Source: https://www.law.cornell.edu/cfr/text/40/98.243
Timestamp: 2017-04-26 12:14:44
Document Index: 577443270

Matched Legal Cases: ['art 98', '§ 98', '§ 98', '§ 98', '§ 98', '§ 98', '§ 98', '§ 98', '§ 98', '§ 98']

40 CFR 98.243 - Calculating GHG emissions. | US Law | LII / Legal Information Institute
CFR › Title 40 › Chapter I › Subchapter C › Part 98 › Subpart X › Section 98.243 40 CFR 98.243 - Calculating GHG emissions.
§ 98.243 Calculating GHG emissions.
Link to an amendment published at 81 FR 89260, Dec. 9, 2016.
(b)Continuous emission monitoring system (CEMS). Route all process vent emissions and emissions from stationary combustion units that burn any amount of process off-gas to one or more stacks and determine GHG emissions as specified in paragraphs (b)(1) through (3) of this section.
(3) For each flare, calculate CO2, CH4, and N2O emissions using the methodology specified in § 98.253(b)(1) through (3).
(c)Mass balance for each petrochemical process unit. Calculate the emissions of CO2 from each process unit, for each calendar month as described in paragraphs (c)(1) through (c)(5) of this section.
(1) For each gaseous and liquid feedstock and product, measure the volume or mass used or produced each calendar month with a flow meter by following the procedures specified in § 98.244(b)(2). Alternatively, for liquids, you may calculate the volume used or collected in each month based on measurements of the liquid level in a storage tank at least once per month (and just prior to each change in direction of the level of the liquid) following the procedures specified in § 98.244(b)(3). Fuels used for combustion purposes are not considered to be feedstocks.
(2) For each solid feedstock and product, measure the mass used or produced each calendar month by following the procedures specified in § 98.244(b)(1).
(3) Collect a sample of each feedstock and product at least once per month and determine the carbon content of each sample according to the procedures of § 98.244(b)(4). If multiple valid carbon content measurements are made during the monthly measurement period, average them arithmetically. However, if a particular liquid or solid feedstock is delivered in lots, and if multiple deliveries of the same feedstock are received from the same supply source in a given calendar month, only one representative sample is required. Alternatively, you may use the results of analyses conducted by a feedstock supplier, or product customer, provided the sampling and analysis is conducted at least once per month using any of the procedures specified in § 98.244(b)(4).
(4) If you determine that the monthly average concentration of a specific compound in a feedstock or product is greater than 99.5 percent by volume or mass, then as an alternative to the sampling and analysis specified in paragraph (c)(3) of this section, you may determine carbon content in accordance with paragraphs (c)(4)(i) through (iii) of this section.
(i) Calculate the carbon content assuming 100 percent of that feedstock or product is the specific compound.
(i)Gaseous feedstocks and products. Use Equation X-1 of this section to calculate the net annual carbon input or output from gaseous feedstocks and products. Note that the result will be a negative value if there are no gaseous feedstocks in the process but there are gaseous products.
(ii)Liquid feedstocks and products. Use Equation X-2 of this section to calculate the net carbon input or output from liquid feedstocks and products. Note that the result will be a negative value if there are no liquid feedstocks in the process but there are liquid products.
(iii)Solid feedstocks and products. Use Equation X-3 of this section to calculate the net annual carbon input or output from solid feedstocks and products. Note that the result will be a negative value if there are no solid feedstocks in the process but there are solid products.
(iv)Annual emissions. Use the results from Equations X-1 through X-3 of this section, as applicable, in Equation X-4 of this section to calculate annual CO2 emissions.
(d)Optional combustion methodology for ethylene production processes. For each ethylene production process, calculate GHG emissions from combustion units that burn fuel that contains any off-gas from the ethylene process as specified in paragraphs (d)(1) through (d)(5) of this section.
(3) Except as specified in paragraph (d)(5) of this section, calculate CH4 and N2O emissions using the applicable procedures in § 98.33(c) for the same tier methodology that you used for calculating CO2 emissions.
(5) For each flare, calculate CO2, CH4, and N2O emissions using the methodology specified in §§ 98.253(b)(1) through (b)(3).
[ 74 FR 56374, Oct. 30, 2009, as amended at 75 FR 79157, Dec. 17, 2010; 78 FR 71961, Nov. 29, 2013]
40 CFR 98.246 — Data Reporting Requirements.
40 CFR 98.242 — GHGs to Report.
40 CFR 98.247 — Records That Must Be Retained.
40 CFR 98.248 — Definitions.