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Section 309 Haze 

Planning Support 

- Select A Forum Destination - 

What is Section 309? 

Section 309 of the RHR includes a 

provision that recognizes the work of the 

Grand Canyon Visibility Transport 

Commission, which addresses regional 

haze impacts within 16 western Class I 

areas on the Colorado Plateau. This 

section of the rule offers an early “opt-in” 

for regional haze planning by the States 

and Tribes in the GCVTC region. 

Compliance with the reasonable progress 

requirements of the rule is achieved by 

including the recommendations already 

developed by the GCVTC, In addition, 

“Best Available Retrofit 

Technology” (BART) must be included 

on specific categories of major stationary 

sources of haze-producing pollutants, 

primarily existing electrical generating 

units (EGUs) that emit large quantities of 

SO2 and NOx. The States of Arizona, 

New Mexico, Oregon, Utah, and 

Wyoming opted into this provision and 

submitted complete §309 regional haze 

plans to their respective EPA regional 

offices by the deadline of December 2003. 

Oregon has since decided to address 

regional haze planning through §308 of 

the RHR. Bernalillo County 

(Albuquerque) has air quality planning 

responsibilities in that portion of New 

Mexico and has submitted its §309 

regional haze plan independently. 

Since the 2003 submittals the §309 states 

have been successfully implementing the 

GCVTC recommendations along with 

other measures contained in the plans. 

These include documented SO2 

reductions far in excess of those 

anticipated in the submitted plans, BART 

determinations, active smoke management 

SIP Haze Planning 

Status Summary 

SIP Haze Planning Status 

Home Page 

z §308 Support 

z §309 Support 

Implementation Work Group

State Contacts: 

z Alaska

Alice Edwards

z Arizona

Lisa Tomczak

Bruce Friedl

Corky Martinkovic 

z California

Tina Suarez-Murias

z Colorado 

Ray Mohr

z Hawaii

Priscilla Ligh

z Idaho

Mike Edwards

z Montana

Laurel Dygowski

z North Dakota

Tom Bachman

z New Mexico

Rita Bates 

z Alb/BC , NM

Neal Butt

z Nevada

Frank Forsgren

Adele King Malone

z Oregon

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programs for prescribed burning, dust 

controls, energy efficiencies and other 

control measures. 

The Western Regional Air Partnership has 

been working closely through its various 

committees and forums to provide 

background data and support for 

preparation of Section 309 state 

implementation plans. A complete list of 

those documents is provided listed below. 

Other states and tribes have participated in 

developing these materials and may 

choose to use elements of the Section 309 

plans to template in developing their own 

plans due in the next few years. 

See http://www.wrapair.org/SIPStatus

for a status table for each states’ SIP 

development progress. 

Regional Haze Rule – Part 51.300-309, 

and Guidance, Appendix Y

Regional Haze Rule – Part 51.300-309, 

and Guidance, Appendix Y

“Each section of the Regional Haze Rule, 

40CFR 51 300-309, is presented here, 

along with Appendix Y. The rule was first 

promulgated July 1, 1999, and was 

amended in Federal Register notices on 

July 6, 2005 (to modify BART provisions 

and provide guidelines as Appendix Y) and 

on October 13, 2006 (to add alternativesto-BART provisions, replacing the 309 

SO2 Annex). These revisions are indicated 

by highlights in the text of sections 302, 

308 and 309 – grey for the July 6, 2005 

revisions, yellow for the October 13, 2006 

revisions.”

2008 Regional SO2 Emissions and 

Milestone Report (03/31/10) PDF or 

DOC 

This report compares the 2006-2008 sulfur 

dioxide emissions with the 2008 milestone 

for the four §309 states participating in the 

Western Emissions Backstop Trading 

Program. This is a transitional report 

comparing emissions against the revised 

Final Documents

Brian Finneran

z South Dakota

Rick Boddicker 

z Utah

Jim Schubach

z Washington

Doug Schneider

z Wyoming

Tina Anderson

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2008 milestone as presented in current 

State Implementation Plans (SIP’s). Utah 

& Wyoming have submitted revised SIP’s 

for review by EPA, while Arizona and 

New Mexico are in the process of 

completing their revisions. Only 

stationary sources emitting greater than 

100 tons per year are included in the 

program. Results indicate that the 2006-

2008 average emissions were about 30% 

below the revised 2008 milestone for the 

four §309 states. 

2007 Regional SO2 Emissions and 

Milestone Report (03/31/09) PDF or 

DOC 

This report compares the 2005-2007 

sulfur dioxide emissions with the 2007 

milestone for the four §309 states 

participating in the Western Emissions 

Backstop Trading Program. This is a 

transitional report comparing emissions 

against the 2007 milestone as calculated 

under the original 2003 State 

Implementation Plans (SIP’s), as well as 

against the revised 2007 milestone as 

calculated under the current plans (Utah & 

Wyoming have submitted revised SIP’s, 

while Arizona and New Mexico are in the 

process of completing their revisions). 

Only stationary sources emitting greater 

than 100 tons per year are included in the 

program. Results indicate that the 2005-

2007 average emissions were about 33% 

below the revised 2007 milestone for the 

four §309 states. 

§309 Program Materials (April ‘08 Final 

Revisions) 

Four western states (AZ, NM, UT & WY) 

are planning on re-submitting State 

Implementation Plans under Section §309 

of the federal regional haze rule. These 

states (along with OR) originally 

submitted SIP’s in 2003, but due to legal 

challenges, these initial submittals were 

never approved by the EPA. The four 

remaining §309 states began working on 

redesigning the SO2 Milestones required 

for the §309 Regional Haze option in 

early 2007, and have now developed a 

proposal for revised Milestones, along 

with a variety of supporting materials for 

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implementing the Backstop SO2 Trading 

Program. The milestones and the 

supporting materials have been revised in 

response to Stakeholder comments 

received during multiple Stakeholder calls 

over the Winter of 2007-2008. Available 

below for download and stakeholder 

review are the Final key materials 

supporting the new §309 SO2 Milestones 

and Backstop Trading Program. 

z Projection of Visibility tables and 

explanation (12/11/07) PDF or 

DOC 

z Better than BART document - 

typographical correction (07/23/09) 

PDF or DOC 

z SIP Table Yearly Milestones 

(04/23/08) XLS 

z Milestone Spreadsheet Version 27 - 

typographical correction (04/29/09) 

XLS 

z Model SIP-TIP (04/23/08) PDF or 

DOC 

z Example Trading Rule (Note: each 

§309 State will have its own 

Version of this Rule) PDF 

2006 Regional SO2 Emissions and 

Milestone Report (03/20/08) PDF or 

DOC 

This report compares the 2004-2006 

sulfur dioxide emissions with the 2006 

milestone for the four-state region 

participating in the Western Emissions 

Backstop Trading Program. Only 

stationary sources emitting greater than 

100 tons per year are included in the 

program. The 2004-2006 average 

emissions were about 30% below the 

milestone for the four remaining §309 

states. 

FINAL REPORT: WRAP SO2 

MILESTONE TRACKING PROCESS 

AUDIT (10/02/07) PDF

Five western states (AZ, NM, OR, UT & 

WY) submitted State Implementation 

Plans under Section §309 of the federal 

regional haze rule [40 CFR 51.309] to 

establish a sulfur dioxide (SO2) 

milestones and a backstop trading 

program. This program requires major 

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industrial sources of SO2 emissions to 

submit an annual emissions inventory to 

their respective state air quality offices. 

These inventories, in turn, are compiled 

by the Western Regional Air Partnership 

(WRAP) and analyzed to determine 

compliance with the regional SO2 

milestones. 

The backstop trading program also calls 

for an independent audit to ensure that the 

state inventories and regional analyses are 

accurate and efficient. The program 

guideline states that the first audit shall 

occur during the 2006 calendar year, and 

shall review data collected during the first 

two years of the program. The primary 

focus of the audit is on the process that is 

used to compute the regional inventory 

from the data provided by each state, and 

the tracking of accumulated changes 

during the period between SIP revisions. 

The audit shall also review the accuracy 

and integrity of the regional reports that 

are used by the §309 states to determine 

compliance with the milestones. 

This document represents the FINAL 

Report, describing the results of the 

milestone tracking program audit that was 

conducted by E.H. Pechan & Associates 

during the Fall of 2006. The participating 

§309 States completed Public Notice of 

this report during the Spring/Summer of 

2007 to provide an opportunity for public 

review and comment on the draft audit 

report. The audit report then goes to the 

EPA under each states’ Administrative 

process. 

2005 Regional SO2 Emissions and 

Milestone Report (04/02/07) PDF or 

DOC 

This report compares the 2003-2005 

sulfur dioxide emissions with the 2005 

milestone for the five-state region 

participating in the Western Emissions 

Backstop Trading Program. Only 

stationary sources emitting greater than 

100 tons per year are included in the 

program. The 2003-2005 average 

emissions were about 27% below the 

milestone for the five states. 

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2004 Regional SO2 Emissions and 

Milestone Report (03/31/06) PDF or 

DOC

This report compares the 2003-2004 

sulfur dioxide emissions with the 2004 

milestone for the five-state region 

participating in the Western Emissions 

Backstop Trading Program. Only 

stationary sources emitting greater than 

100 tons per year are included in the 

program. The 2003-2004 average 

emissions were about 25% below the 

milestone for the five states. 

2003 Regional SO2 Emissions and 

Milestone Report (04/21/05) PDF or 

DOC

This report compiles the 2003 emissions 

from sources subject to the western 

backstop SO2 trading program and 

compares them to the 5-state regional 

milestone. Emissions were found to be 25 

percent below the milestone. 

Model Rule for the Western Backstop 

SO2 Trading Program 

Western Backstop SO2 Trading 

Program Model Rule (08/13/03) PDF 

Western Backstop SO2 Trading 

Program Model Rule Supplement

(08/13/03) PDF

State Implementation Plan Template 

Model SIP/TIP for the Western 

Backstop SO2 Trading Program

(08/13/03) DOC

Final Draft 309 SIP Template, not 

including the Western Backstop SO2 

Trading Program (07/10/03) DOC 

z Redline/strikeout version showing 

changes from prior version 

(07/10/03) DOC 

z Summary Presentation (04/03/03) 

PPT 

Referenced Documents 

After the first 3, the following documents 

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are organized to match the order of 

Section 309:

z Technical Support Document 

(12/15/03 see separate section 

below) 

z Grand Canyon Visibility Transport 

Commission Final Report (June 

1996) PDF 

z Regional Haze Rule and Preamble 

(64 Federal Register 35714 - 

07/01/99) PDF 

z Clean Air Corridors 

{ WRAP Policy on Clean Air 

Corridors (11/13/02) PDF or 

DOC 

z Stationary Sources 

{ See above for the Western 

backstop SO2 Trading 

Program Model Rule and 

Model SIP/TIP 

{ Western Backstop SO2 

Emissions and Allowance 

Tracking System Analysis 

(07/31/03) PDF or WPD (Zip 

Archive) 

{ Stationary Source NOx and 

PM Emissions in the WRAP 

Region: An Initial 

Assessment of Emissions, 

Controls, and Air Quality 

Impacts (10/01/03) HTML 

{ Recommendations for 

Making Attribution 

Determinations in the Context 

of Reasonably Attributable 

BART (05/22/03) PDF 

{ Draft Memorandum of 

Agreement (MOA) Between 

Federal Land Managers 

andStates to Address the 

RAVI Certification Process 

(01/13/03) DOC 

{ Western Revision to Section 

309 Incorporating the Annex 

(68 Federal Register 33764 - 

06/05/03) PDF 

z Mobile Sources 

{ Development of WRAP 

Mobile Source Emissions 

Inventories (02/09/04) PDF 

{ EPA Proposal to Revise 

Section 309 Mobile Source 

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Provisions (68 Federal 

Register 39842 - 07/03/03) 

PDF 

z Fire Sources 

{ WRAP Policy on Enhanced 

Smoke Management 

Programs for Visibility 

(11/12/02) PDF 

{ WRAP Policy on Annual 

Emission Goals for Fire 

(04/02/03) PDF 

{ WRAP Policy on Fire 

Tracking Systems (04/02/03) 

PDF 

{ Non-Burning Alternatives for 

Vegetation and Fuel 

Management on Wildlands 

(11/02) PDF 

{ Non-Burning Management 

Alternatives on Agricultural 

Lands in the Western United 

States (05/15/02) ZIP 

{ Assessing Status of 

Incorporating Smoke Effects 

into Fire Planning and 

Operations (08/29/02) PDF 

z Rd. Dust (emissions inventory 

information is found in the WRAP 

Mobile Source Emissions 

Inventories report, above) 

{ Methodology for Estimating 

Fugitive Windblown and 

Mechanical Rd. Dust 

Emissions Applicable for 

Regional Scale Air Quality 

Modeling (04/01) DOC or 

PDF 

z Pollution Prevention 

{ WRAP Policy on Renewable 

Energy and Energy 

Efficiency As Pollution 

Prevention Strategies For 

Regional Haze (04/03) DOC 

{ Recommendations of the Air 

Pollution Prevention Forum 

to Increase the Generation of 

Electricity from Renewable 

Resources (06/30/00) HTML 

{ Economic Assessment of 

Implementing the 10/20 

Goals and Energy Efficiency 

Recommendations (10/02) 

DOC 

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{ Determining a State's 

Contribution to the GCVTC 

Regional Renewable Energy 

Goals HTML 

{ Minutes from the Pollution 

Prevention Workshop for the 

Preparation of Section 309 

SIPs and TIPs, Portland, OR 

(05/20/03) DOC 

Tribal Implementation Plan 

EPA-Tribal Protocol, Regional Haze 

TIP Development and Rulemaking 

Action (FINAL)

The EPA-Tribal Protocol is intended to 

facilitate a collaborative process of 

developing, reviewing and implementing 

Section 309 Tribal Implementation Plans 

(TIPs) under the Regional Haze Rule. The 

protocol contains the commitments and 

expectations for both the EPA and tribes 

involved in the TIP process. Deadline for 

submission of comments was March 11, 

2005. PDF or DOC

Section 309 Tribal Guidance Document

The Section 309 Tribal Guidance 

Document has been developed to assist 

tribes within a nine-state region (Arizona, 

California, Colorado, Idaho, Nevada, New 

Mexico, Oregon, Utah, Wyoming) to 

develop regional haze implementation 

plans. The guidance document is meant to 

offer information relevant to making a 

commitment to a visibility-based Tribal 

Implementation Plan (TIP), as well as 

giving options to a tribe regarding a 

Federal Implementation Plan (FIP). 

(09/17/04) PDF or DOC 

Model Tribal Implementation Plan 

(TIP) Template for Section 309 of the 

Regional Haze Rule (FINAL) 

The 309 Regional Haze TIP template may 

be used by those federally recognized 

tribes located in any of the following 

states: Arizona, California, Colorado, 

Idaho, Nevada, New Mexico, Oregon, 

Utah, and Wyoming. The template 

contains general language and other 

elements that are necessary in obtaining 

U.S. Environmental Protection Agency 

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(EPA) approval of regional haze 

implementation plans. Adoption of a 

regional haze TIP is optional for tribes. 

(02/15/05) PDF or DOC

Technical Support Document (TSD) 

The final version of the regional Section 

309 TSD, originally published December 

15, 2003, has been updated as of May 7, 

2008. The only portion of the TSD revised 

in the May 7 update is the Cover Page and 

Table of Contents. The update to the 

Table of Contents provides annotations 

describing the sections of the TSD still 

applicable to the 2008 Section 309 

Regional Haze Plans, and where the 309 

Haze Plans are based on newer and more 

complete data, directing the reader to the 

WRAP Technical Support System (TSS) 

for current regional haze technical support 

data and information. 

z Download TSD PDF (05/07/08, 3.2 

MB) 

County-level emissions inputs to the 

regional air quality modeling simulations 

are available at WRAP TSS, under the 

Haze Planning button, then select

Emissions Review Tool. 

Please contact Tom Moore with questions 

about the TSD. 

Emission Inventories 

Point Sources

The files below contain "Version 3" of the 

WRAP Point Source emissions estimates 

for 22 US States which are located west of 

the line marked by the eastern borders of 

the states in the line from Minnesota to 

Louisiana. States encompassed by the 

inventory domain include the 13 

contiguous WRAP region states (Arizona, 

California, Colorado, Idaho, Montana, 

Nevada, New Mexico, North Dakota, 

Oregon, South Dakota, Utah, Washington 

and Wyoming), and the 9 CENRAP states 

(Arkansas, Iowa, Kansas, Louisiana, 

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Minnesota, Missouri, Nebraska, 

Oklahoma and Texas). 

The original "Version 1" of the Point 

Source Database was compiled by Pacific 

Environmental Services in 2001 (the PES 

Report on this database compilation can 

be found listed as the "Final Report: 

Development of the 1996 Base Year 

Emissions Inventory for Regional Haze 

Analysis" file available on the 

"Documents" page under the "WRAP 

Base Year Emissions Inventory" section 

of the Emission Forum Webpage). 

A Quality Assurance review of "Version 

1" revealed a number of data errors, 

therefore the Emission Forum contracted 

with E.H. Pechan and Associates to revise 

this 1996 Point Source database file to 

correct those detected errors. Pechan 

produced "Version 2" of the database in 

the Fall of 2002, which underwent 

thorough State and Local review. This 

State & Local review produced significant 

comment, which Pechan addressed by 

producing the March 11, 2003 updated 

"Version 3" of this database (listed as the 

"WRAP96PointV3_022803.zip" file 

available below). 

The changes that were made to the 

original 1996 Point Source database by 

both the "Version 2" and the "Version 3" 

revisions were described in a March 7, 

2003 "Technical Memorandum" (listed as 

the "2003-03_Pechan TECHMEMO.wpd" 

file available on the "EI Documents" page 

under the "Quality Assurance Review of 

the Original 1996 Point Source Emission 

Inventory" section of the Emission Forum 

Webpage). 

z Instructions for opening source 

DBF files in Access 97 DOC 

z WRAP96PointV3_022803.zip

(Zipped DBF) (Updated 03/11/03) 

{ Field Code Reference for 

point sources database PDF 

{ NEI Input Format ZIP

(Zipped MDB) 

z Emissions summary for point 

sources by county XLS

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Includes emissions of all pollutants 

by County (Updated 03/11/03) 

z Emissions summary for point 

sources by state XLS

Includes emissions of all pollutants 

by State; # of facilities and # of 

emissions records by State (Updated 

03/11/03) 

Mobile Sources

Development of WRAP Mobile Source 

Emissions Inventories PDF (02/09/04) 

On behalf of the Emissions Forum, 

ENVIRON Corporation has developed 

approaches for estimated mobile source 

emissions across the contiguous WRAP 

region, used in the §309 analyses. 

Projecting emissions from 1996 through 

2018, this report describes in detail the 

methods used to estimate mobile source 

emissions, and provides the resulting 

emissions estimates. Emissions in this 

mobile sources inventory include on-road 

and off-road vehicles and engines, and 

though typically not considered part of 

mobile sources, road dust emissions 

estimates are also described in this report. 

z Memo: Results of using air quality 

modeling to evaluate mobile source 

significance DOC (11/04/02) 

z Memo: Summary of on-road, offroad, and total mobile source 

emissions from 1996 through 2018 

by region, state, and selected urban 

areas over 250,000 people DOC

(11/26/02) 

Area Sources

The files below contain the final 1996 

base-year WRAP estimates of Area 

Source emissions for 22 US States which 

are located west of the line marked by the 

eastern borders of the states in the line 

from Minnesota to Louisiana. States 

encompassed by the inventory domain 

include the 13 contiguous WRAP region 

states (Arizona, California, Colorado, 

Idaho, Montana, Nevada, New Mexico, 

North Dakota, Oregon, South Dakota, 

Utah, Washington and Wyoming), and the 

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9 CENRAP states (Arkansas, Iowa, 

Kansas, Louisiana, Minnesota, Missouri, 

Nebraska, Oklahoma and Texas). 

These files represent State supplied area 

source emissions estimates from 9 states 

(California, Colorado, Louisiana, 

Missouri, Oklahoma, Oregon, Texas, Utah 

and Washington), while the estimates for 

the remaining states are based on the 1996 

NEI annual emissions inventory. These 

files DO NOT include estimates for 

highway mobile sources, off-highway 

mobile sources, dust from either unpaved 

or paved roads, or emissions from 

wildfire, prescribed burning and 

agricultural burning. The emissions 

estimates for geogenic wind blown dust 

from undisturbed natural soils has been set 

to zero for all states in these files. 

z Instructions for opening source 

DBF files in Access 97 DOC

 

z Wga_ar96.zip ZIP (Zipped DBF) 

 

z Emissions summary for area 

sources by county XLS 

Includes emissions totals for all 

pollutants by County (Updated 

07/08/02) 

 

z Emissions summary for area 

sources by State XLS 

Includes emissions for all pollutants 

by State; and # of emissions records 

by State (Updated 07/08/02) 

Fire Sources

Wildfire, Prescribed (Rx) 

Wildland Fire and 

Agricultural Fire 

Emissions Inventories 

The spreadsheets below contain 

summaries of the WRAP States 

"Wildfire", "Prescribed (Rx) Wildland 

Fire" and "Agricultural Fire" Emissions 

Inventories that have been compiled by 

the Fire Emissions Joint Forum (FEJF), 

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for the years, 1996 and 2018. 

The Emissions Inventories are compiled 

for seven regional haze pollutants 

including: VOC's, NOx, CO, SO2, PM10, PM-2.5, and NH3. 

Each EXCEL spreadsheet file listed below 

contains two individual data sheets, 

followed by graphs of the distribution of 

the emissions throughout the WRAP 

region. 

Sheets #1 & #2 of each spreadsheet file 

summarize emissions data. Sheet one 

summarizes the data by state, for each of 

the 13 contiguous WRAP States (with a 

separate subtotal of the emissions 

generated by the 9 GCVTC transport 

region states). Sheet two summarizes 

emissions by county, for each of the 533 

counties in those 13 WRAP States where 

the FEJF determined that fire occurs (if a 

county is not listed, that means that the 

FEJF has found no fire emissions for that 

category in the county). 

Sheets #4 through #17 of each spreadsheet 

file provide graphs of the emissions data. 

For each of the seven listed pollutants, 

there is both a "Bar Chart" and a "Pie 

Chart" showing the distribution of the 

emissions of that pollutant in the 13 

WRAP States. 

For 1996, the FEJF calculated an emission 

inventory for the "actual" wildfire activity 

that occurred that year. The FEJF also 

calculated an emission inventory for 

actual Prescribed (Rx) Wildland Fire in 

1996, but they were unable to compile any 

data for 1996 Agricultural Fire, so there is 

no 1996 inventory for Agricultural Fire. 

The 1996 spreadsheets include: 

z 1996_wildfire_sum.xls 

z 1996_rx_sum.xls 

For 2018, the FEJF calculated an emission 

inventory for the "average" wildfire 

activity that historically has occurred (as 

1996 was considered an extreme wildfire 

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year). The 2018 wildfire spreadsheet is: 

z 2018_wildfire_sum.xls 

Regarding 2018 projections for Prescribed 

(Rx) Wildland Fire and for Agricultural 

Fire, the FEJF calculated three scenarios 

for each of these two categories; a "Base 

Year" emission inventory, a "No Smoke 

Mangement" alternative, and an "Optimal 

Smoke Mangement" alternative 

alternative. The 2018 spreadsheets 

include: 

z 2018_rxbase_sum.xls 

z 2018_agbase_sum.xls 

z 2018_rxnsm_sum.xls 

z 2018_agnsm_sum.xls 

z 2018_rxosm_sum.xls 

z 2018_agosm_sum.xls 

WRAP Region Combined Categories 

Summaries

The files below contain summaries of a 

complete WRAP Region Emission 

Inventory (13 contiguous WRAP states 

include: AZ, CA, CO, ID, MT, NV, NM, 

ND, OR, SD, UT, WA & WY). 

The summaries are compiled for all Seven 

Visibility Impairing Pollutants (VOC, 

NOx, CO, SO2, PM10, PM2.5 & NH3), 

for the years 1996 and 2018. 

The Nine Emission Source Categories 

include: 

z point sources 

z area sources 

z on-road mobile sources 

z non-road mobile sources 

z wildfire 

z prescribed wildlands fire (Rx) 

z agricultural fire 

z paved road dust (PM only) 

z unpaved road dust (PM only) 

The two summary spreadsheets for 1996, 

and for 2018, each contain the following 

information: 

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The first page of each spreadsheet 

contains a "Summary" of the emissions 

from each of the source categories, their 

percentage of the WRAP region total and 

the year's tonnage for each pollutant. The 

second page contains the "State Totals" of 

each Source Category, for each pollutant. 

Sheets #3 through #16 of each spreadsheet 

file provide graphs of the emissions data. 

For each of the seven listed pollutants, 

there is both a "Bar Chart" and a "Pie 

Chart" showing the distribution of the 

emissions of that pollutant in the 9 

Emission Source Categories. 

For 1996, the EXCEL spreadsheet 

"1996_Summary-Actual.xls" contains 

actual emissions data compiled by the 

WRAP. There was no "Agricultural Fire" 

data available for 1996 however, so that 

category is shown as "zero" on the 

spreadsheet, when in actuality there likely 

were emissions from this source category 

that year. 

z 1996 Summary-Actual.xls 

For 2018, the EXCEL spreadsheet 

"2018_Summary-Control.xls" contains 

maximum controlled emission data as 

projected from the 1996 baseline. There 

were four source categories where 

projected emission inventories were 

compiled for multiple scenarios. These 

include "point" sources and the three 

"fire" sources (wildfire, Rx & ag). For the 

point sources, the scenario represented in 

this spreadsheet represents the Annex SO2 

Emission Milestones. For 2018 wildfire, 

the scenario selected is an "average" 

wildfire year (1996 represented a high 

extreme). For the other two fire sources 

(Rx & Ag), the selected option represents 

the "Optimal Smoke Management" 

scenario. 

z 2018 Summary-Control.xls 

The third EXCEL spreadsheet is "2018-

1996_Difference_Actual_to_Control.xls", 

and this spreadsheet summarizes the 

Emission Totals for 1996, and for 2018, 

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by Emission Source Category. It also 

calculates the change in emissions for 

each of these Source Categories, and the 

"Total Emission Change" in the WRAP 

Region for each pollutant. The change is 

calculated as total tons reduced (-) or 

increased (+) during the period, and the 

percentage change in that total. 

z 2018-1996 Difference_Actual to 

Control.xls 

 

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