View Rule

View EO 12866 Meetings

Printer-Friendly Version Download RIN Data in XML

EPA/AR

RIN: 2060-AK60

Publication ID: Spring 2005

Title: Revision to the Guideline on Air Quality Models (Appendix W to 40 CFR Part 51): Adoption of a Preferred General Purpose (Flat and Complex Terrain) Dispersion Model and Other Revisions
Abstract: This action would revise the Guideline on Air Quality Models, published as appendix W to 40 CFR part 51. The Guideline provides EPA-recommended models for use in predicting ambient concentrations of pollutants for programs ranging from Prevention of Significant Deterioration (PSD) to State Implementation Plans (SIPs) for controlling air pollution sources. The Guideline fulfills a Clean Air Act mandate for EPA to specify models for air management purposes. This revision would enhance the Guideline by incorporating a new, general-purpose dispersion model called AERMOD, which would replace the existing Industrial Source Complex (ISC3) model in many air-quality assessments, including those involving complex terrain. An earlier version of the AERMOD revision was previously proposed (65 FR 21505, 4/21/2000; see SAN 3470), but not promulgated. In response to public comments received on the April 2000 proposal, we integrated the PRIME downwash algorithm and made other incidental modifications, creating AERMOD (02222). On September 8, 2003, we issued a Notice of Data Availability (NDA) to announce the AERMOD revisions, and to reveal new performance data. Public comments taken for 30 days have now been summarized and Agency responses have been developed that support the intended action. NFR is being finalized.
Agency: Environmental Protection Agency(EPA)	Priority: Substantive, Nonsignificant
RIN Status: Previously published in the Unified Agenda	Agenda Stage of Rulemaking: Final Rule Stage
Major: No	Unfunded Mandates: No
CFR Citation: 40 CFR 51.112 40 CFR 51.160 40 CFR 51.166 40 CFR 52.21
Legal Authority: 42 USC 7410 CAAA 110(a)(2) CAAA 165(e) CAAA 172(a) CAAA 172(c) 42 USC 7601 CAAA 301(a)(1) CAAA 320

Legal Deadline: None

Timetable:

Action	Date	FR Cite
NPRM	04/21/2000	65 FR 21505
Notice of Data Availability	09/08/2003	68 FR 52934
Final Action	08/00/2005

Additional Information: SAN No. 3470.1; Split from RIN 2060-AF01.
Regulatory Flexibility Analysis Required: No	Government Levels Affected: Federal, Local, State, Tribal
Small Entities Affected: No	Federalism: No
Included in the Regulatory Plan: No
Agency Contact: Tom Coulter Environmental Protection Agency Air and Radiation D243-01, Research Triangle Park, NC 27711 Phone:919 541-0832 Email: Coulter.Tom@epa.gov Mark Evangelista Environmental Protection Agency Air and Radiation D243, Washington, DC 20460 Phone:919 541-2803 Email: evangelista.mark@epa.gov