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d + <br /> 4 <br /> P&SUft Report for Air MoaUft of <br /> f &Wded Pitt Vapor B&actbn Test r <br /> 4445 Pershing Avenue,Stockton,Callfornia <br /> On January 3, 1992, concentrations of TPH indicated in the influent air were measured i <br /> at 28, 31, and 29 parts-per-million by volume <br /> in the effluent air were measured at 40, Opp and40 <br /> nd concentrations of TPH indicated <br /> The January ua 7 <br /> 1992, <br /> measurements indicated influent at 42, 38, and 36 ppmv and effluent at 0 40 and i <br /> 40mv. The <br /> pp January 14, 1992, measurements on VEW-1, indicated influent at 5,500, i <br /> 6,000, and 6,500 ppmv and effluent at 40, 40, and 40 ppmv. The January 21, 1992, k <br /> measurements indicated influent at 60, 90, and 80 ppmv and effluent at 40, 40, and 40 <br /> ppm. Parameters that could possibly affect the effluent readings, thereby indicating <br /> inflated values, could be: a) increase in air stream temperature; b) sampling apparatus <br /> (high temperature could allow for a release of volatiles inlastic tubing);g); c} instrument <br /> calibrations and sensitivity to heat; and d) increase in concentrations of carbon dioxide, <br /> carbon monoxide, and water due to the combustion of propane. Table 1 summarizes the <br /> field monitoring data. <br /> Radius of influence parameters monitored on January 14, 1992, indicated when the unit i <br /> induces a vacuum of -68.2 inches of water with a flow rate of 38.6 cubic feet per minute <br /> (cfm) solely on VEW-1, MW-4 indicates a vacuum of -0.23 inches of water. When the unit <br /> induces a vacuum of -66.7 inches of water with a flow rate of 39.6 cfm solely on VEW-2, <br /> MW-4 indicates a vacuum of -0.01 inches of water (Figure 2). Vacuum in each well was <br /> measured by inserting a magnehelic gauge in the top of the well and taking vacuum <br /> readings (in inches of water) from the gauge. <br /> r ' <br /> J <br /> 1 <br /> ,b <br /> h <br /> } <br /> 89-01 SJ.APT a <br />