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"COR <br /> s1i <br /> International Incorporated <br /> July 16, 2001 1R IE ^(fv_HWED <br /> Project 077 43506 170 <br /> Mr Harlin Knoll JUL 1 7 2001 <br /> San Joaquin County Public Health Services ENVIRONMFNI HEALTH <br /> Environmental Health Division PERMIT/SERVICES <br /> 304 E Weber Avenue,Third Floor <br /> Stockton, California 95201-0388 <br /> Re Site Assessment Report <br /> Former Chevron Service Station#9-8632 <br /> 575 Grant Line Road <br /> Tracy, California <br /> Dear Mr Knoll <br /> iSECOR International Incorporated (SECOR), on behalf of Chevron Products Company <br /> (Chevron), presents the results and findings of assessment activities performed at the above- <br /> referenced site (Figure 1) The purpose of the site assessment was to further delineate the lateral <br /> and vertical extent of petroleum hydrocarbons in soil and groundwater beneath the site as <br /> described in SECOR's April 19, 2001 Revised Work Plan for Site Assessment A total of fifteen <br /> cone penetration testing (CPT) borings (14 onsite and 1 offsite) were advanced to assess soil <br /> stratigraphy Adjacent to each CPT boring, a second direct-push borehole was advanced to <br /> collect soil and groundwater samples <br /> SITE BACKGROUND <br /> The site is a former service station located at 575 Grant Line Road in Tracy, California The site <br /> is currently a used car lot (Imperial Leasing Ltd) located in a mixed light commercial and <br /> residential area(Figure 2) <br /> Additional site investigation information is summarized in Attachment A <br /> ASSESSMENT ACTIVITIES AND FINDINGS <br /> On May 22 through 24, 2001, SECOR supervised Gregg Drilling &Testing, Inc (Gregg) of <br /> Martinez, California as they advanced 15 direct push borings (CPT-1 through CPT-15) and the <br /> collection of depth-discrete soil and groundwater samples Each CPT boring was monitored <br /> . continuously for soil behavior and pore pressure to approximately 30 feet below ground surface <br /> 3017 Kilgore Road, Suate 100, Rancho Cordova, CA 95670 916 861 0400 916 861 0430 Faa www secor com <br />