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C*ATc <br /> %.01 <br /> ASSOCIATES 1 NC . <br /> Following sample collection, each open borehole was grouted to the surface with neat cement. <br /> The State-certified mobile on-site laboratory provided by Mobile Chem Labs Inc. analyzed <br /> groundwater samples. <br /> LaboratoCLAnalysis and Results—Groundwater <br /> The groundwater samples collected from the northeastern portion and southeastern portion of the <br /> Property were analyzed for TPHg, BTEX, and MTBE by EPA Methods modified 8015 and 8020, <br /> respectively. The groundwater sample collected from the southeastern boring was also analyzed <br /> for HVOCs/VOCs by EPA Methods 8010/8020. <br /> No analytes were detected above laboratory method detection limits. Groundwater analytical <br /> results are summarized in Table 2. Laboratory data sheets and chain of custody documentation is <br /> included in Attachment 1. <br /> FORMER UNOCAL SITE— 1665 PACIFIC AVENUE <br /> ATC's March 1998 ESA for the Property and the adjacent northern property was performed for <br /> SUSD to evaluate the feasibility of title transfer. The PHS/EHD Site Mitigation file, which <br /> summarizes site investigation and remediation activities was not available at the time the ESA was <br /> being performed. ATC was informed that the San Joaquin County District Attorney's office was <br /> in possession of the file and so it was not available for public viewing at the time of the request. <br /> However, on December 9, 1997, Stephanie L. Burdett of Stephen R. Clark Appraiser and <br /> Consultant Inc., reviewed the Site Mitigation File for the subject site. Selected portions of the <br /> file's content were photocopied and forwarded to ATC for review. Following is a brief summary <br /> of the information supplied to ATC during the March 1998 ESA: <br /> • Former UNOCAL Service Station 2859 was located on the subject site as early as <br /> 1947 and was completely remodeled in 1967. The station was demolished in 1988 <br /> and included the removal of two 10,000-gallon USTs from a common excavation <br /> along with a separate 550-gallon waste oil tank (Pacific Environmental Group, <br /> August 1993). <br /> • During tank removal, 1,100 cubic yards of soil were removed from the site. The <br /> excavation extended to a depth of 30 feet bgs where soil samples collected at the <br /> base of the excavation indicate a maximum of 18 parts per million (ppm) total <br /> petroleum hydrocarbons as gasoline (TPHg) and 1.7 ppm benzene remain (Pacific <br /> Environmental Group, August 1993). <br /> W:117292.05\Summaryrpt.doc 4 <br />