Stationary Combustion Turbines: National Emission Standards for Hazardous Air Pollutants (NESHAP)

On this page:

• Rule Summary
• Rule History
• Additional Resources

Rule Summary

This action promulgates national emission standards for hazardous air pollutants (NESHAP) for stationary combustion turbines. We have identified stationary combustion turbines as major sources of hazardous air pollutants (HAP) emissions such as formaldehyde, toluene, benzene, and acetaldehyde. The NESHAP will implement section 112(d) of the Clean Air Act (CAA) by requiring all major sources to meet HAP emission standards reflecting the application of the maximum achievable control technology (MACT) for combustion. 

Rule History

04/11/2024 -  Final Action: Denial of Petition to Delist

03/09/2022 - Final Amendments to Remove a Stay

03/09/2020 - Final Rule 

04/12/2019 - Proposed Rule

08/18/2004 – Final Rule; stay

04/07/2004 – Proposed Rule & Proposed Rule

03/05/2004 – Final Rule

01/14/2003 – Proposed Rule

Additional Resources

Fact Sheet: Final Action to Deny Petition to Delist the Stationary Combustion Turbines Source Category (pdf) (166.5 KB)

Updated List of Stationary Combustion Turbines Subject to the Stationary Combustion Turbine NESHAP – August 2024 (xlsx) (xlsx) (456.08 KB)

Fact Sheet: Final Amendments to Air Toxics Standards for Stationary Combustion Turbines to Remove a Stay of the Formaldehyde Standards in Two Subcategories (pdf) (136.47 KB)

Petition for Reconsideration of the March 2020 Residual Risk and Technology Review Final Rule

Letter Granting the Petition for Reconsideration of the March 2020 Residual Risk and Technology Review Final Rule

Residual Risk and Technology Review Final Rule January 2020: Fact Sheet

Residual Risk and Technology Review Proposal April 2019: Turbines HEM Input Files (zip)

Residual Risk and Technology Review Proposal April 2019: Fact Sheet

Final Rule to Reduce Hazardous Air Emissions from Newly Built Stationary Combustion Turbines: Fact Sheet

Response to Public Comments on Proposed Stationary Combustion Turbines NESHAP with Revision

Economic Impact Analysis of the Final Stationary Combustion Turbines NESHAP: Final Report

View the supporting documents in the docket folder for the 2004 rule to find additional related documents to the rule.

Section 114 Information Request Documents

Survey Test Reports Part 1 (zip)

Survey Test Reports Part 2 (zip)

Revised Test Report for Sunshine Gas Producers (zip)

Additional Acid Gas Test Data for BMW Manufacturing (zip)

Additional Acid Gas Test Data from Industry - August 2024 (zip)

Survey ERT Files Part 1 (zip)

Survey ERT Files Part 2 (zip)

Survey ERT Files Part 3 (zip)

Part 1 Survey ( Turbine Process and APCD Information Survey (xlsx) (51.32 KB, 4/5/2022) )

Part 1 Survey Instructions Document ( Instructions for Process and APCD Information Survey Spreadsheet (pdf) (175.4 KB, 4/5/2022) )

Required ERT Fields ( Required Data Entry Fields for ERT Turbines (xlsx) (24.89 KB, 4/5/2022) )

Testing Supplement ( Turbines Test Supplement (xlsx) (239.85 KB, 4/5/2022) )

Example Cover Letter ( Turbines Section 114 Example Letter (pdf) (175.29 KB, 4/5/2022) )

Related Rules

Stationary Gas and Combustion Turbines: New Source Performance Standards (NSPS) - 40 CFR 60 Subparts GG & KKKK

Alternative Control Techniques Document: NOx Emissions from Stationary Gas Turbines