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r EXECUTIVE SUMMARY BP STATION NO. 11192 1403 COUNTRY CLUB BOULEVARD STOCKTON,CALIFORNIA Site Location The site Is located at 1403 Country Club Boulevard in Stockton, California. It is situated on the northwest comer of the intersection of Country Club Boulevard and Pershing Avenue. The area surrounding the site is mainly residential in character. The elevation of R.9 site properly Is approximately six feet above mean sea level, and groundwater exists approximately thirty feet below the ground surface. Groundwater flows towards the northeast. Site History BP Station No. 11192 was built in 1976 and operated by Mobil Oil Company until May 1989 when the station was purchased by BP Oil. Ur?ited site assessment activities were conducted prior to the sale to determine onsite sor.and groundwater quality. Results of the assessment revealed the presence of gasoline In the soils southeast of the former pump islands and along 4 the eastern property boundary. s A series of seven groundwater monitoring wells have been installed onsite to facilitate soil ani; groundwater sampling. Laboratory analysis of these samples has revealed the presence of gasoline in the soli and the groundwater. The station closed for renovation in January 1991. In February the tanks and dispenser Islands were removed. To date the gasoline source has been removed and the extent of gasoline migration in soil has been defined. IT Corporation Is currently conducting limited offsite groundwater sampling activities to aid In defining the extent of gasoline migration In groundwater. Proposed Activities In the near future, IT will be conducting a test of the soil vapor collection system to determine ------.-- -- --.----whe;her-it-will be effective in removing hydrocarbons-from the soil and eventually the ---- ------- --------------- --- r+u�nm-marlusm�no6a.p� 1