Pennsylvania's broad mining exemption from sales and use tax
also includes an exemption for pollution-control devices that is
less well known than the general exemption for mining equipment.
The pollution-control exemption covers all purchases or use of
equipment, machinery, and supplies used to control, abate or
prevent air, water, or noise pollution generated in mining
operations.1 In fact, in an often-cited decision, the
Pennsylvania Commonwealth Court held that the sales and use tax
exemption for pollution-control devices is very broad.2
In Kelly Run, for example, the court held that bulldozers,
cranes, containers, and a "Trashmaster," were exempt from
tax under the pollution-control exemption.3 The court
stated that the "items are used only to dispose of industrial
wastes, two-thirds of which are hazardous. Since these pieces of
equipment are used as pollution control devices more than half of
the time, [they are] exempt from the sales tax."4
Thus, under the case