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rRCn <br /> r <br /> r� Y <br /> March 12, 2001 <br /> Compliance & Closure, Inc TRC Protect No 41-0319-01 <br /> 7020 Koll Center Parkway, Suite 134 <br /> Pleasanton, California 94566-3107 <br /> ATTN MR GARY MULKEY <br /> SITE QUIKSTOP NO 121 <br /> MANTECA, CALIFORNIA <br /> SUBJECT DUAL-PHASE VACUUM EXTRACTION EVENT REPORT <br /> Dear Mr Mulkey <br /> Please find enclosed the results of a Dual-Phase Extraction Event conducted at the Quikstop No <br /> 121 in Manteca, California The one day 8-hour event was conducted on February 22, 2001 The <br /> contents of this report include <br /> Summary Sheet <br /> Figure Site Plan <br /> Tables (1)Dual-Phase Vacuum Extraction Data <br /> (2) Observation Well Data <br /> Charts (1) Influent TPH Concentration and Total Vapor-Phase Hydrocarbons Recovered <br /> Versus Time <br /> (2)Benzene and MTBE Vapor-Phase Concentration Versus Time for MW-1 <br /> Appendix Dual-Phase Vacuum Extraction Field Sheet and Analytical Laboratory Data <br /> Sheets <br /> If you have any questions please call me at(925) 688-2483 <br /> Sincerely, <br /> Z Matthew Rosman <br /> Staff Engineer <br /> • <br /> 5052 Commercial Circle • Concord, California 94520 <br /> Telephone 925 688 1200 • Fox 925 688 0388 <br /> Customer-Focused Solutions <br />