20. Methods of measurement: Particulate matter is measured in accordance with the methods described in the document entitled Standard Reference Methods for Source Testing: Measurement of Emissions of Particulates from Stationary Sources, published by Environment Canada and numbered EPS-1-AP-74-1.
The opacity of contaminant emissions in the atmosphere is measured in accordance with the methods described in the document entitled Standard Reference Methods for Source Testing: Measurement of Opacity of Emissions from Stationary Sources published by Fisheries and Environment Canada in the report numbered EPS-1-AP-75-2 or, in the case of black or grey emission, according to the measurement scale in Schedule D.
R.R.Q., 1981, c. Q-2, r. 25, s. 20.