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U.S.C. or the Federal Transit Laws (July 1, 1998). (Reference 95
document contains background information proper application the
Transportation Conformity Rule.
The FAA Office of Airport Planning and Programming is in the process of developing a Presumed to
This document will provide a list of airport-related projects and actions that FAA believes
meet the criteria of “presumed to conform” to any applicable State Implementation Plan based on the
types and amount(s) of emissions generated.
Further clarification to the following statement (p. 14, 1 sentence) is provided below:
“To determine conformity, applicable pollutant concentrations are computed by dispersion
modeling, combined with background concentrations, and compared with (the) NAAQS for
exceedance.”
The term “applicable” in the above statement denotes that dispersion modeling is not appropriate in all
situations. For example, when the pollutant is not amenable to dispersion modeling (i.e. O ) or when
demonstration of General Conform ty is achieved by showing that the project’s emissions
compatible with (i.e. accounted for within) the SIP. (See the General Conform ty guidance publication
referenced above for addit onal information.)
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AIR QUALITY PROCEDURES FOR CIVILIAN AIRPORTS & AIR FORCE BASES
(THE "AIR QUALITY HANDBOOK")
ADDENDUM (Continued)
2.1.5 (p. 14)
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NAAQS Assessment
Identifies and discusses the conditions, or circumstances, for when this type of assessment should be
considered and conducted.
For clarification, the term “NAAQS Assessment” means comparison to the applicable National Ambient
Air Quality Standards based on the results of atmospheric dispersion modeling.
It should be noted that all areas of the U.S. must comply with the NAAQS and that demonstration of
conformity with these standards is not just reserved for maintenance and non-attainment areas.
For a discuss on of the s x EPA criteria air pollutants, their precursors, and the NAAQS, the reader
should consult Appendix C: Key Pollutants of the Handbook.
For additiona guidance on the application of NAAQS assessment in support of the General
Conformity requirements, see the following publications:
40 CFR Parts 51 and 93, Determining Conform ty of General Federal Actions to State or
Federal Implementation Plans, Final Rule, U.S. EPA, November 30, 1993.
General Conform ty Guidance for Airports – Questions & Answers
Environmental Needs Division and the U.S. EPA OAQPS, Air Quality Strategies & Standards
Division (September 25, 2002).
The reference to “an air quality certificate obtained from the governor” (2 sentence, 3 para., p. 15 of
the Handbook) should be omitted here. The applicability of this requirement is addressed in Section
2.1.6 Governor’s Certificate (Addendum addition) as explained be ow.
Governor’s Certificate (Addendum addition)
This is a new section for the Addendum, not covered previous y in Handbook.
As discussed in Section 1.1.2 (Federal Requirements and Documents – DOT/FAA-Specific
Handbook, the Airport and Airway Improvement Act of 1982 required that for airport projects that
involve a new airport, runway or major runway extension, a letter from the Governor from the state in
which the project is located must be obtained certifying that there is reasonable assurance that the
project will be located, designed, constructed and operated in compliance with applicable air quality
standards. This is no longer required following the passage of H.R. 2115, Vision 100 – Century of
Aviation Reauthorization Act, December 2003.
Hazardous Air Pollutants (HAPs) (Addendum addition)
This is a new section for the Addendum, not covered previous y in Handbook.
The FAA Office of Environment and Energy is undertaking a phased approach to assessing the
relationships between the emissions of hazardous air pollutants (HAPs) and airport-related activities. (In
this case, the terms “air toxics”, “toxic air pollutants” or “TAPs” mean the same as “hazardous air
pollutants” or “HAPs.
The first step in this process is the publication of a resource document entitled “Selected Resource
Materials and Annotated Bibliography on the Topic of Hazardous Air Pollutants (HAPs) Associated with
Aircraft, Airports and Aviation” (July 2003). Based on publicly available information, this report provides
a compendium and summary materials on the following topics:
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