Stationary Reciprocating Internal Combustion
Engines (RICE):
virtual tour
Introduction
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 EPA
identified 26,832 engines located at commercial, industrial,
and government facilities based on information contained in the
EPA Inventory Database V.4—Internal Combustion (IC) Engines
(referred to as the Inventory Database). From this initial population
of 26,832 engines, there were 10,118 engines that were excluded
from further analysis because they were either less than 500 hp
or used to supply emergency/backup power or both. These engines
are not covered by the proposed regulation. Of the 16,714 remaining
engines in the Inventory Database that are potentially affected
by the rule, 2,645 units had sufficient information to assign model
numbers (e.g., fuel type, engine configuration, horsepower). These
2,645 units were linked to 834 existing facilities. These engines
are primarily in either the oil and gas extraction  industry or
the natural gas transmission industry.
EPA anticipates that about 60 percent of existing and future stationary
RICE units are currently or will be located at area sources. This
is because most RICE engines or groups of RICE engines are not
major HAP emission sources by themselves, but may be major because
they are co-located at major HAP sites.
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