Public Hearing on Ozone Rule Changes in Colorado

Colorado Air Control Commission Announces Public Hearing Regarding Ozone Rule Changes

On September 10, 2016 the Colorado Air Control Commission announced that it will hold a hearing on the proposal to modify ozone rule changes in Regulation Number 7 titled “Control of Ozone Via Ozone Precursors and Control of Hydrocarbons Via Oil and Gas Emissions,” specifically 5 CCR 1001-9.

The hearing is scheduled for 11/17/2016 at 9:00 AM at the Colorado Department of Public Health and Environment (4300 Cherry Creek Drive South, Sabin Conference Room, Denver, CO 80246).


The changes proposed are associated with Colorado’s moderate ozone non-attainment classification under the Clean Air Act and separate revisions to address EPA concerns with previous SIP rule language submittals. The proposed revisions are as follows:

  1. Incorporation of State-only requirements for combustion device auto-igniters into Colorado’s federal Clean Air Act State Implementation Plan (SIP);
  2. Establish condensate storage tank audio, visual, and olifactory inspection;
  3. Establish Reasonably Available Control Technology (RACT) requirements for both printing operations and general industrial cleaning solvent use;
  4. Provide for the implementation of RACT for major sources of VOC and NOx;
  5. Establish RACT for combustion sources; and
  6. Adjust the applicability of Regulation Number 7 accordingly.

The proposed revisions also address EPA’s concerns with Colorado’s previous SIP submissions that

  1. Establish monitoring, recordkeeping and reporting requirements for glycol natural gas dehydrators and natural gas processing plants;
  2. Remove references to EPA approval of emission factors; and
  3. Renumber, revise or revert to previously typographical, grammatical and formatting changes.

Sources :

Colorado Air Control Commission Announces Public Hearing Regarding Ozone Rule Changes, 39 Colorado Register 17 (2016). 


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