Final Rules RCSA-22a-174-22e and RCSA-22a-174-22f are Effective!



On December 22, 2016, the Connecticut Department of Energy and Environmental Protection (CTDEEP) published final amendments to the Regulations of Connecticut State Agencies (RCSA) by adding two new sections:  22a-174-22e "Control of nitrogen oxides emissions from fuel-burning equipment at major stationary sources of nitrogen oxides" and RCSA Section 22a-174-22f "High daily NOx emitting units at non-major sources of NOx".  The new sections update the nitrogen oxide (NOx) emission requirements for fuel-burning equipment in order to satisfy reasonably available control technology requirements for NOX emissions limits under the 2008 ozone national ambient air quality standard.

A short summary of the updates are as follows:

  • Repealed regulations under RCSA 22a-174-22 to separate and revise NOx emissions limits and requirements applicable to short-term high-emitting equipment and equipment at major sources effective on June 1, 2018.  It is noted that RCSA section 22a-174-22 will apply while you are preparing for initial compliance with Phase 1 of new section 22a-174-22e.
  • RCSA 22a-174-22e now establishes NOx emission limits for boilers, turbines and engines located at major sources specific to each type of equipment and fuel type.
    • The rule now provides alternative compliance options; establishes an application for alternative limits; and sets forth monitoring, testing, recordkeeping and reporting requirements.
  • RCSA 22a-174-22f requires owners of equipment at non-major sources of NOx to maintain equipment in operating condition, to track daily emissions during the summer months and to reduce the rate of emissions if the equipment exceeds specified daily levels.

The final approved regulation can be viewed here.