Laserfiche WebLink
1 <br /> • Mr John Benedict Project No 880-039 1A <br />' Page 5 <br /> May 8, 2002 <br /> TPH-g destruction efficiency (%) 95 6 to 100 <br />' TPH- emission rate to atmosphere (pounds per da <0 00 to <0 14 <br /> 9 P (P P Y) <br /> Pounds benzene removed since startup 43 <br />' Pounds benzene removed during this reporting period 006 <br /> Benzene Destruction Efficiency (%) 100 <br /> Benzene emission rate to ( <br /> atmosphere pounds per day) <0 0002 to <br /> p <br /> <0 0014 <br /> Average flow rate for this reporting period (acfm) 37 <br /> System uptime during this reporting period (days/%) 63 days or 75% <br /> CONCLUSIONS <br /> Analytical results of collected groundwater samples from the site were generally consistent <br /> with previous sampling events Groundwater elevation increased an average of 140 feet <br /> from the previous sampling event (November 15, 2001) The observed groundwater gradient <br /> during the first quarter 2002 was 0 002 ft/ft to the northwest Petroleum hydrocarbon <br /> concentrations have continued to decrease since operation of the treatment system in <br /> February 2000 Graphs showing TPHG, benzene, MTBE concentrations, and groundwater <br /> elevations versus time in onsite wells are presented in Appendix E <br /> Approximately 37 6 pounds of TPH-g and 0 06 pounds of benzene were removed during the <br /> first quarter 2002 The system performed in compliance with permit requirements Pulsed <br /> operation of the soil vapor extraction system will begin in the second quarter 2002 <br /> Shaw E & I, Inc will continue to perform quarterly groundwater sampling The next <br />' sampling event is tentatively scheduled for June 2002 <br />' N 1sacDP120021PRAPJ8\880\8800391A tad doc <br />