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07/02/92 <br /> Unit off on arrival; restart unit. Collect samples from the <br /> influent and effluent of the system for WEGE laboratory. <br /> System set at 65% air dilute . <br /> 07/08/92 <br /> Unit off on arrival ; restart unit. Collect sample from the <br /> influent of the system for WEGE laboratory. System set at 64% <br /> air dilute. <br /> 07/15/92 <br /> Unit off on arrival; restart unit. Check the influent and <br /> effluent from the system and the vapor from the wells using a <br /> Photovac 10550 chromatograph. System set at 58% air dilute. <br /> 07/20/92 <br /> Unit off on arrival; restart unit. Check the influent and <br /> effluent from the system and the vapor from the wells using a <br /> Photovac lOS50 chromatograph. System set at 72% air dilute. <br /> Unit shutdown, will not restart. Decision made to replace <br /> unit. <br /> . 07/21 - 8/17/92 <br /> Unit off awaiting change out of unit. <br /> 08/18/92 <br /> Unit exchange for new unit, new unit starts operation. <br /> 08/26/92 <br /> Unit off on arrival; restart unit. Collect samples from the <br /> influent and effluent of the system and vapor recovery <br /> wells for WEGE laboratory. System set at 78% air dilute . <br /> 09/03/92 <br /> Check the influent and effluent from the system and the vapor <br /> from the wells using a Photovac lOS50 chromatograph. System <br /> set. at 04 $ air: di.-Lute. <br /> The VOC emissions have never exceeded the 52 lb/day emission limit <br /> for the site. No evidence of Dichloroethylene (DCE) , <br /> Trichloroethylene(TCE ) or Tetrachloroethylene (PCE ) were found <br /> auring examination of the cnomatograms of the samples taken to the <br /> WEGE laboratory. <br /> • VAPOR SAMPLING <br /> COLLECTING LABORATORY SAMPLES <br /> page 3 of R603 , 09/10/92 <br />