Q-2, r. 38 - Regulation respecting the quality of the atmosphere

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91. (Replaced, O.C. 501-2011)Copper smelting plants: A copper smelting plant must not emit into the atmosphere:
(a)  more sulfur dioxide than the quantities prescribed in the following table:

Category of Plant Quantity of Sulfur Dioxide


existing plant using a • from 1989: 65% of total
continuous reactor annual emissions in 1980*

• from 1990: 50 % of total
annual emissions in 1980*

any other existing plant 275 kg/tonne of dry concentrate
introduced into the process

any new plant 5%, in the form of sulfur
dioxide, of the sulfur
contained in the concentrate,
flux, fuels and other matters
introduced into the process

* as indicated in the document entitled Le point sur
l’action du Québec en matière de précipitations acides
published by the Ministère de l’Environnement du Québec
in March 1984.
An existing copper smelting plant using a continuous reactor must not, during any day in a calendar year, emit a quantity of sulfur dioxide that results, in that calendar year, in exceeding the annual allowable standard or in increasing any excess.
Gases from a continuous reactor, in the case of an existing copper smelting plant using this process, and gases from converters, in the case of any other existing copper smelting plant, must be piped into a treatment system designed to eliminate at least 96% of the sulfur dioxide contained in such gases. An existing copper smelting plant that, on 9 March 1985, is not equipped with a sulfur dioxide treatment system must be so equipped in 1989.
Where gases from the continuous reactor of an existing copper smelting plant are discharged into the atmosphere without being treated, the plant must emit no more than 1 000 tonnes of sulfur dioxide into the atmosphere during any 24-hour period. This standard applies where the discharge of gases extends beyond 3 hours, and it must continue to apply for a period of 24 consecutive hours, including the first 3 hours during which gases are discharged.
When a period of application of the standard begins to run, it applies even if the discharge of gases ceases before the end of the 24-hours period;
(b)  more than 0.75 kg of particulate matter per tonne of crude concentrate on a dry basis for a new copper smelting plan.
R.R.Q., 1981, c. Q-2, r. 20, s. 91; O.C. 240-85, s. 6; O.C. 501-2011, s. 215.