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SH KLEINFELDER <br /> File No. 20-3978-O1.W10 <br /> July 26, 1997 <br /> Section of This Recommended Recommended Remediation°Goal ' <br /> Letter/Area Lead Agency <br /> 4.11 /Former AST PHS/EHD Currently, the extent of contamination has not been <br /> Locations precisely defined. Would currently propose U.S. <br /> EPA Region IX Preliminary Remediation Goals <br /> (PRGs) for Industrial Property dated August 1, <br /> 1996 of: <br /> • arsenic(soil)=220 mg/kg <br /> • barium (soil)=5,300 mg/kg <br /> • total chromium(soil)=210 mg/kg <br /> • cobalt(soil)=4,600 mg/kg <br /> • copper(soil)=2,800 mg/kg <br /> • vanadium(soil)=540 mg/kg <br /> • zinc(soil)=23,000 mg/kg <br /> • total xylenes (soil)=320 mg/kg <br /> • for the diesel, use"LLNL Study"'. <br /> 20-3978-01.W10/2017L155 Page 43 of 50 Copyright 1997,Kleinfelder,Inc. <br />