North Carolina SO2 Boundary Recommendation
North Carolina SO2 Draft Boundary Options
North Carolina SO2 Design Values from air quality monitoring
SO2 health and background information from the U.S. Environmental Protection Agency (USEPA)
June 22, 2010, USEPA SO2 standard, Final rule
NCDAQ's comments on USEPA's proposed SO2 standard, December 8, 2009
NCDAQ's comments on USEPA's proposed SO2 implementation, June 29, 2012
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