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GEOLOGICAL _S_ ER_V_ ICES . INC_ . <br /> _,-- — - En"Vi"riinme til, eological, and Natural Resource Consultants <br /> �- Colorado • California • Virginia • Hawaii • Saipan <br /> November 18, 1999 <br /> Ms. Margaret Lagorio, Lead Senior RENS <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> RE: Submission of Case Closure Request information, <br /> Tracy Cold Storage, Tracy, California. <br /> Site Code 505329 <br /> Dear Ms. Lagorio, <br /> At your request, American Geological Services is submitting the following information related to <br /> the "No further action" request dated September 7, 1999, submitted on behalf of Western <br /> Refrigerating & Cold Storage Company. The additional information was requested during a recent <br /> telephone conversation and was to include a sensitive receptor survey, a revised site map, and a <br /> table of soil sample analytical data. <br /> Sensitive Receptor Survey <br /> American Geological Services conducted a survey of potential sensitive receptors located within <br /> 2,000 feet radially from the site. City of Tracy, and California State Department of Water <br /> Resources files were reviewed to determine the number and location of ground water wells around <br /> the site. Field reconnaissance was performed by AGS personnel to attempt to locate ground water <br /> wells and other sensitive receptor sites within the area of concern. <br /> The City of Tracy supplies potable water to most residences and businesses in the area. No <br /> municipal water supply wells were identified within the boundaries of the area of concern. The <br /> nearest identified municipal well is located at Lincoln Park, approximately 4,000 feet from the <br /> subject site. <br /> Department of Water Resources provided records for 10 additional private water supply wells <br /> located within the general vicinity of the site. Nine of these wells fall outside the boundaries of the <br /> 2,000 feet radius, with the one well identified within the boundaries located on the Tracy Cold <br /> Storage site. No Department of Water Resources records were provided for the second water <br /> supply well located at the subject site. <br /> An additional 20 well driller's reports were provided for soil gas monitoring, air sparging, and <br /> piezometer wells located at the Southern Pacific Depot site. Based on the numbering system <br /> Telephone (209) 532-8021 14847 Mono Way, Sonora, CA 96370 FAX(209)532-3809 <br />