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recovery of the petroleum hydrocarbons, seri Figure SA. <br /> The %cll manifold will be constructed of Bch 40 PVC and will <br /> - - -connect to a 55 gallon condensate drum then-into the two blowers, _ - <br /> which will have a common pump bypass. From the blowers, the vapor <br /> stream will go through another 55 gallon condensate drum prior to <br /> a 10,000 pound cansiter of activated charcoal. This canister will <br /> exhaust zntc two 85 pound activated charcoal tub scrubs placed in <br /> series. Sample ports will be located prior to condensate drum 1, <br /> the pump bypass, at the influent of each pump, at the exhaust of <br /> each pump, at the exhaust of the pump bypass, and prior to <br /> condensate drum 2, at the influent and effluent of the 10,000 <br /> pound dumpster, and at the effleunt of each of the 85 pound tub <br /> scrubs, see Figure 5B. <br /> and <br /> and V <br /> � ,� b � ��ittd ace s a�iirelTl condensate drums, and <br /> IVIV <br /> I IM4i 1 1 im Ig Ob t �id> `om,­;th=4- vapor <br /> —16 <br /> mom <br /> B� . ' d `If'Zi� tb � c�,uro�a��� �txo . Baarc $ �34 ,r 1�9,58�. <br /> ¢ A monthly influent and effluent samples will also be obtained and <br /> analyzied by Chemtech Labtories using EPA method 602 for BTEX. <br /> i <br /> F Once breakthrough occur&, between the 10,000 pound dumpster and the - - <br /> 85 pound tub scrub, a complete sampling as described above will be <br /> undertaken and the system shut down, while the 10,000 pound <br /> dumpster is sent to Cameron Yakima for disposal or rejuvination. <br /> A determination will then be made as to the economics of continued <br /> use of the 10,000 pound dumpster or placing two parallel sets of 3 <br /> 85 pound tub scrubs in series, a total of 6, to complete the vapor <br /> extraction for soil remediat4on. <br /> VAPOR EXTRACTION PRACEEDURES <br /> Prior to manifolding the wells, to be used for vapor extraction, <br /> to the treatment compound, a 6 mil polyethylene liner will be <br /> positioned so as to completely cover the excavated areas and <br /> overlap onto the existing asphalt surface to help seal against <br /> vertical surface influence during vapor extraction. This seal <br /> will also protect from infiltration of surface water (rain) from <br /> migrating through: and saturating the vadose zone to be treated. <br /> page 5 <br />