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i 28 October 2005 AGE-NC Project No 95-0130 ' Page 7 of 13 MTBE was detected in the April and June 2005 influent SVE air flow samples at concentrations of 41 pg/1 and 22 pg/l, respectively, MTBE was detected in April 2005 effluent air flow sample at a concentration of 7 4 pg/l ' Analytical results of SVE air samples are summarized in Table 5 GeoTracker confirmation pages of the submitted laboratory electronic deliverable format (EDF) files are included in Appendix D ' A plot of laboratory analysis of SVE influent TPH-g air stream concentrations versus time is included with Appendix F The laboratory reports (CTEL Project Nos 0504062 and 0506200) and chain of custody forms are presented in Appendix G I 3 3 3 MASS CALCULATION OF RECOVERED PRODUCT ' The hydrocarbon mass removed during the SVE operating period was calculated using the equation M = C•Q•t ' where M =cumulative mass recovered (kg) C =vapor concentration (kg/m') lieQ =extraction flow rate (m'/hr) t= operational period, in hours ' Between 08 March and 05 April 2005, the SVE unit operated a total of 669 hours (Table 6) The average analytical results(approximately 5000 pg/1)of the influent SVE air flow samples(Table 5), ' average diluted SVE influent flow rates(approximately 60 scfm,Table 6)and the operational period (669 hours) were used to calculate the approximate mass of extracted gasoline during this period During the second quarter 2005 operational period,the mass of hydrocarbons extracted by the SVE system was calculated to be approximately 752 pounds, or equivalent to a volume of 120 gallons of gasoline Added to the estimated 2,220 gallons of hydrocarbons extracted from the SVE system since ' 31 August 2004 (start-up), the total volume of hydrocarbons extracted to date is estimated at 2,340 gallons (Table 7) A plot of the cumulative mass (pounds) of hydrocarbons extracted to date is included in Appendix F,the volume/mass calculations for extracted hydrocarbons are included with ' Appendix H ' 4.0 GROUND WATER EXTRACTION-TREATMENT REMEDIATION Between 08 March 2005 and 03 June 2005, an interim remediation ground water P&T system was ' continuously operated at the site The ground water treatment operation and maintenance procedures for the site were outlined in AGE's Interim Remediation Work Plan-May 2003,dated 21 May 2003 Advanced GcoEnvironmental,Inc