ARCHIVED REPORTS_XR0006794 - Laserfiche WebLink

Home Browse Search

. CAMBRIA MW-10, and MW-11, located south of the subject site, are primarily caused by the presence of chlorinated compounds in the groundwater Benzene was detected in wells MW-2 through MW4, MW-6, and MW-7 at concentrations ranging from 0 52 to 3,800 ppb MTBE and DIPE were detected in well MW-4 at concentrations of 5 9 and 36 ppb, respectively TBA was detected in well MW-10 at 120 ppb No other fuel oxygenates were detected in wells sampled this quarter Groundwater chemical analytical data for CPT borings SB-5 and SB-6 are summarized in Table 3 and TPHg, benzene, and MTBE results are presented on Figure 3 The laboratory analytical report for SB-5 and SB-6 is presented in Appendix D Groundwater chemical analytical data for the monitoring wells are summarized in Blaine's Well Concentrations table (included in Appendix D) and Table 4 and benzene and MTBE results are presented on Figure 3 The laboratory analytical report for the monitoring wells is also presented in Appendix D SENSITIVE RECEPTOR SURVEY Cambria reviewed California Department of Water Resources (DWR) records to identify water- producing wells within a 2,000-foot radius of the subject site and identified surface water bodies within a 2,000-foot radius of the site by reviewing maps Table 5 summarizes the well information, and Figure 1 shows the area encompassed by the survey, the results of the well survey, and the surface water bodies Water Well Survey The DWR records identified four wells within the study area The wells were installed between 1951 and 1978 Three of the wells were installed for domestic use and one was installed for municipal use The closest well to the subject site is a domestic well located approximately 450 feet northeast of the site A second domestic well is located 850 feet northeast of the site The municipal well is located approximately 2,000 feet northwest of the site, and the remaining domestic well is located approximately 2,000 feet southwest of the site Available well construction information is summarized on Table 5 and the approximate well locations are plotted on Figure 1 Surface Water Bodies Cambria reviewed the United States Geological Survey 7 5 minute quadiangle indps for Stockton, California anti California State Automobile Association maps to evaluate the presence of surface water bodies within the survey area No surface water bodies were identified within the study area 0854 7