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TECHNOLOGY EVALUATION REPORT, SITE PROGRAM DEMONSTRATION OF THE INTERNATIONAL WASTE TECHNOLOGIES IN SITU STABILIZATION/-SOLIDIFICATION TECHNOLOGY, HIALEAH, FL, VOLUME II
Waterland, L., C. Okoh, AND A. McElligott. TECHNOLOGY EVALUATION REPORT, SITE PROGRAM DEMONSTRATION OF THE INTERNATIONAL WASTE TECHNOLOGIES IN SITU STABILIZATION/-SOLIDIFICATION TECHNOLOGY, HIALEAH, FL, VOLUME II. U.S. Environmental Protection Agency, Washington, D.C., EPA/540/5-89/004b.
A demonstration of the International Waste Technologies (IWT) process, utilizing the Geo-Con, Inc., deep-soil-mixing equipment has been performed under the Superfund Innovative Technology Evaluation (SITE) Program. his was the first field demonstration of an in situ stabilization/solidification process. he demonstration occurred in April 1988 at the site of a General Electric Company electric service shop in Hialeah, FL, where the soil contained polychlorinated biphenyls (PCBs) and localized concentrations of volatile organics and heavy metal contaminants. The demonstrated process mixed in situ the contaminated soil with a mixture of a proprietary additive, called HWT-20, and water. The technical criterai used to evaluate the effectiveness of the IWT process were contaminant mobility, based on leaching and permeability tests; and the potential integrity of solidified soils, based on measurements of physical and microstructural properties. Performance of the Geo-Con deep-soil-mixing equipment was also evaluated. The process did appear to immobilize PCBs. However, because of the very low PCB concentrations in the leachates, caused in part by the low concentrations of PCBs in the soils, absolute confirmation of PCB immobilization was not possible. hysical properties were satisfactory except for the freeze/thaw weathering tests, where considerable degradation of the test specimens occurred. The microstructural analyses showed that the process produced a dense, homogeneous mass with low porosity.