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Table 2 I Groundwater Sampling Anayltical Results for the Tracy Tire fire Site, San Joaquin County, California _ Sample Sample Method Analyte I Resul Qualifier MDL PQ MCL Units I.D. Date ^eneral Minerals and Metals Monitoring Parameters in Groundwater MW-2 05/20/03 160.1 Total Dissolved Solids 623 5.4 10.0 500* mg/L 05/20/03 376.2 Total Sulfide <0.050 0.0093 0.050 mg/L 05/20/03 180.1 Turbidity 1650 Q 17.0 100 0.005* NTU '1 05/20/03 6020 Vanadium <0.010 0.0031 0.010 mg/L 'II 05/20/03 6020 Zinc 0.0040 B 0.0010 0.0050 5 mg/L MW-3 05/20/03 6020 Aluminum <0.050 0.0021 0.050 mg/L 05/20/03 6020 Antimony 0.00043 B 0.000036 0.0020 mg/L 05/20/03 6020 Arsenic <0.0020 0.00050 0.0020 mg/L 05/20/03 6020 Barium 0.032 0.00096 0.0010 mg/L 05/20/03 6020 Beryllium <0.0010 0.000078 0.0010 mg/1, 05/20/03 6020 Cadmium <0.0010 0.000074 0.0010 mg/L 3 05/20/03 6020 Calcium 155 0.015 0.050 mg/L iI 05/20/03 300.OA Chloride 173 Q 1.3 20.0 250* mg/L 05/20/03 6020 Chromium 0.0024 0.00092 0.0020 0.05 mg/L 05/20/03 6020 Cobalt 0.0022 0.000057 0.0010 mg/L 05/20/03 6020 Copper 0.0033 J 0.000056 0.0020 1.3/1.0* mg/L !, 05/20/03 9012A Cyanide, Total 0.0060 B J 0.0020 0.010 0.2 mg/L 05/20/03 7196A Hexavalent Chromium <0.010 0.0021 0.010 mg/L 05/20/03 6020 Iron 0.033 B 0.017 0.050 0.3* mg/L 05/20/03 6020 Lead 0.00016 B 0.000066 0.0010 0.015 mg/L 05/20/03 6020 Magnesium 40.2 0.00079 0.050 mg/L 05/20/03 6020 Manganese 0.0063 0.000087 0.0010 0.05* mg/L 05/20/03 7470A Mercury <0.0002 0.000064 0.0002 0.002 mg/L 05/20/03 6020 Nickel 0.00015 B 0.000098 0.0020 0.1 mg/L 05/20/03 300.OA Nitrate as N 0.74 Q 0.060 0.10 45 mg/L 05/20/03 150.1 pH 7.2 0.10 0.10 pH _) 05/20/03 6020 Potassium 4.7 0.0040 0.050 mg/L 05/20/03 6020 Selenium <0.0020 0.0017 0.0020 0.05 mg/L 05/20/03 6020 Silver <0.0010 0.000030 0.0010 0.1* mg/L 05/20/03 6020 Sodium 120 J RLA 0.055 0.25 mg/L 05/20/03 120.1 Specific Conductance 1540 2.0 2.0 0.9* umbos/cm Page 3 of 49 7/17/03