ARCHIVED REPORTS_XR0003858 - Laserfiche WebLink

Home Browse Search

2004. The 150 cfm Stealth Bobcat SVE system operated at the site for a total of 13,624 hours and removed approximately 3,467 pounds of TPHG and the carbon adsorption system has operated at the site for a total of 2,124 hours and removed approximately 33.53 pounds of TPHG. The tabulated summaries of performance of previously operated SVE systems are included in Appendix D. SVE System Operation and Maintenance Due to low influent petroleum hydrocarbon concentrations in the extracted soil vapor stream during the first quarter 2005, Stratus operated the SVE system in pulse mode during second quarter 2005. Stratus conducted five site visits during the second quarter 2005 to conduct operation and maintenance of the SVE system, and to collect compliance samples. During the second quarter 2005, the SVE system has operated for approximately 830.7 hours. The influent TPHG concentrations fluctuated from 16 mglm3 at the beginning of the quarter (April 5, 2005) to less than 15 Mg/M3 at the end of second quarter 2005 (May 11, 2005). The average influent airflow rate to the SVE system was observed at 61.80 cfm at an average applied vacuum of 22.7 inches of water column. Figure 4 presents change in influent concentrations of TPHG and the cumulative TPHG mass removed as a result of soil vapor extraction. During the second quarter 2005, approximately 5.83 pounds of TPHG was extracted and abated by the SVE system. As of May 11, 2005, a total of 4,095.14 pounds of TPHG has been removed from the subsurface beneath the site. The SVE system is operating as designed and is in compliance with the SJVAPCD permit requirements. ATTACHMENTS: • Table 1 Groundwater Elevation and Analytical Summary • Table 2 Groundwater Analytical Results for Oxygenates • Table 3 Operational Uptime and Flow Rate • Table 4 Flow Rates and Analytical Results of Air Sample Analysis • • Table 5 Extraction and Emission Rates • Figure 1 Site Location Map • Figure 2 Groundwater Elevation Contour Map (Second Quarter 2005) • Figure 3 Groundwater Analytical Summary (Second Quarter 2005) • Figure 4 Cumulative Mass Removed and Concentrations of TPHG Vs Time • Appendix A Field Data Sheets • Appendix 8 Sampling and Analysis Procedures • Appendix C Certified Analytical Reports and Chain-of-Custody Documentation • Appendix D Performance Summaries for Previous SVE Systems KAUSA Gasolincl00651Qtriy120051USA_65_2QOS.DQC SIRAW5