Laserfiche WebLink
. 15 June 2004 <br /> AGE-NC Project No 95-0142 <br /> Page 9of12 <br /> 32 SVE MASS OF RECOVERED HYDROCARBONS <br /> The hydrocarbon mass (TPH-g) removed during the operating period was calculated using the <br /> following equation M = C•Q•t <br /> where M = cumulative mass recovered (kg) <br /> C = soil-vapor concentration (kg/m') <br /> Q = extraction flow rate (M3/hr) <br /> t= operational period, in hours <br /> The operational time was divided into three time periods Mass of hydrocarbons removed was based <br /> on analysis of soil-vapor samples The mass of extracted hydrocarbons was calculated for each time <br /> period using average hydrocarbon concentrations of influent soil-vapor sample data and average air <br /> flow rates <br /> Approximately 111 gallons of hydrocarbons as gasoline were extracted and destroyed from SVE <br /> network at the site between December 2003 and March 2004 The volume/mass calculations are <br /> attached in Appendix E <br /> 3 3 GROUND WATER TREATMENT RESULTS <br /> Between 11 February and 11 March 2004, the pump-and-treat system was operational Utilizing a <br /> Blue-White industries F-2000 flow meter, a total flow of 80,140 gallons (totalizer) was recorded <br /> during the aforementioned period, a total of 231,216 gallons of water were extracted between 11 <br /> February and 11 April 2004 (Table 3) Based on approximately 80,140 gallons of discharged water <br /> recorded on the meter, AGE estimated that approximately and average of 6,000 gallons of water <br /> were discharged per day <br /> 3 3 1 Laboratory Analysis of Ground Water Samples <br /> TPH-g and BTEX compounds and MTBE were detected in the influent samples from wells EW-1, <br /> EW-2, EW-3, EW-4 and an influent sample The following is a summary of the detected <br /> concentrations <br /> 11 February TPH-g was detected at 18,000 micrograms per liter(µgd), BTEX compounds <br /> were detected at the following benzene at 3,400 µg/1, toluene at 2,000µg/1, ethyl benzene <br /> at 350 µg/1, and xylenes at 1,100 µg/1 MTBE was detected at 72 µg/1 <br /> • 11 March Concentrations detected in the influent sample were as follows TPH-g was <br /> Advanced Geo E nviron mental,Inc <br />