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KLEINFELDER <br /> File No. 20-3978-01.W 10 <br /> July 26, 1997 <br /> Section of This Recommended Recommended Remediation°Goal a <br /> Letter/Area Lead Agency <br /> 4.4/Existing and PHS/EHD This phase of work is unrelated to the pond <br /> Former Pond and closure Lwhich is within the jurisdiction o the <br /> Pond Bottom RW CB. We propose the use of TTLC and STLC <br /> Locations for metals per 22CCR§66261 and U.S. EPA <br /> Region IX Preliminary Remediation Goals (PRGs) <br /> for Industrial Property dated August 1, 1996 for all <br /> other contaminants, as follows: <br /> • arsenic(soil)=500 mg/kg(TTLC) and 5 mg/L <br /> (STLC) <br /> • barium(soil) = 10,000 mg/kg(TTLC) and 100 <br /> mg/L(STLC) <br /> • cadmium(soil) = 100 mg/kg(TTLC) and <br /> 1 mg/L(STLC) <br /> • total chromium(soil)=2,500 mg/kg(TTLC) <br /> and 5 mg/L(STLC) <br /> • copper(soil) =2,500 mg/kg(TTLC) and 25 <br /> mg/L(STLC) <br /> • lead(soil)= 1,000 mg/kg(TTLC) and 5 mg/L <br /> (STLC) <br /> • mercury(soil)=20 mg/kg(TTLC) and 0.2 <br /> mg/L(STLC) <br /> • molybdenum(soil)=3,500 mg/kg (TTLC) and <br /> 350 mg/L(STLC) <br /> • nickel(soil)=2,000 mg/kg(TTLC) and 20 <br /> mg/L(STLC) <br /> • vanadium(soil)=2,400 mg/kg (TTLC) and 24 <br /> mg/L (STLC) <br /> • zinc (soil)= 5,000 mg/kg(TTLC) and 250 <br /> mg/L(STLC) <br /> • 4-4'-DDE(soil)=5.6 mg.kg <br /> • Linuron(soil)= 1,400 mg/kg <br /> • total xylenes (soil) =320 mg/kg <br /> 20-3978-01.W10/2017L155 Page 39 of 50 Copyright 1997,Kleinfelder,Inc. <br />