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WASHINGTUN, DC: 20510 

### May 22, 2014 The Honorable Gina McCarthy Administrator Environmental Protection Agency U.S. EPA IIcadquarters — Williarn J. Clinton Building 1200 Pennsylvania Avenue, NW Washington, DC 20460 Dear Administrator McCarthy, We are writing to request that the Environmental Protection Agency (EPA) provide at least a 120 day comment period on the upcoming draft proposal for the regulation of greenhouse gases from existing power plants. The EPA should provide this extended comment period as soon as the proposed rule is noticed in the federal register, given the significant impact this rule could have on our nation's electricity providers and consumers, on jobs in communities that have existing coal-based power plants, and on the economy as a whole. 1'lie upcotnitlg proposal will be far more cornplex and critical 1or the industry to deal with than the proposal for new plants, and stakeholders will need time to analyze the rule and detet-mine its impact on individual power plants, reliability and consumer cost, and on the electric system as a whole. 7'his analysis will be no small undertaking, as this will be the first evet • regulation of greenhouse gases from existing power plants. E 1'A recognized that additional time was needed and extended the original 60 day cornment period for the Agency's proposal regarding new source perforniance standards for newly constnicted power plants, so it only makes sensc to provide at least the same timeline from the outset for the existing plant rule. Affordable, reliable, and redundant sources of'electricity are essential to the econornic well-being ot' our states and the quality of life of our constituents. While we a11 agree that clean air is vitally important, EPA lias an obligation to understand the impacts that regulatians have oti all segments of society. As one step toward fitlfillint; this obligation, we urge you to provide for a comment period of at least 120 days on the forthcoming performance standards for existing eoal-based power plants. Thank you for your consideration ofthis request.



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# WD& L-0 Deb N ischer United States Senator Sincerely,
I-Ieidi Heitkamp United Statcs Senator

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