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labels (site name, sample location, date, time, and analysis to be performed) are also noted on the COC form. Each person relinquishing custody of the sample set signs the COC form indicating the date and time of the transfer to the recipient . A copy of the COC follows the samples or their extracts throughout the laboratory to aid the analyst in identifying the samples and to assure analysis within holding tames Copies of the COC documentation are included with the laboratory results in Appendix A of this report . MW8 VENTING PROCEDURES WEGE is using LTT vacuum trucks to pull an estimated 7 - 10 feet of water vacuum on MW8, for 2 hours weekly and exhaust directly to atmosphere . This vacuum generates a flow rate of 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 injected 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 }'y $ecoid column. chrvitcatOgrapll l u111pay-lboll A Phocovac iOS50 photo-ionizing gas chromatograph was used to evaluate BTEX, TCE, PCE, and DCE. Carbon dioxide (CO2) concentration is measured from the tedlar bag les b connecting a DrCL it'g.er Lune and pump co 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. 3 R603 APPEND. D