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The information contained herein (or attached hereto) has been <br /> prepared at your request. The information 7s confidential and has been <br /> and will be disclosed only to those in Pacific Telesis Group and Pacific <br /> Bell and Versar Inc , with a need to review this information. <br /> PROJECT SUMMARY <br /> Versar conducted a site assessment of the Pacific Bell Ashley Stockton <br /> Road site (U£-132) , which is located in San Joaquin County, California, on <br /> October 31, and November 1, 1988. The assessment included a review of <br /> records, a physical site inspection, the drilling of four boreholes, the <br /> collection of soil samples for analyses, and associated research. Mr. <br /> Kayo Dokken, Geohydrologist, and Mr. Michael Sellens, Geohydrologist, <br /> conducted the site assessment. Mr. Dokken and Mr. James Frantes, Senior <br /> Geohydrologist, prepared this site assessment report. Mr. Clarence <br /> Johnson, Assistant Manager, Versar West Coast Risk Management Services, <br /> reviewed this site assessment report. <br /> The following brief conclusions summarize the findings of Versar's <br /> assessment: <br /> a Soil contamination, identified as diesel fuel , is present in <br /> significant amounts; low levels of benzene, toluene, ethylbenzene <br /> and xylene are also present. <br /> • The diesel contamination has not migrated off site. The <br /> contamination is confined to an essentially vertical plume, in <br /> close proximity to the former location of the underground storage <br /> tank. <br /> • Remedial action is necessary to clean up the soil contamination <br /> Approved for Release. <br /> G.. <br /> Michael A. Neely Clarence R. /Jghnson <br /> Manager Senior Geohydrologist <br /> West Coast Risk Management Services RPG 4195 <br />