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PACIFIC.' ' <br /> ENVIRONMENTAL <br /> � �?� <IL F�. <br /> ALTh <br /> GROUR INC. } !' ,�,ER ICE . <br /> - 96 OCT 13 AM 9` 36 <br /> October 17, 1996 <br /> Project 920-078.1A <br /> Ms. Mary Meays <br /> San Joaquin County Public Health Services <br /> Environmental Health Division j <br /> 304 E. Weber Avenue, Third Floor' ~ <br /> Stockton;CA 95201-0388 <br /> Re`. Addendum,to Work Plan for Well Installation <br /> Chevron Service Station 9-0557 <br /> 139 South Center Street - <br /> Stockton, California <br /> Site Coder 1039 - <br /> Dear Ms. Meays: <br /> This letter, prepared by Pacific Environmental Group, Inc. (PACIFIC) on behalf of <br /> Chevron Products Company (Chevron);presents a response to your letter, dated <br /> October 4, 1996, which refers to PACIFIC's Work Plan for Well Installation, dated <br /> September 26, 1996.• The San Joaquin County Public Health Services - Environmental . <br /> Health Division(SCEHD) comments are in bold italics. . <br /> The historical record indicates Chevron has submitted minimum scopes of work and <br /> that over four years have been spent in tentative efforts to,define the extent of <br /> groundwater contamination. _ <br /> Chevron and PACIFIC wish to address the hydrocarbon impact at the site in an <br /> appropriate and timely manner. However;we also wish to insure that proper, cost f <br /> effective actions are taken at the site once the risk associated with the hydrocarbon <br /> plume has been,evaluated. The subject Work Plan proposes to define the extent of <br /> hydrocarbons in groundwater in the downgradient direction, and to initiate evaluation of <br /> risk at the site by performing a well search, sensitivexeceptor survey, and potential <br /> offsite source search once the downgradient well has been installed and sampled. It is <br /> our opinion that a phased approach at the site is appropriate and cost efficient. . <br /> 1 1. 15 Sunrise Gold-Circle, Suite M, Rancho Cordova,,Californ ia 95742, (916)858-2350 FAX(916) 858-2355 <br />