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1117 Lone Palm Avenue, Suite B <br /> CV\YATC <br /> Modesto, CA 95351 <br /> http://www.atcassociates.com <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> A S S O C I A T E S I N C . <br /> July 6, 2005 <br /> 54.17861.0001 <br /> Mr. Nuel Henderson RDA <br /> FCE U�San Joaquin County LC F[0 <br /> Environmental Health Department JUL 1 8 2005 <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 ENVIRONMENT HEALTH <br /> KRMI TaRVICES <br /> Subject: Second Quarter 2005 Groundwater Monitoring Report for the Fayette <br /> Manufacturing Site, 7675 West Eleventh Street, Tracy, California <br /> Site Code: 2233 <br /> Dear Mr. Henderson: <br /> As required by the San Joaquin County Environmental Health Department (SJCEHD), ATC <br /> Associates Inc. (ATC) has prepared this letter report summarizing the Second Quarter 2005 <br /> groundwater monitoring and site activities performed at the above referenced site (Figure 1). <br /> L, Sampling was performed to monitor the distribution of petroleum hydrocarbons in groundwater. <br /> Monitoring was performed to evaluate the groundwater flow direction and the hydraulic gradient: <br /> in the uppermost aquifer. <br /> SITE LOCATION <br /> The project site is located at 7675 West Eleventh Street, between MacArthur Drive and <br /> Chrisman Road, in Tracy, California. The site location is shown on Figure 1. The vicinity of the <br /> site is primarily a commercial and industrial area. The property is owned by Dr. A.R. Glover. <br /> The site is located on generally level terrain which slopes gently toward the Tom Paine Slough, a <br /> northwest trending extension of the delta located approximately 2.5 miles north of the site. <br /> BACKGROUND <br /> On October 15, 1986, two 500-gallon gasoline underground storage tanks (USTs) were removed <br /> from the site. During removal of the USTs, petroleum product was noted in the southern UST <br /> excavation (Figure 2). Soil samples were collected from two feet below the bottom of the USTs, <br /> and petroleum constituents and lead were detected in the soil samples. <br /> On July 18, 1995, Smith Technology supervised the installation of three groundwater monitoring <br /> wells, MW-1, MW-2, and MW-3 (Figure 2). During installation of the monitoring wells, soil <br /> samples were collected from the borings. On July 21, 1995, Smith Technology developed and <br /> sAEnvironmental\17861\reports\2gmr2005,doc 1 <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />