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' 16 June 2004 <br /> AGE-NC Project No 95-0173 <br />' Page 6 of 9 <br />' summarized in Tables 3 and 4, respectively The laboratory report (CTEL I D 0311-065 and <br /> 0311-092) and chain-of-custody forms are presented in Appendix C <br />' 43 RESULTS OF SOIL VAPOR EXTRACTION <br />' Between 09 September 2003 and 30 December 2003,the SVE remediation system was operational <br /> for approximately 1,745 hours (Tables 6 and 7) The IAS system cycled or operated <br /> contemporaneously with the SVE system During this operational period, SVE Inlet flow rates were <br />' observed to average approximately 86 cubic feet per minute, from a differential pressures observed <br /> at approximately 2 7 inches of water,with induced vacuum measurements observed between 34 and <br /> 66 Inches of water Utilizing a photo ionization meter (PID), hydrocarbon concentrations were <br />' measured at concentrations as high as 1,560 parts per million(ppm) at regular intervals at the SVE <br /> inlet Field measurements are summarized in Table 6 <br /> 4 4 ANALYTICAL RESULTS OF VAPOR EXTRACTION AIR FLOW SAMPLES <br /> lie Influent and effluent SVE air flow samples were collected on 09 September, on 09 October, on 18 <br /> November and on 30 December 2003 TPH-g was detected in all four influent SVE air flow samples <br />' at concentrations between 760 µg/1 and 3,200 µg/l TPH-g was also detected In the September, <br /> October and December 2003 effluent air flow sample at concentrations as high as 220 µg/1 <br /> Various BTEX constituents were detected in all four of the above influent SVE air flow samples at <br />' concentrations as high as 140 pg/1(xylenes,October 2003),benzene was detected in all four influent <br /> air flow samples at concentrations as high as 13 µg/l Low concentrations of toluene or xylenes were <br />' detected from the September, October and December 2003 effluent SVE air flow samples at <br /> concentrations as high as 3 2 pg/l <br /> I Analytical results of SVE air samples are summarized in Table 5 The laboratory reports <br /> (McCampbell Analytical Inc work order nos 0309165,0310160,0311247 and 0312543)and chain- <br /> of-custody forms are presented in Appendix D A plot of laboratory analysis of SVE influent TPH-g <br /> air stream concentrations versus time is included with Appendix E <br /> IAdvanced GeoEnvironmental,Inc <br />