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STH <br /> N41.1ENVIRON IENTALTECNNCLOGIESCORPORATION <br /> January 31, 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: Fourth Quarter 1996 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 (PHSIEHD) and at the request of <br /> Dr. A.R. Glover, Smith Technology Corporation has prepared this letter report summarizing the <br /> Fourth Quarter 1996 Groundwater Monitoring and site activities performed at the above <br /> referenced site (Figure 1). Sampling was performed to monitor the distribution of petroleum <br /> hydrocarbons in groundwater and to monitor bioparameters in groundwater to determine if <br /> bioremediation is occurring in the dissolved petroleum hydrocarbon plume. Monitoring was <br /> performed to determine the groundwater flow direction and the hydraulic gradient in the <br /> uppermost aquifer. Additional activities conducted at the site this quarter included the disposal of <br /> the waste soil and groundwater stored at the site at licensed facilities, and the replacement of the <br /> damaged wellboxes for monitoring wells MW 1 and MW3 on-site. <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 /> w:1951221RepmU\4QMR1996.doc 1 <br /> 1260 Graphics Drive Modesto,CA 95351-1502 (209)579-2221 Fax(209)579-2225 <br /> Engineering • Consulting • Remediation - Construction <br />