Combustion Portal


Use this tool to determine the RICE NESHAP requirements for existing stationary, compression-ignited, diesel engine installations in the following categories:

  • Engines used at "area sources" of air toxics emissions and constructed or reconstructed before June 12, 2006,
  • Engines used at "major sources" of air toxics emissions, have a site rating of less than or equal to 500 hp, and constructed or reconstructed before June 12, 2006, and
  • Engines used at "major sources" of air toxics for non-emergency purposes, have a site rating of greater than 500 hp, and constructed or reconstructed before December 19, 2002.

Please note that emergency engines at residential, institutional, and commercial area sources are not subject to the RICE NESHAP.

For newer diesel engines not covered by this tool, see: Standards of Performance for Stationary Compression Ignition Internal Combustion Engines (40 CFR 60 Subpart IIII).

Engine Horsepower:
Total Hours of Operation: Hours/year
Hours of Emergency Operation: Hours/year
Hours of Maintenance and Testing Operation: Hours/year
Facility in which engine is located: (See definition)