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1500 Newell Avenue,Suite 0 <br /> Walnut Creek,California 94596•USA <br /> l <br /> GEOSYNTEC CONSULTANTS Tel.(925)943-3034•Fax(925)943-2366 <br /> 8 June 2001 <br /> VIA FACSIMILE & U.S.MAIL NOV d 9 2001 <br /> Ms. Amy Terrell <br /> California Regional Water Quality Control Board <br /> Central Valley Region <br /> 3443 Routier Road, Suite A <br /> Sacramento, California 95827-3098 <br /> Subject: Work Plan for Field-Scale Pilot Test <br /> Western Farm Service, Inc. <br /> Vernalis, California <br /> Dear Ms. Terrell: <br /> This letter constitutes a work plan for the implementation and monitoring of a pilot- <br /> scale field test for enhanced in-situ anaerobic bioremediation of chlorinated <br /> hydrocarbons (i.e. pesticides) and nitrate detected in groundwater at the Western Farm <br /> Service, Inc. (WFS) Vernalis, California facility (Figure 1). This work is described in <br /> the following sections. <br /> TECHNOLOGY DESCRIPTION <br /> Tasks necessary for implementing the pilot-scale field test include installing one <br /> small-diameter monitoring well and injecting Hydrogen Release Compound (HRC) into <br /> the uppermost groundwater at the approximate locations shown on Figure 2. <br /> This work is proposed as a pilot-scale field test to evaluate whether this technology <br /> is an effective corrective action for groundwater under the physical and chemical <br /> conditions present at the WFS Vernalis site. Furthermore, the test is proposed to be <br /> performed in an area of the site with detectable concentrations of nitrate and chlorinated <br /> hydrocarbons in the uppermost groundwater. <br /> \\WCREEK-OI\DATA\PRJI\WFS\SHELL\VER\HRC plans\RWQCB Plan.doc <br /> Regional Offices: Laboratories: <br /> Atlanta,GA•Austin,TX•Boca Raton,FL•Chicago,IL Alpharetta,GA•Atlanta,GA <br /> Columbia,MD•Huntington Beach,CA•Walnut Creek,CA A Boca Raton,FL <br /> `, RECYCLED AND RECYCLABLE (9§ <br />