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GROUTING TECHNIQUES IN BOTTOM SEALING OF HAZARDOUS WASTE SITES
Citation:
May, J., R. Larson, P. Malone, J. Boa, AND D. Bean. GROUTING TECHNIQUES IN BOTTOM SEALING OF HAZARDOUS WASTE SITES. U.S. Environmental Protection Agency, Washington, D.C., EPA/600/2-86/020.
Description:
Bottom sealing of hazardous waste sites involves the injection or insertion of an inert impermeable and continuous horizontal barrier in soil below the source of contamination. This type of containment strategy could be used in conjunction with other technology such as slurry walls, capping and counterpumping to insure that contaminants do not move from the site into surrounding soil or ground water. The objectives of the project were to determine which types of available grouts would be unreactive with hazardous wastes and how effective direct injection or jet grouting techniques would be in forming a grout barrier. The effectiveness of a complete barrier was not evaluated. Grout formulations used in the study were acrylate, 30% silicate, 50% silicate, urethane and portland cement. These studies indicated that present designs do not permit close enough control to assure a bottom-seal to be formed in all media.