An upset or breakdown is an unforeseeable failure or malfunction of any air pollution control equipment or related equipment which causes a violation of any emission limit or permit condition, as long as the failure is not the result of neglect, is not intentional, is not the result of improper maintenance, is not a recurring breakdown of the same equipment, and the failure does not create a public nuisance.
The District needs to be notified as soon as reasonably possible, but not later than 2 hours after detection during normal business hours.