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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 injected 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 10S50 FID 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 /> During the initial month of operation, three effluent samples were <br /> obtained during the day and analyzed using the 10550 chromatograph. <br /> The highest value is used to calculate the VOC poundage per day <br /> produced Presently, an influent and an effluent sample are <br /> obtained upon arrival to the site . Ad3ustments are then made to the <br /> vapor extraction system removal of liquids from the condensation <br /> traps , closing the air dilute valve to maximize vapor removal, <br /> without causing the REMOX Unit to shut down due to high temperature <br /> shut off (greater than 15500F) , and closing the pump bypass to <br /> create maximum flow and vacuum from the wells Once, these <br /> adjustments have been completed and the system has stabilized, <br /> influent and effluent samples are again obtained, along with samples <br /> from the individual extraction orifices (wells) . The site is then <br /> secured until the next visit <br /> page 3 of R603 , 01/26/93 <br />