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November 18, 1996 r <br /> WALLACE •KUHL <br /> &ASSOCIATES INC. Mr. Harlin Knoll <br /> San Joaquin County Public Health Services RECEIVED <br /> 304 E. Weber Avenue, Third Floor NOV 19 1996 <br /> Stockton, California 95201-0388ENVIRONMENTAL HEALTH <br /> PERMIT/SERVICES <br /> WORKPLAN.FOR SITE CLOSURE <br /> GRANITE CONSTRUCTION <br /> 10500 South Harlan Road <br /> French Camp, California 95231 <br /> WKA No. 2088.08 <br /> _ <br /> IT <br /> — <br />� I <br /> Dear Mr. Knoll, <br /> On behalf of Granite Construction, we are submitting this workplan for site closure <br /> for the above referenced property located at 10500 South Harlan Road in French <br /> Camp, California(Plate 1). The purpose of our work will be to address certain <br /> criteria for a"Low Risk Groundwater Case" as outlined in the Revised Draft <br /> Recommendation for Low Risk Site Classification in the Central Valley Region <br /> dated July:19, 1996 prepared by the Central Valley Regional.Water Quality Control <br /> Board (CVRWQCB). <br /> ` Geotechnical Engineering <br /> The scope of our work will include the following <br /> Engineering Geology <br /> i <br /> Environmental Consulting . prepare mathematical modeling with documentation indicating <br /> 4� <br /> that the remaining petroleum hydrocarbons in subsurface soil in <br /> _ -- <br /> -Remediation Services <br /> 'F the vicinity of the former underground storage tanks will not <br /> Construction Inspection reverse or threaten to reverse the mass reduction rate of <br /> a <br /> I groundwater contamination beneath the site. Our mathematical <br /> Materials Testing <br /> i modeling will use a one-dimensional finite difference vadose <br /> P � <br /> zone leaching model known as VLEACH, Version 2.2, <br /> developed by CHZM Hill for the United States Environmental <br /> 3050 Industrial Blvd. Protection Agency <br /> West Sacramento - - - - <br /> CA 95691 • prepare VLEACH modeling for the diesel contaminated soil <br /> - <br /> � Fax 916.372.2565 stockpile <br /> 916.372.1434 <br /> Reryded paper <br />