Regional Technical Operations Work Group

Agricultural Field Dust, Eastern California Fire Event, San Jacinto Class I Wilderness Area, California Bay Bridge, San Francisco, California Denali National Park Class I Area, Alaska Salt Lake City Skyline, Utah
Regional Technical Operations Work Group

  • Regional analyses in support of planning activities related to emissions and modeling for regional haze, ozone, PM, and other indicators.
  • Evaluation of background and regional transport, international transport, sensitivity and other analyses of emissions data focused on the western U.S.
  • Perform and leverage modeling, data analysis, and contribution assessment studies.
  • Investigation of “background ozone” impacts to western U.S. locations.
  • Coordination and collaboration with other WRAP member-sponsored regional air quality modeling groups including IWDW, NW-AIRQUEST, EPA-OAQPS, BAAQMD, and otherstate and local agencies performing regional ozone modeling.
  • Provide guidance on more complete and uniform model performance evaluations (MPEs).
  • Develop and implement a protocol to use the IWDW-WAQS capabilities as the WRAP Regional Technical Center.
Documents (final and draft as noted)

Nov. 22, 2021 final RTOWG Workplan Scope

Nov. 29, 2021 RTOWG Membership List

Nov. 2, 2021 draft RTOWG Workplan Scope

Procedures for Making Visibility Projections and Adjusting Glidepaths using the WRAP-WAQS 2014 Modeling Platform (March 1, 2021, final draft)

December 2020 Regional Haze Modeling Plan Schedule update (PDF) (current, updates as needed)

November 2020 Modeling Scenarios summary table update (PDF) (final)

WRAP/WAQS2014/2028 Regional Haze Modeling Run Specification Sheets (October 2020 update, final)

Sources of emissions sector data for the WRAP RepBase2 and 2028OTBa2 modeling scenarios (September 2020, final)


February 16, 2022 RTOWG Meeting using Teams

VOC and ozone measurements in Tucson, AZ, Richard Pepel and Eric Betterton, U. Arizona
MEGAN3 emission factors, stress responses, and urban emissions, Alex Guenther, UC-Irvine
Description and preliminary evaluation of BELD 6 and BEIS 4, Jesse Bash, EPA
OAQPS’ plan for using BELD6/BEIS4 in the 2020NEI, Jeff Vukovich, EPA

Recording (MP4format)

December 14, 2021 RTOWG and IWDW-WAQS Technical Committee Meeting using Teams

Meeting materials

Recording (MP4format)

November 2, 2021 RTOWG Meeting using Teams (Scope and List final versions after WG review during Nov.)

Nov. 29, 2021 final RTOWG Workplan Scope

Nov. 29, 2021 RTOWG Membership List

March 2, 2021 Teams Meeting

Agenda (notes) (recording – MP4 format) December 16, 2020 Teams Meeting

Agenda (notes) July 15, 2020 call and web meeting recording (MP4)
  1. Welcome, Agenda Review, Roll Call – RTOWG Co-Chairs
  2. Review updates to postings at: - Tom
  3. Ramboll presentation topics:
    1. 2028 projection emissions changes and corrections / state review of point sources by July 21st / resulting modeling schedule – Tejas Shah and Ralph Morris
      1. Review Directions (DOCX)
      2. Data Review file (XLSX)
      3. Example FF10 file (CSV)
    2. Review of alternate visibility projection methods - Ralph
    3. PAC1 visibility modeling results - Ralph
  4. Topics for July 23 and 30 Results meetings - Tom
  5. Next steps / action items /next RTOWG call – Co-Chairs
April 29, 2020 call and web meeting

Agenda (notes) March 31, 2020 call

Agenda (notes)
  • Welcome, Roll Call, Agenda Review – Mike, Gail, Kevin
  • Ramboll presentation (PDF)
    • 2028OTBb (future year 'on the books' with 2014v2 fires) results applied to calculate reasonable progress goals
    • Weighted Emissions Potential / Area of Influence (WEP / AOI) results and delivery via browser
    • Review spec sheet for 2028OTBb PSAT and APCA – source categories and regions
  • March 2020 Regional Haze Modeling Plan update – Tom
  • Plans for upcoming RTOWG calls - Mike
March 12, 2020 National Oil & Gas Emissions Committee call – presentation by Brian Timin: EPA 2028 Regional Haze Modeling - Modeled Oil & Gas Impacts

March 12, 2020 call (Agenda) (notes)

Ramboll modeling progress presentation

White Paper -
Potential Procedures for Making 2028 Visibility Projections using the WRAP 2014 Modeling Platform

February 26, 2020 call (Agenda) (notes)

Modeling Progress Report (PDF)

January 22, 2020 Notes

  1. Welcome/agenda review/roll call/notetaking – Mike, Gail, Kevin
  2. Model performance evaluation of CAMx 2014v2 presentation - Ralph Morris (Ramboll) (PDF)
  3. “2014v2 to representative baseline” emissions changes by sector by state, including showing the grid cell state definitions,and EGU unit level “2014v2 to representative baseline” emissions changes in the WRAP region specifically – presentation and spreadsheet review - Tejas Shah (Ramboll) (PPT)
  4. Review spec sheet for upcoming: representative baseline source apportionment run - Ralph Morris (Ramboll) (DOC)
  5. Next RTOWG call (date/time and agenda items) – Mike, Gail, Kevin
November 19, 2019 Call Notes

Agenda Sept. 10, 2019 call

  1. Welcome / Roll Call / Note-taking / Agenda Review – Mike / Kevin / Gail
  2. Review of modeling deliverables and updated schedule – next ~2 months – Ralph (PPT)
  3. White Paper on International Contributions / Boundary Conditions – Mike (PPT)
  4. 2028 Modeling Scenarios – Tom (PDF)
  5. Review agenda items and time/date of next call (Oct. 15th)

August 6, 2019 Call Agenda/Notes

Alaska Visibility Analysis presentation (PPTX)


August 2019 Regional Haze Modeling Plan update (PDF)

Western Modeling Domains (PNG)

Regional Haze Modeling Scenarios – June 20, 2019 (XLSX)

Materials from RTOWG / IWDW-WAQS 2014v1 Shakeout Modeling Platform Results meeting
Friday, April 5, 2019 9:00 AM to 4:30 PM MDT, Denver

Shakeout Deliverables and EPRI International Haze Study (Ralph)

Sensitivity Modeling Comparison Results (Ramboll)
  • Meteorology
  • Biogenics
  • Boundary Conditions

Emissions Processing Results
Air Quality Modeling Results - Model Performance Evaluation (Marco)

IWDW / TSSv2 Ingestion and Data Displays for Shakeout Platform (Shawn)

Modeling Plan and Recommendations (Ralph)

Next Steps and v2 work assignment (Tom)

February 12, 2019 Call Agenda and Notes

Uniform Rate of Progress Adjustment presentation (PPT)

Shakeout Modeling Platform progress report (PPT)

WRAP Workplan – RTOWG Appendix E draft for review (DOC)

August 16, 2018 Notes (PDF)

Fiore presentation (PDF)

Neu presentation (PDF)

Modeling Representativeness Analysis Project

Draft SoW for Analysis of inter-annual variability of meteorology, emissions, and air quality observations in the western US to assess representativeness for regional modeling and air quality planning (Jan. 12, 2018)

Project call #1 – Feb. 9, 2018 Project call #2 – Feb. 22, 2018 (MP4 recording)

Project call #3 – March 15, 2018 (MP4 recording)

Data Review OneNote notebook link. Click to review and comment on data

Project call #4 – April 5, 2018 (MP4 recording)

Project call #5 – April 19, 2018 (MP4 recording) (Ramboll presentation) (PMF analysis report) (PMF analysis appendix)

Final Report (PDF)

Data Displays for Final Report (PDF)

TSC-WGs-Subcommittee Membership (XLS, May 16, 2018)

Reference Material