Acid Rain NOX Emission Reduction Program-Permit Modifications for Alternative Emission Limitations

Under Title IV of the Clean Air Act, EPA established the Acid Rain NO<INF>X</INF> Emission Reduction Program to reduce the adverse effects of acidic deposition. EPA adopted nitrogen oxides ( NO<INF>X</INF>) emission limits and issued permits to affected sources. EPA is issuing and requesting public comment on draft Acid Rain permit modifications. These permit modifications add new NO<INF>X</INF> emission limitations (i.e., Alternative Emission Limitations for NO<INF>X</INF> emissions for Phase I units in accordance with the Acid Rain Program regulations) to the permits. The Alternative Emission Limitations are less stringent than the standard limit for these type of units but are the minimum rate that the units can achieve during long-term dispatch operation with low NO<INF>X</INF> burners.