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99 -- REMEDIATION OF VOC CONTAMINATED LOW PERMEABILITY SOILS THROUGH DELIVERY OF AQUEOUS PERMANGANATE SOLUTIONS. SOL RFP2020 POC Karen Bradley, Subcontract Administrator, 865/576-1431; Sonny Rogers, Section Supervisor, 865/576-1434. E-MAIL: bradleykc@ornl.gov, bradleykc@ornl.gov. Tentative Schedule: RFP released June 16, 2000; Proposals due July 16, 2000; and Award announced August 15, 2000. Period of Performance will be September 2000 through December 2000. Fully funded. STATEMENT OF WORK SYNOPSIS Oak Ridge National Laboratory (ORNL), in support of the U. S. Department of Energy, as follows: Dense non-aqueous phase liquid (DNAPL) compounds present in low permeability media (LPM) pose major challenges with assessment of their behavior and implementation of effective in situ remediation technologies. In situ remediation technology development has largely overlooked treatment of DNAPLs in LPM. Poor accessibility to the contaminants and the difficulty in delivery of treatment agents have rendered conventional bioremediation, vapor extraction, and pump-and-treat ineffective for this type of contaminated media. As a result of the need for solutions and the gap in the current knowledge and technology base, a project was initiated to evaluate in situ remediation technologies for bothenhanced mass removal and in place destruction of DNAPL compounds in LPM, specifically chlorinated solvents. A promising in situ remediation approach selected for deployment includes enhanced delivery of permanganate solutions for in place destruction. A Request for Proposal will be solicited for deployment of enhanced delivery of permanganate (either as sodium permanganate or potassium permanganate) to provide in place destruction of volatile organic compounds (VOCs) (TCE, 1,2- DCE, vinyl chloride) in LPM within a ground water plume source area. A secondary objective will be to determine the ability of the technology to treat TPH and PCBs in the area. The area to be treated includes the soils in an area ~100 ft by 100 ft from ~5 ft to ~25 ft bgs within a plume source area to contain and reduce the downgradient plume as currently impacted by the source. As an option the project team may also have the vendor treat an additional smaller area of 10 ft by 10 ft from ~8 ft to 50 ft to determine the applicabilityof the technology and effects of aqueous permanganate delivery within a deeper more permeable matrix. Targeted performance goals are to reduce the volume weighted VOC in soil concentrations such that downgradient groundwater protection standards are met. The results of this deployment will be used to continue the advancement of the in situ remediation technology, work toward developing a standard method of practice for treatment of LPM, and provide interim measures for a ground water plume source area. In addition, these results will be used to evaluate the applicability of the technology for in situ remediation of other LPM sites within the DOE Complex. Posted 05/22/00 (W-SN457319). (0143)

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