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APPLICATIONS ANALYSIS REPORT: SITE PROGRAM DEMONSTRATION TEST SOLIDITECH, INC. SOLIDIFICATION/ STABILIZATION PROCESS
Citation:
Grube* Jr., W. E. APPLICATIONS ANALYSIS REPORT: SITE PROGRAM DEMONSTRATION TEST SOLIDITECH, INC. SOLIDIFICATION/ STABILIZATION PROCESS. U.S. Environmental Protection Agency, Washington, DC, EPA/540/A5-89/005 (NTIS 91-129817), 1990.
Impact/Purpose:
to inform the public
Description:
This Applications Analysis Report evaluates the Soliditech, Inc., solidification/ stabilization process for the on-site treatment of waste materials. The Soliditech process mixes and chemically treats waste material with Urrichem (a proprietary reagent), additives, pozzolanic materials or cement, and water, in a ten-cubic yard concrete mixer to form a more stable material. The Soliditech demonstration took place in December 1988 at the Imperial Oil Company/Champion Chemical Company Superfund site in Morganville, New Jersey. Three types of contamination waste material were chosen for this demonstration -- contaminated soil, waste filter cake material, and oily sludge from an abandoned storage tank. The wastes contain PCBs, various metals, and petroleum hydrocarbons. Extensive sampling and analyses were performed on the waste materials both before and after treatment so that physical, chemical, and leaching properties could be compared. The Soliditech process was evaluated based on contaminant mobility, measured by leaching and permeability tests; structural integrity of the solidified material, measured by physical, engineering, and morphological tests; and economic analysis, using cost information supplied by Soliditech, Inc. and supplemented by additional information generated during the demonstration. The conclusions drawn from these evaluations are that: (1) the Soliditech process can solidify waste materials containing high oil and grease concentrations; (2) heavy metals such as arsenic, cadmium, lead, and zinc are successfully immobilized; (3) the short-term physical stability of the treated waste was good, with significant unconfined compressive strength and low permeability; (4) long-term testing of the treated wastes indicates a potential for physical degradation, as evidenced by reduced unconfined compressive strength after 12 cycles of wet/dry and freeze/thaw testing as well as crack and fissure development on the treated wastes after 6 months of storage; (5) treatment results in a volume increase of 0 to 59 percent (22 percent average) and a bulk density increase of 25 to 41 percent (a quantity of cement, reagent, additives and water approximately the weight of the waste was added during treatment); and (6) the process is economical.