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9 Quik Stop Market No 76 October 28, 2003 Stockton California Results of Additional Groundwater[nvestt ation d>bromoethane (EDB) by EPA Method 8260B Groundwater analytical data are summarized in Table 2 Analytical reports are contained in Appendix D i Sensitive Receptor Survey A sensitive receptor survey was performed for the area within a 2000-foot radius of the site The sensitive receptor survey included identification of surface water bodies, and a water well search in the survey area Mormon Slough flows west approximately 1500 feet south of the site and exits the survey area southwest of the site Water from Mormon Slough flows into the Stockton Deep Water Channel approximately 3 6 miles west of the site Authorization to review well records at the California Department of Water Resources (DWR) was obtained from SJCEHD Horizon reviewed DWR records for the survey area Information obtained from the DWR indicated 6 water wells located within approximately a 2,000-foot radius of the site Five wells were identified as domestic and one as municipal The distance from the site to the wells range from approximately 450 to 1900 feet The locations of the wells are shown on Figure 3 Information on the wells identified in the water well survey is summarized in Table 3 Horizon performed a visual inspection of the survey area to evaluate the current status of wells documented in the DWR records and to identify wells not documented in DWR records Wells indicated by Map TDs 1 and 3 through 7 were identified in the field The California Water Service #52 well indicated by map ID 4 was only identified in the field, no record of the well was found in the DWR records No well was identified at the map ID 2 location indicating that the abandoned (in 1967) Douglas well was not replaced 076AddGW investgtn 10-03 doc 5 Prosect No 7079 14 HORIZON ENVIRONMENTAL