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.
April 10, 1989 Prevention of Significant Deterioration (PSD) Applicability to Sulfur Dioxide (SO2) Emissions from Incineration of Total Reduced Sulfur (TRS) 4050
Several questions are asked about PSD applicability to SO2 emissions resulting from
a boiler modification at Union Camp Corporation's Savannah, Georgia Kraft pulp mill.
The issue is whether an increase in emissions of one pollutant at a source is exempt
from PSD review when it results from the addition of an air pollution control device
or a change in the method of operation of the source to reduce emissions of another
pollutant. A memorandum dated July 7, 1986 from OAQPS to Regional Air Directors answers
this issue. It makes clear that the NSPS exemption of certain changes to a source's
emission control systems (and resulting emissions increase) from the inclusion in the
definition of "modification" does not apply to the definition of "modification" under
Notebook Entries: 13.12; 1.10B