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' 06 August 2004 AGE-NC Project No 95-0128 ' Page 5 of 11 ' 2 3 3 Well Completions Pilot boring EW2 was completed using 6-Inch diameter PVC casing,with 0 03-inch slotted screen ' Installed from 35 to 55 feet bsg,VW2 through VW4 were completed as vapor extraction wells using 2-inch diameter PVC casing, with 0 02-Inch slotted screen Installed from 20 to 35 feet bsg, then a filter pack(No 3 Lonestar sand)was Installed from total depth to 2-feet above the slotted screen,and ' 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,and water-tight,traffic-rated well boxes were Installed over the wells As-built well diagrams are depicted on the boring logs in Appendix C 1 2 3 4 Laboratory Analysis of Soil Samples ' Selected soil samples were analyzed for • TPH-g and TPH-d in accordance with EPA Method 8015 Modified, and • BTEX and MTBE In accordance with EPA Method 8021 1• 1 2 3 5 Extraction Well Development On 29 March 2004, ground water extraction well EW-2 was developed utilizing a Waterra Inertia 1 pump with a hose bailer Ground water was purged from the extraction well until ground water was visually sediment free, approximately 100 gallons of water were removed from the well Purged water was discharged into the active groundwater treatment system for treatment and disposal Field 1 sheets and data are Included in Appendix B 1 2 3 6 Well Elevation Head Survey On 30 March 2004,a California state-licensed surveying engineer from Baumbach and Piazza(BP) surveyed the elevation of monitoring wells MW-17, MW-18 and EW-2, the elevation at the top of the well casing was surveyed to the nearest 0 01-foot relative to Stockton benchmark #15, at an elevation of 10 98 feet above mean sea level (MSL) The results of the monitoring well survey are ' contained in Table 2 The surveying report by BP Is presented In Appendix D IAdvanced GeoEnvironmental Inc