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Mr Mike Infurna <br /> March 27,2006 <br /> C A M B R I A <br /> . CLOSING <br /> Please call Christene Sunding at (916) 677-3407 (ext 109) if you have any questions or comments <br /> regarding this investigation <br /> Sincerely, <br /> Cambria Environmental chnology, Inc <br /> Christens undi <br /> Senior Staff Geologist <br /> Michael D Miller P G #6008 <br /> Senior Project Geologist1 <br /> r <br /> Figures 1 —Vicinity Map <br /> 2—Site map <br /> 3 —MTBE Isoconcentration Map at 20-24 fbg <br /> 4—MTBE Isoconcentration Map at 20-31 flag <br /> 5 —MTBE Isoconcentration Map at 40 fbg <br /> 6—Cross-section A-A' TPHg in Soil Concentration Contours <br /> 7—Cross-section A-A' Benzene in Soil Concentration Contours <br /> 8 —Cross-section A-A' MTBE in Groundwater Concentration Contour <br /> Tables 1 — Site Conceptual Model <br /> 2—Historical Soil Sample Results <br /> 3 —Historicai Grab-groundwater Sample Results <br /> 4—Estimated TPHg Mass Remaining in Soil <br /> 5 —Estimated Benzene Mass Remaining in Soil <br /> 6—Estimated MTBE Mass Remaining in Groundwater <br /> Attachments A—Regulatory Correspondence <br /> B—Boring Logs and Permits <br /> C—Laboratory Analytical Results <br /> D—Standard Operating Procedures <br /> cc Mr Dana Thurman, Chevron Environmental Management Company, P O Box 6012, <br /> K2236, San Ramon, CA 94583 <br /> 7 <br />