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1 Y <br /> a <br /> rI <br /> 1` <br /> 1 r <br /> 15 December 2003 <br /> AGE-NC Project No 98-0448 <br />' Page 6 of 9 ' <br />' 43 RESULTS OF VAPOR EXTRACTION ; <br /> Between 23 June 2003 and 091 October 2003, the SVE' and IAS remediation systems were _ <br />' continuously operational for 2,592 hours, the SVE and IAS systems have totaled 21,760 hours of <br /> operation since Initiation on 16 April 2001 (Table 7) During the above operational period,SVE inlet <br /> flow rates ranged between 33 and 35 cubic feet per minute (efm), differential pressures ranged <br />' between 0 25 and 0 45 inches of water, and induced vacuum measurements ranged'between 62 and <br /> 82 Inches of water Utilizing a'photo Ionization meter(PID), SVE inlet hydrocarbon concentrations <br /> were measured between 3 and 68 parts per million (ppm), generally Field measurements are <br />' summarized In Table 6 <br />' 44 ANALYTICAL RESULTS OF SOIL-GAS VAPOR SAMPLES <br />' SVE air flow samples were collected on 24 July,on 13 August,on 18 September and on 09 October <br /> 2003 TPH-g was detected between 27 µg/1 and 78 pg/1 from the influent SVE air flow samples <br /> collected in July, September and October 2003 TPH-g was not detected above laboratory reporting <br /> limits in the influent air flow sample collected in August 2003 <br /> One or more BTEX compounds were detected in the influent SVE air flow samples collected in July, <br /> September and October 2003 Benzene was only detected in the influent SVE air flow sample <br /> collected in September 2003, at a concentration of 0 38 µg/1 Analytical results of SVE air flow <br /> samples are summarized in Table 5 The laboratory reports (McCampbell Analytical Laboratory , <br /> I Work'Order Nos 0307440, 0308205, 0309366 and 0310161) and chain-of custody forms are <br /> presented in Appendix D A plot of influent TPH-g SVE air flow concentrations versus time is in <br /> Appendix E <br /> F <br /> 4'5 ' MASS CALCULATION OF RECOVERED PRODUCT <br /> 1 <br /> Y r' <br /> The hydrocarbon mass,removed during the SVE operating penod was calculated using the following <br /> equation M= C•Q•t <br /> I ' <br /> where M =cumulative mass recovered (kg) <br /> C =vapor concentration (kg/m3) <br /> Q =extraction flow rate (m3 <br /> /hr) <br /> t operational period, in hours <br /> I _ , <br /> Advanced GeaEnvironmental,Inc <br /> i r <br /> 1 <br />