Compliance dates for the National Emission Standard for Hazardous Air Pollutants (NESHAP) for Reciprocating Internal Combustion Engines (RICE), 40 CFR 63 Subpart ZZZZ, for existing sources are soon approaching. In 2010, EPA expanded the applicability of this rule to control hazardous air emissions not only from new engines but also existing engines, regardless of whether those engines are located at major source or area (minor) sources of HAPs. Types of engines covered include non-emergency engines used for power generation (including peak shaving), emergency backup power generators, and emergency fire pumps. Many of these engines are exempt from air quality permitting but are still subject to the RICE NESHAP. Diesel fueled engines have a compliance date of May 3, 2013, and natural gas and gasoline fueled engines have a compliance date of October 19, 2013. Key requirements of the RICE NESHAP include:
- Emissions control requirements for certain types of non-emergency engines.
- Operation and maintenance (O&M) and work practice requirements for emergency engines and certain types of non-emergency engines.
- Limits on non-emergency running hours for emergency engines.
- Record keeping requirements.