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• CAMBRIA 95 fbg samples at concentrations ranging from 5 8 to 7 4 ppb No BTEX, TBA, DIPE, ETBE, Ethanol,EDB, or 1,2-DCA were detected in any of the groundwater samples from this boring Groundwater data are summarized in Table 3 and are presented on Figure 3 The certified analytical reports for the water samples are presented in Appendix C SENSITIVE RECEPTOR SURVEY Cambria reviewed Department of Water Resources (DWR) records to identify water production wells within 2,000 feet of the site, and performed a door-to-door survey to determine the location of any water supply wells within 250 feet of the subject site Cambria reviewed United States Geologic Survey topographic maps for Stockton, California to identify surface water bodies within 2,000 feet of the site Two domestic wells, one municipal well, and one industrial well were identified through DWR records A domestic well used by the Fremont Mobile Estates is located approximately 600 feet east-southeast of the subject site The other domestic well identified is reportedly located • approximately 2,100 feet southwest of the subject site The current owner of the property does not use the well (they have a city water hook up) and did not know if the well still exists The municipal well is also located to the southwest, approximately 1,950 feet away The industrial well is owned by the Wood Canning Company and is located approximately 900 feet southeast of the site The well locations are shown on Figure 1 Well data is summarized on Table 4 No additional wells were located during the door-to-door survey The door-to-door survey data is summarized on Table 5 Of the 42 addresses visited during the door-to-door survey, 37 residents were available to directly answer questions Inforinational questionnaires were left at the remaining five locations, and to date, Cambria has not received any responses to the questionnaires No surface water bodies were located within 2,000 feet of the site CONCLUSIONS The goal of this investigation was to delineate the vertical and lateral extent of petroleum hydrocarbons previously detected in soil and groundwater in the vicinity of the northern dispenser island (the suspected source area) Boring SB-8 was drilled north of the northern dispenser island area to delineate the lateral extent of petroleum hydrocarbons detected in soil The absence of gasoline constituents in soil samples collected from 10 to 50 fbg suggest the 0797 5