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59 UMM' <br /> Specification R2l(ZZ_, <br /> Q <br /> potential source of groundwater contairination in the vadose zone. As free water <br /> in the vadese zone is extracted, the yield of contaminants from the soil may be <br /> compromised. The exclusion of precipitation from the treatment cell reduces the <br /> blower energy required for water removal and accelerates remediation. <br /> 6.4 En-ent <br /> Blower design would include a regenerative (or equivalent) vacuum blower system <br /> capable of developing the vacuum flows necessary for the soil treatment method <br /> described in Section 5.0. <br /> 6.4.1 Blower, motor, starter and wiring would be explosion-proof design with <br /> interior and exterior system shutoffs. <br /> 6,4.2 The vacuum blower would have a flow capacity ranging from 50 to 300 cfm; <br /> driven by a 2-HP to 20-HP motor, <br /> 6.4.3 Particulate filters would be installed upstream of the blower. <br /> E 6,4.4 A silencer would be installed on the blower, if necessary. <br /> 6.4.5 Air sampling would be conducted with a sample withdrawal pump. Gas-phase <br /> samples would be recovered from each of the withdrawal taps. <br /> 6.4.6 The system would have a condensate and particle knock-down receiver. <br /> 6.4.7 The system would be provided with automatic shutdown sensors should <br /> critical operating conditions occur. <br /> 6.4.3 The pumping system would be skid-mounted. Installation would require <br /> connection of withdrawal and injection taps to quick-connect manifold fittings <br /> and electrical connection to available power source. <br /> 1-- <br /> 6.4.9 Electrical power requirements would be specified in final design to match <br /> availab:e utilities, if possible, depending on air volumes, pressures, and <br /> vacuums required. <br /> 7.0 Air Ff_11t1tt 1 <br /> /&P_CD m li n _ <br /> 7.1 Off Gas VOGComol <br /> Drawing M-1 presents a MID of the: soil venting system which would be <br /> configured to pass the process air through a carbon adsorption bed or a catalytic <br /> oxidizer during the remediation. The VOCs in the air would be adsorbed on that <br /> carbon bed or oxidized to CO2, and H2O vapor in the catalytic oxidizer. The <br /> treated air would then be discharged directly to atmosphere, 'Ile quantity of <br /> B-7 REMEDIATION <br /> SERVICES, INC. <br />