CFR > Title 40 - Protection of Environment > CHAPTER I—ENVIRONMENTAL PROTECTION AGENCY > SUBCHAPTER C—AIR PROGRAMS (Parts 50–99) > PART 98—MANDATORY GREENHOUSE GAS REPORTING > SUBPART N—Glass Production (§98.140 to §98.148) > 98.143—Calculating GHG emissions.

98.143—Calculating GHG emissions.

You must calculate and report the annual process CO2 emissions from each continuous glass melting furnace using the procedure in paragraphs (a) and (b) of this section.
(a) For each continuous glass melting furnace that meets the conditions specified in § 98.33(b)(4)(ii) or (iii), you must calculate and report under this subpart the combined process and combustion CO2 emissions by operating and maintaining a CEMS to measure CO2 emissions according to the Tier 4 Calculation Methodology specified in § 98.33(a)(4) and all associated requirements for Tier 4 in subpart C of this part (General Stationary Fuel Combustion Sources).
(b) For each continuous glass melting furnace that is not subject to the requirements in paragraph (a) of this section, calculate and report the process and combustion CO2 emissions from the glass melting furnace by using either the procedure in paragraph (b)(1) of this section or the procedure in paragraphs (b)(2) through (b)(7) of this section, except as specified in paragraph (c) of this section.
(1) Calculate and report under this subpart the combined process and combustion CO2 emissions by operating and maintaining a CEMS to measure CO2 emissions according to the Tier 4 Calculation Methodology specified in § 98.33(a)(4) and all associated requirements for Tier 4 in subpart C of this part (General Stationary Fuel Combustion Sources).
(2) Calculate and report the process and combustion CO2 emissions separately using the procedures specified in paragraphs (b)(2)(i) through (b)(2)(vi) of this section.
(i) For each carbonate-based raw material charged to the furnace, obtain from the supplier of the raw material the carbonate-based mineral mass fraction.
(ii) Determine the quantity of each carbonate-based raw material charged to the furnace.
(iii) Apply the appropriate emission factor for each carbonate-based raw material charged to the furnace, as shown in Table N-1 to this subpart.
(iv) Use Equation N-1 of this section to calculate process mass emissions of CO2 for each furnace:
Where:
ECO2 = Process emissions of CO2 from the furnace (metric tons).
n = Number of carbonate-based raw materials charged to furnace.
MFi = Annual average mass fraction of carbonate-based mineral i in carbonate-based raw material i (percentage, expressed as a decimal).
Mi = Annual amount of carbonate-based raw material i charged to furnace (tons).
2000/2205 = Conversion factor to convert tons to metric tons.
EFi = Emission factor for carbonate-based raw material i (metric ton CO2 per metric ton carbonate-based raw material as shown in Table N-1 to this subpart).
Fi = Fraction of calcination achieved for carbonate-based raw material i, assumed to be equal to 1.0 (percentage, expressed as a decimal).
(v) You must calculate the total process CO2 emissions from continuous glass melting furnaces at the facility using Equation N-2 of this section:
Where:
CO2 = Annual process CO2 emissions from glass manufacturing facility (metric tons).
ECO2i = Annual CO2 emissions from glass melting furnace i (metric tons).
k = Number of continuous glass melting furnaces.
(vi) Calculate and report under subpart C of this part (General Stationary Fuel Combustion Sources) the combustion CO2 emissions in the glass furnace according to the applicable requirements in subpart C.
(c) As an alternative to data provided by the raw material supplier, a value of 1.0 can be used for the mass fraction (MFi) of carbonate-based mineral i in Equation N-1 of this section.