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1 <br />' 19 October 2005 <br /> AGE-NC Project No 99-0645 <br />' Page 4 of 6 <br />' effluent SVE sample <br /> 04 May TPH-g and BTEX compounds were not detected from the Influent SVE sample,MTBE was <br />' detected a concentration of 5 1 micrograms per liter(pg/1) TPH-g and BTEX compounds were not <br /> detected from the effluent SVE sample <br />' 17 May TPH-g was detected from the influent SVE sample at a concentration of 120 pg/1, BTEX <br /> compounds were detected at 4 µg/1 ethylbenzene and 7 3 pg/l xylene, MTBE was detected at a <br /> concentration of 11 pg/1 TPH-g and BTEX compounds were not detected in the effluent SVE <br />' sample <br /> 08 June and 18 July Contaminants of concern (CDCs) were not detected in the influent SVE <br />' samples CDCs were not detected in the effluent SVE samples <br /> The analytical results are summarized in Table 2 The laboratory reports(CTEL Project Nos CT214- <br />' 0504131, 0505044, 0505162, 0506081 and 0507105) quality assurance/quality control (QA/QC) <br /> reports and chain of custody forms are included in Appendix C <br /> Extracted organic vapor concentrations measured with the PID were measured at a range of 34 to <br /> 101 ppm-volume (April) <br /> I <br /> 3 2 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 /> Iwhere 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 /> I The estimated mass of hydrocarbons removed was calculated for the period between May and June <br /> 2005 The mass was based on laboratory analysis of soil-vapor samples,the flow rate and operational <br /> time The mass of extracted hydrocarbons was calculated for the time period using average <br /> hydrocarbon concentrations of influent soil-vapor sample data, average air flow rates and duration <br /> of operation The volume and mass calculations are shown below <br /> using <br /> • C�a�r= 60 pg/l micrograms per liter, converted to 0 00006 kg/m' <br /> Advanced GeoEnvironmentat,Inc <br /> I <br />