Note: EPA no longer updates this information, but it may be useful as a reference or resource.
Please see www.epa.gov/nsr for the latest information on EPA's New Source Review program.
June 3, 1983 Net Emission Increase
Under PSD 4.24
Sources and control agencies are not
required to aggregate individual changes
below PSD de minimus levels over time.
Although the regulations are unclear,
SSCD's interpretation is that individual
de minimus changes need not be aggregated
because 1) aggregation could impose a
significant resource burden on sources
which may never be subject to PSD, 2)
controls would have minimum air quality
benefit because they would only be
required on the last change, 3) air
quality would be protected because the
changes would consume increment.
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