comparable to assessments conducted for other criteria pollutants, while other aspects will differ
15due to the issues identified earlier.
17II.4 Assessment Cases
18To support the process shown in Figure II-1, the EPA is proposing four different
19“assessment” cases shown in Table II-1 that define what air quality analyses, if any, an applicant
20would conduct to demonstrate compliance with the PM2.5 NAAQS (annual and 24-hour).
The four assessment cases presented in Table II-1 include:
6• For “Case 1—No Air Quality Analysis,” if direct PM2.5 emissions are less than
7the SER of 10 tpy and both NOx and SO2 emissions are individually less than the
8SER of 40 tpy, then no compliance demonstration is required.
9• For “Case 2—Primary Air Quality Impacts Only,” if the direct PM2.5 emissions
10are greater than the SER of 10 tpy and both NOx and SO2 emissions are
11individually less than the SER of 40 tpy, then a PM2.5 compliance demonstration
12is required for only the direct PM2.5 emissions based on dispersion modeling and
13no account for impacts of precursor emissions from the project source is
15• For “Case 3—Primary and Secondary Air Quality Impacts,” if the direct PM2.5
16emissions are greater than the SER of 10 tpy and either NOx or SO2 precursor
17emissions are greater than their respective SERs of 40 tpy, then a PM2.5
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castellano: DISPER CUSTIC DESCAR RADIA italiano:
deutsch: DIS CUS DES RAD
castellano: DIS CUS DES RAD english: DIS CUS DES RAD
português: DIS CUS DES RAD italiano: DIS CUS DES RAD
français: DIS CUS DES RAD