Approval of Plan of the Commonwealth of Pennsylvania; Clean Air Mercury Rule

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EPA is proposing to approve a State Plan submitted by the Commonwealth of Pennsylvania (Pennsylvania) which addresses the requirements of EPA's Clean Air Mercury Rule (CAMR), which EPA promulgated on May 18, 2005 and subsequently revised on June 9, 2006. EPA is proposing to determine that the submitted State Plan fully implements the CAMR requirements for Pennsylvania. CAMR requires States to regulate emissions of mercury (Hg) from large coal-fired electric generating units (EGUs). CAMR establishes State budgets for annual EGU mercury emissions and requires States to submit State Plans that ensure that annual EGU mercury emissions will not exceed the applicable State budget. States have the flexibility to choose which control measures to adopt to achieve the budgets, including participating in the EPA-administered CAMR cap-and-trade program. Pennsylvania chose to adopt a State-specific plan for the control of mercury emissions from EGUs within the State instead of participating in the EPA-administered CAMR cap-and-trade program. Pennsylvania's plan includes a Pennsylvania-specific mercury control regulation for coal-fired EGUs and other elements which the State intends to implement