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Title 40

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Displaying title 40, up to date as of 7/08/2026. Title 40 was last amended 7/08/2026.
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  1. Title 40 —Protection of Environment
  2. Chapter I —Environmental Protection Agency
  3. Subchapter C —Air Programs
  4. Part 98 —Mandatory Greenhouse Gas Reporting
  5. Subpart U —Miscellaneous Uses of Carbonate
  6. § 98.213
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eCFR Content

The Code of Federal Regulations (CFR) is the official legal print publication containing the codification of the general and permanent rules published in the Federal Register by the departments and agencies of the Federal Government. The Electronic Code of Federal Regulations (eCFR) is a continuously updated online version of the CFR. It is not an official legal edition of the CFR.

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Editorial Note on Part 98

Editorial Note:

At 90 FR 21227, May 19, 2025, as required by the Congressional Review Act and Public Law 119-2, the Environmental Protection Agency removed the amendments to §§ 98.3 and 98.4 made effective on Jan. 17, 2025, at 89 FR 91163, Nov. 18, 2024. As of May 19, 2025, §§ 98.3 and 98.4 reverted to the Jan. 16, 2025 version.

§ 98.213 Calculating GHG emissions.

You must determine CO2 process emissions from carbonate use in accordance with the procedures specified in either paragraphs (a) or (b) of this section.

(a) Calculate the process emissions of CO2 using calcination fractions with Equation U-1 of this section.

Where:

ECO2 = Annual CO2 mass emissions from consumption of carbonates (metric tons).

Mi = Annual mass of carbonate type i consumed (tons).

EFi = Emission factor for the carbonate type i, as specified in Table U-1 to this subpart, metric tons CO2/metric ton carbonate consumed.

Fi = Fraction calcination achieved for each particular carbonate type i (decimal fraction). As an alternative to measuring the calcination fraction, a value of 1.0 can be used.

n = Number of carbonate types.

2000/2205 = Conversion factor to convert tons to metric tons.

(b) Calculate the process emissions of CO2 using actual mass of output carbonates with Equation U-2 of this section.

Where:

ECO2 = Annual CO2 mass emissions from consumption of carbonates (metric tons).

Mk = Annual mass of input carbonate type k (tons).

EFk = Emission factor for the carbonate type k, as specified in Table U-1 of this subpart (metric tons CO2/metric ton carbonate input).

Mj = Annual mass of output carbonate type j (tons).

EFj = Emission factor for the output carbonate type j, as specified in Table U-1 of this subpart (metric tons CO2/metric ton carbonate input).

m = Number of input carbonate types.

n = Number of output carbonate types.

eCFR Content