Multi-Sector Air Pollutants Regulations — 26.1
Common stack 26.1 (1) A stack test or CEMS test at a common stack may be used to determine the NO x emission intensity for all of the boilers and heaters that share the common stack and are operating during the test. Determination of intensity — only boilers or heaters (2) For the purposes of sections 34 and 36, if the only devices that share a common stack and are operating during a stack test or CEMS test are boilers or heaters, the result of that test applies when determining the NO x emission intensity of each of those boilers or heaters. Determination of intensity — presence of other devices (3) For the purposes of sections 34 and 36, if a boiler or heater shares a common stack with a device to which this Part does not apply and that is operating during the test, the NO x emission intensity of that boiler or heater is determined by the formula (Σ r Q r × E out + Σ u Q u × E out − Σ u Q u × E u ) ÷ Σ r Q r where Q r is the energy, expressed in GJ, of the fuel combusted during the test by the rth boiler or heater; E out is the NO x emission intensity measured during the test, expressed in g/GJ; Q u is the energy, expressed in GJ, of the fuel combusted during the test by the uth device; E u is the manufacturer’s guaranteed NO x emission intensity value, expressed in g/GJ for the uth device or, if the manufacturer has not provided such a guarantee, 26 g/GJ; r is the rth boiler or heater to which this Part applies that is operating at the common stack during the test, where r goes from 1 to n and n is the number of boilers or heaters that meet those criteria; and u is the uth device to which this Part does not apply that is operating at the common stack during the test, where u goes from 1 to n and n is the number of devices that meet those criteria. Reference period (4) For greater certainty, if subsection (2) or (3) applies with respect to section 34, the stack test or CEMS test must have been conducted during the reference period described in subsection 34(1). Initial test or compliance test (5) For the purposes of sections 33 and 38, the NO x emission intensity of a boiler or heater that shares a common stack with any other device is deemed not to exceed the applicable limit set out in section 6, 7, 9 to 11, 13 or 14 if the NO x emission intensity of the common stack does not exceed the limit that is determined by the formula (Σ j (Q j × L j ) + Σ k (Q k × C k ) + Σ u (Q u × E u )) ÷ (Σ j Q j + Σ k Q k + Σ u Q u ) where Q j is the energy, expressed in GJ, of the fuel combusted during the test by the jth boiler or heater; L j is the NO x emission intensity limit, expressed in g/GJ, that applies to the jth boiler or heater; Q k is the energy, expressed in GJ, of the fuel combusted during the test by the kth boiler or heater; C k is the classification NO x emission intensity, expressed in g/GJ, of the kth boiler or heater; Q u is the energy, expressed in GJ, of the fuel combusted during the test by the uth device; E u is the manufacturer’s guaranteed NO x emission intensity value, expressed in g/GJ for the uth device or, if the manufacturer has not provided such a guarantee, 26 g/GJ; j is the jth boiler or heater to which this Part applies that is operating at the common stack during the test and that is required under this Part to meet a NO x emission intensity limit, where j goes from 1 to n and n is the number of boilers or heaters that meet those criteria; k is the kth boiler or heater to which this Part applies that is operating at the common stack during the test but that is not required under this Part to meet a NO x emission intensity limit, where k goes from 1 to n and n is the number of boilers or heaters that meet those criteria; and u is the uth device to which this Part does not apply that is operating at the common stack during the test, where u goes from 1 to n and n is the number of devices that meet those criteria. Redetermination after triggering event (6) When a triggering event described in subsection 37(3