MSE Technology Applications Inc, P.O. Box 4078, Butte, Montana 59702

A -- DEVELOPMENT OF A PASSIVE TECHNOLOGY FOR IRON & MANGANESE REMOVAL SOL A72134 DUE 031999 POC Charles E. Ries, Sr. Subcontract Administrator, (406) 494-7188 This is a Request for Information to determine the availability of passive technologies to remove manganese and iron from acid mine drainage. The technology will provide long-term, passive treatment of iron- and manganese-containing waters discharging from abandoned, hard-rock mines in remote locations. Because of the remoteness of the application locations, the technology will require little maintenance and operation attention. The technology will be able to function over a wide range of temperatures (-40 to +80 degrees F). The flow rate of the water to be treated will be approximately 10 gallons per minute with a pH of 5 to 7. Iron and manganese concentrations will be approximately 40 parts per million (ppm) and 15 ppm respectively. Other metal contaminants in the water will be removed prior to being treated by the requested technology; however, minor concentrations of other metals may still be present in the water. Those proposing technologies will be required to identify and provide a passive technology meeting the specific project requirements. Interested parties should submit information including the state of developement of the proposed technology plus analytical data and flowrates from completed projects. A Request for Proposal for laboratory and field testing of a technology will be issued at a future date if this Request for Information indicates that sufficient technologies exist. Posted 03/02/99 (W-SN303772). (0061)

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