q-2, r. 48 - Regulation respecting hot mix asphalt plants

Updated to 1 June 2024

This document has official status.

chapter Q-2, r. 48

Regulation respecting hot mix asphalt plants

Environment Quality Act

(chapter Q-2, s. 95.1).

Act respecting certain measures enabling the enforcement of environmental and dam safety legislation

(chapter M-11.6, ss. 30 and 45).

R.R.Q., 1981, c. Q-2, r. 25; I.N. 2019-12-01; S.Q. 2022, c. 8, s. 1.

DIVISION I INTERPRETATION

1. Definitions: In this Regulation, unless the context indicates otherwise,

(a)  “importunate frequency band” means 1 or 2 contiguous octaves for which the level or levels obtained by octave band analysis using the method prescribed in Schedule A, between 31.5 and 8,000 Hz, exceed the NR curve which envelops the spectrum of other frequency bands by at least 4 dB;

(b)  “impact noise” means any noise made by mechanical shocks of solid bodies or by impulses;

(c)  “information bearing noise” means any noise in which a melody or words may be distinguished;

(d)  “dB” means a non-dimensional unit used to express the logarithmic ratio between a measured value and a reference value which, when applied to noise, is established in accordance with section 3 of publication No. 179 (second edition, 1973) of the Central Office of the International Electrotechnical Commission;

(e)  “dBA” means the value of the overall sound pressure level measured on the A scale established in accordance with the standards and methods prescribed in publication No. 179 (second edition, 1973) of the Central Office of the International Electrotechnical Commission;

(f)  “application” means an application for an authorization for a hot mix asphalt plant made under section 22 of the Act;

(g)  “existing” means a plant that was already in operation or use in Québec before 28 November 1979;

(g.1)  “post-consumer asphalt shingle fines” means residual materials composed essentially of gravel and bituminous asphalt from asphalt shingles at the end of their useful life;

(h)  “dwelling” means any structure intended for lodging human beings and provided with a water supply and a waste water disposal system connected to the ground;

(i)  “Act” the Environment Quality Act (chapter Q-2);

(j)  “suspended matter” means any substance in suspension in a liquid or on its surface which may be retained by a glass fibre filter equivalent to Reeve Angel No. 934AH paper;

(k)  “particulate matter” means any substance other than uncombined water that exists in a finely divided form as a liquid or a solid in suspension in a gaseous medium;

(l)  “emission period” means a period of emission during which the intensity of the sound produced exceeds, at the point of measurement, the sum of the standard prescribed in section 8 and the attenuation between the point of measurement and the evaluation point;

(m)  “evaluation point” means a place chosen for determining the intensity of the noise produced by a hot mix asphalt plant;

(n)  “point of measurement” means a place where a microphone is placed to measure a noise;

(o)  “stream” means a small natural watercourse flowing all year long;

(p)  “Minister” means the Minister of Sustainable Development, Environment and Parks;

(q)  “hot mix asphalt plant” means an establishment in which a homogeneous product commonly referred to as “asphalt”, and intended mainly for the coating of roads, is manufactured from bituminous asphalt and other aggregate material.

R.R.Q., 1981, c. Q-2, r. 25, s. 1; I.N. 2019-12-01; O.C. 1463-2022, s. 1.

2. The definitions contained in the Act apply to this Regulation.

R.R.Q., 1981, c. Q-2, r. 25, s. 2.

3. Rules of interpretation: The Interpretation Act (chapter I-16), with the necessary modifications, applies to this Regulation.

R.R.Q., 1981, c. Q-2, r. 25, s. 3.

DIVISION II USE OF POST-CONSUMER ASPHALT SHINGLE FINES

R.R.Q., 1981, c. Q-2, r. 25, Div. II; I.N. 2019-12-01; O.C. 871-2020, s. 1; O.C. 1463-2022, s. 2.

4. Post-consumer asphalt shingle fines may be used as raw material for the production of asphalt in a hot mix asphalt plant when

(1)  the plant was modified to use the material; and

(2)  the material is introduced in the recycled materials entry zone or the mixing zone.

R.R.Q., 1981, c. Q-2, r. 25, s. 4; I.N. 2019-12-01; O.C. 871-2020, s. 1; O.C. 1463-2022, s. 2.

5. Post-consumer asphalt shingle fines used by a hot mix asphalt plant for the production of asphalt must originate from a site that is authorized to treat post-consumer asphalt shingles, have previously been treated and be free from asbestos.

R.R.Q., 1981, c. Q-2, r. 25, s. 5; S.Q. 2017, c. 4, s. 267; I.N. 2019-12-01; O.C. 871-2020, s. 1; O.C. 1463-2022, s. 2.

5.1. The quantity of post-consumer asphalt shingle fines used for the production of asphalt may not be greater than 5% of the total mass of the finished product.

O.C. 1463-2022, s. 2.

DIVISION III SITING STANDARDS

6. (Revoked).

R.R.Q., 1981, c. Q-2, r. 25, s. 6; I.N. 2019-12-01; O.C. 871-2020, s. 2.

7. (Revoked).

R.R.Q., 1981, c. Q-2, r. 25, s. 7; O.C. 684-2013, s. 1.

8. Zoning: It is prohibited to build or install a hot mix asphalt plant, or have areas for the loading, unloading or discharge of aggregate materials used for the needs of such plant, in any territory zoned by the municipal authorities for residential, commercial or mixed purposes (commercial-residential) and less than 300 m from that territory.

R.R.Q., 1981, c. Q-2, r. 25, s. 8.

9. Minimum distances: Any hot mix asphalt plant built or installed after 28 November 1979, as well as areas for the loading, unloading, and discharge of aggregate materials used for the needs of such a plant, must be situated at a minimum distance of 150 m from any dwelling, unless the dwelling is owned by or rented to the owner or operator of the hot mix asphalt plant.

The distance standards established in this section apply, with the necessary modifications, between the hot mix asphalt plant and any school or other educational institution, place of worship, campground or any institution to which the Act respecting health services and social services (chapter S-4.2) applies or within the meaning of the Act respecting health services and social services for Cree Native persons (chapter S-5).

R.R.Q., 1981, c. Q-2, r. 25, s. 9.

10. Noise: A hot mix asphalt plant as well as the area for the loading, unloading and discharge of aggregate materials used for the needs of such a plant may nevertheless be situated at a distance that is less than the distance prescribed in sections 8 and 9 if the operator submits in support of his application an estimate of the maximum level of the noise that will be emitted into the environment by the operation of the hot mix asphalt plant and if the noise measured at the boundary of the residential, commercial or mixed zone referred to in section 8 or of the structure or immovable referred to in section 9 does not exceed 40 dBA between 6:00 p.m. and 6:00 a.m. and 45 dBA between 6:00 a.m. and 6:00 p.m. Those estimates must not include the noise emitted by the hot mix asphalt transport trucks.

Where the Minister has granted an authorization for a hot mix asphalt plant on the strength of an application supported by a noise estimate in accordance with this section, the operator of the hot mix asphalt plan must comply with the noise standards established in the first paragraph during the entire operation of the plant.

R.R.Q., 1981, c. Q-2, r. 25, s. 10; I.N. 2019-12-01.

11. Method: For the purposes of section 10, noise is evaluated in accordance with the measurement method prescribed in Schedule B.

R.R.Q., 1981, c. Q-2, r. 25, s. 11.

12. Replacement of and increase in production: Sections 8 and 9 do not apply where a hot mix asphalt plant is enlarged, where its nominal capacity of production is increased, or where a new permanent plant is installed adjacent to or in replacement of an existing hot mix asphalt plant. In all those cases, the plant must, however, be located at the same place as before or at a greater distance from any residential, commercial or mixed zones referred to in section 8 and from any structure or immovable referred to in section 9, except where the hot mix asphalt plant is located beyond the distance standards prescribed in those sections.

However, if the hot mix asphalt plant has already been granted an authorization on the strength of an application supported by a noise estimate in accordance with section 10, the operator must submit a new noise estimate to the Minister and comply with section 10 unless the new location itself complies with sections 8 and 9.

R.R.Q., 1981, c. Q-2, r. 25, s. 12; I.N. 2019-12-01.

13. Hydrous environment: Any hot mix asphalt plant built or installed after 28 November 1979, as well as the areas for the loading, unloading and discharge of aggregate materials and the settling basins used for the needs of such a plant, must be located at a minimum distance of 60 m from any stream, river, sea, swamp or sandbank and at a minimum distance of 300 m from any natural lake.

This section does not apply where a hot mix asphalt plant is built on the location of a pit or quarry that is itself located within the distance standards provided for in the first paragraph and for which an authorization is issued pursuant to section 22 of the Act after the presentation of an environmental impact study in accordance with any regulation of the Government pertaining to that subject.

R.R.Q., 1981, c. Q-2, r. 25, s. 13; I.N. 2019-12-01; O.C. 871-2020, s. 3.

14. Public highway: Any hot mix asphalt plant built or installed after 28 November 1979, as well as the areas for the loading, unloading and discharge of aggregate materials, must be located at a minimum distance of 35 m from a public highway.

R.R.Q., 1981, c. Q-2, r. 25, s. 14.

DIVISION IV WATER POLLUTION CONTROL

15. Concentration of contaminants: The water discharged into the environment through the operation of a hot mix asphalt plant must not contain a concentration of contaminant that exceeds:

(a)  2 mg/L of petroleum hydrocarbons (C10-C50);

(b)  50 mg/litre of suspended matter.

Water that has been in contact with post-consumer asphalt shingle fines must be collected so that that water is not discharged into the environment.

R.R.Q., 1981, c. Q-2, r. 25, s. 15; O.C. 1463-2022, s. 3; O.C. 994-2023, s. 1.

16. pH: The pH of water discharged into the environment through the operation of a hot mix asphalt plant must be between 6 and 9.5.

R.R.Q., 1981, c. Q-2, r. 25, s. 16; O.C. 994-2023, s. 2.

17. Methods of analysis: The water samples taken to ensure the enforcement of sections 15 and 16 must be sent, for analysis, to a laboratory accredited by the Minister under section 118.6 of the Act.

R.R.Q., 1981, c. Q-2, r. 25, s. 17; O.C. 684-2013, s. 2.

DIVISION V AIR POLLUTION CONTROL

18. Equipment: The dryer, bucket-elevator, screens, mixing and weigh hoppers, and the various transfer points of the aggregate material of a hot mix asphalt plant shall be confined in an enclosed area and equipped with exhaust ducts leading to dust collectors designed to comply with the emission standards prescribed in Schedule C.

R.R.Q., 1981, c. Q-2, r. 25, s. 18.

19. Emission standards: Particulate matter emitted into the atmosphere by a hot mix asphalt plant must in no case exceed the quantities determined in Schedule C, depending on the applicable rate of production. When the rate of production is between 2 consecutive levels in Schedule C, the emission standard is determined by linear interpolation. Any existing hot mix asphalt plant that is enlarged or that increases its rate of production must comply with the emission standards applicable to new hot mix asphalt plants in accordance with Schedule C.

In addition, the concentration of contaminants issued into the atmosphere by a hot mix asphalt plant must be such that it does not exceed 20% opacity in accordance with one of the methods of measurement prescribed in the second paragraph of section 20.

R.R.Q., 1981, c. Q-2, r. 25, s. 19.

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.

21. Existing hot mix asphalt plants: Any existing hot mix asphalt plant must, as of 1 January 1980, comply with the emission standards applicable to new hot mix asphalt plants in accordance with the terms of Schedule C.

R.R.Q., 1981, c. Q-2, r. 25, s. 21.

22. Stack: Where the Minister exercises the powers provided for in the third paragraph of section 114 of the Act and orders the installation of a stack to permit the sampling of contaminants emitted by a hot mix asphalt plant, the height of such stack shall be equal to 10 times its interior diameter measured on a straight section proceeding from any bend or any other point of disturbance of gas to the emission of such gas into the atmosphere.

R.R.Q., 1981, c. Q-2, r. 25, s. 22; I.N. 2019-12-01.

23. Recovered dust: Dust recovered by dust collector systems must be handled and transported in such a way that there will be no loss of dust into the atmosphere visible more than 2 m from the source of emission. Where the dust is not recycled, it must be stored, deposited or eliminated on the ground, provided the required measures are taken to prevent any emission of dust into the atmosphere visible more than 2 m from the source of emission.

R.R.Q., 1981, c. Q-2, r. 25, s. 23.

DIVISION VI MAINTENANCE OF EXTERIOR SURFACES AND STORAGE

R.R.Q., 1981, c. Q-2, r. 25, Div. VI; O.C. 1463-2022, s. 4.

24. Access roads: Dust emissions from private access roads and traffic areas used for the needs of a hot mix asphalt plant must be controlled by paving and cleaning the surfaces or by applying a dust control product.

R.R.Q., 1981, c. Q-2, r. 25, s. 24.

25. Piles of aggregate materials: When dust emissions from piles of aggregate material produce one of the effects enumerated in the second paragraph of section 20 of the Act, the operator of the hot mix asphalt plant must take the required measures to prevent the emissions so that the effects disappear.

R.R.Q., 1981, c. Q-2, r. 25, s. 25.

25.0.1. Post-consumer asphalt shingle fines must be stored in a way that protects them from the elements, on a concrete-covered or bituminous concrete-covered surface.

O.C. 1463-2022, s. 5.

DIVISION VI.1 MONETARY ADMINISTRATIVE PENALTIES

O.C. 684-2013, s. 3.

25.1. A monetary administrative penalty of $250 in the case of a natural person or $1,000 in other cases may be imposed on any person who fails to submit a new noise estimate to the Minister in the case provided for in the second paragraph of section 12.

O.C. 684-2013, s. 3.

25.2. A monetary administrative penalty of $500 in the case of a natural person or $2,500 in other cases may be imposed on any person who fails

(1)  to comply with the location standards prescribed in the first paragraph of section 12 in the cases provided for therein;

(2)  to send, for analysis, to an accredited laboratory the water samples referred to in section 17 in accordance with that section;

(3)  to meet the conditions relating to the equipment of a hot mix asphalt plant provided for in section 18;

(4)  to comply with the methods of measurement prescribed by section 20;

(5)  to comply with the height prescribed by section 22 for a stack referred to therein;

(6)  to control dust emissions referred to in section 24 by the means prescribed therein;

(7)  to comply with the storage conditions provided for in section 25.0.1.

O.C. 684-2013, s. 3; O.C. 1463-2022, s. 6.

25.3. A monetary administrative penalty of $750 in the case of a natural person or $3,500 in other cases may be imposed on any person who uses or installs equipment referred to in section 27 that is not in good working order or who uses, during production hours, such equipment that is not working optimally, in contravention of that section.

O.C. 684-2013, s. 3.

25.4. A monetary administrative penalty of $1,000 in the case of a natural person or $5,000 in other cases may be imposed on any person who

(1)  (paragraph revoked);

(1.1)  fails to comply with the conditions for the use of post-consumer asphalt shingle fines prescribed by paragraph 1 of section 4;

(2)  builds or installs a hot mix asphalt plant, or has areas for the loading, unloading or discharge of aggregate materials used for the needs of such plant, less than 300 m from a territory referred to in section 8, in contravention of that section;

(3)  fails to comply with the location standards prescribed by section 9, 13 or 14 on the conditions provided for in those sections.

O.C. 684-2013, s. 3; I.N. 2019-12-01; O.C. 871-2020, s. 4; O.C. 1463-2022, s. 7.

25.5. A monetary administrative penalty of $1,500 in the case of a natural person or $7,500 in other cases may be imposed on any person who builds or installs a hot mix asphalt plant, or has areas for the loading, unloading or discharge of aggregate materials used for the needs of such plant, in a territory referred to in section 8, in contravention of that section.

O.C. 684-2013, s. 3.

25.6. A monetary administrative penalty of $2,000 in the case of a natural person or $10,000 in other cases may be imposed on any person who

(0.1)  fails to comply with the conditions for the use of post-consumer asphalt shingle fines prescribed by paragraph 2 of section 4;

(0.2)  uses post-consumer asphalt shingle fines that do not meet the requirements prescribed by section 5;

(0.3)  uses a quantity of post-consumer asphalt shingle fines that exceeds the quantity prescribed by section 5.1;

(1)  fails to comply with the noise standards referred to in the second paragraph of section 10 in the case or on the conditions provided for in that section or in the second paragraph of section 12;

(2)  discharges water into the environment that does not meet the emission standards prescribed by subparagraph a or b of the first paragraph of section 15 or section 16;

(2.1)  fails to collect water that has been in contact with post-consumer asphalt shingle fines as provided for in the second paragraph of section 15;

(3)  emits into the atmosphere particulate matter that does not meet the emission standards prescribed by the first paragraph of section 19 or the opacity standards prescribed by the second paragraph of that section;

(4)  fails to take the measures prescribed by section 23 so as to ensure that no loss of dust into the atmosphere is visible more than 2 m from the source of emission;

(5)  fails to take the measures required to prevent the dust emissions referred to in section 25.

O.C. 684-2013, s. 3; O.C. 1463-2022, s. 8.

DIVISION VI.2 PENAL SANCTIONS

O.C. 684-2013, s. 3.

25.7. Every person who fails to submit a new noise estimate to the Minister in the case provided for in the second paragraph of section 12 commits an offence and is liable, in the case of a natural person, to a fine of $1,000 to $100,000 or, in other cases, to a fine of $3,000 to $600,000.

O.C. 684-2013, s. 3.

25.8. Every person who contravenes the first paragraph of section 12, section 17, 18, 22, 22, 24 or 25.0.1 commits an offence and is liable, in the case of a natural person, to a fine of $2,500 to $250,000 or, in other cases, to a fine of $7,500 to $1,500,000.

O.C. 684-2013, s. 3; O.C. 1463-2022, s. 9.

25.9. Every person who contravenes section 27 commits an offence and is liable, in the case of a natural person, to a fine of $4,000 to $250,000 or, in other cases, to a fine of $12,000 to $1,500,000.

O.C. 684-2013, s. 3.

25.10. Every person who

(1)  contravenes paragraph 1 of section 4, section 9, 13 or 14,

(2)  builds or installs a hot mix asphalt plant, or has areas for the loading, unloading or discharge of aggregate materials used for the needs of such plant, less than 300 m from a territory referred to in section 8, in contravention of that section,

(3)  (paragraph revoked).

commits an offence and is liable, in the case of a natural person, to a fine of $5,000 to $500,000 or, despite article 231 of the Code of Penal Procedure (chapter C-25.1), to a maximum term of imprisonment of 18 months, or to both the fine and imprisonment, or, in other cases, to a fine of $15,000 to $3,000,000.

O.C. 684-2013, s. 3; O.C. 871-2020, s. 5; O.C. 1463-2022, s. 10.

25.11. Every person who builds or installs a hot mix asphalt plant, or has areas for the loading, unloading or discharge of aggregate materials used for the needs of such plant, in a territory referred to in section 8, in contravention of that section, commits an offence and is liable, in the case of a natural person, to a fine of $8,000 to $500,000 or, despite article 231 of the Code of Penal Procedure (chapter C-25.1), to a maximum term of imprisonment of 18 months, or to both the fine and imprisonment, or, in other cases, to a fine of $24,000 to $3,000,000.

O.C. 684-2013, s. 3.

25.12. Every person who

(1)  contravenes paragraph 2 of section 4, section 5, 5.1, the second paragraph of section 10 or section 15, 16, 19, 23 or 25;

(2)  fails to comply with the noise standards referred to in the second paragraph of section 10 in the case and on the conditions provided for in the second paragraph of section 12,

commits an offence and is liable, in the case of a natural person, to a fine of $10,000 to $1,000,000 or, despite article 231 of the Code of Penal Procedure (chapter C-25.1), to a maximum term of imprisonment of 3 years, or to both the fine and imprisonment, or, in other cases, to a fine of $30,000 to $6,000,000.

O.C. 684-2013, s. 3; O.C. 1463-2022, s. 11.

25.13. Every person who contravenes any other requirement imposed by this Regulation also commits an offence and is liable, where no other penalty is provided for by this Division or the Environment Quality Act (chapter Q-2), to a fine of $1,000 to $100,000 in the case of a natural person or, in other cases, to a fine of $3,000 to $600,000.

O.C. 684-2013, s. 3.

DIVISION VII FINAL PROVISIONS

26. Plant enlargement and increase in volume of production: Any existing plant which is enlarged or which increases its volume of production after 28 August 1974 is considered to be a new plant for the purposes of sections 18, 19 and 20.

R.R.Q., 1981, c. Q-2, r. 25, s. 26.

27. Obligation: Any equipment used or installed to reduce or prevent the emission of contaminants from the hot mix asphalt plant into the environment must be in good working order at all times and must operate with optimum efficiency during production hours even if the equipment reduces the emission of the contaminants to a level below the standards prescribed in this Regulation.

R.R.Q., 1981, c. Q-2, r. 25, s. 27.

28. (Revoked).

R.R.Q., 1981, c. Q-2, r. 25, s. 28; O.C. 684-2013, s. 4.

29. Agricultural lands: This Regulation applies in a reserved area or an agricultural zone established in accordance with the Act respecting the preservation of agricultural land and agricultural activities (chapter P-41.1).

R.R.Q., 1981, c. Q-2, r. 25, s. 29.

SCHEDULE A

(s. 1)

OCTAVE BAND ANALYSIS

The value retained for each octave is the minimum value during a period of 30 seconds, at the evaluation point. If the hot mix asphalt plant produces a noise during a period that lasts less than 30 seconds, the measurements are taken during the emission period.

Octave band analysis is made in linear dB using the slow response on the sound level meter.

Every octave band analysis is made using a sound level meter and octave band filters that comply with the standards in Schedule B.

R.R.Q., 1981, c. Q-2, r. 25, Sch. A.

SCHEDULE B

(s. 11)

METHOD FOR NOISE MEASUREMENT

The noise level at a hot mix asphalt plant is measured according to the following formula:

where

S = 5 where there are 1 or several predominant frequency bands;

S = 0 where there is no predominant frequency band;

I = 5 where there are 1 or several information-bearing noises;

I = 0 where there is no information-bearing noise;

A = A1 + (A2 - A3) calculated as follows:

A1 = attenuation caused by distance;

d2

A1 = 20 log10 ___;

d1

and

d1 = distance from the hot mix asphalt plant to using the following formula;

d2 = distance from the hot mix asphalt plant to the evaluation point;

A2 = attenuation at the evaluation point caused by a barrier;

A3 = attenuation at the measuring point caused by the same barrier;

LI = equivalent level of impact noise.

Calculation of the arithmetic mean of the maximum energies, during the period of emission of the impact noises produced during the sampling period that are recorded at the point of measurement.

The formula to be used is the following:

where

dBn = maximum noise of the Nth impact noise during its emission period.

m = total number of impacts during the emission period; if the number of impacts is over 720/hour, m equals 720.

Lx = equivalent level of a noise.

Equivalent level of a noise at the point of measurement during its period of emission during a sampling period.

The formula to be used is the following:

where fi = time interval (expressed in a percentage of the sampling period) during which the noise level is less than the limit of class i.

Where the hot mix asphalt plant is not in its period of emission, the corresponding fi is equal to 0.

Li = sound level in dBA corresponding to the average of class i.

The scope of class i must be set at a value equal to or less than 2 dBA and the sampling period must be equal to or less than 0.1 seconds.

For the purposes of this measurement method, the normal sampling period is 60 consecutive minutes. If the sampling lasts less than 60 minutes, an adjustment must be made so that the ratio between the periods of emission and the pause are the same.

All the measurements are made in dBA using the rapid response of the sound level meter. The sound level meter and the octave band filters must comply with the standards prescribed in publications 179 (2nd edition, 1973) and 225 (1st edition, 1966) published by Central Office of the International Electrotechnical Commission.

In this measurement method, the hot mix asphalt plant is considered as including the loading, unloading and discharge areas of aggregate material.

R.R.Q., 1981, c. Q-2, r. 25, Sch. B.

SCHEDULE C

(ss. 18, 19 and 21)

EMISSION STANDARDS FOR PARTICULATE MATTER FROM A HOT MIX ASPHALT PLANT

 ______________________________________________________
|                    |                                 |
|                    |        Emission standards       |
|                    |              (kg/h)             |
|                    |_________________________________|
|                    |                |                |
|  Production rate   |    existing    |   new hot mix  |
| (metric tonnes/h)  |     hot mix    | asphalt plants |
|                    | asphalt plants |                |
|____________________|________________|________________|
|                    |                |                |
|        ≤50         |       23       |       1.5      |
|____________________|________________|________________|
|                    |                |                |
|        100         |       24       |       2.5      |
|____________________|________________|________________|
|                    |                |                |
|        150         |       25       |       3.5      |
|____________________|________________|________________|
|                    |                |                |
|        200         |       26       |       4.7      |
|____________________|________________|________________|
|                    |                |                |
|        250         |       27       |       6.2      |
|____________________|________________|________________|
|                    |                |                |
|        300         |       28       |       7.7      |
|____________________|________________|________________|
|                    |                |                |
|        350         |       29       |       9.2      |
|____________________|________________|________________|
|                    |                |                |
|       ≥400         |        30      |      10.7      |
|____________________|________________|________________|        

R.R.Q., 1981, c. Q-2, r. 25, Sch. C.

SCHEDULE D

(s. 20)

SCALE FOR THE MEASUREMENT OF THE OPACITY OF DUST EMISSION INTO THE ATMOSPHERE

						
						
						

						
						
						
						

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


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

Instructions:

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

(2) Avoid looking toward the sun 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 slit.

(4) Record the scale number that best corresponds to the opacity of the emissions at each observation.

(5) To calculate the opacity of an emission, record shades of opacity from at least 4 observations, using the following formula:

P = NEU at opacity No. 1 X 20%

———————————

number of observations

where P represents the percentage opacity of the emission and NUE the number of equivalent units.

The number of each numbered shade constitutes the same quantity of equivalent units.

R.R.Q., 1981, c. Q-2, r. 25, Sch. D.

REFERENCES

R.R.Q., 1981, c. Q-2, r. 25

O.C. 684-2013, 2013 G.O. 2, 1818

S.Q. 2017, c. 4, s. 267

O.C. 871-2020, 2020 G.O. 2, 2343A

O.C. 1463-2022, 2022 G.O. 2, 3369

O.C. 994-2023, 2023 G.O. 2, 1274