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Both the influent and effluent tedlar bag samples are then placed; within a cooler, on ice, and are hand delivered to WEGE` s laboratory that same day. The vapor sample is then infected into an FID (Flame Ionizing Detector) chromatograph and the resulting chromatogram compared to standard chromatograms of known TFH (Total Fuel Hydrocarbons, gasoline) and BTEX (benzene, toluene, ethlybenzene, and xylenes) concentrations . to evaluatecBTEXatTCEapPCEph CoandrDCEn is also ran (Photovac 10S50) ON SITE ANALYSIS Besides bag samples collected Photovacthe 10S50GPIDlaboratory hromatograph, samples using may be run on site g a The influent and effluent samples are collected from the same ports as the bag samples but 60 cc syringes are used to collect the sample and 0 5 cc of the vapor sample are then infected directly into the PID standard rungon the sameh. The chromatographprioratoithehsampleen prun.ared to a standard r During the initial month of operation, three effluent samples were obtained during the day and analyzed using the 10S50 chromatograph. The highest value is used to calculate the VOC poundage per day produced Presently, an influent and an effluent sample are obtained upon arrival to the site . Ad]ustments are then made to the vapor extraction system- removal of liquids from the condensation traps; closing the air dilute valve to maximize vapor removal, without causing the REMOX Unit to shut down due to high p temperature shut off (greater than 15500F) ; and closing the pp these create maximum flow and vacuum from the wells Once, adjustments have been completed and the system has stabilized, influent and effluent samples are again obtained, along with samples from the individual extraction orifices (wells) The site is then secured until the next visit • page 3 of R603 , 07/09/93