Laserfiche WebLink
Date Sampled Well Online BTEX (ppmv) TPHg (ppmv) <br />' 05/06/2005 V1 028 72 <br /> 05/05/2005 V4 087 5 8 <br /> 05/05/2005 V5 123 96 <br />' 05/04/2005 V7 15 14 <br /> 05/05/2005 V8 049 74 <br /> 05/06/2005 V9 <0 050 <5 0 <br /> 05/06/2005 V10 <0 050 <5 0 <br /> The laboratory data confirmed that all wells could remain offline with the exception of V5 <br />' The average vacuum for the SVE system during the reporting period was 83 inches of water, and the <br /> approximate flow rate was 171 cfm The average SVE system influent TPHg concentration during the <br /> reporting period was 69 parts per million volume (ppmv) <br /> The SVE system removed approximately 343 8 pounds of TPHg, 5 3 pounds of benzene, and 0 1 <br /> pounds of MTBE during the reporting period The SVE system applied vacuum, flow rate, field PID <br /> data, influent TPHg and benzene concentrations, and mass removal data are presented in Table 2 <br /> MTBE removal data are presented in Table 3 A summa of the emissions data is resented in Table 4 <br /> r}' p <br /> SVE well data, including open/closed status, vacuum, flow, and PID data are presented in Table 5 <br /> Graphical presentation of influent concentration and TPHg and benzene mass removal data are shown <br /> on Figures 6 and 7, respectively Copies of the O&M field notes are included in Appendix A Influent <br /> and effluent vapor sample laboratory analytical reports are included in Appendix B <br /> As shown on Figure 6, the SVE system influent contaminant concentrations have demonstrated a <br /> declining trend since September 2002 A detail of this figure (presented as Figure 6A) shows the SVE <br /> influent concentrations from July 2003 to July 2005 A trend line was added to Figure 6A to <br /> demonstrate the declining trend of TPHg and benzene The rate of decline has been slow over the past <br /> twelve months, however, the SVE System removed an average of 3 5 pounds per day of TPHg during <br /> the Third Quarter 2005 reporting period <br /> The number of wells open to vacuum remained the same as in the previous O&M period (V2, V3, and <br /> V6) with the addition of V5 The mass removal trend shown on Figure 7 indicates the rate of mass <br /> removal has remained fairly constant since March 2004 <br /> Project No S8643-06-01 -8- September 28 2005 <br /> I <br />