The Environmental Protection Agency agreed July 20 to reconsider the mercury and air toxics standards it set for new power plants. The Institute of Clean Air Companies, the International Brotherhood of Boilermakers, and others have asked the agency to reconsider mercury limits for new sources because current technology cannot continuously monitor mercury concentrations so low. The agency will not reconsider aspects of the rule pertaining to existing power plants. Deferring emissions standards for three months, the agency will make a final determination by next March.