Both USEPA and NHDES define emergency operation of stationary engines based on the type and amount of operation of the device. As these definitions are slightly different, NHDES has prepared the following streamlined definition of an emergency engine that meets both regulations.
An emergency engine is a stationary internal combustion engine used for emergency purposes that is limited to 500 hours of total operation during any consecutive 12-month period. This includes:
- Operation during emergency situations. Examples include engines used to produce power when electric power from the normal power source is interrupted or engines used to pump water in the case of fire or flood, etc.; and
- Operation for 100 hours per calendar year for any combination of maintenance checks and readiness testing and Emergency Demand Response.
Emergency engines shall not operate as a load-shaving or peaking power production unit.
- Guidance on Stationary vs. Nonroad Engines
- Emergency Demand Response
- Frequently Asked Questions About New Hampshire's Air Permit Program
- National Emission Standard for Hazardous Air Pollutants (Quad Z)
- Standards of Performance for Stationary Compression Ignition Internal Combustion Engines (Quad I)
- Standards of Performance for Stationary Spark Ignition Internal Combusion Engines (Quad J)
- NHDES Presentation: General State Permit Update 2015
- NHDES Presentation: Air Regulations Pertaining to Emergency Generators located at Area Sources (Updated 2015)
- USEPA Presentation: EPA’s Air Quality Regulations for Stationary Engines (Melanie King, May, 2013)
- EPA Regulation Navigation Tool for Quad I and J
- EPA Regulation Navigation Tool for Quad Z
- Combustion Portal
- Air Emissions: General State Permit for Internal Combustion Engines Used as Emergency Generators
- Air Emissions: State Permit to Operate
- Air Emissions: Temporary Permit
- Air Emissions: Title V Operating Permit
- Guidance on RICE NESHAP Residential-Institutional-Commercial Emergency Engine Definition
- NAICS Code Look Up
- Air Permitting Program
29 Hazen Drive; PO Box 95
Concord, NH 03302-0095
(603) 271-1381 (fax)
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