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REVISED WORK PIAN <br /> ADDITIONAL SITE ASSESSMENT <br /> 7-ELEVEN STORE NO. 20680 <br /> 9120 THORNTON ROAD <br /> STOCKTON, CALIFORNIA <br /> JUNE 1989 <br /> IRMODUCTION <br /> The following is a proposed work plan for additional site <br /> assessment at the Southland Corporation, 7-Eleven Store #20680 <br /> located at 9110 Thornton Road, Stockton, California (Figure 1) . <br /> This work plan is presented in order to detail the tasks <br /> presented in Groundwater Technology, Inc. 's (GTI) cost proposal <br /> presented to the Southland Corporation (Southland) on November <br /> 23, 1988, and the letter from Southland dated January 17, 1989. <br /> In conjunction with obtaining the required lead agency approval <br /> and permits to conduct the work described, this work pian is to <br /> be submitted to the California Regional Water Quality Control <br /> Board (CRWQCB) , and to the San Joaquin County Local Health <br /> District. The tasks described in this work plan focus on the <br /> need to further define the horizontal and vertical extent of the <br /> contaminant plume. In addition, completion of the work described <br /> will allow for a determination of the vertical hydraulic <br /> conductivity variation on the site. <br /> This work plan addresses the installation of additional on- <br /> and off-site monitoring wells. The new installations will include <br /> two monitoring wells, and two "well clusters". Each monitoring <br /> well will be constructed of 2-inch-diameter PVC casing and well <br /> �`� cHlll'XIIN'1TF:N <br /> TkiN\nL�Ka.INC <br />