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EFFLUENT <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 infected into a 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 /> ON SITE ANALYSIS <br /> In addition to the bag samples collected for the WEGE laboratory <br /> samples may be run on site using a Photovac 10550 PID <br /> chromatograph. <br /> The influent and effluent samples are collected from the same <br /> ports as the bag samples but 50 cc syringes are used to collect <br /> the sample and 0 . 5 cc of the vapor sample are then in3ected <br /> directly into the PID chromatograph. The resulting chromatogram <br /> is then compared to a standard calibration run on the same <br /> chromatograph prior to the sample run. <br /> During the initial month of operation, three effluent samples were <br /> obtained during the day and analyzed using the 10S50 <br /> chromatograph. The highest value is used to calculate the 170C <br /> poundage per day produced. Presently, an influent and an effluent <br /> sample are obtained upon arrival to the site. Adjustments are <br /> then made to the vapor extraction system: removal of liquids from <br /> the condensation traps; closing the air dilute valve to maximize <br /> vapor removal, without causing the REMOX Unit to shut down due to <br /> nigh temperature shut off (greater than 15501F) ; and closing the <br /> pump bypass to create maximum flow and vacuum from the wells. <br /> Once, these adjustments have been completed and the system has <br /> stabilized, influent and effluent samples are again obtained, <br /> along with samples form the individual extraction orifices <br /> (wells ) . The site is then secured until the next visit. <br /> 4 <br />