SOUTH COAST AIR QUALITY MANAGEMENT DISTRICT
RULE 409 - COMBUSTION CONTAMINANTS
(Adopted May 7, 1976)(Amended August 7, 1981)
A person shall not discharge into the atmosphere from the burning of fuel, combustion contaminants exceeding 0.23 gram per cubic meter (0.1 grain per cubic foot) of gas calculated to 12 percent of carbon dioxide (CO2) at standard conditions averaged over a minimum of 15 consecutive minutes.
The provisions of this rule shall not apply to jet engine test stands and emissions from internal combustion engines.