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04/21/92 <br /> . Sample the influent and effluent from the system and the <br /> vapor from the wells using a Photovac 1OS50 chromatograph. <br /> Flow rate 83 cfm. <br /> 04/24/92 <br /> Sample the influent and effluent from the system and the <br /> vapor from the wells using a Photovac lOS50 chromatograph. <br /> a <br /> Flow rate 84 cfm. <br /> 05/14/92 <br /> I <br /> Sample the influent and effluent from the system and the <br /> ' vapor from the wells using a Photovac lOS50 <br /> chromatograph. Flow rate 84cfm. Change out carbon canisters . <br /> Replacing the two TSU 110 with two TSU 85 . Total absorbed <br /> weight 215 pounds. <br /> �I 05/21/92 <br /> Collect samples of the influent and effluent of the system <br /> for analysis at WEGE laboratory. Flow rate 82.5 cfm, <br /> 06/2/92 <br />• Collect samples of the influent and effluent of the system <br /> for analysis at WEGE laboratory. Flow rate 67 cfm. Remove 60 <br /> pounds of absorbed carbon and add 125 pounds of clean carbon. <br /> 06/2/92 <br /> Collect influent and effluent samples of the system and <br /> vapor samples from P3 , EX, MW1 and MW5 for analysis at WEGE <br /> laboratory. Flow rate 68 cfm. Change out carbon in canisters . <br /> The VOC emissions have never exceeded the 5 lb/day emission limit <br /> or the 100 scfm set for the site, with the exception of the April <br /> 17 , 1992 system check, when breakthrough was discoved and the <br /> system was immediately shut down ( 409 hours of operation) and <br /> rejuvenated carbon was exchanged for the spent carbon in the <br /> canisters prior to restarting the system. <br /> R604 vapor , 6/19/92, p. 3 <br />