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�� i operation and Maintenance Operation of the Solleco 500 cfm SVE system was started on May 16, 2005, in the presence of SJVAPCD personnel The SVE system was shutdown subsequent to sample collection on May 16, 2005, pending receipt and compliance verification of the analytical results Stratus re-started the SVE system for continuous operation beginning May 20, 2005, after the analytical results for air samples collected on May 16, 2005, demonstrated compliance with the discharge limits identified in the SJVAPCD permit Stratus conducted six site visits after the SVE system was started for continuous operation, to conduct routine operation and maintenance, and to collect the required discharge samples The SVE system was found non-operational during the site visit conducted on May 31, 2005, due to low propane Based on the hour meter readings for May 26 and 31, 2005, the SVE system was likely shutdown on May 30, 2005 The SVE system was re-started on June 1, 2005, after re-filling with propane The SVE system was again found non-operational during the site visit conducted on June 14, 2005, due to low pressure Based on the hour meter readings for June 7 and 14, 2005, the SVE system was likely shutdown on June 10, 2005 The SVE system was re-started on June 14, 2005, after troubleshooting the control for the main gas valve The SVE system appears to be functioning normally since then During the second quarter 2005, the SVE system operated for 535 5 hours between May 16, 2005 and June 17, 2005, with an average operational uptime efficiency of 70 percent The influent GRO concentrations for both May 16 and June 14, 2005, sampling event was 29,000 Mg/M3 The influent benzene concentrations varied in the range of 160 mglm3 (May 16, 2005) to 720 Mg/M3 (June 14, 2005) and the MTBE concentrations varied in the range of less than 100 Mg/M3 (May 16, 2005) to 12 mglm� (June 14, 2005) The average system influent airflow rate to the SVE system was observed at 317 93 cfm at an average applied vacuum of 227 31 inches of water column During the second quarter 2005 (between May 16 and June 14, 2005), approximately 4,338 40 pounds of GRO were extracted and abated • by the SVE system A cumulative mass of approximately 13,963 40 lbs of GRO has been removed from the subsurface by both the two 200 cfm (previously operated) and the current 500 cfm SVE systems The SVE system is operating as designed and is in compliance with the SJVPACD permit requirements ATTACHMENTS • Table 1 Product Monitoring and Removal Summary • Table 2 Groundwater Level Data • Table 3 Groundwater Analytical Summary • Table 4 Groundwater Analytical Results for Oxygenates and Additional Compounds • Table 5 Summary of Wells • Table 6 Flow Rates and Analytical Results of Air Sample Analyses • Table 7 Operational Uptime and Flow Rate for SVE System • Table 8 Extraction and Emission Rates for SVE System • Figure 1 Site Location Map • Figure 2 Site Plan • Figure 3 Groundwater Elevation Contour Map, Upper Water Bearing Zone (2nd Quarter 2005) • Figure 4 Groundwater Elevation Contour Map, Lower Water Bearing Zone (2nd Quarter 2005) • Figure 5 Groundwater Analytical Summary(Second Quarter 2005) • Appendix A Field Data Sheets • Appendix B Sampling and Analysis Procedures • Appendix C Certified Analytical Reports with Chain-of-Custody Documentation and EDF Verification • Appendix D Performance and Operation Summary of King, Buck, &Associates SVE Systems K Bp-Arco for UR516I oo\Quartcrly120051Arco_6100 2Q05 doc STKAWS