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samples of influent, and effluent for WEGE laboratory. System <br /> set at 42% air dilute . Adjust unit and sample . <br /> 20/06/93 <br /> Unit off on arrival, restart and Adjust unit . Collect bag <br /> samples of MW1, MW2/3 , MW10, Ex, influent, and effluent for <br /> WEGE laboratory. System set at 0% air dilute . <br /> The VOC emissions have never exceeded the 52 lb/day emission limit <br /> for the site. No evidence of Tetrachloroethylene (PCE) was found <br /> during examination of the chromatograms of the samples taken to <br /> WEGE laboratory, the <br /> VAPOR SAMPLING <br /> COLLECTING LABORATORY SAMPLES <br /> Influent Sample <br /> The influent sample is obtained from a sample port located after the <br /> system vacuum pump before the REMOX Unit . Sterile poly tubing is <br /> then used to attach a 1 liter tedlar bag, fitted with a special <br /> septum "valve" and tubing bib, to the sample port . The sample port <br /> is on the pressure side of the pump and therefore the bag will fill <br /> without need of a pump. Once the tedlar bag is filled, its valve is <br /> closed and locked; the appropriate label. is plac <br /> bag ed on the tedlar <br /> Effluent Sample <br /> A sample port for the effluent is located in the exhaust stack of <br /> the Remox system. The flow pressure from the exhaust is great <br /> enough to fill a tedlar bag Sterile poly tubing is fitted to <br /> exhaust part and the tedlar bag the <br /> Then the sample valve of the <br /> tedlar bag is opened and the bag is filled with the sample. Once <br /> the tedlar bag is full, the valve is closed and locked, the sample <br /> port closed, and the appropriate label is placed on the bag. <br /> The --labels for both the influent and effluent tedlar bag samples <br /> show the date, time, sample ID# and analyses to be run. <br /> Both the influent and effluent tedlar bag samples are then placed <br /> within a cooler, on ice, and are hand delivered to WEGE' s laboratory <br /> that same day <br /> The vapor sample is then infected into an FID (Flame Ionizing <br /> Detector) chromatograph and the resulting chromatogram compared to <br /> standard chromatograms of known TFH (Total Fuel Hydrocarbons, <br /> gasoline) and BTEX (benzene:, toluene, ethylbenzene, and xylenes) <br /> concentrations A duel chromatograph comparison is also ran <br /> (Photovac 10S50) to evaluate BTEX, TCE, PCE, and DCE. <br /> Page 2 of R603, 10/21/93 <br />