UGRB Ozone Nonattainment Area Request for Redesignation - Public Input

Bad ozone seasons in UGRB have typically been associated with heavy snow winters.
Notice that Feb-March 2019 had 3 red days, while the wildlife-killing, 'inverted-snow' Feb-March of 2023 did not.
Hypothesis: NOx reductions between 2019 and 2023 ...↓may have made the difference.
Questions: How many tons NOx were reported by UGRB operators via the DEQ-required 2019 Winter EI ? How many via the 2023 Winter EI?

Thank you.



Attached tileplot from https://www.epa.gov/outdoor-air-quality-data/airdata-tile-plot
(orange is violation, red is big violation)↓

Hello,

A few comments with regards to the attainment redesignation:

- Engage industry early and often when developing the maintenance plan. Providing visibility into the agency's intended strategy for long term maintenance will reduce the number o...↓f comments received during public comments periods and help maintain trust with the regulated community.
- Increase communication on the benefits to industry about the benefits of redesignation.
- Industry is concerned that current voluntary programs, such as the EMA and OCP processes, will become codified and enforceable as part of the redesignation in alignment with EPA's focus on "Enforceable Reductions". Doing so will erode the trust that has allowed the agency and industry to work collaboratively on these programs. This collaboration has been key to the effectiveness of the voluntary programs. Strongly recommend providing transparency around expected regulation and compliance program changes to limit surprises to industry.

Thanks for all of your hard work improving air quality in the UGRB.

Adam Plonsky
Manager, Environmental
Enbridge↓