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Elm <br /> Table 1 Comparison of Groundwater Constituent Levels with Water Quality objectives <br /> AT <br /> ' Constituent _ <br /> Groundwater,M y' CA EPA MCL or Rection O'ESL <br /> - W Concentration(pq/L unless for Fresh Surface Water <br /> Indicated)', flug/L unless indicated) <br /> Antimony <508 <br /> 6 <br /> Arsenic 23 50 <br /> Banum 620 <br /> 1,000 <br /> Beryllium <5 0 4d <br /> Cadmium <10 5 <br /> Chromium(Total) <1 Ob <br /> 50 <br /> Chromium(iN) ---C 180(ESL) <br /> Chromium(vi) <1 Ob 11 (ESL) <br /> Cobalt <20 3(ESL) <br /> Copper <20 1,000(secondary MCL) <br /> Lead <5 0 15(action level at tap) <br /> Mercury 031 <br /> 2 <br /> Molybdenum <20 35(ESL) <br /> Nickel <20 <br /> 100 <br /> Selenium <5 0 <br /> 50 <br /> Silver <10 100(secondary MCL) <br /> Thallium <10 2d <br /> Vanadium <br /> <20 15'(ESL) <br /> Zinc 55 5000(secondary MCL) <br /> Chloride 32 mg/L 250(secondary MGL) <br /> Fluoride 0 13 mg/L µ <br /> 2 mg/L <br /> Nitrate as NO3 <2 0 mg/L <br /> 45 mg/L <br /> Sulfate 22 mg/L 250 mg/L(secondary MCL) <br /> Total Alkalinity 340 mg/L NA8 <br /> Bicarbonate as <br /> CaCO3 340 mg/L NA <br /> Carbonate as CaCO3 <5 0 mg/L NA <br /> Hydroxide as CaCO3 <5 0 mg/L NA <br /> pH 7 62 pH units NA <br /> Laboratory data sheets contain complete analysis results (Attachment B) <br /> (a) Indicates that parameter level was-below-the indicated detection-limited <br /> C IOucuments and <br /> SethngslcgohnsonlDesktoplUnocal\GeochemEval_D 7 November 2004 <br /> oc cloc <br />