Superfund Innovative Technology Evaluation (SITE)
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This document is an evaluation of the HAZCON solidification technology and its applicability as an on-site treatment method for waste site cleanup.A Demonstration was held at the Douglassville, Pennsylvania Superfund site in the fall of 1987. Operational data and sampling and analysis information were carefully monitored and controlled to establish a data base against which other available data and the vendor's claims for the technology could be compared and evaluated. Conclusions were reached concerning the technology's suitability for use in clean up of the types of materials found at the test site, and extrapolations were made to cleanups of other materials. Site materials were sampled to characterize the site. Untreated feedstock materials were sampled to provide a base case against which to compare the product materials, and solidified materials were sampled after 7 days and after 28 days of curing. The samples were analyzed to determine physical properties such as unconfined compressive strength and permeability, chemical properties such as leachability, and microstructural characteristics. The results of these tests were then considered, along with those obtained by other investigators, and conclusions on the technology drawn from all the work. The conclusions drawn from the test results and other available data are that: (1) the process can solidify wastes high in organics; (2) the process does not immobilize volatile and semivolatile organics in most instances; (3) heavy metals are successfully immobilized; (4) a large volume increase can be expected where moisture content of the wastes is low; (5) the solidified material shows good structure with high unconfined compressive strengths and low permeabilities; (6) the microstructure indicates a potential for degradation over the long term; and (7) the process is economical.