annually. In the absence of source specific emission factors approved by ARB, the operator shall use the default emission factors provided in Appendix A.
(c) Method for Calculating CO2 Emissions from Fuel Combustion Using Measured Heat Content.
The operator shall use the following equation to CO2 emissions by fuel type using the measured combusted:
calculate fuel combustion heat content of the fuel
n CO2 = ∑ FuelP * HHVP * EF * 0.001
= combustion emissions from specific fuel type, metric
tonnes CO2 per year = Period/frequency of heat content measurements over the
year (e.g. monthly n = 12)
= Mass or volume of fuel combusted for the measurement
period specified by fuel type, units of mass or volume per unit time = High heat value measured for the measurement period specified by fuel type, MMBtu per unit mass or volume Default carbon dioxide emission factor provided in the
Appendix A, kg CO2 per MMBtu 0.001 = Factor to convert kg to metric tonnes
(A) The operator shall measure and record fuel consumption and the fuel’s high heat value at frequencies specified by fuel type below. The operator may elect to utilize and record high heat values provided by the fuel supplier. The frequencies for measurements and recordings are as follows:
At receipt of each new fuel shipment or delivery or on a monthly basis for middle distillates (diesel, gasoline, fuel oil, kerosene), residual oil, liquid waste-derived fuels, and LPG (ethane, propane, isobutene, n-Butane, unspecified LPG);
Monthly for natural gas, associated gas, and mixtures of low Btu gas excluding refinery fuel gas. Operators combusting gases with high heat value <975 or >1100 Btu per scf including natural gas, associated gas, and mixtures of low Btu gas and natural gas, shall use the methodology provided in section 95125(d) to calculate CO2 emissions;