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'0 1117 Lone Palm Avenue, Suite B <br /> V Modesto, CA 95351 <br /> G' g' http://wwwATC .atcassociates.com <br /> 209.579.2221 <br /> Fax 209.579.2225 <br /> A 8 3 0 C I A 7 E S I N C . <br /> n1D jEC)E � <br /> Aril 23 2005 D <br /> 54.17861.0001 MAI 0 5 2005 <br /> """'QNWNT HEALTH <br /> PERMTISERVICES <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: Fourth 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 Fourth 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 evaluate the groundwater flow direction and the hydraulic gradient in the uppermost <br /> 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 /> s:\Environmental\17861\reports\1 gmr2004.doc 1 <br /> ENVIRONMENTAL, GEOTECHNICAL AND MATERIALS PROFESSIONALS <br />