Any new or modified source that emits or has the potential to emit a “significant” amount of any pollutant located in a nonattainment or maintenance area is subject to the offset requirements. These offsets are required to ensure reasonable progress toward attainment of the applicable NAAQS.
Emission Reduction Credits (ERCs) are “bankable” if they are surplus, permanent, quantifiable, and federally enforceable. The baseline for determining ERCs is the State Implementation Plan (SIP) emission limitations in effect at the time the application to construct or modify a source is filed. Therefore, credit for emission offset purposes may be allowed for an existing control that goes beyond the requirements of the SIP.
- 40 CFR 51: Appendix S—Emission Offset Interpretive Ruling
- General Requirements—Definitions (R307-101-2)
- New and Modified Sources in Nonattainment Areas and Maintenance Areas (R307-403)
- Ozone Offset Requirements in Davis and Salt Lake Counties (R307-420)
- PM10 Offset Requirements in Salt Lake County and Utah County (R307-421)
- Guidance for PM2.5 Emission Reduction Credit (ERC) Banking and Offsetting Requirements (2.1 MB)
PM10 and Ozone ERC Registry
- Daggett County (11 KB)
- Davis County (13 KB)
- Duchesne County (11 KB)
- Salt Lake County (16 KB)
- San Juan County (11 KB)
- Utah County (15 KB)
- Weber County (11 KB)