FILE- In this Dec. 15, 2010 file photo, Jim Riggio, the plant manager for the Beaver Falls Municipal Authority, shows the filtering rig that the treatment plant used to develop improvements in the ... more 
FILE- In this Dec. 15, 2010 file photo, Jim Riggio, the plant manager for the Beaver Falls Municipal Authority, shows the filtering rig that the treatment plant used to develop improvements in the treatment of the water at the intake facility in Beaver Falls, Pa.. On Tuesday, Jan. 4, 2011, Pennsylvania Department of Environmental Protection Secretary John Hanger defended Pennsylvania's state regulatory efforts to monitor wastewater produced by the natural gas industry. less 
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Associated Press | Photo By Keith Srakocic, File
Wed, Jan 5, 2011 3:45 AM EST