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tom/ L,f U GROUND ZERO ANALYSIS, INC. 1714 Mam Street Escalon, Cahforma 95320-1927 Telephone (209)838-9888 Facsmnle (209) 838-9883 I April 21, 2005 Mr Ron Pestana John Pestana QTIP Trust P O Box 672 Manteca, CA 95336-9998 Subject Groundwater Monitoring and Sampling Report Former Reeve's Exxon, 2360 East Street, Tracy, California Dear Mr Pestana This letter report summarizes the results of groundwater samplmg activities at the subject site (Figure 1) during the month of April 2005 Site activities consisted of measuring depth to water, purging all site wells, and collecting groundwater samples from all site wells The groundwater samples were analyzed for total petroleum hydrocarbons as gasoline (TPHg), benzene, toluene, ethylbenzene, xylenes (BTEX), and methyl-tent-butyl ether (MTBE) GROUNDWATER MONITORING AND SAMPLING Groundwater monitoring and sampling was conducted on April 8, 2005 The depth to groundwater in site wells ranged from 6 38 to 7 17 feet below the tops of the well casings Groundwater flow beneath the site was toward the northeast at a gradient of approximately 0 0061 ft/ft A groundwater gradient map for April 8, 2005 is presented on Figure 2 Groundwater monitoring data are summarized in Table 1 At least three well casing volumes of water were purged from wells MW1, MW2, and MW3 prior to sampling All purged groundwater was contained in properly labeled 55-gallon drums Field purge logs are included in Attachment A Groundwater samples were submitted to Argon Laboratories (FLAP #2359) The samples were analyzed. for TPHg using EPA 8015B, and BTEX and MTBE by EPA method 8021B The protective well box for well MW3 has sunk to slightly below the ground surface and is in need of repair Groundwater monitoring data and purge logs are included in Attachment A z