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Ms Lon Duncan Project No 880-039 1A 01010000 August 3, 2004 Page 4 Sampling Results On April 21, May 17, and June 22, 2004, vapor samples were collected from treatment system's influent and effluent Samples were submitted to Severn Trent Laboratories for analysis of TPHg and BTEX using Method EPA-19 TO-3 A summary of TPHg and benzene results are summarized in Tables 2 and 3 Laboratory analytical reports and chain-of-custody documentation are included in Appendix D System Performance Status In the 92 days between March 22, 2003 and June 22, 2004, the treatment system ran 1 approximately 85 days (93 percent operational), removing approximately 24 pounds of TPHg as shown on Table 2 The system's TPHg emissions were approximately 0 14 pounds per day, below the allowable TPHg emission rate of 6 1 pounds per day Benzene destruction efficiency was maintained at approximately 84 percent The burn chamber temperature ranged from 737°F to 758'F, well above the minimum required burn temperature of 600°F (Table 3) System performance data, and calculations are presented in Figures 2 and 3, and field data sheets are included in Appendix D SVE well data are presented in Table 4 iFirst Quarter 2004 System Performance Summary Pounds TPHg removed since startup 3,238 Pounds TPHg removed during this reporting period 24 TPHg daily removal rate during reporting period(pounds per day) 014 TPHg destruction efficiency(%) 40 TPHg emission rate to atmosphere(pounds per day) 026 lPounds benzene removed since startup 48 Pounds benzene removed during this reporting period 01 Benzene Destruction Efficiency(%) 84 Benzene emission rate to atmosphere(pounds per day) 00004 ' Average flow rate for this reporting period(scfm) 38 System uptime during this reporting period(days/%) 85 days/93% N\sacDP120041Prj188018800391A 4ac doe SHAW ENVIRONMENTAL, INC