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ENVIRONMENTALTECHNOLOGIESCORPORATION <br /> June 11, 1997 <br /> Mr. Ronald Rowe <br /> San Joaquin County Public Health Services <br /> Environmental Health Division <br /> P.O. Box 388 <br /> Stockton, CA 95201-0388 <br /> Subject: First Quarter 1997 Groundwater Monitoring Report for the Fayette Manufacturing <br /> Site, 7675 West Eleventh Street, Tracy, California, SITE CODE: 2233 <br /> Dear Mr. Rowe: <br /> As required by the San Joaquin County Public Health Services (PHS/EHD) and at the request of <br /> Dr. A.R. Glover, Smith Technology Corporation has prepared this letter report summarizing the <br /> First Quarter 1997 Groundwater Monitoring and site activities performed at the above referenced <br /> site (Figure 1). Sampling was performed to monitor the distribution of petroleum hydrocarbons in <br /> groundwater and to monitor bioparameters in groundwater to determine if bioremediation is <br /> >r occurring in the dissolved petroleum hydrocarbon plume. Monitoring was performed to <br /> determine the groundwater flow direction and the hydraulic 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 /> On July 18, 1995, Smith Environmental supervised the installation of three groundwater <br /> monitoring wells, MW-1, MW-2, and MW-3 (Figure 2). During installation of the monitoring <br /> wells, soil samples were collected from the borings. On July 21, 1995, Smith Environmental <br /> w:1951221Reports\1QMR1997.doc 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering Consulting • Remediation Construction <br />