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f^I <br /> f j <br /> 14 PROTEC`C QUARTERLY UPDATE <br /> REPORT <br /> 7-ELEVEN STORE <br /> I.� 9110 THORNTON ROAD <br /> j STOCKTON, CALIFORNIA <br /> MAY. 18, 1989 <br /> �R <br /> I� INTRODUCTION <br /> {+ This report presents a quarterly update of the services <br /> conducted by Groundwater Technology, Inc. at 7-Eleven Store <br /> Fa No. 20680, located at 9110 Thornton Road in Stockton, Calitc.rnia <br /> r (Figure 1) . As shown on the Site Plan (Figure 2) , the store is <br /> situated on the northern corner of Thornton Road and Waudman <br /> Avenue in a mixed commercial and residential area. This report <br /> summarizes work performed by Groundwater Technology between <br /> r � January 1, 1990 and March 31, 1990. <br /> BACKGROUND <br /> { <br /> In April 1986, Groundwater Technology was retained by <br /> w Southland Corporation to conduct a subsurface investigation of a <br /> suspected unleaded-gasoline release at the above-mentioned <br /> location. The unleaded fuel-delivery system failure was detected <br /> during a precision tank-system test conducted March 28, 1986. <br /> The unleaded underground-storage tank and distribution system was <br /> w then shut down April 2, 1986. On May 5, 1986, excavations at the <br /> site to expose fuel and vapor lines indicated that the source of <br /> the loss was a fuel line located beneath the concrete slab <br /> adjacent to the pump islands. <br /> 14 GROUNDWATER <br /> " TECHNOL0 CV.INC. <br />