Q-2, r. 4.1 - Clean Air Regulation

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59. The operator of a fuel burning equipment or an industrial furnace to which one of the cases described in section 58 applies must maintain a record of the origin, quantity, sulphur content and heat content of the heavy fuel oil, coal, coke, or pitch used.
In the case described in subparagraph 3 of the first paragraph of section 58, the operator must also maintain a record indicating for each day of operation the nature, quantity, sulphur content and heat content of each fossil fuel used.
O.C. 501-2011, s. 59.