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Engine Test Cells/Stands: National Emission Standards for Hazardous Air Pollutants (NESHAP)

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Rule Summary

On May 27, 2003 EPA published the final national emission standards for hazardous air pollutants (NESHAP) for engine test cells/stands. Engine test cells/stands are used in a variety of applications to develop, characterize and test engines. 

Hazardous air pollutants (HAP), also known as air toxics, are those pollutants known or suspected to cause cancer or other serious health effects. Engine test cell/stands emit air toxics in the exhaust gases from combustion of gaseous and liquid fuels in the engines being tested in the test cells/stands. The primary air toxics present are toluene, benzene, mixed xylenes, and 1,3- butadiene. The health effects associated with exposure to these compounds can include cancer, respiratory irritation, and damage to the nervous system.

Rule History

06/03/2020 - Final Amendments

05/08/2019 - Proposed Amendments

08/28/2003 – Federal Register Correction

05/27/2003 – Final Rule

05/14/2002 – Proposed Rule

Additional Resources

Fact Sheet:  Final Amendments to Air Toxics Standards for Engine Test Cells/Stands Risk and Technology Review

Fact Sheet: Proposed Amendments to Air Toxics Standards for Engine Test Cells/Stands

Draft Engine Test Cell Facility List in Excel (September 2016)(3 pp, 339 K, September 21, 2016)

Fact Sheet: Final Rule to Reduce Toxic Air Emissions from Engine Test Cells/Stands

View the supporting documents in the docket folder to find additional related documents to this rule.

Related Rules

Beryllium Rocket Motor Firing: National Emission Standards for Hazardous Air Pollutants (NESHAP)