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02 April 2013 <br /> AGE-NC Project No. 95-0130 <br /> Page 4 of 9 <br /> of the submitted laboratory electronic deliverable format (EDF) files. A plot of laboratory <br /> analysis of SVE influent TPH-g air stream concentrations versus time is included with <br /> Appendix B. The laboratory report (CTEL Project Nos. CT214-1210042, -1211053 and - <br /> 1212109) quality assurance and quality control (QA/QC) and chain of custody forms are <br /> presented in Appendix C. <br /> 2.3.3. Mass Calculation of Recovered Product <br /> The hydrocarbon mass removed during the SVE operating period was calculated using <br /> the equation: <br /> M = C•Q•t <br /> where: M = cumulative mass recovered (kg) <br /> C = vapor concentration (kg/m3) <br /> Q = extraction flow rate (m3/hr) <br /> t = operational period, in hours <br /> During the 4`h quarter 2012(13 September and 18 December 2012),the SVE unit operated <br /> a total of 2,238 hours (i.e. approximately 93 days). The average analytical results of the <br /> influent SVE samples (Table 1), the average diluted SVE influent flow rates (Table 2) and <br /> the operational period (Table 3)were used to calculate the approximate mass of extracted <br /> gasoline during this period. <br /> During the 4`h quarter 2012 operational period, the total mass of hydrocarbons extracted <br /> by the SVE system was calculated to be approximately 249 pounds, or equivalent to a <br /> volume of approximately 40 gallons of gasoline. Based on the above mass and time <br /> period, total petroleum hydrocarbon (gasoline) SVE extraction rates were estimated to be <br /> between approximately 2 to 4 pounds/day. Added to the 24,091 pounds of petroleum <br /> hydrocarbons estimated to have been removed by SVE remediation since September 2004 <br /> (start-up), the total mass of hydrocarbons extracted with SVE to date is estimated at <br /> 24,340 pounds (Table 3). <br /> 3.0. INTERIM GROUNDWATER EXTRACTION REMEDIATION <br /> Between 19 September and 18 December 2012, an interim GWET remediation system <br /> was operated at the site. The groundwater treatment operation and maintenance <br /> procedures for the site were outlined in AGE's Interim Remediation Work Plan-May 2003, <br /> dated 21 May 2003. <br /> Advanced GeoEnvironmcntal,Inc. <br />