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TABLE 5-3 (continued) <br /> SUMMARY GROUND WATER SAMPLE ANALYTICAL RESULTS <br /> • AROMATIC VOLATILE ORGANICS <br /> See Figure 2-2 for approximate location of monitoring wells. <br /> Benzene, toluene, ethylbenzene, xylenes, and dichlorobenzene isomers analyzed by EPA Method 602. <br /> The summed geometric mean concentration was calculated by summing the geometric means of each <br /> constituent, for all available quarterly sampling analytical results. When there was no detection above the <br /> method detection limit, the geometric mean of one half of the lowest detection limit for all of the quarterly <br /> analytical data for that constituent was used in the computation of the geometric mean concentration. <br /> NA Not analyzed. <br /> NI Well not installed. <br /> NS Not sampled due to well damage. <br /> < Symbol denotes concentration not detected above method detection limit as noted. <br /> MCL Maximum contaminant levels (MCLS) listed for benzene, ethylbenzene, and xylenes are primary MCLs of <br /> California Department of Health Services, drinking water standards. There is no state established MCL for <br /> toluene, the listed MCL is the primary MCL of the U. S. Environmental Protection Agency, drinking water <br /> standards. There is no state established MCL for 1,2-DCB or 1,3-DCB, the listed MCL is the California <br /> State Action Level for toxicity. <br /> () Duplicate sample result. <br /> When less than 100% of the quarterly sampling events had detections, the minimum concentration detected was taken <br /> to be '/z of the lowest detection limit. <br /> • <br /> /u/csing/tracy/ri/tableshb15-3 5-3_19 <br />