Laserfiche WebLink
I <br />' 27 September 2005 <br /> AGE-NC Project No 034100 <br />' Page 3 of 4 <br /> as high as 670 µg/1(xylenes,November 2004),however,benzene was only detected on one occasion <br /> (03 January 2005) at a concentration 2 4 µg/1 <br /> MTBE was not detected in any of the above influent SVE air flow samples at concentrations above <br />' laboratory reporting limits <br /> 1 - <br />' Analytical results of SVE air flow samples are summarized in Table 2 The laboratory reports(CTEL <br /> Project Numbers 214-04011024, 214-0411128, 214-0412187, 214-0501003, 214-0501108, 214- <br /> 0502118, 214-0503080, 214-0504251, 214-0506035, 214-0505089 and 214-0506088), QA/QC <br />' reports and chain of custody forms are presented in Appendix B A plot of laboratory analysts of <br /> SVE influent TPH-g air flow concentrations versus time is included in Appendix C <br />' 33 MASS CALCULATION OF RECOVERED PRODUCT <br />' The hydrocarbon mass removed during the SVE operating period was calculated using 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 /> Between 02 November 2004 and 03 June 2005, the SVE unit operated a total of 4,451 6 hours <br />' (Table 3) The average analytical results of the SVE air flow samples (Table 3), average flow rates v <br /> and the operational period were used to calculate the approximate mass of extracted gasoline during <br />' this period <br /> During the above operational period,the weight,mass and volume of hydrocarbons extracted by the <br />' y SVE system was calculated to be approximately 2,374.6 pounds, or equivalent to a volume of <br /> 383.7 gallons of gasoline (Table 3) The volume/mass calculations for extracted hydrocarbons are <br /> - `included in Appendix D <br /> 4.0. SUMMARY AND CONCLUSIONS <br /> 4 i 1 1 <br /> Based on the findings from this investigation, AGE concludes <br /> • Analytical results of SVE inlet vapor concentrations show a consistent trend of decreasing ; <br /> SVE inlet vapor concentrations between November 2004 and June 2005 (Appendix C), <br />' Advanced GeoEnvironmental,Inc <br /> 1 <br />