ABSTRACT
The Environmental Protection Agency (EPA) is responsible for evaluating the suitability of hazardous waste and materials for land disposal. Chemical stabilization/solidification (S/S) is one technique that has been proposed as a means for controlling the release of contaminants from landfilled wastes to surface and ground waters. The sludge was dewatered to approximately 30% solids using a rotary drum vacuum filter. The portland cement/fiyash interference/binder/waste mixture showed a consistent decrease in unconfined compressive strength (UCS) for all interference materials. With the exception of trichloroethlyne and hexachlorobenzene, the addition of organic interfering materials had a consistently negative impact on the 28-day UCS of the lime/flyash interference/binder/sludge mixture. The addition of oil or grease at a 0.08 ratio resulted in a 32% and 54% decrease, respectively, in 28-day UCS.
