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June 22, 1981 PSD Applicability
4.13
The first step for determining a net
emissions increase is to assess if the
modification itself will cause a
significant increase in any regulated
pollutant. If there will be a
significant increase, the 5-year
contemporaneous time period is triggered
and all creditable increases and
decreases during this period should be
assessed. If after evaluating the
creditable increases and decreases, there
is still a significant increase in
emissions PSD review applies. If the
modification itself will not cause a
significant increase, the contemporaneous
time period is not triggered and PSD
review will not apply.
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