Mount Adams Wilderness Area |
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Question 3. What are the emissions sources responsible for
haze? |
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Question 3a |
Are there one or more
geographic areas that are often associated with best, typical, and worst
haze days when air is transported across the area on its way to the
visibility-protected FCIAs? |
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Question 3b |
What are the emission characteristics
(from emissions inventories) within transport areas associated with hazy
conditions, and are they consistent with the aerosol components responsible
for the haziness? |
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Question 3c |
What do aerosol characteristics on best,
worst and typical days indicate about emission sources (i.e. source types or
specific sources)? |
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Question 3d |
What can spatial and temporal pattern
analyses indicate about the locations and time periods associated with
sources responsible for haze? |
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Question 3e |
What evidence is there for haze impacts
from urban sources and what are the magnitude and frequency of those impacts
where evident? |
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Question 3f |
What connections can be made between
sample periods with unusual relative species concentrations and the activity
of highly sporadic emission sources (e.g. dust storms & large forest fires),
and how can this be used to estimate the impacts of the sporadic emission
sources? |
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Question 3g |
In light of the results addressing
previous questions (a to f), what can be inferred about the magnitude of
impact from emissions outside of the US, within the US but outside of the
WRAP, and from states outside of the FCIA’s home state? |
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Question 3h |
What refinements to the default natural
visibility levels (Refer to Guidance for Estimating Natural Visibility
Conditions Under the Regional Haze Rule) are justified for any FCIA or group
of FCIAs based on ambient monitoring and emissions data and the technical
literature (i.e. without doing air quality modeling)? |