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40 Vapor Recovery System Monitoring, and Samnlincr <br /> INFLUENT SAMPLE <br /> The influent sample is obtained from a sample port located on the <br /> pressure sande of the blower A 1 liter tedlar bag, fitted with a <br /> special septum "valve" and tubing bib, is attach the sample port <br /> with sterile poly tubing Then the sample valve of the tedlar <br /> bag is opened and the bag is filled with the sample. Once the <br /> 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 /> MW1, MW2/3 , EX AND MW10 VAPOR RECOVERY LATERAL SAMPLES <br /> Sample ports are located at the orifice plate for each lateral, <br /> these laterals are under vacuum A 1 liter tedlar bag, fitted <br /> with a special septum "valve" and tubing bib, is placed within an <br /> air tight vacuum sample box (ATVSB) Sterile poly tubing is then <br /> used to attach the intake port of the ATVSB to the tedlar bag. <br /> Sterile poly tubing is also used to attach the intake of the <br /> ATVSB to the sample port of the orifice plate The exhaust port <br /> for the ATVSB is then attached to a vacuum pump which creates a <br /> vacuum inside the ATVSB allowing the tedlar bag to pull the <br /> sample from the valved manifold sample port without the danger of <br /> cross contamination, as could occur when using an in-line pump. <br /> Once the tedlar bag is filled, its valve is closed and locked and <br /> the appropriate label is placed on the tedlar bag <br /> EFFLUENT <br /> A sample port for the effluent is located at the exhaust of each <br /> carbon unit The flow pressure from the exhaust is great enough <br /> to fill a tedlar bag without the need of the ATVSB Sterile poly <br /> tubing is fitted to the exhaust port and the tedlar bag Then <br /> the sample valve of the tedlar bag is opened and the bag as <br /> filled with the sample Once the tedlar bag is full, the valve <br /> is closed and locked, the sample port closed, and the appropriate <br /> 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 were Chain of <br /> Custody hand delivered to WEGE' s laboratory that same day <br /> WEGE' s laboratory analyzes the vapor samples by inDection into an <br /> FID (Flame Ionizing Detector) chromatograph The resulting <br /> chromatogram is compared to standard chromatograms of known TFH <br /> (Total Fuel Hydrocarbons, gasoline) and BTEX (benzene, toluene, <br /> ethylbenzene, and xylenes) concentrations CO2 measurement is <br /> obtained with a Drager tube <br /> 4 R603 APPEND D <br />