Control of Air Contaminants
13. No person shall store, handle or transport any solid liquid or gaseous material or substance in such manner that an air contaminant is released to the atmosphere. R.R.O. 1990, Reg. 346, s. 13. Appendix 1. In this Appendix, wherever the height of a building or structure is referred to, there shall not be included in calculating such height the height of any flagpole, aerial or stack designed for venting emissions. 2. The concentration of a contaminant at a point of impingement shall be calculated as follows: (a) where the point of impingement is located on the building or structure or is within five metres horizontally of the building or structure on which the point of emission is located, and, (i) the height above grade at the point of emission is less than twice the height of the highest part of the building or structure on which the point of emission is located where the highest part of the building or structure is at a height of not more than twenty metres above grade, (see figures 1 and 2) (ii) the height of the highest part of the building or structure on which the point of emission is located is greater than twenty metres above grade and the point of emission is less than twenty metres above the highest part of the building or structure on which it is located, or (see figure 3) (iii) there is a building or structure upwind from the point of emission such that, a. the height above grade of the building or structure is greater than the height above grade at the point of emission, and b. the building or structure is a horizontal distance of 100 metres or less from the point of emission, (see figures 4 and 5) the following formula shall be applied: (see notes 1 and 2)  Where: K is the half hour average concentration at the point of impingement in micrograms per cubic metre, Q is the rate of emission in grams per second of the contaminant, L is, (i) where the point of impingement is at the same height or higher above grade than the point of emission, the straight line distance in metres between the point of emission and the point of impingement, or (ii) where the point of impingement is lower in height above grade than the point of emission, the product of 1.57 and the straight line distance in metres between the point of emission and the point of impingement. Notes: 1. Where a building or structure adjacent to the building or structure on which the point of emission is located is within five metres of that building or structure, it shall be treated as being part of the building or structure on which the point of emission is located. 2. Where K yields a value greater than the concentration of the contaminant at the point of emission, the concentration of the contaminant at the point of emission shall be deemed to be the value of K. (b) where the point of impingement is a horizontal distance of five metres or more from the building or structure on which the point of emission is located and, (i) the height above grade at the point of emission is less than twice the height of the highest part of the building or structure on which the point of emission is located where the highest part of the building or structure is at a height of not more than twenty metres above grade, (see figures 6 and 7) (ii) the height of the highest part of the building or structure on which the point of emission is located is greater than twenty metres above grade and the point of emission is less than twenty metres above the highest part of the building or structure on which it is located, or (see figure 8) (iii) there is a building or structure upwind from the point of emission such that, 1. the height above grade of the building or structure is greater than the height above grade at the point of emission, and 2. the building or structure is a horizontal distance of 100 metres or less from the point of emission, (see figures 9 and 10) the following formula shall be applied: (see notes 1 and 3)  Where: K is the half hour average concentration of the contaminant at the point of impingement in micrograms per cubic metre Q is the rate of emission in grams per second of the contaminant (see note 2) exp is the exponential function where e = 2.7183 Y is the perpendicular distance in metres between the point of impingement and a vertical plane parallel to the chosen direction of the wind through the wind-oriented centre of the building or structure on which the point of emission is located (see figures 11 and 12) (see notes 4 and 5) Z is the difference in height, in metres, between the point of impingement and the ground level at or beneath the point of impingement H is a function of the height, in metres, above grade of the building or structure on which the point of emission is located F is a factor related to the atmospheric stability of the air 6y is a function which defines the amount of dispersion of the contaminant in a horizontal direction at the point of impingement 6z is a function which defines the amount of dispersion of the contaminant in a vertical direction at the point of impingement Determination of K 1. Two values for K shall be determined using the formula in clause (b). 2. The maximum value obtained for K shall be applied in this Regulation. Value number 1 for K is determined as follows: H is 0.67 times the height, in metres, above grade of the building or structure on which the point of emission is located F is 0.6 6y is determined as follows: where A is the greatest width, in metres, presented to the wind by the building or structure in which the point of emission is located, measured horizontally and perpendicularly to the direction of the wind    (see figure 13) where  is equal to or less than 243.45 calculate  = 6.554 where  is greater than 243.45 calculate  = 4.524 and calculate Xy = G +  where G is the horizontal distance, in metres, between the wind-oriented centre of the building or structure on which the point of emission is located and the line where vertical planes, one through the wind-oriented centre of the building or structure on which the point of emission is located and parallel to the chosen direction of the wind, and the other through the point of impingement, meet at right angles. (see figure 14) (see note 6) where the value of Xy is equal to or less than 2500 calculate 6y = 0.176 Xy0.92445 where the value of Xy is greater than 2500 calculate 6y = 0.268 Xy0.87248 6z is determined as follows: where B is the height above ground in metres of the highest part of the building or structure on which the point of emission is located where  is equal to or less than 141.41 calculate  = 12.027 where  is greater than 141.41 calculate  = 10.418 and calculate Xz = G +  where G has the same value for G as used in the equation Xy = G + Where the value of Xz is equal to or less than 2500 calculate 6z = 0.106 Xz0.91926 where Xz is greater than 2500 calculate 6z = 0.120 Xz0.90564 Value number 2 for K is determined as follows: Where: H is 0.67 times the height in metres above grade of the building or structure on which the point of emission is located F is 0.8 6y is determined as follows: where  has the same value as  determined for value number 1 for K where  is equal to or less than 49.01 calculate  = 10.686 where  is greater than 49.01 and less than 409.32 calculate  = 10.020 where  is equal to or greater than 409.32 calculate  = 6.760 and calculate Xy = G + where G has the same value for G determined for value number 1 for K where the value of Xy is equal to or less than 700 calculate 6y = 0.110 Xy0.93062 where Xy is greater than 700 and less than 7000 calculate 6y = 0.120 Xy0.91837 where Xy is equal to or greater than 7000 calculate 6y = 0.191 Xy0.86538 6z is determined as follows: where B is the vertical height above grade of the highest part of the building or structure on which the point of emission is located where  is equal to or less than 24.64 calculate  =16.524 where  is greater than 24.64 and less than 110.75 calculate  = 4.984 where  is equal to or greater than 110.75 calculate  = 1.090 and calculate Xz = G +  where G has the same value for G determined for value number 1 for K where Xz is equal to or less than 700 calculate 6z = 0.091 Xz0.8553 where Xz is greater than 700 and less than 7000 calculate 6z = 0.352 Xz0.6495 where Xz is equal to or greater than 7000 calculate 6z = 0.955 Xz0.53857 Notes: 1. Where a building or structure adjacent to the building or structure on which the point of emission is located is within five metres of that building or structure, it shall be treated as being part of the building or structure on which the point of emission is located. 2. Where a situation exists as described in subclauses (i), (ii) and (iii) of clause (b) all points of emission of a contaminant shall be considered as if the total emission comes from the building such that the building itself is a point of emission. 3. Where K yields a value greater than the concentration of the contaminant at the point of emission, the concentration of the contaminant at the point of emission shall be deemed to be the value of K. 4. The wind-oriented centre of a building or structure is obtained by circumscribing the plan view of the building or structure with the smallest possible rectangle, two sides of which are parallel to the chosen wind direction, and the intersection of the diagonals of this rectangle is the wind-oriented centre. (see figure 11) 5. Where an emission or emissions is from only one building or structure, the wind direction shall be that direction that is parallel to a line joining the wind-oriented centre of the building or structure and the point of impingement and the value of the exponential expression involving Y is one. (In such a situation the value of Y becomes zero) 6. Where emissions from only one building or structure are being evaluated the wind direction shall be so chosen that the value of G is the horizontal distance in metres between the point of impingement and a vertical line through the wind-oriented centre of the building or structure on which the point of emission is located. (see figure 15) (c) where the point of emission is not affected by any of the conditions described in subclause (i), (ii) or (iii) of clause (a) or subclause (i), (ii) or (iii) of clause (b), the following formula shall be applied: (see figures 16, 17, 18 and 19)  Where: K is the half hour average concentration of the contaminant at the point of impingement in micrograms per cubic metre Q is the rate of emission in grams per second of the contaminant U is the wind speed in metres per second exp is the exponential function where e = 2.7183 Y is the straight line distance in metres between the point of impingement and a vertical plane through the point of emission in the chosen direction of the wind (see figure 20) (see note 3) Z is the difference in height, in metres, between the point of impingement and the ground level at or beneath the point of impingement H is the effective height of the emission of a contaminant F is a factor related to the atmospheric stability of the air 6y is a function which defines the amount of dispersion of the contaminant in a horizontal direction at the point of impingement 6z is a function which defines the amount of dispersion of the contaminant in a vertical direction at the point of impingement Determination of K 1. Two values for K shall be determined using the formula in clause (c). 2. The maximum value obtained for K shall be applied in this Regulation. (see note 1) Value number 1 for K is determined as follows: Where: U is the speed of the wind in metres per second (see note 2) H is determined as follows:  Where: h is the height above grade, in metres, of the point of emission vs is the speed in metres per second in an upward vertical direction of the contaminant gas stream at the point of emission to the atmosphere (see note 4) d is the diameter in metres of a circle of equivalent area to that area through which the contaminant gas stream enters the air u is the speed of the wind in metres per second (see note 5) Ts is the temperature in degrees Kelvin (273° + temperature in Degrees Celsius) of the contaminant gas stream at the point of emission F is 0.6 6y is determined as follows: Calculate X where X is the horizontal distance in metres between the point of emission and the line where vertical planes, one through the point of emission and parallel to the chosen direction of the wind and the other through the point of impingement, meet at right angles. (see figure 21) (see notes 6 and 7) Where the value of X is equal to or less than 2500 6y = 0.176 X0.92445 When the value of X is greater than 2500 6y = 0.268 X0.87248 6z is determined as follows: When the value of X is determined in the calculation of  is equal to or less than 2500 6z = 0.106 X0.91926 When the value of X is greater than 2500 6z = 0.120 X0.90564 (see note 8) Value number 2 for K is determined as follows: H has the same value for H as determined for value number 1 for K F is 0.8 6y is determined as follows: Where X has the same value for X as determined for value number 1 for K Where the value of X is equal to or less than 700 6y = 0.110 X0.93062 Where the value of X is greater than 700 but less than 7000 6y = 0.120 X0.91837 Where the value of X is equal to or greater than 7000 6y = 0.191 X0.86538 6z is determined as follows: Where X has the same value as determined in the calculation of 6y Where X is equal to or less than 700 6z = 0.091 X0.8553 Where X is greater than 700 but less than 7000 6z = 0.352 X0.6495 Where X is equal to or greater than 7000 6z = 0.955 X0.53857 (see note 8) Notes: 1. Where K yields a value greater than the concentration of the contaminant at the point of emission, the concentration of the contaminant at the point of emission shall be deemed to be the value of K. 2. The wind speed shall have a minimum value of 2.235 metres per second and a maximum value of 18.235 metres per second. A value of K shall be determined for wind speed increments of 0.5 metres per second until a maximum value of K is found. 3. Where only a single point of emission is being evaluated the wind direction shall be so chosen that the value of Y becomes zero (therefore the value of exp expression containing Y becomes equal to one). 4. Where the value of vs is less than 7 metres per second the value of vs shall be zero. 5. The value for u shall be consistent with the values substituted directly for u in the equation used for evaluating K. 6. Where a single source of emission is being evaluated, the wind direction shall be so chosen that the value of X shall be the horizontal distance in metres between the point of impingement and a vertical line through the point of emission. (see figure 22) 7. In the calculation of K at ground level, the value of X shall be so chosen that the maximum value of K is found. 8. For each point of impingement, for each wind direction chosen, and for each value of X, U shall be varied until the maximum value of K is found. (d) where the emissions of a contaminant are from more than one source, the contaminant concentrations at the point of impingement, resulting from each individual source, for the conditions set out in clauses (a), (b) and (c) shall be added together to give an aggregate value for K. The aggregate value of K shall be determined for all wind directions and all permissible wind speeds for value of K, where applicable. The largest aggregate K obtained shall be the value of K to apply in this Regulation.                       R.R.O. 1990, Reg. 346, Appendix. SCHEDULE 1  Item

Column 1

Column 2

Column 3


Name of Contaminant

Unit of Concentration

Concentration at Point of Impingement — Half Hour Average


1.

Acetic Acid

Micrograms of acetic acid per cubic metre of air

2,500


2.

Acetylene

Micrograms of acetylene per cubic metre of air

56,000


3.

Acetone

Micrograms of acetone per cubic metre of air

48,000


4.

Acrylamide

Micrograms of acrylamide per cubic metre of air

45


4.1

Acrylonitrile

Micrograms of acrylonitrile per cubic metre of air

180


5.

Ammonia

Micrograms of ammonia per cubic metre of air

3,600


6.

Antimony

Total micrograms of antimony in free and combined form per cubic metre of air

75


7.

Arsine

Micrograms of arsine per cubic metre of air

10


8.

Beryllium

Total micrograms of beryllium in free and combined form per cubic metre of air

0.03


9.

Boron Tribromide

Micrograms of boron tribromide per cubic metre of air

100


10.

Boron Trichloride

Micrograms of boron trichloride per cubic metre of air

100


11.

Boron Trifluoride

Micrograms of boron trifluoride per cubic metre of air

5.0


12.

Boron

Total micrograms of boron in free and combined form per cubic metre of air

100


13.

Bromine

Micrograms of bromine per cubic metre of air

70


14.

Cadmium

Total micrograms of cadmium in free and combined form per cubic metre of air

5.0


15.

Calcium hydroxide

Micrograms of calcium hydroxide per cubic metre of air

27


16.

Calcium Oxide

Micrograms of calcium oxide per cubic metre of air

20


17.

Carbon Black

Micrograms of carbon black per cubic metre of air

25


18.

Carbon Disulphide

Micrograms of carbon disulphide per cubic metre of air

330


19.

Carbon Monoxide

Micrograms of carbon monoxide per cubic metre of air

6,000


20.

Chlorine

Micrograms of chlorine per cubic metre of air

300


21.

Chlorine Dioxide

Micrograms of chlorine dioxide per cubic metre of air

85


21.1

Chloroform

Micrograms of chloroform per cubic metre of air

300


22.

Copper

Total micrograms of copper in free and combined form per cubic metre of air

100


23.

Cresols

Micrograms of cresols per cubic metre of air

230


24.

Decaborane

Micrograms of decaborane per cubic metre of air

50


25.

Diborane

Micrograms of diborane per cubic metre of air

20


26.

Dicapryl Phthalate

Micrograms of dicapryl phthalate per cubic metre of air

100


27.

Dimethyl Disulphide

Micrograms of dimethyl disulphide per cubic metre of air

40


28.

Dimethyl Sulphide

Micrograms of dimethyl sulphide per cubic metre of air

30


29.

Dioctyl Phthalate

Micrograms of dioctyl phthalate per cubic metre of air

100


30.

Dustfall

Micrograms per square metre

8,000


31.

Ethyl Acetate

Micrograms of ethyl acetate per cubic metre of air

19,000


32.

Ethyl Acrylate

Micrograms of ethyl acrylate per cubic metre of air

4.5


33.

Ethyl Benzene

Micrograms of ethyl benzene per cubic metre of air

3,000


33.1

Ethyl Ether

Micrograms of ethyl ether per cubic metre of air

7,000


34.

Ferric Oxide

Micrograms of ferric oxide per cubic metre of air

75


35.

Fluorides, (Gaseous)
(April 15 to October 15)

Micrograms of gaseous, inorganic fluoride per cubic metre of air expressed as hydrogen fluoride

   4.3


36.

Fluorides, (Total)
(April 15 to October 15)

Total micrograms of inorganic fluoride per cubic metre of air expressed as hydrogen fluoride

   8.6


37.

Fluorides, (Total)
(October 16 to April 14)

Total micrograms of inorganic fluoride per cubic metre of air expressed as hydrogen fluoride

   17.2


38.

Formaldehyde

Micrograms of formaldehyde per cubic metre of air

65


39.

Formic Acid

Micrograms of formic acid per cubic metre of air

1,500


40.

Furfural

Micrograms of furfural per cubic metre of air

1,000


41.

Furfuryl Alcohol

Micrograms of furfuryl alcohol per cubic metre of air

3,000


41.1

n-Heptane

Micrograms of n-heptane per cubic metre of air

33,000


42.

Hydrogen Chloride

Micrograms of hydrogen chloride per cubic metre of air

100


43.

Hydrogen Cyanide

Micrograms of hydrogen cyanide per cubic metre of air

1,150


44.

Hydrogen Sulphide

Micrograms of hydrogen sulphide per cubic metre of air

30


45.

Iron (metallic)

Micrograms of metallic iron per cubic metre of air

10


45.1

Isopropyl Benzene

Micrograms of isopropyl benzene per cubic metre of air

100


46.

Lead

Total micrograms of lead in free and combined form per cubic metre of air

6


47.

Lithium Hydrides

Total micrograms of lithium hydrides per cubic metre of air

7.5


48.

Lithium

Total micrograms of lithium in other than hydride compounds per cubic metre of air

60


49.

Magnesium Oxide

Total micrograms of magnesium oxide per cubic metre of air

100


50.

Mercaptans

Total micrograms of mercaptans per cubic metre of air expressed as methyl mercaptans

20


51.

Mercury (alkyl)

Total micrograms of alkyl mercury compounds per cubic metre of air

1.5


52.

Mercury

Total micrograms of mercury in free and combined form per cubic metre of air

5.0


53.

Methyl Acrylate

Micrograms of methyl acrylate per cubic metre of air

4.0


54.

Methyl Alcohol (Methanol)

Micrograms of methyl alcohol per cubic metre of air

12,000


55.

Methyl Chloroform
(1-1-1 Trichloroethane)

Micrograms of methyl chloroform per cubic metre of air

350,000


56.

Methyl Ethyl Ketone 
(2-Butanone)

Micrograms of methyl ethyl ketone per cubic metre of air

30,000


56.1

Methyl Isobutyl Ketone

Micrograms of methyl isobutyl ketone per cubic metre of air

1,200


57.

Methyl Methacrylate

Micrograms of methyl methacrylate per cubic metre of air

860


58.

Milk Powder

Micrograms of milk powder per cubic metre of air

20


58.1

Mineral Spirits

Micrograms of mineral spirits per cubic metre of air

7,800


59.

Monomethyl Amine

Micrograms of monomethyl amine per cubic metre of air

25


60.

Nickel

Total micrograms of nickel in free and combined form per cubic metre of air

5


61.

Nickel Carbonyl

Micrograms of nickel carbonyl per cubic metre of air

1.5


62.

Nitric Acid

Micrograms of nitric acid per cubic metre of air

100


63.

Nitrilotriacetic Acid

Micrograms of nitrilotriacetic acid per cubic metre of air

100


64.

Nitrogen Oxides

Micrograms of nitrogen oxides per cubic metre of air expressed as NO2

500


65.

Ozone

Micrograms of ozone per cubic metre of air

200


66.

Pentaborane

Micrograms of pentaborane per cubic metre of air

3.0


67.

Phenol

Micrograms of phenol per cubic metre of air

100


68.

Phosgene

Micrograms of phosgene per cubic metre of air

130


69.

Phosphoric Acids

Micrograms of phosphoric acids per cubic metre of air expressed as P2O5

100


70.

Phthalic Anhydride

Micrograms of phthalic anhydride per cubic metre of air

100


71.

Propylene Dichloride

Micrograms of propylene dichloride per cubic metre of air

2,400


71.1

Propylene Oxide

Micrograms of propylene oxide per cubic metre of air

450


72.

Silver

Total micrograms of silver in free and combined form per cubic metre of air

3


73.

Styrene

Micrograms of styrene per cubic metre of air

400


74.

Sulphur Dioxide

Micrograms of sulphur dioxide per cubic metre of air

830


75.

Sulphuric Acid

Micrograms of sulphuric acid per cubic metre of air

100


76.

Suspended Particulate Matter
(particulate less than 44 microns in size)

Total micrograms of suspended particulate matter per cubic metre of air

100


77.

Tellurium (except hydrogen telluride)

Micrograms of tellurium in free and combined form per cubic metre of air

30


78.

Tetrahydrofuran

Micrograms of tetrahydrofuran per cubic metre of air

93,000


79.

Tin

Total micrograms of tin in free and combined form per cubic metre of air

30


80.

Titanium

Total micrograms of titanium in free and combined form per cubic metre of air

100


81.

Toluene

Micrograms of toluene per cubic metre of air

2,000


82.

Toluene Di-isocyanate

Micrograms of toluene di-isocyanate per cubic metre of air

1.0


83.

Trichloroethylene

Micrograms of trichloroethylene per cubic metre of air

3,500


84.

Trifluorotrichloro Ethane

Micrograms of trifluoro trichloroethane per cubic metre of air

2.4 million


85.

Vanadium

Total micrograms of vanadium in free and combined form per cubic metre of air

5.0


85.1

Vinylidene Chloride

Micrograms of vinylidene chloride per cubic metre of air

30


86.

Xylenes

Micrograms of xylenes per cubic metre of air

2,300


87.

Zinc

Total micrograms of zinc in free and combined form per cubic metre of air

100 R.R.O. 1990, Reg. 346, Sched.; O. Reg. 795/94, s. 1; O. Reg. 342/01, s. 1.