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Geological Technics Inc. <br /> 1101 7"Sheet <br /> Modesto,Califomia 95354 <br /> (209)522-41191 Fax(209)522-4227 <br /> ' REPORT <br /> Groundwater Monitoring <br /> 4t` Quarter 2005 <br /> George's Service <br /> 1600 Durham Ferry Road <br /> Tracy, California <br /> Project No 425 2 <br /> January 31, 2006 <br /> EXECUTIVE SUMMARY <br /> The site, located at the intersection of Highway 33 and Durham Ferry Road (Figure 1), has <br /> been owned and operated by George and Mei Teranishi since the 1940's as an automobile <br /> repair facility and market Gasoline was sold at the site until 1990, when the tanks were <br /> removed This report summarizes the 4`i' Quarter 2005 groundwater monitoring and <br /> sampling event that was completed on October 30, 2005 <br /> ' The four zones at the site showed the following general characteristics <br /> 1 Zone A wells—Bearing and slope were N07°E and 0 0012 ft/ft, respectively <br /> 2 Zone B wells -Bearing and slope were N30°W and 0 0037 ft/ft, respectively <br /> ' 3 Zones C wells - Bearing and slope were N63°W and 0 0037 ft/ft, respectively The <br /> bearing is suspect because the three wells monitored in this zone lie nearly in a <br /> straight line <br /> ' 4 Zones D well - Beanng and slope cannot be calculated because there is only one well <br /> in this zone <br /> 5 The vertical component of groundwater flow is predominantly in the upward <br /> ' direction <br /> The analytical results from the October 30, 2005 monitoring event show that TPH-G, BTEX, <br /> ' Fuel Oxygenates and/or Lead Scavenger constituents are present in seven (7) monitoring <br /> wells (MW-1, MW-2, MW-4, MW-5, MW-7, MW-8 and MW-106) The remaining <br /> 1 <br />