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Applied Geotechnology Inc. <br /> Table 10 <br /> Metals in Groundwater and Soil <br /> By EPA Methods 601017000 Series <br /> USG Interiors <br /> Stockton, California <br /> June 1990 <br /> (1) I <br /> WATER <br /> Federal Detection <br /> MCL Limit MW-3 PW-1 PW-2 PW-3 PW-4 <br /> Metat (mg/l): (mg/0 (mg/1) (mg") (mg/1) (mg/1) (mg/1) <br /> Arsenic 0.05 0.005 0.019 0.014 0.019 0.050 0.015 <br /> Cadmium 0.01 0.0003 0.005 NO NO NO NO <br /> Chromium 0.05 0.02 NO NO NO NO NO <br /> Copper 1.0 (2) 0.02 0.04 0.03 NO NO NO <br /> Lead 0.05 0.005 NO NO NO 0.008 NO j <br /> Zinc 5.0 (2) 0.02 NO NO NO NO NO <br /> i (3) <br /> SOIL <br /> Detection <br /> Limit. S-1 S-2 S-3 S-4 <br /> (mg/kg. (mg/kg) (mg/kg). (mg/kg) (mg/kg) <br /> Metal dry..wt.) (dry wL) (dry wt.) (dry wt.) (dry wt) <br /> I' Arsenic 0.5 8.6 4.6 6.0 1.7 <br /> Cadmium 1 2 NO 2 2 <br /> Chromium 2 110 76 78 110 <br /> Copper 2 72 70 100 150 <br /> Lead 10 39 55 88 100 <br /> t,. Zinc 1 380 170 300 550 <br /> f <br /> Notes: <br /> MCL - Maximum Contaminant Level. <br /> NO - Not detected. <br /> (1)Dissolved metal concentrations. <br /> (2) Secondary Maximum Contaminant Level. <br /> (3)Total metal concentrations. <br /> S-1 - Property drainage trench near PW-1. <br /> S-2 - Property drainage trench near PW-3. <br /> S-3 - North end of drainage ditc't along Tillie Lewis Drive. <br /> S-4 - South end of drainage ditch along Tillie Lewis Drive. <br /> Arsenic,cadmium, and lead analyzed using EPA Methods <br /> 7060, 7131, and 7421 respectively. <br /> Chromium,copper, and zinc analyzed using EPA Method 6010. <br /> f <br />