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a . 20 January 2003 AGE-NC Project No 95-0109 Page 2 of 8 were supplied by Cascade Drilling, Inc Auger returns generated by drilling were properly containerized in 5 5-gallon Department of Transportation(DOT)-approved drums and stored on-site 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 Soil samples were collected at between 70 feet and 80 feet bsg from pilot boring MW-15 using a 140-pound hammer to advance the sampler Soil samples collected from MW-15 were used to confirm lithologic data from the December 2001 Cone Penetrometer Testing(CPT)investigation None of the soil samples collected were submitted for laboratory analysis 212 Logging Soil was extruded from the sleeves in the sampler and were screened for the presence of organic vapor using an organic vapor meter(OVM)equipped with a photo-ionization detector(PID Thermo Environmental 580A, 10 0 eV,calibrated to isobutylene), and the OVM 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 A) 2 13 Well Completion Pilot bonngs MW-15 through MW-19 were completed as ground water monitoring wells using two-inch diameter PVC casing with 0 020-inch slotted screen The screen intervals were installed from approximately 50 feet to 70 feet bsg in boring MW-16,75 feet to 80 feet bsg in borings MW-15 and MW-19, 110 feet to 120 feet bsg in boring MW-17 and 112 feet to 117 feet bsg in boring MW-18 The filter packs (No 3 Lonestar sand) were installed from the bottom of each boring to approximately two feet above each screened interval, and a nominal 3-foot bentonite plug was installed above the filter packs and hydrated The wells were then grouted to near the surface with portland cement Water-tight,traffic-rated well boxes were subsequently installed over the wells As- built well diagrams are depicted on the boring logs in Appendix A 2 14 Well Development On 27 December 2002,wells MW-15 through MW-19 were developed utilizing a Watera Hydrolifl Pump Ground water was purged from each well until the water was visually sediment free,between 25 and 35 gallons of water were removed from MW-15, MW-16 and MW-19 and approximately 75 gallons from wells MW-17 and MW-18 Purged ground water was containerized in properly Advanced GcoEnvlronmentel,Inc