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Federal Register / Vol. 86, No. 86 / Thursday, May 6, 2021 / Rules and Regulations V. References Unless specified otherwise, all documents are available electronically through the Federal Docket Management System, Docket number EPAHQOAR
20190698.

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AHRI, 2017. Petition Requesting EPA SNAP
Approval of R448A/449A/449B for Medium Temperature, Stand-Alone Retail Food Refrigeration Equipment.
Submitted March 20, 2017.
ASHRAE, 2019. ANSI/ASHRAE Standard 342019: Designation and Safety Classification of Refrigerants.
Cousins, et al., 2019. Cousins, I.T., Goldenman G., Herzke, D., Lohmann, R., Miller, M., Ng, C.A., Patton, S., Scheringer, M., Trier, X., Vierke, L., Wang, Z., and DeWitt, J.C. 2019. The concept of essential use for determining when uses of PFASs can be phased out.
Environ. Sci.: Processes Impacts, 2019, 21, 18031815. Available online at:
https pubs.rsc.org/en/content/
articlelanding/2019/em/c9em00163h !divAbstract.
Hodnebrog, et al., 2013. Hodnebrog,
Etminan, M., Fuglestvedt, J.S., Marston, G., Myhre, G., Nielsen, C.J., Shine, K.P., and Wallington, T.J. 2013. Global Warming Potentials and Radiative Efficiencies of Halocarbons and Related Compounds: A Comprehensive Review, Reviews of Geophysics, 51, 300378.
Available online at doi.org/10.1002/
rog.20013.
ICF, 2020a. Risk Screen on Substitutes in Retail Food Refrigeration Mediumtemperature Stand-alone Units New Equipment; Substitute: R448A.
ICF, 2020b. Risk Screen on Substitutes in Retail Food Refrigeration Mediumtemperature Stand-alone Units New Equipment; Substitute: R449A.
ICF, 2020c. Risk Screen on Substitutes in Retail Food Refrigeration Mediumtemperature Stand-alone Units New Equipment; Substitute: R449B.
ICF, 2020d. Risk Screen on Substitutes in Residential and Light Commercial AirConditioning and Heat Pumps New Equipment; Substitute: HFC32.
ICF, 2020e. Risk Screen on Substitutes in Residential and Light Commercial Air-

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Conditioning and Heat Pumps New Equipment; Substitute: R452B.
ICF, 2020f. Risk Screen on Substitutes in Residential and Light Commercial AirConditioning and Heat Pumps New Equipment; Substitute: R454A.
ICF, 2020g. Risk Screen on Substitutes in Residential and Light Commercial AirConditioning and Heat Pumps New Equipment; Substitute: R454B.
ICF, 2020h. Risk Screen on Substitutes in Residential and Light Commercial AirConditioning and Heat Pumps New Equipment; Substitute: R454C.
ICF, 2020i. Risk Screen on Substitutes in Residential and Light Commercial AirConditioning and Heat Pumps New Equipment; Substitute: R457A.
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. Solomon, S., Qin, D., Manning, M., Chen, Z., Marquis, M., Averyt, K.B., Tignor, M., and Miller, H.L. eds..
Cambridge University Press. Cambridge, United Kingdom and New York, NY, USA. Available online at: www.ipcc.ch/
publications_and_data/ar4/wg1/en/
contents.html.
Javadi et al., 2008. Javadi, M.S., Sproducts and mechanisms of hydroxyl radical and chlorine atom-initiated oxidation. Atmospheric Chemistry and Physics Discussions 8, 10691088.
Available online at https www.atmoschem-phys.net/8/3141/2008/.
Kwiatkowski et al. 2020. Kwiatkowski, C.F., Andrews, D.Q., Birnbaum, L.S., Bruton, T.A., DeWitt, J.C., Knappe, D.R.U., Maffini, M.V., Miller, M.F., Pelch, K.E., Reade, A., Soehl, A., Trier, X., Venier, M., Wagner, C.C., Wang, Z., and Blum, A. 2020. Scientific Basis for Managing PFAS as a Chemical Class. Environ. Sci.
Technol. Lett. 2020, 7, 532543.
Available online at: https pubs.acs.org/
doi/10.1021/acs.estlett.0c00255.
Nielsen et al., 2007. Nielsen, O.J., Javadi, M.S., Sulbaek Andersen, M.P., Hurley, M.D., Wallington, T.J., Singh, R. 2007.
Atmospheric chemistry of CF3CF=CH2:

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Kinetics and mechanisms of gas-phase reactions with Cl atoms, OH radicals, and O3. Chemical Physics Letters 439, 1822. Available online at http
www.lexissecuritiesmosaic.com/
gateway/FedReg/network_OJN_174_
CF3CF=CH2.pdf.
The Air Conditioning, Heating, and Refrigeration News, 2020. An HVAC
Technicians Guide to R32, November 12, 2020. Available online at: https
www.achrnews.com/articles/144053-anhvac-technicians-guide-to-r-32?oly_enc_
id=8731J4776701J6C
UL 60335240, 2019. Standard for Safety for Household And Similar Electrical AppliancesSafetyPart 240:
Particular Requirements for Electrical Heat Pumps, Air-Conditioners and Dehumidifiers. Third Edition. November 1, 2019.

List of Subjects in 40 CFR Part 82
Environmental protection, Administrative practice and procedure, Air pollution control, Incorporation by reference, Reporting and recordkeeping requirements, Stratospheric ozone layer.
Michael S. Regan, Administrator.

For the reasons set forth in the preamble, EPA amends 40 CFR part 82
as follows:
PART 82PROTECTION OF
STRATOSPHERIC OZONE
1. The authority citation for part 82
continues to read as follows:

Authority: 42 U.S.C. 7414, 7601, 7671
7671q.

Subpart GSignificant New Alternatives Policy Program Appendix O to Subpart G of Part 82
Amended 2. Appendix O to subpart G of part 82
is amended by removing the entry Total flooding; Powdered Aerosol E
FirePro.

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