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r VAPOR SAMPLING COLLECTING LABORATORY SAMPLES ' F Influent Sample The influent sample is obtained from a sample port located after the. system vacuum pump before the REMOX Unit . . .Sterile poly tubing . is then used to attach a 1 liter tedlar bag, , fitted with - a special septum "valve" and tubing bib, 'to :the sample port . The sample port is on the pressure side of the pump and therefore the bag will fill without need of a pump. Once the tedlar bag is filled, , its -valve is: closed and locked; the appropriate label is placed on the ' tedlar. bag. Effluent Sample A sample port for the effluent is -:,'located in the exhaust stack of the Remox system. The flow pressure from the exhaust .. is great i enough to fill a tedlar bag. Sterile poly tubing is fitted to' the exhaust port and the tedlar bag. Then the sample valve of the �1 tedlar bag is opened and the bag is filled with the sample. Once the tedlar bag is full, the valve is closed and locked, the sample , port closed, and the appropriate label is placed on the bag. The labels for both the influentnand effluent tedlar bag samples show the date, time, sample ID## and analyses to be run. Both the influent and effluent tedlar bag samples are then placed within a cooler, on ice, and are hand delivered to WEGE.' s laboratory ` i that same, day. , t The vapor sample is. then injected into an FID AFlame -Ionizing'' `-'L` . 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 . A duel chromatograph comparison is also ran ' 1 (Photovac. 10S50) to evaluate BTEX, TCE, PCE, and DCE. ON SITE ANALYSIS Besides bag samples collected for; the WEGE laboratory some samples may be run on site using a Photovac 10550 PTD chromatograph. 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 injected directly into the,`.:. . PID chromatograph. The resulting chromatogram is then compared to a standard calibration run on the; same chromatograph prior to the !! sample run. t r .. ' page 3 of R&03 , 04/08/93 } . -..,J,,. -:.vim-. ..,..�rr... ...ti .�...-..,,.....,.....�......�w.. �.,..�.. �,.�...-.�...,. ..