SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT
RULE 431.3 - SULFUR CONTENT OF FOSSIL FUELS
(Adopted May 7, 1976)
(a) A person shall not burn any solid fossil fuel having a sulfur content which will emit more than 0.56 pounds of sulfur dioxide (SO2) per million BTU.
(b) The provisions of this rule shall not apply to:
(1) The burning of solid sulfur compounds in the manufacturing of sulfur or sulfur compounds.
(2) The use of solid fossil fuels in any metallurgical process.
(3) The use of any solid fossil fuel where the gaseous products of combustion are used as raw materials for other processes.
(4) The use of solid fossil fuel to propel or test any vehicle, locomotive, boat, or ship.
(5) The use of a solid fossil fuel with higher sulfur content where process conditions or control equipment remove sulfur compounds from stack gases to the extent that the emission of sulfur compounds into the atmosphere is no greater than that which could be emitted by using a fuel which complies with provisions of this rule.
(c) Solid Fossil Fuel
For the purpose of this rule "Solid Fossil Fuel" means coal, or any form of solid fuel derived from fossil materials, for the purpose of creating useful heat.