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Table 2 <br /> Concentrations of Metals in Soil <br /> Race Track Area <br /> Stockton 99 Speedway <br /> 4105 N.Wilson Way <br /> Stockton,CA <br /> Sample Identification [Sample Date OEHHA <br /> Race Track Area (Soil) Residential <br /> PRGs For Soil TTLC STLC <br /> Metal HA 1-3 HAI-5' HA2-3' HA3-3' HA4-3' HA4-5' HAS 3' HA6-3' '2005' (10/01/02) <br /> Analytes/Parameters [7/7/05] [7/7/05] [7/7/05] [7/7/05] [7/7/05] [7/7/05] [7/7/05] [7/7/05] <br /> Cadmium 0.545 1 ND(<O.100) ND(<O.100) 0.283 0.397 ND(<0.100) ND(<0.100) ND(<0.100) 1.7(2) 37(11 100 1 <br /> Chromium 139 161 144 129 106 153 119 129 *** 210(2l 2500 5 <br /> Lead 23.3 18.2 15 14.9 13.9 26.5 22.1 16.7 150(,) 400(11150 13 1000 5 <br /> Nickel 129 123 116 119 99.6 138 131 118 1,600 1 1,60014 2000 20 <br /> Zinc 161 116 138 164 115 155 1 129 144 1 23,000(j) 23,0001 5000 250 <br /> Units mg/kg mg/kg mg/kg mg/kg mg/I <br /> Notes: <br /> ND =none detected at or above the detection limits shown for the individual analytes <br /> mg/kg =milligrams per kilogram(parts per million) <br /> mg/I =milligrams per liter(parts per million) <br /> PRGs =preliminary remediation goals <br /> OEI IIIA =office of environmental health hazard assessment(human exposure based screening numbers) <br /> tl =non carcinogenic hazard <br /> t-) =cancer risk 1 E-06 <br /> (3) _"CAL-Modified PRG" <br /> (6) =nickel as soluble salts • <br /> =no chromium and compound screening number. Chromium III[100,000 mg/kg(1)],Chromium VI,1.7 mg/kg(2)] <br /> TTLC =total threshold limit concentration <br /> STLC =solueble threshold limit concentration <br /> Page T-2 <br /> 58671.E01/ST05R1127 <br /> Copyright 2005,Kleinfelder Inc. September 15,2005 <br /> h� KLEINFELDER <br />