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

Schedule Disposition versions

2012-09-01

SCHEDULE C

(s. 96)

(Replaced, O.C. 501-2011)

SCALE FOR THE MEASUREMENT OF THE OPACITY OF GRAY OR BLACK EMISSIONS INTO THE ATMOSPHERE

						
						
						

						
						
						
						

No. 1		No. 2		No. 3		No. 4


MICRO-RINGELMANN SCALE
MINISTÈRE DE L’ENVIRONNEMENT
GOUVERNEMENT DU QUÉBEC

Definitions

(1) Select an observation point situated at more than 30 m and less than 400 m from the source of emission.

(2) Avoid looking towards bright sunlight and select an observation angle free of dark objects in the background.

(3) Hold the chart at arm’s length and look at the emission through the slip.

(4) Record the scale number corresponding to the opacity, including the number 0 corresponding to white over white.

(5) To calculate the opacity of an emission record the numbered shades on the scale and use the following formula:

P = NEU at opacity No. 1 X 20 %

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number of observations

where P designates the percentage of opacity of the emissions and NEU designates the number of equivalent units.

The number of each numbered shade constitutes as many equivalent units.

(6) Only one observation is enough for the enforcement of section 10.

R.R.Q., 1981, c. Q-2, r. 20, Sch. C; O.C. 501-2011, s. 215.