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INITIAL RELEASE DDJC Tracy <br /> TABLE 5.Contaminant Concentrations in Off-Site Agricultural Wells' <br /> Concentration(ppb) Number of <br /> Detections/ Number of Detections <br /> Minimum Maximum Number of Greater than the Comparison Value • <br /> Contaminant Sam les Comparison Valueb <br /> TCE 3.5 12 5/11 5 3 CREG <br /> 5 CA&EPA MCL <br /> PCE 1.5 4.3 5/11 5 0.7 CREG <br /> 5 CA& EPA MCL <br /> Carbon tetrachloride ND ND 0/11 0 0.3 CREG <br /> 5 CA&EPA MCL <br /> Sources: Woodward-Clyde Consultants, 1992b. <br /> ' Results from 1987 and 1991 agricultural well monitoring. <br /> 'The concentration was compared to the CREG or lowest comparison value. <br /> Key_ ND=not detected;CREG=Cancer Risk Evaluation Guide for I x 10'excess cancer risk;MCL=Maximum Contaminant Level. <br /> • <br /> 36 <br />