Regional Haze Planning Work Group

Volcanic Ash Event Hawaii Wilson Fire, California Old Faithful Geyser, Yellowstone National Park, Class I Area, Wyoming Yosemite National Park Class I Area, California The Falls, Sioux Falls, South Dakota
Regional Haze Planning Work Group

November 19, 2021 draft RHPWG Workplan Scope


The purpose of the WRAP Regional Haze Planning Work Group (RHPWG) is to prepare the framework to support regional planning for the 15 western states, so that needed elements will be available for RH SIP submissions in a timely fashion, to meet the July 2021 deadline for implementation plans to be submitted each of the 15 states and the City of Albuquerque within the WESTAR and WRAP region, for the second planning period of the federal Regional Haze Rule for visibility protection at 118 Class I areas. This includes a training element for new Regional Haze State Implementation Plan (RHSIP) writers, as evidenced by the webinars and resource links found on this webpage.

The RHPWG formed several topical subcommittees from among its members to coordinate and track work by other WRAP Work Groups and contractors, to address elements needed for State Implementation Plan preparation such as:
  • Inventories: current and future (growth projections methodologies by source categories)
  • Develop a transparent and complete monitoring data metric for planning and model projection purposes
  • Database management (including the TSS database)
  • 4-factor analysis for control measures
  • Regional photochemical modeling
  • Assessment of “unknowns” and uncertain categories (natural conditions, international emissions, fire and dust emission, et cetera)
  • Development of Regional Haze SIP package content and progress report template
  • Develop control strategies menu for major western state sources
Links to RHPWG Subcommittees

Work Products and Reference Material

WESTAR-WRAP region Point Source emissions data used in Regional Haze modeling scenarios
  • Representative Baseline v2 (RepBase2) and 2028 On The Books v2 (2028OTBa2) (XLS) – data review by WESTAR-WRAP states completed September 18, 2020
  • 2028 On The Books v2 (2028OTBa2) and 2028 Potential Additional Controls v2 (PAC2) (XLS) – data review by WESTAR-WRAP state completed October 9,2020
RHPWG Membership (XLS, June 1, 2021)

U.S. Forest Service Regional Haze Contacts in the WESTAR-WRAP region (January 19, 2021)

Communication Framework for Regional Haze Planning Sept. 3, 2019 RHPWG consensus

Regional Haze Planning Readiness Assessment Project WESTAR-WRAP Regional Haze Work Plan Completion & Results Virtual Remote Meetings

July 20, 2021 – Meeting 10 (final meeting)
Review of current status of TSS data and tool displays
Meeting recording (mp4 format)

May 5, 2021 – Meeting 9
Item 3 presentation
Item 4 presentation
Meeting recording (mp4 format)

April 1, 2021 – Meeting 8
Item 3 presentation
Item 4 presentation
Meeting recording (mp4 format)

March 9, 2021 – Meeting 7
WESTAR-WRAP Regional Haze Work Plan Results Meeting
Meeting recording (mp4 format)

February 18, 2021 – Meeting 6
WESTAR-WRAP Regional Haze Results Meeting – syllabus and items reviewed

December 22, 2020
Informal discussion with NM and MT about Using Rank_Point results (mp4 format)

December 17, 2020
Source Contribution Assessment using WRAP products - Idaho and neighbors case study

December 9, 2020
NM Class I area case study use of WEP/AoI results meeting (mp4 format)
Discussion slides
Q&A document subsequent to the meeting

November 19, 2020 – Meeting 5
WESTAR-WRAP Regional Haze Work Plan Results Meeting
Meeting recording (mp4 format)

September 2, 2020 – Meeting 4
WRAP Tribal Data WG Workplan Results for Regional Haze and Modeling Update

July 30, 2020 – Meeting 3, Day 2
Meeting 3, Day 2 recording (mp4 format)

July 23, 2020 – Meeting 3, Day 1
Meeting 3, Day 1 recording (mp4 format)

June 25, 2020 – Meeting 2, Day 2
Meeting 2, Day 2 recording – June 25th session on Modeling methodology topics (mp4 format)

June 23, 2020 – Meeting 2, Day 1
Meeting 2, Day 1 recording – June 23rd session on Modeling results and TSS display (mp4 format)

May 20, 2020 – Meeting 1, Day 2
Meeting 1 Day 2 recording - May 20th session on Emissions Data results (mp4 format)

May 19 , 2020 – Meeting 1, Day 1
Meeting 1 Day 1 recording - May 19th session on Monitoring Data results (mp4 format)

Calls and Meetings

April 7, 2020 (Notes)
  1. RTOWG modeling - Ralph Morris (PDF)
  2. March 16th 2028 Potential Additional Controls summary and next steps - David and Tom
  3. Status Update to May 19-20 “WESTAR-WRAP Regional Haze Work Plan Completion & Results Meeting” – Tom
  4. Mobile Source Emissions Inventory Projections project.- David/Jay/Tom (project wiki page: MobileSource Emissions Inventory Projections Project)
  5. WRAP State Regional Haze Progress Website –Amber (
January 14, 2020 (Notes)

December 3, 2019 WebEx/call

  1. Welcome, Roll Call, Note-taking duties, Agenda Review – Jay Baker, Amber Potts, David Stroh (Notes)
  2. TSS FAQ document review, request for approval – Elias Toon
  3. ADA accessibility need for Washington DoE – Jean-Paul Huys
    • State input roundtable discussion – Amber Potts
  4. Storyboard in the West demonstration / feedback process – Ed Merta
  5. State outreach/planning and timeline update – David Stroh
  6. TSS2 Delivery of modeling products for Regional Haze planning use – Pat Brewer
  7. Proposed Information Collection Request; Comment Request; Regional Haze Regulations (Renewal)” FR notice at: Due January 27th – RHPWG Co-Chairs
  8. Action items / next call date and time – RHPWG Co-Chairs
October 3, 2019 Outreach webex/call recording (MP4 format)

Topics: Sept. 3, 2019 August 6, 2019 July 2, 2019 Agenda

June 20, 2019 Outreach webex/call recording (MP4 format) May 7, 2019 Agenda RHPWG call minutes (DOCX format) Overview of Regional Haze Planning document for consensus approval (DOCX format)

March 20, 2019 Spring Outreach webex recording (MP4 format)
  • Monitoring Data Trend Analysis using TSS
    • Cindy Hollenberg (PDF)
    • Brandon McGuire (PDF)
  • Source Screening, Control Analysis, and Communication (PDF)
March 5, 2019 RHPWG call minutes (DOCX format)

2018 Calls and Meetings

April 4, 2018 RHPWG call minutes (DOCX format)

April 13, 2018 Regional Haze Monitoring vs. Modeling results comparison Audio Recording (MP4 format) Powerpoint (PPTX format)

Materials related to Monitoring Results (PPTX format) – added August 29, 2018

June 5, 2018 RHPWG call notes (PDF format)

August 7, 2018 RHPWG call notes (PDF format)

October 2, 2018 RHPWG bimonthly call agenda and notes

October 5, 2018 RHPWG Shared Database Subcommittee - TSSv2 Progress Report Audio Recording (MP4 format) Powerpoint (PPTX format)

December 11, 2018 RHPWG bimonthly call agenda and notes

December 12, 2018 RHPWG Control Measures Subcommittee / Regional Technical Operations WG – Single Source Identification / Analysis and Cumulative Regional Modeling Methods Audio Recording (MP4 format) Powerpoint (PPTX format)

2017 Calls and Meetings

June 29th

IMPROVE data and interpretation for Regional Haze planning July 27th

Glide Path and Natural Conditions Teach-In #2 recording (MP4 format) August 31st

Emissions (categories and forecasting) Teach-In #3 recording (MP4 format) October 19th

Modeling Teach-In #4 recording (MP4 format) November 16th

Source Apportionment & Source Control Evaluation (4-factor) Teach-In #5 recording (MP4 format) December 5-7, 2017

Western and National Regional Haze Planning Workshop, Denver (final interactive agenda)
  • December 5 recording (MP4)
  • December 6 recording (MP4)
  • December 7 recording (MP4)
Reference Material Links to other Resources
  • For Regional Haze Planning Data: WRAP TSS v2 Logo

  • For Information from the First Regional Haze Planning Period: Archived WRAP website Logo