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ENdVIROI�V' EI }TAL HEAT Tit �\/ <br /> PFR' ' <br /> 3Er Chevron <br /> RVICE <br /> 95 FEB —2 PH l: 23 <br /> 31 January 1995 <br /> Chevron Pipe Line Company. <br /> Western Business Una <br /> Mr.David Jenkins 5080 California Avenue,Suite 400 <br /> Bakersfield,CA 93309-1671 <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> California Environmental Protection Agency <br /> Sacramento, California 95827-3098 <br /> Revised Work Plan for Additional Site Characterization <br /> Alden Park <br /> Tracy,California <br /> Dear Mr. Jenkins: <br /> Please find attached the above referenced work plan, dated 31 January 1994, prepared by Geomatrix <br /> Consultants Inc. (Geomatrix) on behalf of Chevron Pipe Line Company (CPL). As discussed in the <br /> cover letter, the work plan is a revised version of the previously submitted Geomatrix work plan, dated <br /> 19 May 1994, and describes the additional characterization of soil and groundwater at the Alden Park <br /> site. <br /> The data obtained during this study will be utilized to evaluate the extent of select petroleum <br /> hydrocarbon constituents in the subsurface and to prepare a heath risk assessment(HRA)work plan. The <br /> work plan will be submitted to the California Environmental Protection Agency Department of Toxic <br /> Substances Control (DTSC) and the California Regional Water Quality Control Board - Central Valley <br /> Region(RWQCB)in conjunction with the results of the additional characterization. <br /> CPL is currently in the process of preparing a Risk Assessment Review Agreement with the DTSC. It is <br /> estimated that the agreement will be executed by 28 February 1995. <br /> Please review the work plan at your earliest convenience so that we can initiate contact with the property <br /> owners who will be impacted by the proposed scope of work. Contact Mr. Martin Bloes (805/632-1086) <br /> or me (805/632-1046)with any remarks or questions. <br /> r Sincerely, <br /> b.� D.rC"IbeurtsonEnnmental Specialist <br /> Enclosure (1) <br /> cc: Richard Becker- DTSC <br /> Greg Brorby- Geomatrix Consultants <br /> Jill Jefferson- Geomatrix Consultants <br /> Margaret Lagorio- San Joaquin Public Health Services <br />