Guidance/Support

Please click on the appropriate area below

• Modeling Guidance

• Model Clearinghouse

• Topics for Review and Comment

Modeling Guidance

 
Listed in this section are the Guideline on Air Quality Models and other related guidance and support documents.

General Guidance

Appendix W          Guideline on Air Quality Models                                      Appendix W (July 2003) of 40 CFR Part 51                                         Response               Summary of Public Comments & EPA Responses    Preferred/Recommended       Models listed in Appendix A      Models    Alternative Models                 Models for use on a case-by-case basis.                                                        CHECKLIST            Example Air Quality Analysis Checklist                                       Please read the Explanatory Note  first.

SCRNG                  Screening Procedures for Estimating the Air Quality                                     Impact of Stationary Sources, Revised. (Wordperfect)       AREAUPD            Update related to area source estimated concentrations.

GEP                      Guidance for Determination of Good Engineering                                     Practice Stack Height.  (Technical Support Document                                   for Stack Height Regulations)

TOXICS

TOXG                    Guidance on Hazardous/Toxic Air Releases                                      5 documents included (1.9MB,ZIP)

AIRMODSS            Volume V - Procedures for Air Modeling of Superfund Sites                                     (246KB,ZIP)

WSAIRTOX            National Specialty Workshop on Technical Tools for Air                                      Toxics Assessment Final Report 10/27/97

UATW2                  Dispersion Modeling of Toxic Pollutants in Urban Areas,                                    EPA-454/R-99-021, Wordperfect (267KB,ZIP)     appendia             These three .zip files contain all figures for the      appendib                appendices in the UATW2 document.      appendic    UATEXAMPLE       Example Application of Modeling Toxic Air Pollutants                                    in Urban  Areas, EPA-452/R-02-003                                 This document is available from NTIS (PB# PB2002-108218)                                    by calling (800) 553-6847.                                  (In preparing this document, it was necessary to revise and update the                                   techniques described in "Dispersion Modeling of Toxics Pollutants in                                   Urban Areas", EPA-454/R-99-021 and incorporate techniques developed                                   in "A Simplified Approach for Estimating Secondary Production of                                   Hazardous Air Pollutants (HAPS) Using the OZIPR Model",                                   EPA-454/R-99-054.)

OZONE/Particulate Matter

DRAFT-PM           Draft "Guideline for Demonstrating Attainment of Air                                     Quality Goals for PM2.5 and Regional Haze".

FUGDUST             Modeling Fugitive Dust, Phase I, II & III                                   12/9/96  Wordperfect 5.1 (692KB,ZIP)

ADDWOE1H         Guidance for Improving Weight of Evidence Through                                    Identification of Additional Emission Reduction,                                   Not Modeled. (56KB,WPD)

MCRGUIDE           Mid-Course Review Guidance for the 1-hour Ozone                                  Nonattainment Areas that Rely on Weight-of-evidence                                  for Attainment Demonstrations. (4/4/02)

EAC-OZONE            Frequently Asked Questions on Implementing the DRAFT 8-Hour                                   Ozone Modeling Guidance to Support Attainment Demonstrations                                   for Early Action Compact (EAC).  (Updated:2/23/04)

DRAFT8HR            Draft guidance for 8-hr Ozone NAAQS.  WP 6 (742KB,ZIP)     ----> Guidance document ONLY in PDF

O3TEST                Guidance on Use of Modeled Results to Demonstrate                                      Attainment of 1-hr Ozone NAAQS.  WP 6 (637KB,ZIP)

UAMIVGUIDE        Urban Airshed Model Guidance (UAM-IV),4 documents included.                                     UAMREG: Regulatory Applications                                     UAMEMIS: Emissions/Model Related Issues                                     UAMCRIT: Criteria for assessing the role of                                                           transported ozone/precursors                                     UAMRTPRQ: Reporting requirements for                                                               attainment demonstration                                     Wordperfect 5.1(125KB,ZIP)

CARBON MONOXIDE

COGUIDE             CO Guideline for Roadway Intersections(86KB,ZIP)

MODEL EVALUATION

MODLEVAL          Model Evaluation Protocol(124K,ZIP)

Model Clearinghouse 
Listed in this section are memos and reports related to the Model Clearinghouse.

Also available is The Model Clearinghouse Information Storage and Retrieval System (MCHISRS), an electronic data base system, designed to help record information about referrals and discussions from EPA Regional Offices involving the interpretation of modeling guidance for specific regulatory applications.

Please Note:   The link to the MCHISRS system is not available at this time due to security restrictions.  Work is in progress to resolve certain security issues.  When resolved, this message will be deleted.

Please click HERE to access the online MCHISRS system.  Updates to the system will be noted in 'WHAT'S NEW' as they become available.

Topics for Review and Comment

 
Listed in this section are Topics for Review and Comment.

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