Multi-Sector Air Pollutants Regulations

Marginal note:Percentage of methane

• 16 (1) The percentage of methane in the gaseous fossil fuel introduced into the combustion chamber of a boiler or heater, for a given hour, must be determined, by volume, as a weighted average by the formula

  [(CH_{4 ng} × Q_ng) + (CH_{4 alt} × Q_alt)] × 100/(Q_ng + Q_alt)

  where

  CH_{4 ng}

  is the concentration of methane, determined in accordance with subsection (2), in the natural gas introduced into the combustion chamber during the given hour, expressed as a decimal fraction;

  Q_ng

  is the quantity of the natural gas introduced into the combustion chamber during the given hour, as measured by a flow meter on the input, expressed in standard m³;

  CH_{4 alt}

  is the concentration of methane, determined in accordance with subsection (2), in the alternative gas introduced into the combustion chamber during the given hour, expressed as a decimal fraction; and

  Q_alt

  is the quantity of the alternative gas introduced into the combustion chamber during the given hour, as measured by a flow meter on the input, expressed in standard m³.

• Marginal note:Gas introduced into combustion chamber

  (2) The concentration of methane in the gaseous fossil fuel introduced into the combustion chamber is

  • (a) for commercial grade natural gas, either

    • (i) to be determined in accordance with ASTM D1945-03, ASTM D1946-90, GPA 2261-25 or GPA 2286-24 , or

    • (ii) fixed as 95%; and

  • (b) for any other gaseous fossil fuel, to be determined in accordance with ASTM D1945-03, ASTM D1946-90, GPA 2261-25 or GPA 2286-24, whichever applies.