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Table 1 <br /> Concentrations of Metals in Soil <br /> Dry Well and Debris Areas <br /> Stockton 99 Speedway <br /> 4105 N.Wilson Way <br /> Stockton, CA <br /> Sample Identification ISample Date <br /> OEHHA Residential <br /> Dry Well Soil Sampling Test Pit Soil Sampling Debris Area (Soil) PRGs For Soil TTLC STLC <br /> Metal January (10/01/02) <br /> P1-32' P2-29' P3-12.5' P3-25' P4-29' P5-29' TPI-Comp TP2-Comp TP6,8-Comp TP7-Comp TP12-Comp TP2-15 2005 <br /> [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] [7/5/05] <br /> Arsenic ND(<0.5) ND(<0.5) ND(<0.5) 5.91 ND(<0.5) 13.8 ** ** ** ** ** ** 0.07 Z 0.39 2 0.062 3 500 5 <br /> Barium 375 450 405 269 296 283 ** ** ** ** ** ** 5200 5,400 t 10,000 100 <br /> Cadmium ND(<O.1) 0.294 ND(<O.1) ND(<O.1) 0.27 ND(<O.1) 2.08 0.27 1.31 0.477 2.66 7.55 1.7(2) 37 t 100 1 <br /> Chromium 85.2 106 96.8 91.6 115 84.9 79.3 48.5 80.4 113 90.4 225 *** 210 Z 2,500 5 <br /> Lead 12.8 11.6 18.8 6.33 13.2 1 17.2 556 273 300 328 821 1610 150(,) 400(1)150 1,3 11000 5 <br /> ND ND ND ND ND N I g t 23(j) 20 <br /> 0.2 <br /> <0.002 <0.002 <0.002 ** ** ** ** ** ** <br /> Mercury <0.002 <0.002 <0.002 20 <br /> Nickel ** ** ** ** ** ** 82.7 46.0 79.9 104 80.6 68.1 1,600 t 1,600(l.4) 2,000 <br /> Selenium 0.52 ND(<0.5) ND(<0.5) ND(<0.5) ND(<0.5) ND(<0.5) ** ** ** ** ** ** 380(,) 390 100 1 <br /> Silver ND(<0.5) ND(<0.5) ND(<0.5) ND(<0.5) ND(<0.5) ND(<0.5) ** ** ** ** ** ** 380 t 390� 500 5 <br /> � <br /> Zinc ** ** ** *" ** ** 614 283 449 403 498 1210 23,0000) 23,000 t 5,000 250 <br /> Units mg/kg Img/kg mg/kg mg/kg mg/1 <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 /> OEHHA =office of environmental health hazard assessment(human exposure based screening numbers) <br /> (t) =non carcinogenic hazard <br /> (2) =cancer risk 1 E-06 <br /> (3) _"CAL-Modified PRG" <br /> (4) =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-1 <br /> 58671.E01/ST05R1127 <br /> September 15,2005 <br /> Copyright 2005,Kleinfelder,Inc. <br /> k" K L E I N F E L D E R <br />