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USA Gasoline Corporation has installed 10 monitor wells in the course of the investigation of this site Six of these wells are located within the USA property boundaries and four wells are located to the south in a downgradient direction (see Figure 3 ) After the existing wells were in place (excluding MW8) , a Problem Assessment Report was prepared December 5, 1989 This report was included in Appendix A of the Quarterly Monitoring Report of September 24 , 1991 It presented Soil Boring analysis , Ground water analysis, Ground water flow direction, Aquifer test data with an estimate of transmzssivity and hydraulic conductivity, and an evaluation of the zero line of contamination On February 8 , 1993 , MW8 was installed eight feet southeast of the tank field This location was in a hydraulic downgradient direction from the tank field (see Figure 3 ) A Limited Drilling Report was prepared on February 25 , 1993 to document the methods and procedures used to construct the well That report was included as Appendix C of the May 4 , 1993 Quarterly Monitoring Report The well was sampled for the first time on March 31 , 1993 Western Geo-Engineers was contracted by USA Gasoline Corporation to perform a one day Vapor Extraction Feasibility Test On March 14 , 1995 four monitor wells were tested, MW4 , S1, S2 and MW8 , the results from this limited test suggests that Vapor Extraction (V E ) is a viable mitigation technique for this site The . findings are presented in the ' Results of Pilot Test for Vapor Extraction' report dated April 17 , 1995 USA Gasoline Corporation is currently undergoing the preparation of a Remedial Action Plan for this site and will commence corrective action upon concurrence and notification from the regulatory agency (s) of their proposal GEOLOGY The deposits under the site are Recent to Pleistocene age alluvium and consist of lenticular silt, sand, gravel and clay representing a heterogeneous fluvial environment The Problem Assessment Report for this site (Appendix A of the Quarterly Monitoring Report for September 24 , 1991) details the local and regional geology and hydrogeology The soil samples and drill cuttings from MW8 indicated similar lithologies to those presented in the Problem Assessment Report HYDROLOGY Ground water elevations at the site ranged between 5 and 6 feet below sea level from January 20 , 1989 to April 18 , 1989 From April 18 , 1989 through September 13 , 1991 , ground water 2 USA 65 Sept 195 Qtr Rpt