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Ms Lori Duncan Project No 880-039 IA 01010000 <br /> May 12, 2004 <br /> Page 4 <br /> System Performance Status <br /> In the 83 days between December 29, 2003, and March 22, 2003, the treatment system <br /> ran approximately 51 days (61 percent operational), removing approximately 24 pounds <br /> of TPHg, as shown on Table 2 The system's TPHg emissions were approximately <br /> 0 15 pounds per day, below the allowable TPHg emission rate of b 1 pounds per day <br /> TPHg and benzene destruction efficiencies were maintained at approximately 56 and <br /> 58 percent, respectively The bum chamber temperature ranged from 740°F to 755°F, <br /> well above the minimum required burn temperature of 600°F (Table 3) System <br /> performance data and calculations are presented in Figures 2 and 3, and field data sheets <br /> are included in Appendix D Soil vapor extraction well data are presented in Table 4 <br />_ First Quarter 2004 System Performance Summary <br /> Pounds TPHg removed since startup 3,214 <br /> Pounds TPHg removed during this reporting period 24 <br /> TPHg daily removal rate during reporting period(pounds per day) 029 <br /> TPHg destruction efficiency(%) 56 <br /> TPHg emission rate to atmosphere(pounds per day) 015 <br /> Pounds benzene removed since startup 47 <br /> Pounds benzene removed during this reporting period 1 <br /> Benzene Destruction Efficiency(%) 58 <br />�t Benzene emission rate to atmosphere(pounds per day) 00006 <br /> Average flow rate for this reporting period(scfm) 36 <br /> System uptime during this reporting period(days/0%) 51 days/61% <br /> CONCLUSIONS <br /> Analytical results of groundwater samples collected from the site were generally consistent <br /> with previous sampling events Groundwater elevation increased in all wells between <br /> 0 38 and 134 feet from the previous sampling event (November 3, 2003) The observed <br /> groundwater gradient during the first quarter 2004 was 0 04 to the southeast north of the <br /> site, and 0 1 to the northwest beneath the southeastern portion of the site Graphs showing <br /> TPHg, benzene, MTBE concentrations, and groundwater elevations versus time in wells <br /> . MW-IR, VW-2, and VW-3 are presented in Appendix E <br /> N\sacDP\20041Prj188018800391 A 4ab doc SHAW ENVIRONMENTAL,INC <br />