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EA Engineering,Science,and Technology fEF1 ?-4 '92 T1 li., FA Western Regional Operations <br /> 41 Lafayette Circle <br /> Lafayene CA 94549 <br /> Telephone 510-283-7077 <br /> fax 510-283-3894 <br /> 18 February 1992 <br /> Clint Rogers <br /> Environmental Engineer <br /> Chevron U.S.A. Inc <br /> 2410 Camino Ramon <br /> San Ramon, California 94583 <br /> Dear Mr Rogers <br /> This site update has been prepared by EA Engmeerung, Science, and Technology regarding the <br /> latest groundwater sampling at former Chevron SS 9-1918, 45 East Harding Way, Stockton, <br /> California. Figure 1 is a site map showing the locations of monitoring wells at the site The <br /> contents of this document are being furnished at the direction of Chevron U S A Inc <br /> . Currently, only MW9 has sufficient water to collect a representative environmental sample. The <br /> sample was collected on 17 January 1992 and analyzed for benzene, toluene, ethylbenzene, and <br /> xylenes (BTEX) and for Total Petroleum Hydrocarbons as gasoline (TPH-g) Purge water is <br /> being stored on the site in a 55-gallon drum Table 1 summarizes the analytical results of the <br /> latest groundwater sampling The laboratory report, chain-of-custody record, and groundwater <br /> purge and sample form are attached Also included in this report are summary tables of all <br /> groundwater sampling (Table 2) and well gauging (Table 3) to date. <br /> Please contact us if you have any questions <br /> Sincerely, <br /> Joe Muehleck <br /> Environmental Chemist <br /> LJ� <br /> Terry R Winsor, R G <br /> Program Director <br /> JM Jm/ds WP51/91919(1)/QT"AN92/ROGERS 4 <br /> Enclosures <br />