Proposed Gold Ore Processing NESHAP

“EPA is proposing to add the gold mine ore processing and production area source category to the list of source categories subject to regulation under the hazardous air pollutant section of the Clean Air Act (CAA) due to their mercury emissions. EPA is also proposing national mercury emission standards for this category based on the emissions level of the best performing facilities which are well controlled for mercury.”


“The gold mine ore processing and production area source category consists of facilities engaged in processing gold ore to recover gold using one or more of the following process units: roasters, autoclaves, carbon kilns, melt furnaces, mercury retorts, electrowinning, and/or pregnant solution tanks. There were approximately 21 gold mine ore processing and production facilities operating these processes in the United States (U.S.) in 2008. The majority and the largest of these facilities are located in Nevada. The other facilities currently operating are in Alaska, California, Colorado, Montana, and Washington.”

Notice:
http://companyweb/General%20Documents/Docs%20for%20posting/Gold%20Ore%20Processing%20NESHAP/NESHAP%20proposal%20-%20Au%20ore%20processing.pdf

MACT development:
http://companyweb/General%20Documents/Docs%20for%20posting/Gold%20Ore%20Processing%20NESHAP/MACT%20development%20-%20Au%20ore%20processing%20NESHAP.pdf

Mercury emissions evaluation report:
http://companyweb/General%20Documents/Docs%20for%20posting/Gold%20Ore%20Processing%20NESHAP/Hg%20emissions%20eval%20-%20Au%20ore%20processing%20NESHAP.pdf

Mercury emissions factors:
http://companyweb/General%20Documents/Docs%20for%20posting/Gold%20Ore%20Processing%20NESHAP/Hg%20Em%20Fctrs%20-%20Au%20ore%20processing.pdf