Recipients: Larry G. Twidwell, Jay Walter McCloskey, Michelle G. Lee and Jennifer Saran

Paper: “Arsenic Removal from Mine and Process Waters by Lime/Phosphate Precipitation” and “Arsenic Removal from Mine and Process Waters by Lime/Phosphate Precipitation: Pilot Scale Demonstration” published in Arsenic Metallurgy

Larry G. Twidwell is the Anaconda Distinguished Professor in the Metallurgical and Materials Engineering Department at Montana Tech, where he has worked for 36 years.

Dr. Twidwell has conducted research emphasizing extractive metallurgy and the application of engineering principles to the treatment of industry wastes and by-products

Jay Walter McCloskey is a senior projects engineer for MSE Technology Applications Inc. in Montana.

At MSE, McCloskey helped to develop the Environmental Protection Agency’s Mine Waste Technology Program; he is currently the program’s arsenic projects manager. He earned his master’s degree from Montana Tech.

Michelle G. Lee works at MSE Technology Applications Inc. in Montana.

Jennifer Saran is an environmental engineer with Kennecott Greens Creek Mining Company in Arkansas.

She earned her master’s degree at Montana Tech.