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Source Review requirements.
B1.4 General Conformity – The following changes should be made to the numbered steps:
The following is in addition:
10. Add PM-2.5 to the list of criteria pollutants.
The following are a reorganization of the steps and should be substituted for items 17 through 22:
Is the proposed project specified in the applicable state implementation plan (SIP) or
is there sufficient emissions budget in the SIP to accommodate the action’s
emissions? If yes, the project conforms, coordinate with the state/local agencies;
proceed to item 23 (conformity determination). If no, continue to item 18.
Were emissions mitigated or offset or the project redesigned to reduce direct,
indirect, or construction/temporary emissions such that the project does conform
with the provisions of the SIP? If yes, proceed to item 23 (conformity determination).
If no, the project must be redefined and reevaluated such that it does conform to the
SIP; or proceed to item 19 or 22.
For the proposed action, were the applicable pollutant concentrations computed by
dispersion modeling?
Were appropriate background pollutant concentrations included in the dispersion
analysis?
Do airport pollutant concentrations, when combined with the background pollutant
concentrations exceed NAAQS? If yes, return to item 18. If no, action conforms
continue to item 23 (conformity determination).
Were local and state air quality agencies and EPA consulted for an alternative
conformity determination? If yes and an alternate approach is successfully
developed, proceed to item 23 (conformity determination). If no, go to item 18
B1.5 NAAQS Analysis – The following changes shou d be made to the numbered steps:
25. Do operational exceed the passenger/activity thresholds
established to indicate a potential need for National Ambient Air Quality Standard
review? If yes, coordinate with the FAA, EPA and other state/local
agencies to verify need and develop approach for NAAQS assessment; proceed to
If no, no further action is required.
26. Change the reference to item 26 to item 27.
27. Coordinate with FAA, EPA and other state/local agencies to verify need for the
dispersion modeling of construction emissions.
Change reference to item 29 to item 30.
AD - 26
AIR QUALITY PROCEDURES FOR CIVILIAN AIRPORTS & AIR FORCE BASES
(THE "AIR QUALITY HANDBOOK")
ADDENDUM (Continued)
i )
ions.
Pollutant 1
0.08 ppm
3) 3)
3)
) 3)
150 ug/m3
50 ug/m3
50 ug/m3
)
150 ug/m3
365 ug/m3
2) 3
2) 3)
1.5 ug/m3
3
Thi th
i 3 .
th
3 .
Appendix C: Key Pollutants (p. C-3)
Discusses the six EPA criteria air pollutants individually and lists the NAAQS.
Particulate matter, one of the six criteria pollutants, is segregated into two size ranges; less than or
equal to 10 m crons in diameter (PM-10 and less than or equal to 2.5 microns in diameter (PM-2.5).
Table C-1 (National Ambient Air Quality Standards (NAAQS) has been updated to include the PM-
2.5 and 8-hr Ozone standards adopted by the U.S. EPA in 1997. However, EPA has delayed
designating attainment and nonattainment areas for the PM-2.5 and 8-hr Ozone until 2004, while
sufficient monitoring data is collected to determine which areas are in nonattainment. The standards
are not effective until EPA finalizes the designat Once an area has been designated as
nonattainment for a pollutant, it will be required to do an environmental assessment on that pollutant
and any other pollutant for which it has been designated as nonattainment (or maintenance).
Averaging Period Standard
8-hour average
Ozone (O
1-hour average 0.120 ppm (235 ug/m
8-hour average 9 ppm (10 mg/
Carbon Monoxide (CO
1-hour average 35 ppm (40 mg
24-hour average
Particulate Matter (PM-10)
Annual arithmetic mean
24-hour average
Particulate Matter (PM-2.5
Annual arithmetic mean
24-hour average
Sulfur Dioxide (SO
Annual arithmetic mean 0.03 ppm (80 ug/m
Nitrogen Dioxide (NO Annual arithmetic mean 0.053 ppm (100 ug/m
Lead (Pb) Annual arithmetic mean
Section C1.1 Ozone (O ) is amended to include the 8-hour NAAQS for ozone, which was
adopted by the U.S. EPA in 1997. s standard is evaluated on the 4 (daily maximum) 8-hour
average per year, averaged over 3 years. As stated above, designations for attainment and
nonattainment areas (based on 2001 to 2003 monitoring data) occurred on April 15, 2004.
Section C1.3 Particulates (PM-10) is amended to include the NAAQS for PM-2.5 that was also
adopted by the U.S. EPA in 1997. The annual standard will be met when the 3-year average of
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