1. DOGM Collaborative Meeting
Uinta Basin Ozone Status
Tri-County Health Board Meeting
Air Quality Update
DOGM Collaborative Meeting
October 11, 2018

2. Quick Background for Ozone
Ozone formed by reaction of NOx and VOCs in the presence of sunlight
Emissions of these precursors primarily from oil and gas sources in the Basin
Winter conditions of clear skies and snowcover create strong inversions and high levels of ozone
October 2015 National Ambient Air Quality Standard (NAAQS) for ozone lowered from 75 ppb to 70 ppb
Evaluation of air quality data and several other factors have led to official designation of the Uinta Basin as a marginal nonattainment area for ozone
Boundary of designation is all areas below the contiguous elevation perimeter of 6,250 ft
This was effective as of August 3, 2018

3. Ozone Nonattainment Area

4. Marginal Nonattainment Designation Requirements
Nonattainment New Source Review is applicable within one year of designation
Requires new major sources with PTE of 100 tons per year (tpy) of NOx or VOCs , or existing sources with an increase of 40 tpy of NOx or VOCs, to meet lowest achievable emissions rate (LAER) and obtain emission reduction offsets from elsewhere within the nonattainment area at a ratio of 1 to 1.1
General Conformity applies within one year of designation
Federal projects cannot cause or contribute to a NAAQS violation, increase the frequency or severity of any existing NAAQS violation or delay timely attainment of NAAQS or emission reduction goal
Transportation Conformity only applies in areas with populations greater than 200,000 so not applicable to the Uinta Basin
Emissions Inventory required within one year of designation date that includes all emission sources within the nonattainment area for a specific base year
Marginal Nonattainment Area must achieve attainment of the standard within three years, so by August 3, 2021

5. Design Value
To achieve attainment the air quality data for the Uinta Basin must achieve design value of 70 ppb or less
Design value is determined by the three year average of the 4th highest 8-hour average ozone value measured at a monitor
Attainment will be evaluated on the air quality data from calendar years 2018 to 2020

7. Uinta Basin Ozone Work Group
Stakeholder group with representation from industry, local government, environmental advocates, academics, state and federal agencies
Goal of group is through collaboration and shared knowledge to identify
Effective, economically viable measures to reduce ozone levels in the Uinta Basin
Policies, public information, educational resources, and beneficial actions to support ozone level reductions

8. New Oil and Gas Rules
The new series of oil and gas rules (R to 509) were in effect as of March 2018
Required existing oil and gas sources on State land to register with UDAQ by July 1, 2018
To date 2,223 sources registered, DOGM data shows 2,859 producing oil and gas wells so about 78% of sources are registered

9. New Oil and Gas Rules
Currently have Associated Gas Flaring Rule out for public comment – R (Oct 1-30)
Rule supplements ability for sources to utilize the Permit-by-Rule option rather than applying for a permit
Rule requires well sites to control or flare associated gas with production rather than venting

10. Oil and Gas Inventory

11. Oil and Gas Inventory

12. Oil and Gas Inventory

13. Oil and Gas Inventory

14. The Path Forward
Completing the 2017 Oil and Gas Inventory as this will most likely be the baseline for future milestones as a nonattainment area
Support the Uinta Basin Ozone Working Group in understanding the issues and possible volunteer actions to lower the design value over the next 3 years
Continue to evaluate new oil and gas rules and communicate requirements to industry and stake holder to ensure compliance
Composition study to better understand emissions and modeling
Work with EPA and Tribe to coordinate and support consistent oil and gas regulatory requirements

15. Questions?/Discussion
Ozone information and Air Quality Information
Ozone SIP Coordinator for Uinta Basin
Sheila Vance