Emissions Forum: Documents

Final Report: WRAP Mobile Source Emission Inventories Update
This report describes the methods used to estimate all on-road and off-road mobile source emissions for the WRAP region for the 2002 base year, and projections to 2008, 2013, and 2018. Emissions from marine shipping and road dust are also included. To construct these inventories, ENVIRON surveyed state and local air quality planning agencies to obtain the most up-to-date mobile source activity data and control program information. The inventories include the effects of all "on the books" federal, state, and local mobile source control programs. The report provides a series of graphs and tables of the emissions estimated; more detailed emission inventory information is available in spreadsheets on the project web page. (6/15/06) PDF (3.5 MB)

Emissions Data Management System (EDMS) Post-Beta Test Approach, Findings, and Recommendations. On behalf of the Emissions Forum, ERG has completed a "post-beta" test of the EDMS version available in September 2005. The report details the findings. For more information, please contact Tom Moore. PDF (12/28/05)

Emissions Data Management System (EDMS) Beta Test Approach, Findings, And Recommendations
On behalf of the Emissions Forum, ERG has completed a "beta test" of the EDMS version available in September 2004.  The report details the findings.  A second round of testing by ERG is planned for Spring 2005.  For more information, please contact Tom Moore. PDF (2.3MB)

Regional Modeling Center releases An Improved Ammonia Inventory for the WRAP Domain (4/8/05)
This project is the result of work by RMC staff during 2003-04. The technical methods and input data which support the improved ammonia emissions inventory are described in detail in the report. The Ammonia Emissions Estimates from applying this method in the regional air quality models are also displayed for several important emissions source categories. The displays presented in the technical report are based on annual emission totals and do not reflect temporal variations presented due to environmental parameters such as meteorological data and soil characteristics. While the spatial distribution shown in the emissions displays are the same, the actual magnitudes will differ; the report discusses these differences. If you have questions about the report or the data displays, please contact Gerry Mansell of the RMC team.

Development of "2002 Interim" WRAP Point and Area Source Emissions Inventories (6/07/04)
On behalf of the Emissions Forum, EH Pechan has developed "2002 interim" EIs projected from earlier data, to represent 2002 emissions from point and area sources. The approach for developing these EIs is described in the Technical Memo. Summary spreadsheets are also available. These EIs are being used for initial geographic source apportionment and source attribution work during 2004, and will be replaced in early 2005 by final 2002 EI data files from the EDMS. For more information, please contact Tom Moore.

• Technical Memorandum PDF or DOC (06/07/04)
• 2002 WRAP Point Sources Inventory
  • Summary by County XLS
  • Summary by State XLS
• 2002 WRAP Area Sources Inventory
  • Summary by County XLS
  • Summary by State XLS

WRAP Emissions Data Management System (EDMS) Under Development
The Emissions Forum is developing and implementing a comprehensive, web-based EDMS to support state and tribal regional haze implementation plan development. This system is to be used for technical and policy evaluations by WRAP members, stakeholders, and other interested parties in the region. The EDMS is to be capable of:

• Receiving and storing reported emissions data from state/tribal/local air agencies;
• Producing complete baseline and projection years' quality-assured and gap-filled regional emissions inventories;
• Tracking emissions for technical and regulatory planning purposes;
• Providing graphic displays and user-specified reports from data queries; and
• Presenting this information as geographic information system (GIS) displays, flat files, air quality model-ready input files, and other formats.

E.H. Pechan is leading a team to build and operate the EDMS, and the project is managed by a steering committee composed of representatives from several WRAP Forums. The EDMS is expected to be on-line in late 2004. The project web site is: www.pechan.com/edms. For more information, please contact Tom Moore. (3/22/04)

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.

Request For Proposals - Representative Community Emissions Inventory (02/06/04) PDF or DOC

Request for Proposal: Design and Implementation of an Emissions Data Management System
The WRAP Emissions Forum is interested in preparing a design, and implementing the operation of a comprehensive, web-based air pollution Emissions Data Management System (EDMS) to support state and tribal regional haze implementation plan development. This system is to be used for technical and policy evaluations by WRAP members, stakeholders, and other interested parties in the region. (09/30/03) PDF or DOC

Final Report: Needs Assessment for Evaluation and Design of an Emissions Data Reporting, Management, and Tracking System

The Emissions Forum has completed a Needs Assessment for a comprehensive web-based air pollution emissions data reporting, management, and tracking system to support state and tribal regional haze implementation plan (SIP/TIP) development. The system described in the final report will be capable of receiving and storing emissions data in EPA-compliant emissions reporting formats, producing user-specified reports, performing user-selected quality control and assurance tests, allowing data queries and graphic display, and presenting this information in geographic information system (GIS) format. EA Engineering, Science, and Technology, Inc. conducted this Needs Assessment project for the Emissions Forum. The overall approach of this needs assessment consists of the following tasks:

• Task 1: Determine the emissions data to be reported, managed and tracked.
• Task 2: Conduct a comparative analysis of existing emissions data management systems approved and in use by EPA and state air quality agencies.
• Task 3: Prepare a report addressing issues associated with developing a new system, long-term system maintenance and operation of the recommended data management system, by integrating information gathered in Tasks 1 and 2.

This report presents the results of Task 3 and represents the final technical report of the project. It provides the documentation from the two workshops and questionnaires, the findings based on the input received from the two workshops and questionnaires, an evaluation of existing EDMS, and the system recommendations.

• Download Final Report ZIP

Projections Report for the 2018 Base Case Emission Inventory

Below is a copy of a report from EH Pechan & Associates describing the methods and results of their contract to Project the 1996 WRAP Emission Inventory forward to 2018. The projections were made for the "Point" and "Area" source categories covering 22 states. The states include the full 13 State WRAP region and the 9 State CENRAP region that borders the WRAP as part of the Modeling Domain. The emissions were compiled for seven pollutants including VOC's, NOx, CO, SO2, PM-10, PM-2.5 and NH3.

There is one "Base Case" projection for all pollutants in both source categories (point & area). This "Base Case" assumes that emissions change solely due to the effect of Economic & Population growth, normal source retirement & replacement, and emissions controls that are currently mandated by Federal, State or Local regulation.

In addition, the report covers four other "Scenarios" to evaluate the "Annex" Market Trading plan against a "Command & Control" BART implementation option (w/ & w/o uncertainty). These additional four projections consider the emissions of SO2 only, and then modify those emissions solely for "major" Point Sources.

There is a "Control Case" scenario that evaluates the SO2 milestones adopted by the Market Trading Forum (MTF) in the Regional Haze Rule Annex, leading to a region wide SO2 emission total of 510,000 TPY in the 9 GCVTC transport region states by 2018.

There is a "Command & Control" scenario that assumes approximately 156,000 TPY of SO2 emission reductions occur by 2018 due to the implementation of retrofit controls on the list of "BART - eligible" sources.

There is a "Command & Control w/ uncertainty" scenario that adds back in approximately 65,000 TPY of SO2 to account for uncertainty due to the fact that BART implementation doesn't consider such variables as production capacity and other process variables; while the Market Trading Scenario "guarantees" an absolute emission cap.

Finally, there is a "Pollution Prevention" scenario (P2) that takes into account the Regional Haze Rule goals of supplying 10% of the WRAP regions energy from renewable sources or energy efficiency (RE/EE) in 2005 and 20% in 2015. SO2 emission totals do not change between the Annex and the P2 case because the Market Trading milestones put an absolute cap on sulfur emissions, and any savings due to RE/EE implementation simply allows that same tonnage to remain un-controlled at some Utility Point Source. Because NOx is not subject to this Cap & Trade program, any energy saving due to RE/EE implementation does reduce the demand for fossil fuel fired electricity, and the associated NOx emissions do go down (apprx. 14K TPY reduction in NOx).

• Download Report: PDF or Zipped WPD (Updated 12/04/02)

WRAP Base Year Emissions Inventory

The WRAP Emissions Forum contracted with Pacific Environmental Services (PES Project Manager; Mark Saeger) to compile the 1996 WRAP region base year Emissions Inventory, utilizing the EPA's 1996 National Emissions Inventory (NEI) as the initial basis for this inventory. PES augmented and updated the NEi with information solicited directly from state, local and tribal agencies in the WRAP region. (Updated 8/23/01)

Quality Assurance Review of the Original 1996 Point Source Emission Inventory

The Emission Forum contracted with E.H. Pechan and Associates to conduct a Quality Assurance review of the original "Version 1" of the 1996 WRAP Point Source Database. The results of that QA review are described in Pechan's April 5, 2002 Report (listed as the "2002-04_QA Report" file available below).

• Download 2002-04_QA Report WPD

Based on the 2002 Pechan Quality Assurance review of the original "Version 1" of the 1996 WRAP Point Source Database, the Emission Forum contracted with E.H. Pechan and Associates to make corrections to errors detected by the QA review. Pechan produced "Version 2" of that 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 1996 Point Source database currently residing on this web site (listed as the "WRAP96PointV3_022803.zip" file available on the "Point Sources" page of the Emission Forum Web page).

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 dated "Technical Memorandum" (listed as the "2003-03_Pechan TECHMEM0-final" file available below).

• 2003-03_Pechan TECHMEM0 WPD

Year 2000 Point Source SO2 Emissions Analysis - 9 State Western Region

This report compiles the SO2 emissions from major stationary sources in the Grand Canyon Visibility Transport Commission nine state transport region for the year 2000. As most of those familiar with Regional Haze legislation know, the GCVTC projected that there would be at least a 13% reduction in these stationary source SO2 emissions in the decade following 1990. The Regional Haze Rule subsequently incorporated the GCVTC recommendations into a Section 309 RHR requirement for the region to achieve that 13% reduction by the year 2000.

This report compares this newly compiled Y2K total against the emissions that were measured from these major stationary SO2 sources in 1990. Pechan has concluded that the actual reduction in stationary source SO2 emissions over the past decade amounts to about 207,000 TPY, or a approximately 25% reduction from the approximately 829K tons emitted in 1990.

Inter-RPO Emission Inventory Letter

This letter describes the needs of the RPO directors across the country to have EPA complete several national emissions inventory improvement tasks in a timely manner. WRAP Emissions Forum members participated in the development of this inter-RPO letter.

WRAP Region Emissions Inventory Survey

The Emissions Forum conducted a Survey of Emissions Inventory representatives in state and local air quality agencies within the thirteen western states that compose the WRAP region. The purpose of this Survey was to determine the state of preparation and availability of EI data in the WRAP region. The information gained from the Survey will be used to identify areas of concern, and to prioritize WRAP resources and efforts in creating the organization's Regional Emissions Inventory System.

Mexico National Emissions Inventory - Draft Report
The Mexico National Emissions Inventory (NEI) is the first national emissions inventory for the country of Mexico. The Mexico NEI project is sponsored by Mexico's Instituto Nacional Ecología (INE), with the technical assistance and partnership of the U.S. Environmental Protection Agency (EPA), the Western Governors' Association (WGA), and the North American Commission for Environmental Cooperation (CEC). The Mexico NEI represents a significant effort by many public and private entities, including Mexican and U.S. federal and state environmental agencies located along both sides of the Mexico/U.S. border, as well as in Mexico City, and all other Mexican states. This project offers an outstanding example of what can be accomplished through international cooperation between Mexico, the U.S., and Canada. The draft Mexico NEI report is now available for review. Also, the English and Spanish reports and appendices may be downloaded from the project web site at www.erg.com/mnei (User name: "mexico" and Password: "emissions" all lower case). A limited number of hard copies and CDs are available upon request from Paula Fields of ERG.

This draft report contains the preliminary emissions inventory of criteria pollutants (NOx, SOx, CO, VOC, PM10, PM2.5, and NH3) for point, area, mobile, and natural sources located in the northern 6 Mexican/U.S. border states of Baja California, Sonora, Chihuahua, Coahuila, Nuevo Leon, and Tamaulipas. In March 2004, a draft final inventory will be completed, including revised border state estimates and initial interior state estimates at the municipality-level for all source types. The final national emissions inventory for Mexico will be issued in July 2004. If you would like to submit comments on this draft report (comment period closes October 1, 2003), or learn more about this important project, please contact Paula Fields at [email protected] or Rich Halvey at [email protected].

• Draft Report (English, 08/12/03) PDF
• Draft Appendix (English, 08/12/03) PDF

2002 Interim WRAP Point and Area Source Emissions Inventories

• Point Sources
• Area Source

RFP for Determining Fugitive Dust Emissions from Wind Erosion PDF