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26 April 2002 <br /> AGE-NC Protect No 95-0173 <br />' Page 5 of 8 <br />' 43 RESULTS OF SOIL VAPOR EXTRACTION <br /> Between 01 October 2001 and 31 December 2001, the SVE and IAS remediation systems were <br />' operational for approximately 1,822 hours(Table 7) During the operational period, SVE inlet flow <br /> rates ranged from 80 to 120 cubic feet per minute (Table 5), differential pressures ranged between <br /> 2 4 and 4 5 inches of water, and induced vacuum between 24 and 39 inches of water Utilizing a <br />' photo ionization meter(PID),hydrocarbon concentrations were measured between I 1 and 140 parts <br /> per million(ppm)at regular intervals at the SVE inlet Field measurements are summarized in Table <br /> 6 <br /> 4 4 ANALYTICAL RESULTS OF VAPOR EXTRACTION AIR FLOW SAMPLES <br /> 1 ° <br /> SVE air flow samples were collected on 15 October, 07 November and 10 December 2001 TPH-g <br /> was detected in all three influent SVE air flow samples at concentrations as high as 1,400 µg/l,TPH- <br />' g was detected in one effluent SVE air flow sample at a concentration of 190 µg/1 <br /> BTEX compounds were detected in all three influent SVE air flow samples at concentrations as high <br /> lie as 140 µg11 (xylenes, 15 October 2001) The maximum benzene concentration was detected in the <br /> 15 October 2001 at a concentration of 2 6 µg/1,BTEX constituents were detected in all three effluent <br /> SVE air flow samples at concentrations as high as 8 2 µg/l Analytical results of SVE air flow <br />' samples are summarized in Table 5 The laboratory reports(McCampbell Analytical Laboratory I D <br /> Nos 80939-40,83113-14 and 85703-04) and chain-of-custody forms are presented in Appendix D <br />' A plot of laboratory analysis of SVE influent TPH-g air flow concentrations versus time is included <br /> with Appendix E <br />' 4 5 MASS CALCULATION OF RECOVERED PRODUCT <br />' The hydrocarbon mass removed during the SVE operating penod was calculated using the equation <br /> M= C.Q.t <br /> where M =cumulative mass recovered (kg) <br /> C, =vapor concentration Ckg/m') <br /> Q = extraction flow rate (M3/hr) <br /> t=operational period, in hours <br /> Between 01 October 2001 and 31 December 2001 (fourth quarter 2001), the SVE unit operated a <br /> 1 total of 1,822 hours(Table 7) The average analytical results(approximately 1,200 µg/l)of the SVE <br />■ air flow samples (Table 5), average flow rates(approximately 82 cfm,Table 6) and the operational <br />' Advanced GeoEnvironmental,Inc <br />