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# Subarticle 3. Calculation Methods Applicable to Multiple Types of Facilities

§ 95125. Additional Calculation Methods. Operators shall use one or more of the following methods to calculate emissions as required in sections 95110 through 95115.

• (a)

Method for Calculating CO2 Emissions from Fuel Combustion Using Default Emission Factors and Default Heat Content.

• (1)

The operator shall use the method in section 95125(a)(2) to calculate CO2 emissions, applying the default emission factors and default heat content values provided in the Appendix A, for each type of fuel combusted at the facility.

(2)

The operator shall calculate each fuel’s CO2 emissions and report them in metric tonnes using the following equation:

## CO2 = Fuel * HHVD * EFCO2* 0.001

Where: CO2

= C O 2 e m i s s i o n s f r o m a s p e c i f i c f u e l t y p e , m e t r i c t o n n e s C O 2 p e r y e a r

# Fuel = Mass or volume of fuel combusted specified by fuel type

,

HHVD

### EFCO2

unit of mass or volume per year = Default high heat value specified by fuel type supplied by ARB, MMBtu per unit of mass or volume = Default carbon dioxide emission factor provided in Appendix A, kg CO2 per MMBtu

# 0.001 = Factor to convert kg to metric tonnes

(b) Method for Calculating CH4 and N2O Emissions from Fuel Combustion Using Default Emission Factors.

(1)

The operator shall use the methods in this section to calculate CH4 and N2O emissions, applying the default emission factors provided in the Appendix A for each type of fuel, except as provided in section 95125(b)(4). If the operator measures heat content as specified in section 95125(c), the measured heat content shall be used in the equation in section 95125(b)(2). If the heat content is not measured, the operator shall employ the default heat content values specified in Appendix A by fuel type and the equation specified in section 95125(b)(3). If an operator combusts a fuel whose heat content is not provided in Appendix A, the operator shall measure heat content as specified by fuel type in section 95125(c) and utilize the N2O and CH4 emissions methodology specified in section 95125(b)(2). Operators may elect to determine N2O and CH4 emissions using the method specified

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