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' Mr John Benedict Project 880039 October 17, 2000 Page 3 REMEDIATION SYSTEM STATUS- THIRD QUARTER 2000 ' The remediation system consists of a Stealth Bobcat Catalytic Oxidizer rated at 100 cubic feet per minute (cfm) Startup of the remediation system occurred on February 3, 2000, under the ' supervision of regulatory personnel Subsequently, IT staff perform weekly system operation and maintenance (O&M), and collect influent and effluent air samples monthly in accordance with air r board permit requirements ' Soil vapor samples were collected from influent and effluent sample ports on July 10, August 7, and September 7, 2000 The samples were submitted to Sequoia Analytical for analysis of TPH- ' g and BTEX using USEPA Methods 8015 and 8020, respectively Influent TPH-g concentrations on July 10, August 7, and September 7 were reported to be 504, 3,180, and 4,800 milligrams per cubic meter (rng/rn), respectively The corresponding effluent TPH-g concentrations were not detected above the laboratory reporting limit Benzene was not detected above the laboratory reporting limit in the influent samples collected on July 10 and September ' 7 Benzene was detected in the influent sample collected on August 8 at a concentration of 1 70 Mg/M3, but was not detected in any of the effluent samples System operational and performance data is summarized below and in Tables 1 through 3, located in Appendix D O&M field sheets, ' laboratory analytical reports and calculations are also presented in Appendix D i ' Performance Summary Total pounds TPH-g removed since startup 2,273 ' Total pounds TPH-g removed during this reporting period 856 Total pounds benzene removed smce startup 2 Total pounds benzene removed during flus reporting period 028 ' Average flow rate for flus reporting period(acfm) 48 System uptime during this reportmg period(%) 60 ' Current TPH-g daily removal rate(pounds per day) 19 TPH-g and benzene destruction efficiency(%) X99 ' CONCLUSIONS ' Analytical results of collected groundwater samples were generally consistent with previous sampling events Groundwater elevation decreased 109 feet from the previous sampling event (May 2000) Approximately 856 pounds of TPH-g and 0.28 pounds of benzene were removed ' during the third quarter Destruction efficiencies are greater than 99% indicating the system is operating consistent with permit requirements SAC 111SACRFPIICommomConsulAngldata\Shared\PrglectsMzsc18800391A ab doc-00\ta 1 rrcoAPormnon (01010000) 1