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S NrFN <br /> f•: ENVIRONMENTALTECHNOLOGIESCORPORATION <br /> November 10, 1997 <br /> Mr. Ronald Rowe <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> 304 E. Weber Avenue, 3rd Floor <br /> Stockton, CA 95202 <br /> Subject: Third Quarter 1997 Groundwater Monitoring Report for the Fayette <br /> Manufacturing Site, 7675 West Eleventh Street, Tracy, California, SITE CODE: <br /> 2233 <br /> Dear Mr. Rowe: <br /> As required by the San Joaquin County Public Health Services, Environmental Health Division <br /> (PHS/EHD) and at the request of Dr. A.R. Glover, Smith Technology Corporation (acquired by <br /> ATC Associates ) has prepared this letter report summarizing the Third Quarter 1997 <br /> =' groundwater monitoring and site activities performed at the above referenced site (Figure 1). <br /> Sampling was performed to monitor the distribution of petroleum hydrocarbons in groundwater. <br /> Monitoring was performed to determine the groundwater flow direction and the hydraulic <br /> gradient in the uppermost aquifer. <br /> BACKGROUND <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 /> Previous Work <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 present in the southern <br /> UST excavation (Figure 2). Soil samples were collected from 2 feet below the bottom of the <br /> USTs, and petroleum constituents and lead were detected in the soil samples. <br /> J w:1951221Reports\3QMR1997.doc 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering Consulting Remediation Construction <br />