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Mr James Barton Project No 880-039 1A 01050000 <br /> October 22, 2003 <br /> rPage 5 <br /> Third Quarter 2003 System Performance Summary <br /> ry <br /> Pounds TPHg removed since startup 3,188 <br /> Pounds TPHg removed during this reporting period 12 <br /> TPHg daily removal rate during reporting period(pounds per day) 028 <br /> TPHg destruction efficiency(%) 96 <br /> TPHg emission rate to atmosphere(pounds per day) X010 <br /> Pounds benzene removed since startup 46 <br /> Pounds benzene removed during this reporting period 01 <br /> Benzene Destruction Efficiency(%) 95 <br /> Benzene emission rate to atmosphere(pounds per day) <0 003 <br /> Average flow rate for this reporting penod (scfm) 36 <br /> System uptime during this reporting period(days/%) 46 days 151% <br /> CONCLUSIONS <br /> Analytical results of groundwater samples collected from the site were generally consistent <br /> with previous sampling events Groundwater elevation decreased between 0 76 and <br /> 0 86 feet from the previous sampling event (May 29, 2003) in all wells except well <br /> MW-4R-S, which increased by 2 98 feet The observed groundwater gradient during the <br /> third quarter 2003 was 0 008, with flow to the northeast Graphs showing TPHg, benzene, <br /> MTBE concentrations, and groundwater elevations versus time in wells MW-1R, VW-2, <br /> and VW-3 are presented in Appendix E <br /> Approximately 12 pounds of TPHg were removed during the third quarter 2003 The <br /> system performed in compliance with permit requirements Pulsed operation of the SVE <br /> system began In the second quarter 2002, and continued during the third quarter 2003 <br /> Shaw will continue to perform quarterly groundwater sampling The next sampling <br /> event is tentatively scheduled for November 2003 <br />�i <br /> N lsacbP120031Pcj1$$01$$00391A Sag doe Shaw Environmental,Inc <br />