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1 <br /> 1 <br /> PROJECT QUARTERLY UPDATE REPORT <br />' REVISION 1 <br /> 7-ELEVEN STORE <br />' 9110 THORNTON ROAD <br /> STOCKTON, CALIFORNIA <br /> December 30, 1991 <br />' INTRODUCTION <br /> 1 This report presents a quarterly update of activities conducted by Groundwater Technology, Inc. at 7- <br /> Eleven Store No. 20680, located at 9110 Thornton Road In Stockton, California (Figure 1). As shown on <br />' the Site Plan (Figure 2), the store is situated on the northern comer of Thornton Road and Waudman <br /> Avenue In a mixed commercial and residential area. This report summarizes work performed by <br /> Groundwater Technology between July 1, 1991, and September 30, 1991. <br /> i <br /> Detailed descriptions of the background and subsurface conditions for the site have been outlined in <br /> previous reports, and presented most recently in the July 30, 1991 Protect Quarterly Update Reports 7- <br />' Eleven Store, 310 Thornton Road St ckton California. <br /> SCOPE OF WORK <br /> Services performed by Groundwater Technology during this reporting period consisted primarily of <br />' regularly scheduled monitoring and sampling of the groundwater monitoring and domestic water supply <br /> wells. Specifically, the following services were conducted during this reporting period: <br /> I • Monitored on-site and off-site observation wells for depth-to-water and depth-to-product <br /> on July 29, August 26 and September 26, 1991. <br /> 1 <br /> • Sampled groundwater from two monitoring wells and two monitoring-well clusters on <br />' August 26, 1991. <br /> FT GROUNDWATER <br />' TECHNOLOGY, INC. <br />