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contamination at the site and its relationship to the locations <br /> of known domestic water Supply wells, Groundwater Technology <br /> initiated a groundwater sampling and analysis program. Water <br /> namples have been collected from the 9 monitoring wells and 14 <br /> of the domestic wells near the site. The samples were collected <br /> and preserved in accordance with Groundwater Technology's <br /> Standard Operating Procedures 9, 10 and 11. Analysis of the <br /> dissolved hydrocarbon components Benzene, Toluene, Xylene and <br /> total volatile hydrocarbons was conducted by EPA Method 602. In <br /> addition a general mineral analysis was conducted on a water <br /> sample .conforming to Title 22, to provide background groundwater <br /> quality data. Appendix III contains the laboratory .results for <br /> mT all water sample analyses conducted through August 1986. <br /> Initial water sampling of monitoring wells 2 and 3 was <br /> conducted May 15, 1986. A summary of subsequent analyses of <br /> samples from the monitoring wells through August 11, 1986 is <br /> f <br /> �✓ presented in Table 2. The areal distribution of the total <br /> dissolved hydrocarbon concentrations for the July 17 and the <br /> August 11, 1986 samplings is presented in Figures 9 and 10. <br /> i� <br /> The first domestic well sample was collected from 9135 <br /> Connie on June 13, 1986. Because this first and a second sample, <br /> analyzed by Trace Analysis Laboratories, indicated the presence <br /> of detestable concentrations of dissolved hydrocarbons a more <br /> comprehensive domestic well sampling program was initiated. This <br /> program included sampling a greater number of wells , lh total, <br /> on a weekly schedule. Figure 3 shows the location of the domestic <br /> wells included in this sampling program.The first two sample <br /> rounds, analyzed by Trace analysis Laboratories, continued to <br /> detect low levels of dissolved hydrocarbons. Four subsequent <br /> f _ samplings analyzed by the following laboratories Brown and <br /> Caldwell, California Analytical and the State Department of <br /> Health Services have not detected dissolved hydrocarbon concentr- <br /> ations above method detection limits. The analyses conducted by <br /> {' Trace Analyses is believed to- be in error when compared to the <br /> 19 <br />