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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 the <br /> system vacuum pump before the REMOX Unit Sterile poly tubing is <br /> then used to attach a I 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 placed on the tedlar <br /> 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 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, ethlybenzene, and xylenes) <br /> concentrations A duel chromatograph comparison is also ran <br /> (Photovac 10550) to evaluate BTEX, TCE, PCE, and DCE. <br /> ON SITE ANALYSIS <br /> Besides bag samples collected for the WEGE laboratory some samples <br /> may be run on site using a Photovac 1GS50 PID chromatograph. <br /> The influent and effluent samples are collected from the same ports <br /> as the bag samples but 60 cc syringes are used to collect the sample <br /> and 0 . 5 cc of the vapor sample are then injected directly into the <br /> PID chromatograph The resulting chromatogram is then compared to <br /> a standard calibration run on the same chromatograph prior to the <br /> sample run. <br /> page 3 of R603 , 05/23/93 <br />