Q-2, r. 4.1 - Clean Air Regulation

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168. A catalyst regeneration process used in catalytic cracking in a petroleum refinery must not emit into the atmosphere
(1)  particles in a concentration greater than 100 mg/Rm3 of dry gas; and
(2)  carbon monoxide in a concentration greater than 500 ppm of dry gas at reference conditions.
O.C. 501-2011, s. 168.