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a <br /> S Ec0R <br /> . Quarterly Remedial Performance Summary <br /> October 29, 2004 <br /> Page 2 <br /> and oxidation reduction potential (ORP) readings in monitoring wells MW-2R and MW-4 on August <br /> 19 and September 16, 2004 Results of monthly groundwater sampling events are summarized in <br /> Table 2 Certified laboratory analytical reports and chain-of-custody documentation for the <br /> groundwater monitoring events conducted during the third quarter of 2004 are provided in <br /> Attachment B <br /> If you have any questions, please contact us at(916) 861-0400 <br /> Sincerely, <br /> SECOR International Incorporated <br /> OQ?,OF ESS1o,v <br /> E BEIy,���F2 <br /> Amy Draffan J 01 f 2 <br /> Protect Engineer a C 583 9 "� rn <br /> n EXP 12/31/2406 <br /> s� CIVIL <br /> Rusty E Benko y, P E q <br /> Senior Engine ' TEOFCAL�FO� <br /> Attachments Figure 1 —Site Plan <br /> Figure 2—VW-1 TPHg, Benzene, MtBE, and TBA Groundwater Concentrations <br /> Figure 3— MW-2R TPHg, Benzene, MtBE, and TBA Groundwater Concentrations <br /> Figure 4— MW-4 TPHg, Benzene, MtBE, and TBA Groundwater Concentrations <br /> Table 1 —Ozone Infection System Operating Data <br /> Table 2—Ozone Infection System Groundwater Monitoring Data <br /> Attachment A—Field Data Sheets <br /> Attachment B—Certified Analytical Reports and Chain of Custody Documentation <br /> cc Ms Vicki McCartney, San Joaquin County Environmental Health Department <br /> Mr James Barton, RWQCB --Central Valley Regional Water Quality Control Board <br /> Mr Kyle Christie, BP <br /> RB/ad <br /> • <br /> 11ConocoPhdhpslTosco Marketing1111931ReportslQRPS111193 3QO4 QRPS doc SECOR International Incorporated <br />