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July 5, 1988 Air Quality Analysis for Prevention of Significant Deterioration (PSD) 6.22
The memo relays a policy decision on the approach
to use to interpret dispersion modeling results to
determine whether a source will cause or
contribute to a violation of NAAQS or PSD
increment. Under this approach, air quality
concentrations are projected throughout the
proposed source's impact area, but do not
automatically cause a source to cause or
contribute to a violation. Instead, where a
modeled violation is predicted, further analysis
is done to determine whether the impact is
significant at the point and time of the modeled
violation.
Notebook Entries: 12.12; 12.13
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