- WEB EXCLUSIVE
- PE COFFEEHAUS
This rule directs facilities and permitting authorities to combine emissions from plant modifications only when those activities are substantially related. In addition, the final rule specifies that:
- for emissions to be aggregated, changes must have more in common than timing alone or just supporting the plant's overall basic function;
- plant modifications that are separated by three or more years will be presumed not to be substantially related.
Specifically, the EPA withdrew the options for "debottlenecking" that were included in the proposed rule and will take no action on the proposal that would enable emissions decreases to be factored into the first part of the test used to determine whether NSR applies to a facility making a change.