§ 98.193 Calculating GHG emissions.
You must calculate and report the annual process CO2 emissions from all lime kilns combined using the procedure in paragraphs (a) and (b) of this section.
(a) If all lime kilns meet 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 from all lime kilns 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) If CEMS are not required to be used to determine CO2 emissions from all lime kilns under paragraph (a) of this section, then you must calculate and report the process and combustion CO2 emissions from the lime kilns by using the procedures in either paragraph (b)(1) or (b)(2) of this section.
(1) Calculate and report under this subpart the combined process and combustion CO2 emissions from all lime kilns by operating and maintaining a CEMS to measure CO2 emissions from all lime kilns 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 process and combustion CO2 emissions from all lime kilns separately using the procedures specified in paragraphs (b)(2)(i) through (viii) of this section.
(i) You must calculate a monthly emission factor for each type of lime produced using Equation S–1 of this section. Calcium oxide and magnesium oxide content must be analyzed monthly for each lime product type that is produced:

Where: