EPA is expected to finalize a rule that would cut air toxic pollution from power plants in Eastern states. The rule will come after missing the agency’s own deadline of Thursday. On the same day the Senate Environment and Public Works Committee will hold a hearing on the rule in question, which has been dubbed the “transport rule” as it tries to limit the spread of pollution from one state to another. Set to testify is Gina McCarthy, EPA’s assistant administrator for Office of Air and Radiation. Also on the agenda are the agency’s mercury standards for power plants – probably the most contentious after the GHG emissions standards.