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3 ATC&frFORNIA GEORGE OEUKMEJIAN,Governor <br /> CALIFORNIA REGIONAL WATER QUALITY CONTROL BOARD— <br /> CENTRAL VALLEY REGION <br /> 3443 ROUTIER ROAD °. <br /> SACRAMENTO,CA 95827-3098 <br /> 19 May 1987 M pY 2 0 IQ-87 <br />'. Mr. Carl Seward ENVIROMENTAL HEALTH <br /> Regional Environmental Coordinator PERMIT/SERVICES <br /> Arco Petroleum Product Co. <br /> 2254 Clipper Ct. <br /> Fairfield, CA94533 <br /> ARCO GAS STATION AT BENJAMIN HOLT AND PLYMOUTH DRIVES, STOCKTON--SAN JOAQUIN <br /> COUNTY <br /> In order .to determine the_next steps .in the inveestigation .of soil and ground <br /> water contamination at the Arco station at Benjamin Holt and Plymouth Drives we <br /> met with Ms. Laurie Cotulla' of the Local Health District; Larry Phillips and Pat <br /> Cullen of Brown and Caldwell, consulting engineers. They indicated they were to <br /> represent you and agree to suitable measures needed to investigate this problem. <br /> The attached memo ingludes a short summary of this meeting. At the end is a list <br /> of the items that must be completed _in order. to' address our concerns at the <br /> present time. <br /> The goal of the investigation is to define the full lateral and vertical extent <br /> of contamination due to the 1983 spill and any other activities at the Arco <br /> station. Specific items to. be submitted to us by 1 June 1987 include: <br /> 1. Results from an onsite soil survey, review and evaluation of all data from <br /> the site to the present time, ,this is to include data acquired since <br /> Emcon's report of March, 1986; sampling results from existing <br /> monitoring wells, and results of an on-site and off-site vapor survey. <br /> 2. A proposed workplan for future investigation. For. more detail please refer <br /> to the attached memo. <br /> i <br /> 3. Evaluation of ongoing _discharge;.of contaminated ground water to the City of - <br /> Stockton's sewer system. (; <br /> If you have any questions regarding this site, please call me at (916) 361-5681. ` <br /> > � ILI <br /> ROBERT L. NIBLACH <br /> Engineering Geologist <br /> RLN - <br /> Attachments <br /> j <br /> cc: ✓Ms. Laurie Cotulla, San Joaquin County Local Health District, Stockton, CA <br /> Mr. Pat Cullen, Brown and Caldwell Consulting Engineers, Sacramento, CA <br /> - - I <br />