Regulations Limiting Carbon Dioxide Emissions from Natural Gas-fired Generation of Electricity — 15
Multiple CEMS per unit 15 (1) For the purposes of sections 13 and 14, the total quantity of CO 2 emissions from a unit equipped with multiple CEMS is determined by adding together the quantity of emissions measured for each CEMS. Units sharing common stack (2) If a unit is located at a facility where there is one or more other units and a CEMS measures emissions from that unit and other units at a common stack rather than at the exhaust duct of that unit and of each of those other units that brings those emissions to the common stack, then the quantity of emissions attributable to that unit is determined based on the ratio of the heat input of that unit to the total of the heat input of that unit and of all of those other units sharing the common stack in accordance with the following formula: The formula for determining the quantity of emissions attributable to a unit that shares a common emissions stack is the product of the multiplication of E and the quotient of the following two sums: the sum of the product resulting from the multiplication of Quj and HHVuj for each fuel type “j” combusted in that unit “u” during the calendar year and the sum, for each unit “i” that shares a common stack, of the sum of the product resulting from the multiplication of Qij and HHVij for each fuel type “j” combusted during the calendar year. where Q u,j is the quantity of fuel type “j” combusted in that unit “u” during the calendar year, determined (a) for a gaseous fuel, in the same manner as the one used in the determination of V f in the formula set out in paragraph 18 (1)(a) and expressed in standard m 3 , (b) for a liquid fuel, in the same manner as the one used in the determination of V f in the formula set out in paragraph 18 (1)(b) and expressed in kL, and (c) for a solid fuel, in the same manner as the one used in the determination of M f in the formula set out in paragraph 18 (1)(c) and expressed in tonnes; HHV u,j is the higher heating value for each fossil fuel type “j” that is combusted in that unit “u” that is measured in accordance with subsection 14 (2), or in the absence of a measured higher heating value, the default higher heating value, set out in column 2 of Schedule 2, for the fuel type, as set out in column 1; j is the j th fuel type combusted during the calendar year in a unit where “j” goes from the number 1 to y and where y is the number of those fuel types; Q i,j the quantity of fuel type “j” combusted in each unit “i” during the calendar year, determined for a gaseous fuel, a liquid fuel and a solid fuel, respectively, in the manner set out in the description of Q uj ; HHV i,j is the higher heating value for each fossil fuel type “j” that is combusted in that unit “i” that is measured in accordance with subsection 14 (2), or in the absence of a measured higher heating value, the default higher heating value, set out in column 2 of Schedule 2, for the fuel type, as set out in column 1; i is the i th unit, where “i” goes from the number 1 to x, and where x is the number of units that share a common stack; and E is the quantity of CO 2 emissions, expressed in tonnes, from the combustion of all fuels in all the units that share a common stack during the calendar year, measured by a CEMS at the common stack, and calculated in accordance with sections 7.1 to 7.7 of the Reference Method.