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i_ ,rte THE CYCLO-PURGE SYSTEM by Wastemizer Corporation Nesconsel,L.I.,New York EXECUTIVE ABSTRACT ' The Cyclo-purge (Patented) by Wastemizer allows inexpensive, in situ, remediation of soil contaminated with solvents, fuels, and also semi-volatile materials. Atmospheric emissions are eliminated by using a "closed-loop" flow path. The treated stream of air is re-injected into an underground well to evaporate the solvent in place, and then is extracted through an adjacent well to be brought up to the surface. The air is passed through a heat pump to first cool, then reheat the air before reinjecting it back into the ground. During the cooling process the solvent vapor is condensed and collected as a liquid in an appropriate receiver. The soil is left in place when using this method of remediation, saving on the costs of excavation, freight and disposal. The high cost of landfill disposal, soil incineration and/or air emission control apparatus are completely eliminated. Overall remediation costs can be reduced as much as go% using the Wastemizer Cyclo-Purge System. An associated feature of the Cyclo-Purge System is the optional use of granular activated carbon (GAC;. Soil vapor can be cleaned to virtual purity by incorporating GAC into the closed loop. On-site regeneration of the saturated GAC, using the Cyclo- Purge apparatus, is done for approximately three cents per pound. The liability of transporting manifested hazardous waste is completely eliminated. DETAILED PROCESS DESCRiPTiON The Cyclo-Purge System permits the in-place, removal of volatile organic contaminants (VOC) from a permeable, soil formation with no vapor emission to the atmosphere. This can be achieved by using the principle of closed-loop air --- ------ - -----recirculation:---This--process-sAminates-the necessity to obtain an atmospheric emission, regulatory permit. The traditional approach, which discharges residual air to the atmosphere, must obtain a costly permit.