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Reconsideration of Final National Emission Standards for Hazardous Air Pollutants for Reciprocating Internal Combustion Engines

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Regulatory Report Card

EPA is proposing amendments to national emission standards for hazardous air pollutants for stationary reciprocating internal combustion engines under section 112 of the Clean Air Act. Proposed amendments include alternative testing options for certain large spark ignition stationary reciprocating internal combustion engines, management practices for a subset of existing spark ignition stationary reciprocating internal combustion engines in sparsely populated areas, and alternative monitoring and compliance options for the same engines in populated areas. EPA also proposes to include a limited temporary allowance for existing stationary emergency area source engines to be used for peak shaving and non-emergency demand response. EPA also proposes to increase hours that stationary emergency engines may be used for emergency demand response. Proposed amendments also correct minor mistakes in the preexisting regulations.


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