Screening procedure to evaluate air pollution effects on Class I wilderness areas. Forest Service general technical report (Final)

The screening procedure is intended to help wilderness managers conduct Adverse impact determinations as part of Prevention of Significant Deterioration (PSD) applications for sources that emit air pollutants that might impact class I wildernesses. The process provides an initial estimate of susceptibility to critical loadings for sulfur, nitrogen, and ozone. It also provides a basis for requesting necessary additional information where potential adverse impacts are identified.