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Federal Register / Vol. 86, No. 27 / Thursday, February 11, 2021 / Notices information on the status of rulemakings and stakeholder interaction, including opportunities for submitting public comment, on the Agencys website.
III. What data are available?
EPA is announcing the availability of data related to the U.S. HFC production and consumption baselines as defined in the AIM Act. Data contained in this NODA and the associated docket is derived from EPAs GHGRP for the years 20112013. Some data will be provided in this notice and posted in the docket as of the date of publication of this NODA. Additional data that is denoted with an asterisk in tables provided later in this notice will be uploaded to the docket on February 8, 2021.
Under 40 CFR part 98, the GHGRP
requires reporting of greenhouse gas GHG data and other relevant information from large GHG emission sources, fuel and industrial gas suppliers, and suppliers of carbon dioxide CO2. The GHGRP also requires producers of HFCs and importers or exporters that supply a total of 25,000
metric tons carbon dioxide equivalent
CO2e or more of fluorinated GHGs including HFCs, nitrous oxide, and carbon dioxide to report their supplies to EPA annually. Suppliers include producers, importers, exporters, and destroyers of HFCs who report under 40 CFR part 98, subpart OO and importers and exporters of pre-charged equipment e.g., window air conditioners and closed-cell foams that contain HFCs who report under 40 CFR
part 98, subpart QQ. Under subpart OO, producers are required to report the quantities that they produce, transform unless the transformed feedstock is produced onsite, destroy, or send offsite for transformation or destruction.
Importers of bulk HFCs are required to report the quantities that they import, destroy, or send off-site for transformation or destruction.2
Exporters of bulk HFCs are required to report the quantities that they export.
For the years 20112013, 42
companies reported HFC supply data under Subpart OO via the GHGRP some of which owned multiple facilities.
EPA anticipates at this time that the GHGRP data that will be used the most
9061

to inform the U.S. production and consumption baselines are the supplies of HFCs listed as regulated substances in the AIM Act that are reported under Subpart OO of the GHGRP.
The AIM Act states that for purposes of establishing the baselines and in implementing the statutorily required HFC phasedown, EPA shall use the statutorily provided exchange values for each regulated substance i.e., HFCs, HCFCs, and CFCs. These exchange values are numerically identical to the global warming potentials GWPs for those substances provided in the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.3 Because the GHGRP collects and reports information using GWPs, for the purposes of this notice and the reports provided in the docket, the terms exchange values and GWP
have equivalent meaning and the terms are used interchangeably. The HFCs listed as regulated substances in the AIM Act, and the exchange values that are assigned to them, are listed in Table 1.

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TABLE 1HFCS LISTED AS REGULATED SUBSTANCES IN THE AIM ACT
Exchange value
HFC

Chemical formula
HFC134
HFC134a
HFC143
HFC245fa
HFC365mfc
HFC227ea
HFC236cb
HFC236ea
HFC236fa
HFC245ca
HFC4310mee
HFC32
HFC125
HFC143a
HFC41
HFC152
HFC152a
HFC23

CHF2CHF2
CH2FCF3
CH2FCHF2
CHF2CH2CF3
CF3CH2CF2CH3
CF3CHFCF3
CH2FCF2CF3
CHF2CHFCF3
CF3CH2CF3
CH2FCF2CHF2
CF3CHFCHFCF2CF3
CH2F2
CHF2CF3
CH3CF3
CH3F
CH2FCH2F
CH3CHF2
CHF3

1,100
1,430
353
1,030
794
3,220
1,340
1,370
9,810
693
1,640
675
3,500
4,470
92
53
124
14,800

EPA is providing as much data as possible while respecting confidentiality determinations finalized through previous GHGRP rulemakings.
Many of the data elements reported to subpart OO of the GHGRP were determined to be, and are treated as, confidential by EPA. The data presented in Tables 3 and 4, collected under subpart OO from producers, importers, and exporters of HFCs, are aggregations
that shield the underlying CBI from public disclosure. On June 9, 2014, EPA
issued a Federal Register notice 79 FR
32948 describing the criteria used to confirm that an aggregation protects underlying CBI data. Combined, the criteria ensure that publishing aggregated values that meet the criteria would not inadvertently disclose facilityor supplier-level CBI. The June 9, 2014 FR notice also describes the
circumstances and procedures used to notify individual reporters of EPAs intent to aggregate confidential data based on Agencys CBI regulations found in 40 CFR part 2.
EPAs CBI regulations require us to offer the opportunity to make a CBI
claim to any business which, although it has not asserted a CBI claim, might be expected to assert a claim if it knew EPA proposed to disclose the
2 Under the GHGRP, bulk with respect to industrial GHG suppliers and CO2 suppliers, means the transfer of a product inside containers,
including but not limited to tanks, cylinders, drums, and pressure vessels.

3 IPCC, 2007. Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Intergovernmental Panel on Climate Change.

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