Section 202.212 Analysis of Environmental Quality

Section 202

Section 202.212  Analysis of

Environmental Quality

a)         A permit application under this Subpart shall provide a

comparison of the ambient air quality under existing requirements and the

ambient air quality which would exist under the proposed ACS.  This analysis

shall include dispersion modeling based on the best and most appropriate models

for the pollutant and emission sources involved, unless the Agency finds that:

1)         Due to the characteristics of the pollutant and emission

source, dispersion modeling is inappropriate or unnecessary for determining

effects on air quality; or

2)         The location of emission sources included in the ACS are not

more than 250 meters apart, the effective plume height of the emission

increases and decreases are not significantly different and the differences in

the characteristics of the emission sources are not likely to affect ambient

air quality; or

3)         Differences in location, plume height, operating practice, and

other characteristics of the emission sources subject to the ACS are not likely

to significantly affect ambient air quality. An effect on ambient air quality

is significant if it equals or exceeds the levels specified in the following

table:

SIGNIFICANCE LEVELS

Pollutant

Annual

24-Hour

8-Hour

3-Hour

1-Hour

SO

2

1.0 ug/m

3

5 ug/m

3

25 ug/m

3

TSP

1.0 ug/m

3

5 ug/m

3

NO

x

1.0 ug/m

3

CO

0.5 ug/m

3

2 ug/m

3

b)         The applicant shall analyze the air quality impacts resulting

from trades between emission sources, including the impact of emissions which

differ in their qualitative impact on health or the environment.

c)         The analysis shall describe any other impacts on the

environment which may accompany the proposed ACS.