The primary purpose of this analysis is to identify

regional haze impacts. Plume blight analyses may need to be

performed (EPA, 1988), as well, depending on the location of a

source with respect to the Class I area. For sources located

more than 50 kilometers from a Class I area, the regional haze

analysis will generally be more appropriate. The methods,

outlined in Appendix B, are based upon analysis of ambient,

speciated fine particulate data, correlated with visibility

parameters. Therefore, in order to utilize this method,

concentrations of particulate species need to be obtained. The

MESOPUFF-II model can provide estimates of SO and NO , but = 

4 3

assumptions need to be included with respect to the cations

associated with these radicals in the fine particulate, the

amount of primary carbon particles in the atmosphere, and the

formation of secondary organic particles. These are documented

in Appendix B.

5.2.3 Analysis of Other AQRVs

The modeling system, described herein, will only provide

estimates of the ambient concentrations of pollutants or the

depositional loadings at given locations. This modeling system

is adequate for providing such estimates, which then may be

used to assess the total or incremental impacts of these

concentrations or depositional loadings on aquatic and

terrestrial ecosystems. The methods for estimating effects on

these other AQRVs are not provided; such methods should be

determined in consultation with the appropriate Federal Land

Manager.

5.2.4 Analysis of Primary Emissions of Fine Particulates

The MESOPUFF-II model is not set up to directly simulate

emissions of primary particulates. It can, however, be used

for such an analysis, although it must be run as an independent

 

 

 

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