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discussed in the same environmental document. Actions are
connected if they automatically trigger other actions which
may require an EIS; if they cannot or will not proceed unless
other actions are taken previously or simultaneously; and if
they are interdependent parts of a larger action and depend
on the larger action for their justification.
Control The ability to regulate, in some way, the emissions from a
Federal action. The ability to regulate can be demonstrated
directly through the use of emissions control equipment on a
boiler or indirectly through the implementation of regulation
or conditions in the nature of activity that must be established
in permits of approvals or by design of the action. An
example of indirect control is limiting vehicle emissions by
controlling the size of a parking facility.
Control Strategy A combination of limiting measures designed to achieve the
aggregate reduction of emissions.
Cooperating Agency A cooperating agency may be any Federal agency that has
jurisdiction by law or special expertise with respect to any
potential environment impact involved in a proposal for
legislation or Federal action that significantly affects the
quality of the human environment. A cooperating agency
may also be a state or local agency of similar qualifications
or, when the effects influence a reservation, an Indian Tribe.
By agreement with the lead agency, an Indian Tribe may
become a cooperating agency.
Criteria Pollutants The six pollutants listed in the CAA that are regulated by the
EPA through the NAAQS because of their health and/or
environmental effects. They are: nitrogen dioxide (NO2),
sulfur dioxide (SO2), carbon monoxide (CO), ozone (O3),
particulate matter (PM-10) and lead (Pb).
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Cumulative Impact Impacts on the environment which result from the
incremental impact of the action when added to other past,
present and reasonable foreseeable future actions regardless
of what agency (Federal or no-Federal) or person undertakes
such other actions. Cumulative impacts can result from
individually minor, but collectively significant, actions taking
place over a period of time.
Day Calendar day.
De Minimis So small as to be negligible or insignificant. If an action has
de minimis emissions (Conformity Rule 40 CFR part
93.153c), then a conformity determination pursuant to the
CAA of 1990 is not required.
Description of the Proposed Action and
Alternatives (DOPAA)
The first Air Force document required by the proponent of an
action to initiate the EIAP. The DOPAA is documented with
AF Form 813 and is the basis for all follow-on environmental
analyses.
Diffusion The gradual mixing of molecules of two or more pollutants
as a result of random thermal motion.
Direct Effect An effect that is caused by the implementation and/or
operation of an action that occurs at the same time and place.
These type of effects are also often referred to as primary
effects.
Direct Emissions Direct emissions are those caused by or initiated by the
implementation and/or operation of an action, and that occur
at the same time and place as the action.
Dispersion The process by which atmospheric pollutants disseminate
due to wind and vertical stability.
DOD Department of Defense.
Driving Cycle A profile of velocity versus time, specified for determining
vehicular emission rate. This cycle would include periods of
stopping, acceleration, cruising and deceleration.
Emission Factor The rate at which pollutants are emitted into the atmosphere
by one source or a combination of sources.
Emission Inventory A complete list of sources and rates of pollutant emissions
within a specific area and time interval.
Enplanements The number of passengers on departing aircraft.
Environmental Assessment (EA) A concise public document that provides sufficient data, evidence,
and analysis to determine if Federal agency should prepare an EIS for
an action or issue a FONSI. An EA is not necessary in cases where
the Federal agency has decided to prepare an EIS. An EA can be
prepared at any time to aid agency decision making.
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Environmental Impact Analysis Process
(EIAP)
The Air Force process for complying with NEPA and CEQ
regulations.
Environmental Impact Statement (EIS) An EIS is a detailed, concise public document required for
major Federal actions likely to have significant effects on the
human environment. The document may be directly
prepared, without first doing an EA, if the action will have
significant environmental impacts. An EIS provides the
public and decision makers with clear, written documentation
　
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