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7020-Koll Center.Parkway, Suite 134, Pleasanton, CA 94566-3107 (925] 426-5d95 FAX (925) 426-5391 <br /> • <br /> Compliance <br /> Closure, Inc. <br /> VELJ . <br /> MAR 13 2000 <br /> ENVIRONIVIEI'�ITAL HEALTH <br /> February 29, 2000 PERMIT/SERVICES <br /> San Joaquin County <br /> Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, California 95202 <br /> Attention: Ms. Lori Duncan <br /> RE: Confirmation Sampling <br /> Quik Stop Market No. 121 <br /> 1196 West Louise Avenue, Manteca, California <br /> (CCI Project No. 12118-3) <br /> Dear Ms. Duncan: <br /> At the request of Quik Stop Markets, Inc. (Quik Stop), Compliance & Closure, Inc. (CCI) hereby <br /> submits the results of the confirmation sampling of the three groundwater monitoring wells at <br /> Quik Stop Market No. 121, located at 1196 Louise Avenue in the City of Manteca, San Joaquin <br /> County, California, (Figure 1). <br /> As you are aware, groundwater samples collected from the three site wells on January 20, '2000, <br /> were reported by the laboratory to contain elevated concentrations of methyl tertiary butyl ether <br /> (MTBE). In January, the three wells were reported to have MTBE concentrations of 59 <br /> micrograms per liter(ug/l) in well MW-2, 21,000 ug/I in well MW-1 and 58,000 ug/l in well <br /> MW-3. These samples were.analyzed using EPA Test Method 8020. In order to confirm the <br /> MTBE concentrations, CCI resampled the three wells on February 17, 2000, It should be noted <br /> that during the sampling of the three wells, monitoring well MW-3 had a moderate product odor. <br /> No odor was noted in the other two wells. The three water samples were analyzed using EPA <br /> Test Method 8260. The laboratory reported all three wells to have detectable concentrations of <br /> MTBE. Monitoring well MW-3 was reported to contain the highest MTBE level, at a <br /> concentration of 49,000 ug/l. Monitoring wells MW-2 and MW-1 were reported to have <br /> detectable concentrations of MTBE, at 3 ug/l and 11,000 ug/l, respectively. Copies of the <br /> groundwater sample and purge data, as well as the laboratory reports, are attached. <br /> Recydabie and made from recycled paper.0 <br />