ARCHIVED REPORTS XR0006449 - Laserfiche WebLink

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approximately 64 cfm COLLECTING SAMPLES The sample is obtained from a sample port located, prior to the vacuum pump from a sample port on the flow meter orifice . Sterile poly tubing was used to attach a one liter tedlar bag, fitted with a special septum "valve" and tubing bib, to the sample port . The sample port is on the vaccum side of the pump and therefore a vacuum greater than the well vacuum must be exerted on the outside of the tedlar bag to "fill" the bag with the vapor sample A special vacuum box, in which the tedlar bag is sealed inside, is used to exert a high vacuum to the exterior of the bag, thereby pulling a sample into the bag Once the tedlar bag is filled, its valve is closed and locked and the appropriate label is placed on the bag The label shows the date, time, sample ID# and analyses to be run and the sampler' s initials The tedlar bag samples are then placed within a cooler, 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 TPHg (Total Petroleum Hydrocarbons, gasoline) and BTEX (benzene, toluene, ethylbenzene, and xylenes) concentrations . Selected samples are also analyzed by second column chromatograph comparison A Photovac 10550 photo-ionizing gas chromatograph was used to evaluate BTEX, TCE, PCE, and DCE . Carbon dioxide (CO2) concentration is measured from the tedlar bag samples by connecting a Drager tube and pump to the inlet/outlet of the tedlar bag CO2 reading in percent is then obtained and recorded on the chrmoatogram produced from the GC-- FID analysis . Vapor Recovery System Monitoring and Sampling INFLUENT SAMPLE The influent sample is obtained from a sample port located on the pressure side of the blower A 1 liter tedlar bag, fitted with a special septum vui�.. t.,.,, "valve" and t,;hir�rr 1-1-ibb , s attach the sample port with sterile poly tubing Then the sample valve of the 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 MW1 , MW2/3 , EX AND MW10 VAPOR RECOVERY LATERAL SAMPLES Sample ports are located at the orifice plate for each lateral , these laterals are under vacuum A 1 liter tedlar bag, fitted 4 R603 APPEND. E