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w a 4. 'u1S'", ";." ;,,'"",,,.:1bS.. :t w,s-2... '�' '"'°,nC„K .,sem, "i.' •�. 5.,W'? `-' i,? a ..µr. ''` *, <br /> s� <br /> fi <br /> R <br /> Addendum to Work Flan May 24, 1991 <br /> ARCO Station No. 760, Lodi, California ArS 38048-6W <br /> o Submit vapor samples to a laboratory approved by ARCO for analyses of <br /> T?Hg and BTEX. <br /> o Prepare a report summarizing our methods, interpretations, and <br /> conclusions regarding the feasibility of using vapor extraction to remove <br /> hydrocarbons form soil underlying the site. <br /> The additional work will be performed in accordance with the Tri-Regional Board Staff <br /> Recommendations for Preliminary Evaluation and Investigation of Underground Tank <br /> Sites (California Regional Water Quality Control Board, Central Valley Region, 1989); <br /> Appendix A to that document (August 1990); and the Leaking Underground Fuel Tank <br /> Manual (California Leaking Underground Fuel Tank Task Force, 1989). 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 plan and the drilling permit be forwarded to <br /> Ms. Di:,nt-. Hinson of the San Joaquin County Public Health Services, Environmental <br /> Health Division, 445 North San 3oaquin. Stockton, California 95202. Please call if you <br /> have any questions regarding this work plan. <br /> Sincerely, . <br /> t D a - Applied GeoSystems, Inc. <br /> o�, <br /> Q�,�sd► dei .4 <br /> .4 <br /> * * Eloise K. Frick <br /> No. 4313 Project Geologist <br /> a� a, cCLa <br /> John B. Bobbitt <br /> R.G. 4313 <br /> Attachments; Site Vicinity Map, Plate P-1 <br /> Generalized Site Plan. Plate P-2 <br /> Schematic Well Design, Plate P-3 <br /> Field Methods <br /> Emergency Route :n Hospital, Plate P-IS <br /> Amended Sections of Site Safety Plan, February 15, 1990 <br /> 3 <br /> 4p011e0' GeOSYSAMS <br />