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REMEDIATION TECHNOLOGY EVALUATION AT THE GILT EDGE MINE, SOUTH DAKOTA
Citation:
TRUDNOWKI, J. REMEDIATION TECHNOLOGY EVALUATION AT THE GILT EDGE MINE, SOUTH DAKOTA. U.S. Environmental Protection Agency, Washington, DC, EPA/600/R-05/002 (NTIS PB2005 102499), 2005.
Impact/Purpose:
to present information
Description:
This document reports the findings of the Mine Waste Technology Program's Activity III, Project 29,The Remediation Technology Evaluation Project at the Gilt Edge Mine, S.D. This project consisted of evaluating three emerging acidic waste rock stabilization technologies and comparing those technologies to lime treatment of acidic waste rock. The three new technologies tested were the Silica Micro Encapsulation (SME) Technology from Klean Earth Environmental Company (KEECO), the Passivation Technology from the University of Nevada-Reno (UNR) and the Envirobond Technology from Metals Treatment Technologies. Performance of the technologies were evaluated as a pilot-scale demonstration by placing treated waste rock into isolated celles at the Gilt Edge Mine and monitoring the leachate collected from the representative cells. The objective of the treatments was to reduce the contaminants of concern by at least 90% or to South Dakota water discharge limits. The three technology vendors also provided a cost estimate to treat a hypothethical 500,000 cu yd waste rock pile at the Gilt Edge Mine using the pilot scale data as a guideline. The leachate results revealed that UNR's Passivation technology and the lime treatment reduced more contaminants of concern to the project objectives than the KEECO and MT2 technologies.