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VAPOR SAMPLING <br /> • COLLECTING LABORATORY SAMPLES <br /> Influent Sample <br /> The influent sample is obtained from a sample port located after <br /> the system vacuum pump before the REMOX Unit. Sterile poly tubing <br /> is 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 <br /> fill without need of a pump Once the tedlar bag is filled, its <br /> valve is closed ana locked; rhe appropriate label Is placed on the <br /> tedlar bag. <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 the <br /> exhaust port and the tedlar bag. 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 <br /> laboratory that same day. <br /> The vapor sample is then inDected 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, ethlybenzene, and xylenes) <br /> concentrations . <br /> page 3 of R603 , 11/18/92 <br />