Prevention of air pollution

Code of Federal Regulations, Title 40-Protection of Environment, Chapter 1—Environmental Protection Agency, Appendix L, Example Regulations for Prevention of Air Pollution Emergency Episodes, 1,1 Episode Criteria, pp. 841-842. 

Slates are required to propose implementation plans, SIPs, for tlie prevention of air pollution emergency episodes. Each implementation plan must include a contingency plan, wlrich will outline tlie steps to be taken in tlic event tliat a particular pollutiuit concentration reaches the level at wliich it can be considered to be liarmful. 

If released into the atmosphere, this SO2 reacts with water to form acid rain. A great deal of study is directed toward removing and utilizing the S02 from stack gases and the conversion of the SO2 into sulfuric acid. This source of sulfuric acid has decreased the amount of acid produced by the burning of elemental sulfur and has helped in the prevention of air pollution. 

Under the Clean Air Ac/, Uie states are required to propose implementation plans, SIPs. for the prevention of air pollution emergency episodes. These implementation plans do not apply to all to.xic releases nither. they are directed toward preventing e.xcessive buildup of air pollutants that are known to be harmful to the population and the environment when concentrations exceed certain limits. The compounds affected under the iniplementtition plans are sulfur dioxide, particulate matter, carbon monoxide, nitrogen dioxide, and ozone. Each implementation plan must include a contingency plan, wliich will outline the steps to be taken in the event tluit a particular pollutant concentration reaches the level at which it can be considered to be harmful. 

I. Environmental protection 1 Prevention of air pollution 1.1 Dust-type emissions... 

Beavon, D. K., and Vaell, R. P., 1971, Prevention of Air Pollution by Sulfur Plants, paper presented at the AIChE Eighth Annual Technical Meeting, Southern California Section, April 20. 

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