EPA Details New Stationary Engine Regs

Posted on May 26, 2006

The U.S. Environmental Protection Agency (EPA) has announced details on its previously announced proposed a rule to regulate exhaust emissions from stationary internal combustion engines. EPA says these engines are used at facilities such as power plants and chemical and manufacturing plants to generate electricity, power pumps and compressors. They are also used in emergencies to produce electricity and pump water for flood and fire control.

The regulations are part of a consent decree with Environmental Defense, which requires the EPA Administrator to complete a final rule by December 20, 2007.

The proposed standards are in two parts. These two sets of regulations are being proposed under one notice of proposed rulemaking because the industries being addressed are practically identical, EPA said.

The first part, known as New Source Performance Standards (NSPS), would limit emissions of nitrogen oxides (NOx), carbon monoxide (CO), and non-methane hydrocarbons (NMHC) from new stationary spark ignition internal combustion engines.

A new stationary spark ignition engine is one that is manufactured or ordered after the date this proposal is published in the Federal Register and manufactured after July 1, 2007, for engines greater than or equal to 500 horsepower, and after January 1, 2008, for engines less than 500 hp. Stationary spark ignition engines that are modified or rebuilt after those dates also are subject to the rule.

The second part, known as a technology-based the air toxics standard, would limit air toxics emissions from existing, new and reconstructed stationary reciprocating internal combustion engines that are located at area sources of air toxics emissions or that have a site rating of less than or equal to 500 hp and are located at major sources of air toxics emissions.

Owners/operators have several options to demonstrate compliance with the proposed rule. For the most part, owners/operators would purchase an engine certified for stationary use by the manufacturer. The proposal would also require owners/operators to operate and maintain the engine according to the manufacturer’s instructions. If a non-certified engine is purchased, the owners or operators would need to perform emission testing to demonstrate compliance, EPA said.

The proposed rule can be found at: http://www.epa.gov/ttn/oarpg/t3pfpr.html.