Thanks - if you are using BAC then couldn't your newer plant benefit from MEECs additives or Advanced Emissions (ADES) M-Prove. These companies claim their additives are cheaper than the activated carbon. And thanks again for your help.
this came out friday; I googled "DC mercury regulations"
EPA proposes supplemental finding about MATS and costs
November 20, 2015 – After assessing costs in several different ways, EPA is proposing to find that considering costs does not alter the determination that it is appropriate to regulate the emissions of toxic air pollution from power plants. EPA is proposing this supplemental finding in response to a decision by the U.S. Supreme Court.