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v <br /> ASSOCIATES4%TC <br /> I N C . <br /> ADDITIONAL SITE EVALUATION <br /> AND <br /> REQUEST FOR NO FURTHER ACTION <br /> FOR FORMER FAYETTE <br /> �. MANUFACTURINGFACILITY <br /> 7675 WEST ELEVENTH STREET <br /> TRACY,CALIFORNIA <br /> V <br /> 1.0 INTRODUCTION <br /> This report reviews the results of previous soil and groundwater investigation activities conducted <br /> by ATC Associates (formerly Smith Technology Corporation) and attempts to demonstrate that <br /> intrinsic bioremediation renders the site a low risk to health, safety, and the environment. This <br /> report was prepared on behalf of Dr. A.R. Glover, the property owner, in response to San Joaquin <br /> County Public Health Services,Environmental Health Division(PHS/EHD) correspondence dated <br /> October 19, 1999, <br /> 1.1 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 currently occupied by Fayette <br /> Manufacturing,which manufactures wood trusses for the building construction industry. <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 /> 1.2 Site Background and Summary of Previous Work <br /> The following paragraphs describe chronologically the site's background and corrective actions <br /> that have been performed to date. <br /> y 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 observed in the southern <br /> portion of the UST excavation (Figure 2). Soil samples were collected from 2 feet below the <br /> y bottom of the USTs, and petroleum constituents and lead were detected in the soil samples. <br /> On July 18, 1995, Smith Technology supervised the installation of three groundwater monitoring <br /> wells, MW-1, MW-2, and MW-3 at the locations shown on Figure 2. Soil boring and well <br /> construction logs are contained in Appendix A. During installation of the monitoring wells, soil <br /> 4— <br /> w:\9S 122Vepotts\Request for NFAdoc 1 <br /> i.+ <br />