA, DIPE, ETBE and TAME in accordance with EPA Method 8260, 11 Total lead in accordance with EPA Method 6010 Advanced GeoEnvi ron mental,Inc l 1 '