Q-2, r. 4.1 - Clean Air Regulation

Section 202 Disposition versions

2023-07-06

202. For the purposes of sections 75, 77, 91, 92, 97, 153 and 197, the concentration of contaminants must be calculated for all the sources of contamination for a point off the limits of the property occupied by those sources and off a sector zoned for industrial purposes, as established by the competent municipal authorities. If the limits of the property occupied by the sources of contamination or the territory thus zoned includes a dwelling or a public institution, the concentration of contaminants must also be calculated for a point within the limits of each of the locations.

A contaminant concentration in the atmosphere includes its initial concentration, the latter being calculated on the basis of the results of sampling carried out or validated for all or part of the 3 preceding years and taken on the sites of all the sources of contamination or in a comparable environment, and that corresponds to the following, according to the period applicable for the limit value concerned:

(1)  for a period less than or equal to 1 hour, the 99th percentile of the data measured during that period;

(2)  for a period greater than 1 hour but less than or equal to 24 hours, the 98th percentile of the data measured during that period;

(3)  for a period greater than 24 hours but less than or equal to 1 year, the average of the hourly or daily data.

If sampling results are not available for the 3 preceding years, the initial concentration is the concentration referred to for that contaminant appearing in column 2 of Schedule G or K, as the case may be.

O.C. 501-2011, s. 202; O.C. 987-2023, s. 6.

2012-09-01

202. For the purposes of sections 75, 77, 91, 92, 97 and 153 and Title IV, the concentration of contaminants must be calculated for a point off the limits of the property occupied by the source of contamination and off a sector zoned for industrial purposes or in a buffer zone adjacent to such a sector, as established by the competent municipal authorities. If the territory thus zoned includes one or more permanent residences, the contaminant concentration must also be calculated for a point within the property limits of each of those residences.

A contaminant concentration in the atmosphere is calculated on the basis of the initial concentration in the results of sampling carried out or validated by the Ministère du Développement durable, de l’Environnement et des Parcs for all or part of the 3 preceding years and taken on the site of the stationary source of contamination or in a comparable environment or, if sampling results are not available for that period, on the basis of the initial concentration for that contaminant appearing in column 2 of Schedule G or K, as the case may be.

Despite the second paragraph, in the case of the calculation of the concentration of fine particles and benzene, the initial concentration corresponds to the 98th percentile of the same sampling results or to the initial concentration for those contaminants appearing in column 2 of Schedule K.

O.C. 501-2011, s. 202.