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i `I 1 ' 27 February 2004 AGE-NC Project No 95-0144 ' Page 3 of 7 ' 2 13 Well Completions ; 1 Pilot boring MW-25 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-25 with blank casing extended to the surface The filter pack(No 2112 sand)was installed from the bottom of each 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 A 1 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 Cal Tech Environmental Laboratories (CTEL), a California Department of ' Health Services (DHS)-certified analytical laboratory One soil sample was analyzed for . Total petroleum hydrocarbons quantified as gasoline and diesel (TPH-g and TPH-d) in ' accordance with EPA Method 8015M, • Benzene, toluene, ethylbenzene and total xylene (BTEX) in accordance with EPA Method _ 8260B, and • The fuel additives di-isopropyl ether (DIPE), ethyl tertiary-butyl ether (ETBE), MTBE, tertiary-amyl methyl ether (TAME), tertiary butanol (TBA), ethanol, methanol, 1,2- ' dibromoethane(EDB) and 1,2-dichloroethane(1,2-DCA) in accordance with EPA Method 8260B 1 , 2 1 5 Monitoring Well Development On 29 July 2003,monitoring well MW-25 was developed utilizing a Waterra inertial pump equipped with 518" tubing and a foot-check valve Approximately ten casing-water volumes of water (60 ' gallons)were purged from well MW-25 Purged water was stored in 55-gallon DOT-approved drums on-site ' Advanced Geo Environmental,Inc