Calculations, rolling averages
 23. (1) On and after July 1, 2024, a person who discharges or causes or permits the discharge of sulphur dioxide into the air from a petroleum facility shall ensure that immediately after a parameter is measured under a provision set out in Column 1 of the Table to this section, the average set out opposite the provision in Column 2 is calculated. (2) An average set out in the following items of the Table to this section is not required to be calculated in respect of the IOL-Nanticoke facility: 1. Items 1 to 4. 2. Item 7, unless the sulphur dioxide conveyed to the air pollution control device contains sulphur dioxide from a general combustion device. (3) An average set out in the following items of the Table to this section is not required to be calculated in respect of the PCLI facility: 1. Item 5. 2. Item 7, unless the sulphur dioxide conveyed to the air pollution control device contains sulphur dioxide from, i. a general combustion device, or ii. a sulphur recovery unit that is associated with an incinerator. 3. Items 8 to 10. TABLE Item   Column 1   Provision   Column 2   Average to be calculated 

  1.   Subparagraph 1 i of subsection 22 (1)   The rolling seven-day and 365-day average concentration of sulphur dioxide at the applicable measurement point in respect of the thermal cracking unit. 

  2.   Subparagraph 1 ii of subsection 22 (1)   The rolling 365-day average concentration of sulphur dioxide at the applicable measurement point in respect of the catalytic cracking unit. 

  3.   Subparagraph 1 iii of subsection 22 (1)   The rolling seven-day and 365-day average concentration of sulphur dioxide at the applicable measurement point in respect of the carbon monoxide boiler. 

  4.   Subparagraph 1 iv of subsection 22 (1)   The rolling 365-day average concentration of sulphur dioxide at the applicable measurement point in respect of the carbon monoxide boiler. 

  5.   Subparagraph 1 v of subsection 22 (1)   The rolling 12-hour average concentration of sulphur dioxide at the applicable measurement point in respect of the incinerator. 

  6.   Subparagraph 1 vi of subsection 22 (1)   The rolling three-hour and 365-day average concentration of sulphur dioxide at the applicable measurement point in respect of the general combustion device. 

  7.   Subparagraph 1 vii of subsection 22 (1)   The rolling average concentration of sulphur dioxide for the applicable averaging period set out in section 12 at the applicable measurement point in respect of the air pollution control device. 

  8.   Paragraph 2 of subsection 22 (1)   The rolling 12-hour average concentration of total reduced sulphur, measured as a concentration of sulphur dioxide, at the applicable measurement point in respect of the sulphur recovery unit. 

  9.   Paragraph 3 of subsection 22 (1)   The rolling 12-hour average concentration of hydrogen sulphide, measured as a concentration of sulphur dioxide, at the applicable measurement point in respect of the sulphur recovery unit. 

  10.   Paragraph 4 of subsection 22 (1)   i.  The rolling 12-hour average concentration of oxygen gas in the air/oxygen mixture supplied to the Claus burner.   ii.  The rolling 12-hour average concentration determined by the formula in section 10 or 15, as applicable. 

  11.   Subparagraph 5 i of subsection 22 (1)   The rolling three-hour average concentration of hydrogen sulphide in the fuel gas at the applicable measurement point in respect of the flare. 

  12.   Subparagraph 5 ii of subsection 22 (1)   The rolling three-hour and 365-day average concentration of hydrogen sulphide in the fuel gas at the applicable measurement point in respect of the carbon monoxide boiler. 

  13.   Subparagraph 5 iii of subsection 22 (1)   The rolling three-hour and 365-day average concentration of hydrogen sulphide in the fuel gas at the applicable measurement point in respect of the general combustion device.