WASHINGTON (CN) - The Environmental Protection Agency is reconsidering national emission standards for hazardous air pollutants for nine chemical manufacturers.
The agency seeks comment on several provisions of an Oct. 29, 2009 final rule it is reconsidering.
The EPA also proposes revisions to its approach for addressing malfunctions and asks for comments on those revisions and on the standards applicable during startup and shutdown periods, as described in the final rule.
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