11.1.3 Example Regional Haze Application

1. What components of particulate matter appear to have high concentrations on days with

poor visibility?

(Mass associated with SO4 and coarse particulate matter (CM) seem to have the

highest concentrations on most such days).

2. What are typical values for the humidity adjustment factor during the times of year when

most of the days with poor visibility occur?

(Typical values appear to be about “4.0").

3. Does visibility appear to track well among nearby Class I areas?

(Yes, but not always).

4. Does poor visibility seem to occur under any specific meteorological conditions?

(This information is not readily available).

5. Does poor visibility seem to coincide with high observed concentrations of any particular

other pollutant?

 

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