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P. The following table details the laboratory analytical results of the detected analytes for the groundwater samples collected from the three monitoring wells and the domestic well on site and referenced to the water quality goals set forth by the California EPA, RWQCB/CVR, A Compilation of Water Quality Goals, August 2003. Select Groundwater Results Sample Location MW-1 MW-2 MW-3 Domestic Well WQG (mg/L) Analyte Concentration (mg/L) Antimony ND<.001 0.001 0.001 ND<.001 0.006 PMCL Arsenic 0.01 0.019 0.01 0.01 0.05 PMCL Barium 0.531 0.492 0.512 0.474 1.0 PMCL Beryllium ND<.0002 ND<.0002 ND<.0002 ND<.0002 0.004 PMCL Cadmium ND<.0002 0.0002 ND<.0002 ND<.0002 0.005 PMCL Chromium 0.002 ND<.001 ND<.001 ND<.001 0.05 PMCL Cobalt 0.008 0.0179 0.0004 0.0056 0.05A Lead ND<.0002 ND<.0002 ND<.0002 ND<.0002 0.015 PMCL Mercury 0.00001 0.00001 0.00002 0.00001 0.002 PMCL 13 Molybdenum 0.0002 0.002 0.002 0.003 0.04/0.01 ND Nickel 0.001 0.036 ND<.001 0.008 0.1 PMCL Selenium 0.002 0.005 ND<.002 0.005 0.05 PMCL Silver ND<.001 ND<.001 ND<.001 ND<.001 0.10 PMCL Vanadium 0.032 0.028 0.029 0.034 0.050 c Zinc 0.19 0.26 0.15 0.2 5 SMCL Ammonia -N ND<0.2 56 0.9 ND<0.2 1.5/30 D Nitrate as NO3 86 583 48.4 209 45 PMCL Nitrate + Nitrite 19.3 132 10.9 47 NA TKN ND<0.5 60 1.3 ND<0.5 NA Nitrogen, Total 19.3 190 12.2 47 10 PMCL Phosphate 1.6 16.7 1.9 ND<0.5 NA Sulfate 70 194 31 132 250 SMCL TDS 660 1120 400 730 500 SMCL Pesticides ND all ND all NI) all ND all Organophosphates ND all ND all ND all ND all Carbamates ND all ND all ND all ND all * DBCP ND ND ND ND 0.0002 PMCL EDB ND 0.00004 ND ND 0.00005 PMCL 1,2,-Dichloropropane ND<.001 ND<.001 ND<.001 0.049 0.005 PMCL 1,2,3-Trichloropropane ND<.001 ND<.001 ND<.001 .004 0.042 D ND = Analyte not detected at or above the laboratory reporting limit. PMCL = Primary Maximum Contaminant Level; SMCL = Secondary Maximum Contaminant Level A = Agricultural Water Quality Limit B = Inorganic mercury PMCL C = California State Action Level for Drinking Water (Department of Health Services) D = Taste and Odor Threshold/Drinking Water Health Advisories or Suggested No Adverse Response Levels for toxicity other than cancer risk. * = Please refer to the California EPA, RWQCB/CVR, A Compilation of Water Quality Goals, August 2003, for a listing of individual pesticides, organophosphates, and Carbamates. NA = MCI not applicable to this analyte Bolded values denote concentrations at or above the MCL. 27125.E0I / STO4R181 Page 17 of 23 © 2004 Kleinfelder, Inc. February 13, 2004 KLEINFELDER 2825 East Myrtle Street, Stockton, CA 95205-4794 (209) 948-1345 (209) 948-0621 fax