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1117 Lone Palm Avenue, Suite B <br /> Modesto, CA 95351 <br /> hfp://www.atcassociates.com <br /> CVYATC2gSbI 209.579.2221 <br /> Fax 209.579.2225 <br /> A S S O C I A T E S 1 N C . <br /> April 23, 2005 [OWCOVEDD <br /> 54.17861.0001 MAY <br /> 0 <br /> E"ONMENT HEALTH <br /> PER"tT/SE13VICES <br /> Mr. Nuel Henderson <br /> San Joaquin County <br /> Environmental Health Department <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject: Third Quarter 2004 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 (SJEHD), ATC <br /> Associates Inc. has prepared this letter report summarizing the Third Quarter 2004 groundwater <br /> monitoring and site activities performed at the above referenced site (Figure 1). Sampling was <br /> performed to monitor the distribution of petroleum hydrocarbons in groundwater. Monitoring was <br /> performed to determine the groundwater flow direction and the hydraulic gradient in the <br /> uppermost aquifer. <br /> SITE LOCATION <br /> The project site is located at 7675 West Eleventh Street, between MacArthur Drive and Chrisman <br /> Road, in Tracy, California. The site location is shown on Figure 1. The vicinity of the site is <br /> 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 /> sAEnvironmenta1\17861\1reports\1 gmr2004.doc 1 <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />