More than an estimated 400,000 citizens in the Philadelphia area suffer from some form of respiratory impairment, which is aggravated by the ozone levels produced on hot summer days. Among the ozone forming pollutants are nitrogen oxides, emitted when coal or gasoline is burned by electric utilities, motor vehicles, and large industrial boilers, as well as organic chemicals that evaporate from gasoline, paints and other consumer products. Controls on the manufacture of industrial coatings, such as bridge and traffic paints. Control of manufacture of Volatile Organic Compound emitting personal care products such as nail polish, hair spray, and deodorant. Controls on emissions from sewage treatment plants and large auto refinishing shops.
Vapor recovery nozzles on gasoline pumps.