FILE - In this Nov. 4, 2010, file photo is Doe Run Co.'s lead smelter is seen in Herculaneum, Mo. The nation's largest lead producer plans to build a new plant in the eastern Missouri town and ... more 
FILE - In this Nov. 4, 2010, file photo is Doe Run Co.'s lead smelter is seen in Herculaneum, Mo. The nation's largest lead producer plans to build a new plant in the eastern Missouri town and promises it will be far more environmentally friendly than its existing smelter there that has been the subject of scorn by environmentalists and regulators for decades. less 
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Associated Press | Photo By Jim Suhr, File
Tue, May 17, 2011 1:42 PM EDT