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4 - 1 <br /> r July 28, 1988 AGS Job No. 38012-2 <br /> Former UNOCAL ,service Station, Stockton, California <br /> of contaminants has had an adverse impact on local ground-water <br /> resources. This report describes the work conducted for this <br /> investigation, summarizes the data collected, and presents our <br /> interpretation of these results and recommendations for <br /> additional work. <br /> BACKGROUND <br /> Two former underground gasoline storage tan's were located to the <br /> northeast of the station building. Information provided by <br /> personnel of UNOCAL Corporation indicates that the two 10,000- <br /> gallon tanks were used to store super unleaded and regular <br /> unleaded gasoline. A 550-gallon waste-oil tank was located east <br /> of the station building. The approximate locations of the tanks <br /> are shown on the Generalized Site Plan (Plate P--2) . <br /> North Cal Construction of Stockton, California, was responsible <br /> for removing the tanks, acquiring permits, and notifying the <br /> appropriate authorities. Mr. Andre O'Neil of the Stockton Fire <br /> Department and Ms. Debra Karew and Ms. Kasa Israel of the San <br /> Joaquin Local Health District (SJLTiD) were present during removal <br /> of the tanks and soil and ground-water sampling. <br /> 2 <br /> APV1i4rd GeaSyste1nS <br />