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quality of on-site groundwater. The shallow and deep wells on site are <br /> actually drawing water from the A aquifer (see Table I) . No on-site ground- <br /> water monitoring wells draw water from the B aquifer. Groundwater samples <br /> were obtained in April and June 1986 and analyzed for VOCs, heavy metals, and <br /> cyanide. The April samples were not filtered before analyses; the June <br /> samples were filtered. Sampling and analyses of water from several additional <br /> monitoring wells installed at the site should help determine if the A aquifer <br /> is contaminated with heavy metals from the Bite. The results of those <br /> analyses are shown in Table 1. <br /> B. OFF-SITE CONTAMINATION <br /> In the spring of 1987, 10 domestic and industrial wells within about a 1-mile <br /> radius of the site were sampled by the California Regional Water Quality <br /> Control Board (RWQCB) and analyzed for VOCs, metals (3 wells only) , and <br /> standard well inorganic parameters (3 wells only) . CWS operates seven <br /> municipal wells within a 1-mile radius of the site and monitors them for VOCs <br /> on at least a quarterly basis (Personal Communication, Scott Walker, 1989a) . <br /> Monitoring data from July 1988 through December 1988 were reviewed for this <br /> preliminary health assessment. The results of the monitoring are shown in <br /> Table 2. The maximum VOC levels shown in Table 2 were detected in the water <br /> samples from the nearby CWS-77 municipal well. The maximum lead concentration <br /> detected was from a public park well (Oak Park) used for irrigation and <br /> fountain drinking water. <br /> 4 <br />