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-- SECTION 1 <br /> Introduction <br /> This site characterization work plan has been prepared by CH2M HILL for Del Monte Foods <br /> +- (Del Monte),and presents the scope of work for performing a field investigation at the Disco <br /> site in Stockton,California. <br /> L This work plan is being submitted to the Public Health Services/Environmental Health <br /> Division(PHS/EHD) of the San Joaquin County. Del Monte is complying with the PHS/EHD <br /> requirements for site characterization and remediation activities,by the Health and Safety <br /> .. (H&S) Code Section 25299.37(b)(c)(6), to be eligible for reimbursement of corrective action <br /> costs from the State Water Resources Control Board Cleanup Fund (USTCF). <br /> The field investigation documented in this work plan has been developed to provide <br /> '- additional site characterization of petroleum constltuent4 in soil and groundwater beneath and <br /> downgradient of the Disco property. Additional characterization is warranted due to rising <br /> water levels and a change in groundwater flow direction. Currently there are no downgradient <br /> ►� wells. <br /> 1 .1 Objectives <br /> The objectives of the field work presented in this work plan are to: <br /> s— • Define the vertical extent of petroleum constituents in groundwater beneath the former <br /> tank and pump area; <br /> • Define the downgradient lateral extent of petroleum constituents in groundwater. <br /> Information obtained during this field investigation will be used to determine the appropriate <br /> next step,with respect to additional site activities. <br /> 1 .2 Work Plan Organization <br /> This work plan has been prepared following guidelines outlined in Recommendations for <br /> Preliminary Investigation and Evaluation of Underground Tank Sites,Appendix A,prepared by the <br /> Central Valley Regional Water Quality Control Board (CVRWQCB). The remainder of this <br /> work plan is divided into the following sections: <br /> • Section 2,Site Setting and Background <br /> ` • Section 3,Sampling Methodologies and Analytical Plan <br /> • Section 4,Quality Assurance Project Plan <br /> • Section 5,Reporting and Scheduling <br /> • Section 6,References <br /> r.. <br /> SFNCABERNEf/GROuPs/EBG/DELMONTE/PLANT_33/WORKPLm_CPT.DOC 2 <br /> V <br />