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i <br /> Addendum to Work Plan May 24, 1991 <br /> ARCO Station No. 760, Lodi.CAiforr_ia AGS 38048-6W <br /> o Submit vapor samples 0 a laboratory approved by ARCO for analyses of <br /> TPHg and BT. .,', <br /> a Prepare a repos : _mmarizing our methods, interpretations, and <br /> conclusions regarding the feasibility of using vapor extraction to remove <br /> hydrocarbons form soil underlying the site. <br /> The additirnal work will b- performed in accordance with the Tri-Regional Board Staff <br /> Recommendatio.fs for Preliminary Evaluation and Investigation of Underground Tank <br /> Sites (California Regional Water Quality Contro: Board, Centra: Valley Region, 1989); <br /> Appendix A to that.document (August 1990); and the Leaking Underground Fuel Tank <br /> Manual (Califorr.sa Leaking Underground Fuel Tank Task Force, 198v). The Site <br /> Mitigation Acknowledgement/ Request For Services Form is included in attachments to <br /> this work plan. <br /> We recommend that a copy of this work pian and the drilling permit be forwarded to <br /> ! Ms.Diane Hinson of tithe San Joaquin County Public Health Services, Environmental <br /> Health Division, 445 North San Joaquin. Stockton, California 95202. Please call if you <br /> have any questions regarding this work plan. <br /> Sincerely, <br /> p1E D0 Applied GeoSysterns, Inc. <br /> 04 <br /> # Eloise K Frick <br /> No.4313 Project GeologistOF C <br /> t <br /> John B. Bobbitt <br /> R.G. 4313 <br /> Attachments: Site Vicinity Map, Plate P'1 <br /> Generalizc.d Site Plan, Plate P-2' <br /> Schematic, Well Design, Plate P-3 <br /> Field Methods <br /> Emergency Route to Hospital, Plate P-IS <br /> r mended Sections of Site Safety Plan, February 15.1990 <br /> i <br /> A.DPAed 0eoSYSAW"S <br />