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20 September 2011
So in my newsfeed today, an article popped up about Utah petitioning the EPA not to have smoke from July 4th fireworks included in their monitored air pollution (i.e., the amounts that will get you fined if they spike). The article went on to mention that the EPA grants exemptions for spikes in air pollution that result from “exceptional” events, which are defined as follows:
(i) Affects air quality; (ii) Is not reasonably controllable or preventable; (iii) Is an event caused by human activity that is unlikely to recur at a particular location or a natural event; and (iv) Is determined by EPA through the process established in these regulations to be an exceptional event.
These include natural disasters like storms, seismic activity, floods, wildfires and volcanic eruptions, as well as some allowances for air pollution blown in from elsewhere or resulting from terrorism or war.