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refined or site-specific emissions inventory, EDMS can be supplemented with emission factors
calculated externally by the user with MOBILE and entered into EDMS.
Reference Manual for additional information
In some cases, motor vehicle trips that occur off the airport may already be accounted for in the
regional Transportation Improvement Plan (TIP). Such occurrences should be verified with the
regional or local transportation planning agency to avoid “double-counting” of these trips in the
airport’s emissions inventory or the State Implementation Plan.
Stationary Sources
Describes airport-related stationary source types.
No changes.
Construction Emissions (Addendum addition
This is a new section for the Addendum, not covered previous y in Handbook.
Construction-related activities are now considered an integral part of the overall assessment of air
quality impacts associated with airport development projects. Typical sources of these emissions
include a wide assortment of both light - and heavy-duty equipment and on- and off-road vehicles.
The exhaust products from this fleet of equipment and vehicles contain a variety of pollutants
including CO, NOx, SOx, particulate matter and hydrocarbons. The movement of earthen soils,
stockpiling of raw materials and disposal of construction debris are also sources of fugitive dust and
smoke.
Although comparatively short-term in duration, construction-related air emissions can have an
impact on both local air quality conditions and on the regional airshed. For this reason, construction
emissions are classifiable as "direct" sources of emissions under the Federal Clean Air Act General
Conform
AD - 13
AIR QUALITY PROCEDURES FOR CIVILIAN AIRPORTS & AIR FORCE BASES
(THE "AIR QUALITY HANDBOOK")
ADDENDUM (Continued)
i
MOBILE6 ), or its
etc.) can be obtained from the EPA
(APi
3.3 (p. 28)
ion Database (FAEED) (6th para.)
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sought.
As a result, these emissions must be quantified and n some cases mitigated in order to meet the
requirements of the General Conformity Rule. As with operational emissions discussed above, the
quantification of construction emissions is conducted with an emission inventory and/or dispersion
modeling analysis.
As discussed in Section 3.3 (Available Models) emission factors for light-duty vehicles (i.e. on-road
cars and trucks) can be obtained from the EPA emissions model (Reference 108
most recent version. Emission factors for heavy-duty equipment (i.e. dump trucks, dozers, graders,
NONROAD emissions model.
Emission factors for unpaved roads, stockpiles and other sources of emissions subject to wind
erosion can be obtained from the EPA publication Compilation of Air Pollution Emission Factors
42) as well as several other sources documented by the regulatory and scientific communities.
Levels of construction activity (including scheduling, types of equ pment, project duration, etc.) are
determined on a case-by-case basis and are derived from good engineering estimates.
Available Models
Identifies and describes sources of airport, motor vehicle, fuel and wind erosion emission factors
including EDMS, EMFAC, FAEED, Mobile5a, PART5, TANKS and WIND.
Note that the EDMS, MOBILE, EMFAC, PART5, TANKS and WIND models are continually updated
and the most recent version should be used (i.e. EDMS 4.1, MOBILE6.0/6.1/6.2, EMFAC2000).
Particulate matter emission factors were based on the PART5 model; however, MOBILE6 now
incorporates particulate emission factors. Because of these updates, the input and output values for
these models may differ from what is described in the Handbook.
The reference to the Emissions Dispersion Modeling System (EDMS) should be updated to read as
follows:
Emissions Dispersion Modeling System (EDMS) – EDMS is the FAA required and the EPA preferred
model for the assessment of aviation-related sources of the EPA-criteria air pollutants and their
precursors.
A more detailed explanation of FAA’s policy on the application and use of EDMS for airport air
quality assessments is provided in Federal Register, Vol. 63, No. 70 (April 13, 1998), Emissions and
Dispersion Modeling System Policy for Airport Air Quality Analysis; Interim Guidance to FAA Orders
1050.1D and 5050.4A, Department of Transportation (DOT), FAA (Reference 100).
EDMS is the current emissions inventory tool supported by FAA, and required for FAA analyses of
aviation sources. The reference to the FAA aircraft Engine Emiss
should be de eted.
Another available model that can be used to deve op, compute and support the airport air quality
analysis is NONROAD, as discussed below:
　
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