Emergency Generators and Neshap Subpart ZZZZ

Aug_blog__Generator (1)

In January of this year, the US EPA signed the final revision to the air pollution legislation known as RICE NESHAP.  RICE stands for Reciprocating Internal Combustion Engines, while NESHAP is a set of rules to reduce Emissions of Hazardous Air Pollutants.  Subpart ZZZZ, or 4Z, defines an emergency generator as one that is used solely for emergency purposes, runs fewer than 100 hours per year for non-emergency use including maintenance, and is not used for peak shaving or to sell power to the grid.  Hours of emergency use is not limited, and the regulation only applies to generators in industrial settings, not residential units.  If your generator fits this description, then:

You must:

  • Have a non-resettable hour meter;
  • Keep a log of usage and maintenance;
  • Change the oil and filter every 500 hours or annually, whichever comes first;
  • Check the air filter every 1,000 hours or annually, whichever comes first; and,
  • Check belts and hoses every 500 hours or annually, whichever comes first.

The requirements for non-emergency generators are a little more stringent.  For more information on RICE, go to the US EPA website at http://www.epa.gov/ttnatw01/rice/ricepg.html.