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u s. <br /> . . <br /> n01 <br /> lid <br /> w <br /> Job No. 00760 <br /> Page; 2 <br /> F.. <br /> is <br /> O U ES <br /> A portable skid containing a vacuum pump, flowmeters, and <br /> vacuum gauges was delivered to the site. A rigid vacuum <br /> line was connected to each existing vacuum extraction well, <br /> and a volume of air was pumped from the well. The capture <br /> radius was noted by recording the vacuum in inches of water <br /> as seen in the other wells. This procedure was repeated at <br /> different flow rates and at different wells. The detection <br /> limit for the vacuum gradient was 0.01 inches of water. <br /> Table ] indicates the results of the testing, <br /> .._ UALITY ASSURANCE AND UAi,TTY CONTRA <br /> F.� <br /> Teflon sealant was used on all threaded joints to prevent <br /> any vacuum loss during the <br /> Pumping operation. <br /> Vacuum pump flow rate and pressures were routinely checked <br /> _ d <br /> _ a <br /> ai <br /> g nst manufacturers performance charts to insure maximum <br /> performance from the pump. <br /> A cylinder of activated carbon was connected to the <br /> - --- --effluent-from the vacuum _- <br /> 2 pip to. prevent the emission of <br />