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The Air Emission Regulation for the Prevention, Abatement and Control of Air Contaminants is relevant to all ongoing and planned developments in Mississippi. The Regulation sets the maximum amount of permitted emissions of particulate matter from all activities. No person shall cause, permit or allow the emission smoke from a point source into the open air from any manufacturing, industrial, commercial or waste disposal process which exceeds 40% opacity unless it is a Startup operation, which may produce emissions exceeding 40% opacity for up to 15 minutes per startup in any one hour and not exceed 3 startups per day. No person shall cause, allow, or permit the discharge of any point source or emissions, which will obscure someone's view by 40%. For fossil fuel burning the maximum permissible emission of ash and/or particulate matter shall be limited to less than .6 pounds per million BTU for installations less than 10 million BTU per hour heat. For installations equal or greater than 10 million BTU per hour heat input shall not exceed the rate of E = 0.8808 * I-0.1667 where E is the emission rate in pounds per million BTU per hour heat input and I is the heat input in millions of BTU per hour. Emissions from installations equal to or greater than 10,000 million BTU per hour heat input shall not exceed .19 pounds per million BTU per hour heat input. Fuel burning operations utilizing a mixture of combustibles with fossil fuels to produce steam or heat water or any other heat transfer medium through indirect means may be allowed emission rates up to .30 grains per standard dry cubic foot. The amount of sulfur dioxide emissions from fuel burning shall not exceed 4.8 pounds per million BTU heat input. The maximum sulfur dioxide from any fuel-burning unit whose generation capacity is less than 250 million BTU per hours 2.4 pounds per million BTU heat input.