3037 Federal Register / Vol. 87, No. 13 / Thursday, January 20, 2022 / Rules and Regulations 
This safety zone will prohibit entry into 
certain navigable waters in the path of these launches near Cape Canaveral, FL. It is categorically excluded from further review under paragraph L60(a) of Appendix A, Table 1 of DHS Instruction Manual 023–01–001–01, Rev. 1. A Record of Environmental Consideration supporting this determination is available in the docket. For instructions on locating the docket, see the 
ADDRESSES section of this preamble. 
G. Protest Activities 
The Coast Guard respects the First 
Amendment rights of protesters. Protesters are asked to call or email the person listed in the 
FOR FURTHER  
INFORMATION CONTACT section to 
coordinate protest activities so that your message can be received without jeopardizing the safety or security of people, places or vessels. 
List of Subjects in 33 CFR Part 165 
Harbors, Marine safety, Navigation 
(water), Reporting and recordkeeping 
requirements, Security measures, Waterways. 
For the reasons discussed in the 
preamble, the Coast Guard amends 33 CFR part 165 as follows: 
PART 165—REGULATED NAVIGATION 
AREAS AND LIMITED ACCESS AREAS 
■1. The authority citation for part 165 
continues to read as follows: 
Authority: 46 U.S.C. 70034, 70051; 33 CFR 
1.05–1, 6.04–1, 6.04–6, and 160.5; 
Department of Homeland Security Delegation No. 00170.1, Revision No. 01.2. 
■2. Add § 165.T07–0450 to read as 
follows: 
§ 165.T07–0450 Safety Zone; Atlantic Ocean, Cape Canaveral, FL. 
(a) Location. The following area is a 
safety zone: All waters of the Atlantic 
Ocean, from surface to bottom, encompassed by a line connecting the following points beginning at Point 1: 28°36′51.88″ N 80°35′57.33″ W, thence 
to Point 2: 28°34′0.00″ 80°25′0.00″ W, 
thence to Point 3: 28°14′0.00″ 
80°13′0.00″ W, thence to Point 4: 
28°12′0.00″ N 80°23′0.00″ W, thence to 
Point 5: 28°16′0.00″ N, 80°26′00.00″ W, 
thence to point 6: 28°26′31.81″ N, 
80°33′8.02″ W. These coordinates are 
based on WGS 84. 
(b) Definitions. As used in this 
section, designated representative 
means a Coast Guard Patrol Commander, including a Coast Guard coxswain, petty officer, or other officer operating a Coast Guard vessel, and U.S. Air Force range safety personnel, and a Federal, State, and local officer designated by or assisting the Captain of the Port Jacksonville (COTP) in the enforcement of the safety zone. 
(c) Regulations. (1) Under the general 
safety zone regulations in subpart C of this part, you may not enter the safety zone described in paragraph (a) of this section unless authorized by the COTP or the COTP’s designated representative. 
(2) To seek permission to enter, transit 
through, anchor in, or remain within the safety zone contact the COTP Jacksonville by telephone at (904) 714– 7557 or the COTP’s representative via VHF–FM radio on channel 16. Those in the safety zone must comply with all lawful orders or directions given to them by the COTP or the COTP’s designated representative. 
(d) Enforcement period. This section 
will be enforced from January 13, 2022, 
through January 31, 2022, during times when a Broadcast Notice to Mariners informs mariners that space vehicles are being launched in a direction resulting in a southerly or polar orbit trajectory. 
Dated: January 12, 2022. 
J.D. Rose, 
Commander, U.S. Coast Guard,Acting, 
Captain of the Port. 
[FR Doc. 2022–01004 Filed 1–19–22; 8:45 am] 
BILLING CODE 9110–04–P 
ENVIRONMENTAL PROTECTION 
AGENCY 
40 CFR Part 82 
[EPA–HQ–OAR–2003–0118; FRL–9445–01– 
OAR] 
RIN 2060–AG12 
Protection of Stratospheric Ozone: 
Determination 37 for Significant New Alternatives Policy Program 
AGENCY : Environmental Protection 
Agency (EPA). 
ACTION : Determination of acceptability. 
SUMMARY : This determination of 
acceptability expands the list of acceptable substitutes pursuant to the U.S. Environmental Protection Agency’s Significant New Alternatives Policy program. This action lists as acceptable additional substitutes for use in the refrigeration and air conditioning; foam blowing; aerosols; cleaning solvents; and adhesives, coatings, and inks sectors. 
DATES : This determination is applicable 
on January 20, 2022. 
ADDRESSES : EPA established a docket 
for this action under Docket ID No. EPA–HQ–OAR–2003–0118 (continuation of Air Docket A–91–42). All electronic documents in the docket are listed in the index at www.regulations.gov. Although listed in 
the index, some information is not publicly available, i.e., Confidential 
Business Information (CBI) or other information whose disclosure is restricted by statute. Publicly available docket materials are available either electronically at www.regulations.gov or 
in hard copy at the EPA Air Docket (Nos. A–91–42 and EPA–HQ–OAR– 2003–0118), EPA Docket Center (EPA/ DC), William J. Clinton West, Room 3334, 1301 Constitution Avenue NW, Washington, DC 20460. The telephone number for the Public Reading Room is (202) 566–1744, and the telephone number for the Air Docket is (202) 566– 1742. Out of an abundance of caution for members of the public and our staff, the EPA Docket Center and Reading Room are closed to public visitors, with limited exceptions, to reduce the risk of transmitting COVID–19. Our Docket Center staff will continue to provide remote customer service via email, phone, and webform. For further information on EPA Docket Center services and the current status, please visit us online at https://www.epa.gov/ dockets. 
FOR FURTHER INFORMATION CONTACT : 
Gerald Wozniak by telephone at (202) 343–9624, by email at Wozniak.gerald@epa.gov, or by mail at U.S. 
Environmental Protection Agency, Mail Code 6205T, 1200 Pennsylvania Avenue NW, Washington, DC 20460. Overnight or courier deliveries should be sent to the office location at 1201 Constitution Avenue NW, Washington, DC 20004. 
SUPPLEMENTARY INFORMATION : 
Table of Contents 
I. Listing of New Acceptable Substitutes 
A. Refrigeration and Air Conditioning 
B. Foam Blowing C. Aerosols D. Cleaning Solvents E. Adhesives, Coatings, and Inks 
Appendix A: Summary of Decisions for New 
Acceptable Substitutes 
I. Listing of New Acceptable Substitutes 
This action is listing as acceptable 
additional substitutes for use in the 
refrigeration and air conditioning; foam blowing; aerosols; cleaning solvents; and adhesives, coatings and inks sectors. This action presents EPA’s most recent decision under the Significant New Alternatives Policy (SNAP) program to list as acceptable several substitutes in different end-uses. New substitutes are: 
•Hydrochlorofluoroolefin (HCFO)– 
1233zd(E) in cold storage warehouses, 
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1WMO (World Meteorological Organization), 
Scientific Assessment of Ozone Depletion: 2018, 
Global Ozone Research and Monitoring Project— Report No. 58, 588 pp., Geneva, Switzerland, 2018. Available at: https://ozone.unep.org/sites/default/ files/2019-05/SAP-2018-Assessment-report.pdf. In 
this action, the 100-year GWP values are used. ice skating rinks and industrial process 
air conditioning (new equipment only); 
•Blends of 10 to 90 percent 
hydrofluoroolefin (HFO)–1234ze(E) by weight and the remainder HCFO– 1233zd(E) in polystyrene: Extruded boardstock and billet (XPS); 
•Blends of 10 to 90 percent HFO– 
1234ze(E) by weight and the remainder hydrofluorocarbon (HFC)–152a in XPS; 
•Blends of zero to 100 percent HFO– 
1234ze(E), zero to 70 percent methyl formate, zero to 60 percent HFC–152a, zero to 60 percent carbon dioxide (CO
2), 
and zero to 60 percent water in XPS; and 
•HCFO–1233yd(Z) in electronics 
cleaning, metals cleaning, precision cleaning, aerosol solvents, and coatings. 
EPA’s review of certain substitutes 
listed in this document is pending for other end-uses. Listing decisions in the end-uses in this document do not prejudge EPA’s listings of these substitutes for other end-uses. While certain substitutes being added through this action to the acceptable lists for specific end-uses may have a higher risk in one or more SNAP criteria than certain other substitutes already listed 
as acceptable or acceptable subject to restrictions, they have a similar or lower overall risk than other acceptable substitutes in those end-uses. 
For additional information on SNAP, 
visit the SNAP portion of EPA’s Ozone Layer Protection website at: www.epa.gov/snap. Copies of the full 
lists of acceptable substitutes for ozone- depleting substances (ODS) in the industrial sectors covered by the SNAP program are available at www.epa.gov/ snap/substitutes-sector. For more 
information on the Agency’s process for administering the SNAP program or criteria for evaluation of substitutes, refer to the initial SNAP rulemaking published March 18, 1994 (59 FR 13044), and the regulations codified at 40 CFR part 82, subpart G. SNAP decisions and the appropriate Federal Register citations are found at: 
www.epa.gov/snap/snap-regulations. Substitutes listed as unacceptable; acceptable, subject to narrowed use limits; or acceptable, subject to use conditions are also listed in the appendices to 40 CFR part 82, subpart G. 
The sections below discuss each 
substitute listing in detail. Appendix A contains tables summarizing each listing decision in this action. The statements in the ‘‘Further Information’’ column in the tables provide additional information but these are not legally binding under section 612 of the Clean Air Act (CAA). Although you are not required to follow recommendations in the ‘‘Further Information’’ column of the table under section 612 of the CAA, some of these statements may refer to obligations that are enforceable or binding under federal or state programs other than the SNAP program. The identification of other enforceable or binding requirements should not be construed as a comprehensive list of such obligations. In many instances, the information simply refers to standard operating practices in existing industry standards and/or building codes. When using these substitutes in the identified end-use, EPA strongly encourages you to apply the information in the ‘‘Further Information’’ column. Many of these recommendations, if adopted, would not require significant changes to existing operating practices. 
You can find submissions to EPA for 
the substitutes listed in this document, as well as other materials supporting the decisions in this action, in Docket EPA– HQ–OAR–2003–0118 at www.regulations.gov. 
A. Refrigeration and Air Conditioning 1. HCFO–1233zd(E) 
EPA’s decision: EPA finds HCFO– 
1233zd(E) acceptable as a substitute for 
use in: 
•Cold storage warehouses (new 
equipment only) 
•Ice skating rinks (new equipment 
only) 
•Industrial process air conditioning 
(new equipment only) 
HCFO–1233zd(E), marketed under the 
trade name Solstice
®zd, is also known 
as trans-1-chloro-3,3,3-trifluoroprop-1- 
ene (Chemical Abstracts Service 
Registry Number [CAS Reg. No.] 102687–65–0). 
You may find a copy of the 
applicant’s submission, with CBI redacted, providing the required health and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 Listing of HCFO–1233zd(E) in Refrigeration and Air Conditioning. SNAP Submission Received October 7, 2019.’’ EPA performed an assessment to examine the health and environmental risks of this substitute. These assessments are available in Docket EPA–HQ–OAR–2003–0118: 
•‘‘Risk Screen on Substitutes in Cold 
Storage Warehouses and Industrial Process Air Conditioning. Substitute: HCFO–1233zd(E).’’ 
•‘‘Risk Screen on Substitutes in Ice 
Skating Rinks. Substitute: HCFO– 1233zd(E).’’ EPA previously listed HCFO– 
1233zd(E) as acceptable for use in 
several refrigeration and air conditioning and foam blowing end- uses (December 11, 2020, 85 FR 79863; August 10, 2012, 77 FR 47768; October 21, 2014, 79 FR 62863). 
Environmental information: HCFO– 
1233zd(E) has an ozone depletion 
potential (ODP) of less than 0.0004 and a global warming potential (GWP) of 3.7.
1HCFO–1233zd(E) is excluded from 
the definition of volatile organic compounds (VOC) under CAA regulations (see 40 CFR 51.100(s)) addressing the development of state implementation plans (SIPs) to attain and maintain the National Ambient Air Quality Standards (NAAQS). Knowingly venting or releasing this refrigerant blend is limited by the venting prohibition under section 608(c)(2) of the CAA, codified in EPA’s regulations at 40 CFR 82.154(a). 
Flammability information: HCFO– 
1233zd(E) is not flammable. 
Toxicity and exposure data: Potential 
health effects of exposure to this substitute include drowsiness or dizziness. The substitute may also irritate the skin or eyes or cause frostbite. The substitute could cause asphyxiation if air is displaced by vapors in a confined space. These potential health effects are common to many refrigerants. 
The Workplace Environmental 
Exposure Limit (WEEL) Committee of the Occupational Alliance for Risk Science (OARS) has established a WEEL of 800 ppm on an eight-hour time- weighted average (8-hr TWA) for HCFO–1233zd(E). EPA anticipates that users will be able to meet the WEEL and address potential health risks by following requirements and recommendations in the manufacturer’s safety data sheet (SDS), American Society of Heating, Refrigerating, and Air-Conditioning Engineers (ASHRAE) Standard 15, and other safety precautions common to the refrigeration and air conditioning industry. 
Comparison to other substitutes in 
these end-uses: HCFO–1233zd(E) has an ODP of less than 0.0004, comparable to or less than other listed substitutes in these end-uses with ODPs ranging from zero to 0.098. 
For cold storage warehouses, HCFO– 
1233zd(E)’s GWP of about 3.7 is comparable to or lower than that of 
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2Unless otherwise stated, all GWPs in this 
document for individual chemicals are 100-year 
values from: 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. This document is accessible at www.ipcc.ch/ 
publications_ and_ data/ar4/wg1/en/contents.html. 
For blends of chemicals, such as R-507A, this document weights the GWPs of each component of the blend by their mass percentage in the blend, based upon the 100-year GWPs in IPCC, 2007, if available in that document. 
3WMO (World Meteorological Organization), 
Scientific Assessment of Ozone Depletion: 2018, Global Ozone Research and Monitoring Project— Report No. 58, 588 pp., Geneva, Switzerland, 2018. Available at: https://ozone.unep.org/sites/default/ files/2019-05/SAP-2018-Assessment-report.pdf. (WMO, 2018) 
4WMO, 2018. 5Bellair and Hood, 2019. Comprehensive 
evaluation of the flammability and ignitability of 
HFO–1234ze, R.J. Bellair and L. Hood, Process Safety and Environmental Protection 132 (2019) 273–284. Available online at doi.org/10.1016/ j.psep.2019.09.033. 
6That is, alkanes with three to six carbons such 
as butane, n-pentane, isopentane, and cyclopentane. other acceptable substitutes for new 
equipment such as ammonia absorption, CO
2, R-450A, R-513A, and R-407C, with 
GWPs2ranging from zero to 1,770. 
For ice skating rinks and industrial 
process air conditioning, HCFO– 1233zd(E)’s GWP of about 3.7 is comparable to or lower than that of other acceptable substitutes for new equipment such as ammonia absorption, CO
2, R-450A, R-513A, and R-507A, with 
GWPs ranging from zero to 3,990. 
Flammability and toxicity risks are 
comparable to or lower than flammability and toxicity risks of other available substitutes in the same end- uses. Toxicity risks can be minimized by use consistent with the OARS WEEL, ASHRAE 15, and other industry standards, recommendations in the manufacturer’s SDS, and other safety precautions common in the refrigeration and air conditioning industry. 
EPA finds HCFO–1233zd(E) 
acceptable in the cold storage warehouses (new equipment only), ice skating rinks (new equipment only) and industrial process air conditioning (new equipment only) end-uses because it does not pose greater overall environmental and human health risk than other available substitutes in the same end-uses. 
B. Foam Blowing 1. Blends of 10 to 90 Percent HFO– 
1234ze(E) by Weight and the Remainder HCFO–1233zd(E) 
EPA’s decision: EPA finds blends of 
10 to 90 percent HFO–1234ze(E) by weight and the remainder HCFO– 1233zd(E) acceptable as a substitute for use as a blowing agent in: 
•Polystyrene: Extruded boardstock and 
billet 
These blends range in composition 
from 10 percent HFO–1234ze(E) and 90 
percent HCFO–1233zd(E) to 90 percent HFO–1234ze(E) and 10 percent HCFO– 1233zd(E). Accordingly, these blends are referred to as blends of 10 to 90 percent by weight HFO–1234ze(E) and the remainder HCFO–1233zd(E), or hereafter in this action as ‘‘HFO– 
1234ze(E)/HCFO–1233zd(E) co-blowing blends’’; they also go by the trade name of Solstice
®XBA–1. HFO–1234ze(E) is 
also called 1,3,3,3-tetrafluoropropene (E), or trans-1,3,3,3-tetrafluoropropene 
(CAS Reg. No. 29118–24–9). HCFO– 1233zd(E) is also called trans-1-chloro- 
3,3,3-trifluoro-prop-1-ene (CAS Reg. No. 102687–65–0). 
You may find a copy of the 
applicant’s submission, with CBI redacted, providing the required health and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 Listing Blends of 10 to 90 Percent HFO– 1234ze(E) by Weight and the Remainder HCFO–1233zd(E) as a Foam Blowing Agent. SNAP Submission Received November 4, 2019.’’ EPA has performed 
an assessment to examine the health and environmental risks of this substitute. This assessment is available in docket EPA–HQ–OAR–2003–0118 under the name ‘‘Risk Screen on Substitutes in Extruded Polystyrene Boardstock and Billet Foam Substitute: Blends of 10 to 90 Percent HFO– 1234ze(E) by Weight and the Remainder HCFO–1233zd(E) (Solstice
®XBA–1).’’ 
Environmental information: HFO– 
1234ze(E) has an ODP of zero and HCFO–1233zd(E) has an ODP of less than 0.0004.
3If these values are 
weighted by mass percentage, then these HFO–1234ze(E)/HCFO–1233zd(E) co- blowing blends have an ODP ranging from less than 0.0004 to less than 0.00004. Their components, HFO– 1234ze(E) and HCFO–1233zd(E), have GWPs of less than one
4and 3.7, 
respectively. If these values are weighted by mass percentage, then the blends range in GWP from about 1.3 to about 3.4. Both components of the blends are excluded from the definition of VOC under CAA regulations (see 40 CFR 51.100(s)) addressing the development of SIPs to attain and maintain the NAAQS. 
Flammability information: The 
component HCFO–1233zd(E) is non- flammable. HFO–1234ze(E) is not flammable at standard temperature and pressure using the standard test method American Society for Testing and Materials (ASTM) E681. However, at higher temperatures, such as the temperatures typical for extruding XPS, 
HFO–1234ze(E) may also be flammable, particularly at higher humidity levels.
5 
Toxicity and exposure data: Potential 
health effects of these substitutes at lower concentrations include drowsiness and dizziness. Potential health effects also include skin or eye irritation or frostbite. The components of HFO–1234ze(E)/HCFO–1233zd(E) co- blowing blends can cause symptoms of asphyxiation when present at sufficiently high concentrations. Excessive inhalation of the substitute may also result in an irregular heartbeat, due to cardiac effects. These potential health effects are common to many foam blowing agents. 
The American Industrial Hygiene 
Association (AIHA) has established a WEEL of 800 ppm as an 8-hr TWA for HFO–1234ze(E), and OARS’s WEEL committee has established a WEEL of 800 ppm for HCFO–1233zd(E). EPA anticipates that users will be able to meet the AIHA and OARS WEELs and address potential health risks by following requirements and recommendations in the manufacturer’s SDSs and other safety precautions common to the foam blowing industry. 
Comparison to other substitutes in 
this end-use: These HFO–1234ze(E)/ HCFO–1233zd(E) co-blowing blends have an ODP ranging from less than 0.0004 to less than 0.00004, comparable to all other acceptable substitutes in this end-use, such as blends of 10 to 99 percent by weight HFO–1336mzz(Z) and the remainder HFC–152a (hereafter in this action ‘‘HFO–1336mzz(Z)/HFC– 152a blends’’), HFO–1234ze(E), methyl formate, and CO
2.These HFO– 
1234ze(E)/HCFO–1233zd(E) blends’ GWPs from about 1.3 to 3.4 are lower than or comparable to those of other acceptable substitutes in the same end- use for which we are finding it acceptable, such as HFO–1336mzz(Z)/ HFC–152a blends, HFO–1234ze(E), light saturated hydrocarbons C3–C6
6and 
methyl formate, with respective GWPs 
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7HFO–1336mzz(Z) and HFC–152a have GWPs of 
about two (WMO, 2018) and 124 (IPCC, 2007), 
respectively. If these values are weighted by mass percentage, then the blends range in GWP from about three to about 110. 
8WMO (World Meteorological Organization), 
Scientific Assessment of Ozone Depletion: 2018, Global Ozone Research and Monitoring Project— Report No. 58, 588 pp., Geneva, Switzerland, 2018. Available at: https://ozone.unep.org/sites/default/ files/2019-05/SAP-2018-Assessment-report.pdf. 
9Ibid. 
10Ibid. 11WMO (World Meteorological Organization), 
Scientific Assessment of Ozone Depletion: 2018, Global Ozone Research and Monitoring Project— Report No. 58, 588 pp., Geneva, Switzerland, 2018. Available at: https://ozone.unep.org/sites/default/ files/2019-05/SAP-2018-Assessment-report.pdf. 
12Bellair and Hood, 2019. Comprehensive 
evaluation of the flammability and ignitability of HFO–1234ze, R.J. Bellair and L. Hood, Process Safety and Environmental Protection 132 (2019) 273–284. Available online at doi.org/10.1016/ j.psep.2019.09.033. 13HFO–1336mzz(Z) and HFC–152a have GWPs of 
about two (WMO, 2018) and 124 (IPCC, 2007), respectively. If these values are weighted by mass percentage, then the blends range in GWP from about three to about 110. 
14WMO (World Meteorological Organization), 
Scientific Assessment of Ozone Depletion: 2018, Global Ozone Research and Monitoring Project— Report No. 58, 588 pp., Geneva, Switzerland, 2018. Available at: https://ozone.unep.org/sites/default/ files/2019-05/SAP-2018-Assessment-report.pdf. 
15Ibid. 
16Ibid. of approximately three to 110,7124, 
one,8less than one,9and 11.10 
Flammability and toxicity risks are 
comparable to or lower than 
flammability and toxicity risks of other available substitutes in the same end- use. Some acceptable substitutes in this end-use are flammable, like HFC–152a, light saturated hydrocarbons C3–C6, and methyl formate, while others are non-flammable. Toxicity risks can be minimized by use consistent with the AIHA’s and OARS’s WEELs, recommendations in the SDS, and other safety precautions common in the foam blowing industry. 
EPA finds blends of 10 to 90 percent 
by weight HFO–1234ze(E) and the remainder HCFO–1233zd(E) acceptable in the XPS end-use because they do not pose greater overall environmental and human health risk than other available substitutes in the same end-use. 
2. Blends of 10 to 90 Percent HFO– 
1234ze(E) by Weight and the Remainder HFC–152a 
EPA’s decision: EPA finds blends of 
10 to 90 percent HFO–1234ze(E) by weight and the remainder HFC–152a acceptable as a substitute for use as a blowing agent in: 
•Polystyrene: Extruded boardstock and 
billet These blends range in composition 
from 10 percent HFO–1234ze(E) and 90 
percent HFC–152a to 90 percent HFO– 1234ze(E) and 10 percent HFC–152a. Accordingly, these blends are also referred to as blends of 10 to 90 percent by weight HFO–1234ze(E) and the remainder HFC–152a, or hereafter in this action as ‘‘HFO–1234ze(E)/HFC– 152a co-blowing blends’’; they also go by the trade name of Solstice
®XBA–2. 
HFO–1234ze(E) is also called 1,3,3,3- tetrafluoropropene (E), or trans-1,3,3,3- tetrafluoropropene (CAS Reg. No. 29118–24–9). HFC–152a is also called 1,1-difluoroethane (CAS Reg. No. 75– 37–6). 
You may find a copy of the 
applicant’s submission, with CBI redacted, providing the required health 
and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 
Listing Blends of 10 to 90 Percent HFO– 1234ze(E) by Weight and the Remainder HFC–152a as a Foam Blowing Agent. SNAP Submission Received November 4, 2019.’’ EPA has performed an assessment to examine the health and environmental risks of this substitute. This assessment is available in docket EPA–HQ–OAR–2003–0118 under the name ‘‘Risk Screen on Substitutes in Extruded Polystyrene Boardstock and Billet Foam Substitute: Blends of 10 to 90 Percent HFO–1234ze(E) by Weight and the Remainder HFC–152a (Solstice
® 
XBA–2).’’ 
Environmental information: These 
HFO–1234ze(E)/HFC–152a co-blowing blends and their components have an ODP of zero. Their components, HFO– 1234ze(E) and HFC–152a, have GWPs of less than one
11and 124, respectively. If 
these values are weighted by mass percentage, then the blends range in GWP from about 13 to about 112. Both components of the blends are excluded from the definition of VOC under CAA regulations (see 40 CFR 51.100(s)) addressing the development of SIPs to attain and maintain the NAAQS. 
Flammability information: The 
component HFC–152a is flammable while the component HFO–1234ze(E) is not flammable at standard temperature and pressure using the standard test 
method ASTM E681. However, at higher temperatures, such as the temperatures typical for extruding XPS, HFO– 1234ze(E) may also be flammable, particularly at higher humidity levels.
12 
Toxicity and exposure data: Potential 
health effects of these substitutes at lower concentrations include drowsiness and dizziness. Potential health effects also include skin or eye irritation or frostbite. The components of HFO–1234ze(E)/HFC–152a blends can cause symptoms of asphyxiation when present at sufficiently high concentrations. Excessive inhalation of the substitute may also result in an irregular heartbeat, due to cardiac effects. These potential health effects are common to many foam blowing agents. 
The AIHA has established WEELs of 
1,000 ppm for HFC–152a, and of 800 ppm for HFO–1234ze(E), both as an 8- hr TWA. EPA anticipates that users will 
be able to meet the AIHA WEELs and address potential health risks by following requirements and recommendations in the manufacturer’s SDSs and other safety precautions common to the foam blowing industry. 
Comparison to other substitutes in 
this end-use: These HFO–1234ze(E)/ HFC–152a co-blowing blends have an ODP of zero, comparable to all other acceptable substitutes in this end-use, such as HFO–1336mzz(Z)/HFC–152a blends, HFC–152a, HFO–1234ze(E), methyl formate, and CO
2.These HFO– 
1234ze(E)/HFC–152a co-blowing blends’ GWPs from about 13 to 112 are lower than or comparable to those of other acceptable substitutes in the same end- use for which we are finding them acceptable, such as HFO–1336mzz(Z)/ HFC–152a blends and HFC–152a with respective GWPs of approximately three to 110
13and 124. The GWPs of the 
HFO–1234ze(E)/HFC–152a co-blowing blends of about 13 to 112 are higher than those for acceptable alternatives such as HFO–1234ze(E), light saturated hydrocarbons C3–C6 and methyl formate, with respective GWPs of one,
14 
less than one,15and 11.16Based on 
current information, EPA anticipates that HFO–1234ze(E), light saturated hydrocarbons C3–C6 and methyl formate are not currently being used as the sole blowing agent by any U.S. manufacturers in this end-use because the individual chemicals have drawbacks such as insufficient vapor pressure, insufficient solubility in the polystyrene matrix, or high permeability resulting in low thermal resistance (‘‘R- value’’); blends such as these HFO– 1234ze(E)/HFC–152a co-blowing blends are expected to result in a feasible balance of blowing agent properties for adequate or better performance. 
Flammability and toxicity risks are 
comparable to or lower than flammability and toxicity risks of other available substitutes in the same end- use. Some acceptable substitutes in this 
end-use are flammable, like HFC–152a, light saturated hydrocarbons C3–C6, and methyl formate, while others are non-flammable. Toxicity risks can be minimized by use consistent with the 
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17WMO (World Meteorological Organization), 
Scientific Assessment of Ozone Depletion: 2018, 
Global Ozone Research and Monitoring Project— Report No. 58, 588 pp., Geneva, Switzerland, 2018. Available at: https://ozone.unep.org/sites/default/ files/2019-05/SAP-2018-Assessment-report.pdf. In 
this action, the 100-year GWP values are used. 
18WMO, 2018. 
19IPCC, 2007. 
20IPCC, 2007. 
21Sherwood et al. 2018. This paper estimated that 
water vapor emitted near Earth’s surface due to anthropogenic sources (e.g., irrigation) would have 
a GWP of ¥10
¥3to 5 × 10¥4. ‘‘The global warming 
potential of near-surface emitted water vapour,’’ Steven C. Sherwood, Vishal Dixit and Chryse ´is 
Salomez. Environ. Res. Lett. 13 (2018) 104006. 
22Bellair and Hood, 2019. Comprehensive 
evaluation of the flammability and ignitability of 
HFO–1234ze, R.J. Bellair and L. Hood, Process Safety and Environmental Protection 132 (2019) 273–284. Available online at doi.org/10.1016/ j.psep.2019.09.033. 23HFO–1336mzz(Z) and HFC–152a have GWPs of 
about two (WMO, 2018) and 124 (IPCC, 2007), respectively. If these values are weighted by mass percentage, then the blends range in GWP from about three to about 110. 
24WMO, 2018. 
25WMO, 2018. 
26WMO, 2018. AIHA’s WEELs, recommendations in the 
SDS, and other safety precautions common in the foam blowing industry. 
EPA finds blends of 10 to 90 percent 
by weight HFO–1234ze(E) and the remainder HFC–152a acceptable in the XPS end-use because they do not pose greater overall environmental and human health risk than other available substitutes in the same end-use. 
3. Blends of Zero to 100 Percent HFO– 
1234ze(E), Zero to 70 Percent Methyl Formate, Zero to 60 Percent HFC–152a, Zero to 60 Percent CO
2and Zero to 60 
Percent Water 
EPA’s decision: EPA finds blends of 
zero to 100 percent HFO–1234ze(E), zero to 70 percent methyl formate, zero to 60 percent HFC–152a, zero to 60 percent CO
2and zero to 60 percent 
water acceptable as a substitute for use as a blowing agent in: 
•Polystyrene: Extruded boardstock and 
billet These blends are hereafter referred to 
as ‘‘HFO–1234ze(E)/methyl formate/ 
HFC–152a/CO
2/water co-blowing 
blends.’’ The components of the blends are co-blown and component percentages are by weight. 
HFO–1234ze(E) is also known as 
HFC–1234ze, HFO–1234ze or trans- 1,3,3,3-tetrafluoroprop-1-ene (CAS Reg. No. 29118–24–9). Methyl formate is also known as methyl methanoate or formic acid, methyl ester (CAS Reg. No. 107– 31–3). HFC–152a, also known as 1,1- difluoroethane, has CAS Reg. No. 75– 37–6. CO
2has CAS Reg. No. 124–38–9, 
and water has CAS Reg. No. 7732–18– 5. 
You may find a copy of the 
applicant’s submission, with CBI redacted, providing the required health and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 Listing Blends of 0–100% HFO– 1234ze(E), 0–70% Methyl Formate, 0– 60% HFC–152a, 0–60% CO
2and 0–60% 
Water as a Foam Blowing Agent. SNAP Submission Received January 26, 2021.’’ EPA has performed an assessment to examine the health and environmental risks of this substitute. This assessment is available in docket EPA–HQ–OAR– 2003–0118 under the name ‘‘Risk Screen on Substitutes in Extruded Polystyrene Boardstock and Billet Foam Substitute: HFO–1234ze(E)/Methyl Formate/HFC–152a/CO
2/Water Co- 
blowing Blends for Extruded Polystyrene Foam Insulation (HFO– 1234ze(E)/Methyl Formate/HFC–152a/ CO
2/Water Co-blowing Blends).’’ Environmental information: The 
blends have an ODP of zero. Their 
components, HFO–1234ze(E), methyl formate, HFC–152a, CO
2,and water have 
GWPs of one,1711,18124,19one,20and 
less than one,21respectively. If these 
values are weighted by mass percentage, then the blends could have a GWP ranging from one to 80. HFO–1234ze(E), methyl formate, HFC–152a, CO
2, and 
water—components of the blends—are excluded from EPA’s regulatory definition of VOC under CAA regulations that address the development of SIPs to attain and maintain the NAAQS. See 40 CFR 
51.100(s). 
Flammability information: The 
components HFC–152a and methyl formate are flammable while the other components of the blends are non- flammable at standard temperature and pressure using the standard test method ASTM E681. However, at higher temperatures, such as the temperatures typical for extruding XPS, HFO– 1234ze(E) may also be flammable, particularly at higher humidity levels.
22 
Toxicity and exposure data: Potential 
health effects of these substitutes at lower concentrations include headache, nausea, drowsiness, and dizziness. The substitutes may also irritate the skin or eyes or cause frostbite. Excessive inhalation of the substitutes may also result in an irregular heartbeat, due to cardiac effects. At sufficiently high concentrations, they may cause central nervous system depression and affect respiration. The substitutes could cause asphyxiation if air is displaced by vapors in a confined space. These health effects are common to many foam blowing agents. 
The AIHA has established WEELs of 
1,000 ppm as an eight-hour time- weighted average for HFC–152a and 800 ppm for HFO–1234ze(E). Methyl formate has an Occupational Safety and Health Administration (OSHA) 
permissible exposure limits (PEL) of 100 ppm on an 8-hr TWA. CO
2has an OSHA 
PEL of 5,000 ppm on an 8-hr TWA, and a 15-minute recommended short-term exposure limit (STEL) of 30,000 ppm established by the National Institute for Occupational Safety and Health (NIOSH). EPA anticipates that users will be able to meet the AIHA WEELs, OSHA PELs, and NIOSH STEL and address potential health risks by following requirements and recommendations in the manufacturer’s SDSs and other safety precautions common to the foam blowing industry. 
Comparison to other substitutes in 
this end-use: HFO–1234ze(E)/methyl formate/HFC–152a/CO
2/water co- 
blowing blends have ODPs of zero, comparable to all other acceptable substitutes in this end-use, such as HFO–1336mzz(Z)/HFC–152a blends, HFC–152a, HFO–1234ze(E), methyl formate, and CO
2. 
The GWPs of the HFO–1234ze(E)/ 
methyl formate/HFC–152a/CO 2/water 
co-blowing blends, ranging from approximately one to 80, are lower than HFC–152a’s GWP of 124 and are comparable to or lower than those for HFO–1336mzz(Z)/HFC–152a blends (three to 110
23). The worst-case GWPs 
of the HFO–1234ze(E)/methyl formate/ HFC–152a/CO
2/water co-blowing blends 
are higher than those for acceptable alternatives such as HFO–1234ze(E), light saturated hydrocarbons C3–C6 and methyl formate, with respective GWPs of less than one,
24less than one,25and 
11,26while the GWP at the low end of 
the range of approximately one is comparable to those acceptable alternatives. Based on current information, EPA anticipates that HFO– 1234ze(E), light saturated hydrocarbons C3–C6 and methyl formate are not currently being used as the sole blowing agent by any U.S. manufacturers in this end-use because the individual chemicals have drawbacks such as insufficient vapor pressure, insufficient solubility in the polystyrene matrix, or high permeability resulting in low thermal resistance (‘‘R-value’’); blends such as these HFO–1234ze(E)/methyl formate/HFC–152a/CO
2/water co- 
blowing blends are expected to result in a feasible balance of blowing agent 
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27Kazuaki Tokuhashi, Tadafumi Uchimaru, Kenji 
Takizawa, and Shigeo Kondo, 2018. Rate Constants 
for the Reactions of OH Radical with the (E)/(Z) Isomers of CF
3CF=CHCl and CHF 2CF=CHCl (J.Phys. 
Chem. A 2018, 122, 3120–3127) (Tokuhashi et al., 2018). properties for adequate or better 
performance. 
Flammability and toxicity risks of the 
HFO–1234ze(E)/methyl formate/HFC– 152a/CO
2/water co-blowing blends are 
comparable to or lower than flammability and toxicity risks of other available substitutes in the same end- use. Some acceptable substitutes in this end-use are flammable, like HFC–152a, light saturated hydrocarbons C3–C6, and methyl formate, while others are non-flammable. Toxicity risks can be minimized by use consistent with the AIHA WEELs, OSHA PELs, NIOSH STEL, recommendations in the manufacturer’s SDSs, and other safety precautions common in the foam- blowing industry. 
EPA finds HFO–1234ze(E)/methyl 
formate/HFC–152a/CO
2/water co- 
blowing blends acceptable in the XPS end-use because they do not pose greater overall environmental and human health risk than other available substitutes in the same end-use. 
C. Aerosols 1. HCFO–1233yd(Z) 
EPA’s decision: EPA finds HCFO– 
1233yd(Z) acceptable as a substitute for 
use in: 
•Aerosol solvents 
HCFO–1233yd(Z) is also known as 
(Z)-1-Chloro-2,3,3-trifluoropropene 
(CAS Reg. No. 1263679–68–0). 
You may find a copy of the 
applicant’s submission, with CBI redacted, providing the required health and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 Listing of HCFO–1233yd(Z) in Cleaning Solvents, Aerosol Solvents, and Coatings. SNAP Submission Received March 12, 2019.’’ EPA performed an assessment to examine the health and environmental risks of this substitute. This assessment is available in Docket EPA–HQ–OAR–2003–0118: 
•‘‘Risk Screen on Substitutes in 
Aerosol Solvents. Substitute: HCFO– 1233yd(Z).’’ 
Environmental information: HCFO– 
1233yd(Z) has an ODP of 0.00003 and a GWP of less than 1.
27Under CAA 
regulations (see 40 CFR 51.100(s)) defining VOC for the purpose of addressing the development of SIPs to attain and maintain the NAAQS, HCFO– 1233yd(Z) would be considered a VOC. 
That definition provides that ‘‘any compound of carbon’’ which ‘‘participates in atmospheric photochemical reactions’’ is considered a VOC unless expressly excluded in that provision based on a determination of ‘‘negligible photochemical reactivity.’’ The manufacturer has petitioned EPA to exclude HCFO–1233yd(Z) from the definition of VOC under those regulations. EPA has not yet taken action on that petition. This substitute is subject to a Toxic Substance Control Act (TSCA) section 5(a)(2) Significant New Use Rule (SNUR). 
Flammability information: HCFO– 
1233yd(Z) is not flammable. 
Toxicity and exposure data: Potential 
health effects of exposure to this substitute include drowsiness or dizziness. The substitute may also irritate the skin or eyes. The substitute could cause asphyxiation if air is displaced by vapors in a confined space. These potential health effects are common to many aerosol solvents. 
The manufacturer recommends an 
acceptable exposure limit (AEL) for the 
workplace of 250 ppm on an 8-hr TWA for HCFO–1233yd(Z). EPA anticipates that users will be able to meet the manufacturer’s AEL and address potential health risks by following requirements and recommendations in the manufacturer’s SDS, and other safety precautions common to the aerosol industry. 
Comparison to other substitutes in 
this end-use: HCFO–1233yd(Z) has an ODP of less than 0.00003, comparable to or less than other listed substitutes in this end-use with ODPs ranging from zero to 0.033. 
HCFO–1233yd(Z)’s GWP of less than 
one is lower than that of other acceptable substitutes such as HFE– 7200, HFE–347mcc3, HFC–365mfc and HFC–4310mee with GWPs ranging from 59 to 1,640. HCFO–1233yd(Z)’s GWP is lower than or comparable to the GWPs of other acceptable substitutes for aerosol solvents, including acetone, methoxytridecafluoroheptene isomers (MPHE), and trans-1-chloro-3,3,3- trifluoroprop-1-ene with GWPs ranging from less than one to seven. 
Some acceptable substitutes in this 
end-use are VOC, like HCFO–1233yd(Z), while others are excluded from the definition of VOC. 
Flammability and toxicity risks are 
comparable to or lower than flammability and toxicity risks of other available substitutes in the same end- use. Toxicity risks can be minimized by use consistent with the manufacturer’s AEL, industry standards, recommendations in the manufacturer’s SDS, and other safety precautions common in the aerosol industry. 
EPA finds HCFO–1233yd(Z) 
acceptable in the aerosol solvent end- use because it does not pose greater overall environmental and human health risk than other available substitutes in the same end-use. 
D. Cleaning Solvents 1. HCFO–1233yd(Z) 
EPA’s decision: EPA finds HCFO– 
1233yd(Z) acceptable as a substitute for 
use in: 
•Electronics cleaning 
•Metals cleaning 
•Precision cleaning 
HCFO–1233yd(Z) is also known as 
(Z)-1-chloro-2,3,3-trifluoropropene (CAS 
Reg. No. 1263679–68–0). 
You may find a copy of the 
applicant’s submission, with CBI redacted, providing the required health and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 Listing of HCFO–1233yd(Z) in Cleaning Solvents, Aerosol Solvents, and Coatings. SNAP Submission Received March 12, 2019.’’ EPA performed an assessment to examine the health and environmental risks of this substitute. This assessment is available in Docket EPA–HQ–OAR–2003–0118: 
•‘‘Risk Screen on Substitutes in 
Electronics Cleaning, Metals Cleaning, and Precision Cleaning. Substitute: HCFO–1233yd(Z).’’ 
Environmental information: The 
environmental information for this substitute is set forth in the ‘‘Environmental information’’ section in listing in I.C.1. above. 
Flammability information: HCFO– 
1233yd(Z) is not flammable. 
Toxicity and exposure data: The 
toxicity information for this substitute is set forth in the ‘‘Toxicity and exposure data’’ section in listing I.C.1. above. 
Comparison to other substitutes in 
these end-uses: HCFO–1233yd(Z) has an ODP of less than 0.00003, comparable to or less than other listed substitutes in the metals cleaning, electronics cleaning, and precision cleaning end- uses with ODPs ranging from zero to 0.033. 
HCFO–1233yd(Z)’s GWP of less than 
1 is lower than that of other acceptable substitutes such as HFE–7200, HFE– 7100, HFC–365mfc and HFC–4310mee with GWPs ranging from 59 to 1,640. HCFO–1233yd(Z)’s GWP is lower than or comparable to the GWPs of other acceptable substitutes for cleaning solvents, including acetone, MPHE, and 
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trans-1-chloro-3,3,3-trifluoroprop-1-ene 
with GWPs ranging from less than one to seven. 
Some acceptable substitutes in these 
end-uses are VOC, like HCFO– 1233yd(Z), while others are excluded from the definition of VOC. 
Flammability and toxicity risks are 
comparable to or lower than flammability and toxicity risks of other available substitutes in the same end- use. Toxicity risks can be minimized by use consistent with the manufacturer’s AEL, recommendations in the manufacturer’s SDS, and other safety precautions common in the cleaning solvents industry. 
EPA finds HCFO–1233yd(Z) 
acceptable in the end-uses listed above because it does not pose greater overall environmental and human health risk than other available substitutes in the same end-uses. 
E. Adhesives, Coatings, and Inks 1. HCFO–1233yd(Z) 
EPA’s decision: EPA finds HCFO– 
1233yd(Z) acceptable as a substitute for 
use as a carrier solvent in: 
•Coatings 
HCFO–1233yd(Z) is also known as 
(Z)-1-chloro-2,3,3-trifluoropropene (CAS 
Reg. No. 1263679–68–0). 
You may find a copy of the 
applicant’s submission, with CBI 
redacted, providing the required health and environmental information for this substitute in this end-use in Docket EPA–HQ–OAR–2003–0118 at www.regulations.gov under the name, 
‘‘Supporting Materials for Notice 37 Listing of HCFO–1233yd(Z) in Cleaning Solvents, Aerosol Solvents, and Coatings. SNAP Submission Received March 12, 2019.’’ EPA performed an assessment to examine the health and environmental risks of this substitute. This assessment is available in Docket EPA–HQ–OAR–2003–0118: 
•‘‘Risk Screen on Substitutes in 
Coatings. Substitute: HCFO–1233yd(Z).’’ 
Environmental information: The 
environmental information for this substitute is set forth in the ‘‘Environmental information’’ section in listing I.C.1., above. 
Flammability information: HCFO– 
1233yd(Z) is not flammable. 
Toxicity and exposure data: The 
toxicity information for this substitute is set forth in the ‘‘Toxicity and exposure data’’ section in listing I.C.1., above. 
Comparison to other substitutes in 
these end-uses: HCFO–1233yd(Z) has an ODP of less than 0.00003, comparable to or less than other listed substitutes in this end-use with ODPs ranging from zero to 0.00034. 
For coatings, HCFO–1233yd(Z)’s GWP 
of less than one is lower than that of other acceptable substitutes such as HFE–7200 and HFE–7100 with GWPs ranging from 59 to 297. HCFO– 1233yd(Z)’s GWP is lower than or comparable to the GWPs of other acceptable substitutes for coatings, including acetone, MPHE, and trans-1- chloro-3,3,3-trifluoroprop-1-ene with GWPs ranging from less than one to seven. Some acceptable substitutes in this end-use are VOC, like HCFO– 1233yd(Z), while others are excluded from the definition of VOC. 
Flammability and toxicity risks are 
comparable to or lower than flammability and toxicity risks of other available substitutes in the same end- use. Toxicity risks can be minimized by use consistent with the manufacturer’s AEL, recommendations in the manufacturer’s SDS, and other safety precautions common in the coatings industry. 
EPA finds HCFO–1233yd(Z) 
acceptable in the coatings end-use because it does not pose greater overall environmental and human health risk than other available substitutes in the same end-use. 
List of Subjects in 40 CFR Part 82 
Environmental protection, 
Administrative practice and procedure, 
Air pollution control, Reporting and recordkeeping requirements. 
Hans Christopher Grundler, 
Director, Office of Atmospheric Programs. 
Appendix A: Summary of Decisions for 
New Acceptable Substitutes 
REFRIGERATION AND AIRCONDITIONING  
End-use Substitute Decision Further information1 
Cold Storage Ware-
houses (new equip-
ment only).HCFO–1233zd(E) ....... Acceptable ............ HCFO–1233zd(E) is also known as trans-1-chloro-3,3,3-trifluoroprop-1-ene (Chemical Ab-
stracts Service Registry Number [CAS Reg. No.] 102687–65–0). 
HCFO–1233zd(E) has an ozone depletion potential (ODP) of less than 0.0004 and a 100- 
year integrated global warming potential (GWP) of about 3.7. 
HCFO–1233zd(E) is nonflammable. The Workplace Environmental Exposure Limits (WEEL) committee of the Occupational Alli-
ance for Risk Science (OARS) has established a WEEL of 800 ppm as an eight-hour time-weighted average (8-hr TWA) for HCFO–1233zd(E). 
Ice Skating Rinks (new 
equipment only).HCFO–1233zd(E) ....... Acceptable ............ HCFO–1233zd(E) is also known as trans-1-chloro-3,3,3-trifluoroprop-1-ene (CAS Reg. No. 
102687–65–0). 
HCFO–1233zd(E) has an ODP of less than 0.0004 and a GWP of about 3.7. HCFO–1233zd(E) is nonflammable. OARS has established a WEEL of 800 ppm on an 8-hr TWA for HCFO–1233zd(E). 
Industrial Process Air 
Conditioning (new equipment only).HCFO–1233zd(E) ....... Acceptable ............ HCFO–1233zd(E) is also known as trans-1-chloro-3,3,3-trifluoroprop-1-ene (CAS Reg. No. 
102687–65–0). 
HCFO–1233zd(E) has an ODP of less than 0.0004 and a GWP of about 3.7. HCFO–1233zd(E) is nonflammable. OARS has established a WEEL of 800 ppm on an 8-hr TWA for HCFO–1233zd(E). 
1See recommendations in the manufacturer’s SDS and guidance for all listed refrigerants. 
FOAM BLOWING AGENTS  
End-use Substitute Decision Further information1 
Extruded Polystyrene: 
Boardstock and Billet.Blends of 10 to 90 
percent HFO– 1234ze(E) by weight and the remainder HCFO–1233zd(E).Acceptable ............ This substitute is blends of 10 to 90 percent HFO–1234ze(E) by weight and the remainder 
HCFO–1233zd(E). HFO–1234ze(E) is also called 1,3,3,3-tetrafluoropropene(E), or trans- 1,3,3,3-tetrafluoropropene (Chemical Abstracts Service Registry Number [CAS Reg. No.] 29118–24–9). HCFO–1233zd(E) is also called trans-1-chloro-3,3,3-trifluoro-prop-1-ene (CAS Reg. No. 102687–65–0). 
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FOAM BLOWING AGENTS —Continued 
End-use Substitute Decision Further information1 
HFO–1234ze(E) has a 100-year integrated global warming potential (GWP) of less than 
one. 
HCFO–1233zd(E) has an ozone depletion potential (ODP) of less than 0.0004 and a GWP 
of 3.7. The blends have an ODP ranging from less than 0.0004 to less than 0.00004 and 
range in GWP from about 1.3 to about 3.4. 
HFO–1234ze(E) is not flammable at standard temperature and pressure, however, how-
ever, at higher temperatures, such as the temperatures typical for extruding extruded pol-ystyrene: boardstock and billet (XPS), HFO–1234ze(E) may be flammable, particularly at higher humidity levels. HCFO–1233zd(E) is non-flammable. 
The American Industrial Hygiene Association (AIHA) has established a Workplace Environ-
mental Exposure Limit (WEEL) of 800 ppm as an eight-hour time-weighted average (8-hr TWA) for HFO–1234ze(E), and the Occupational Alliance for Risk Sciences (OARS) has established a WEEL of 800 ppm as an 8-hr TWA for HCFO–1233zd(E). 
Extruded Polystyrene: 
Boardstock and Billet.Blends of 10 to 90 
percent HFO– 1234ze(E) by weight and the remainder HFC–152a.Acceptable ............ This substitute is blends of 10 to 90 Percent HFO–1234ze(E) by weight and the remainder 
HFC–152a. HFO–1234ze(E) is also called 1,3,3,3-tetrafluoropropene (E), or trans-1,3,3,3- tetrafluoropropene (CAS Reg. No. 29118–24–9). HFC–152a is also called 1,1- difluoroethane (CAS Reg. No. 75–37–6). 
The blend and its components have an ODP of zero. HFO–1234ze(E) has a GWP of less 
than one and HFC–152a has a GWP of 124. The blends range in GWP from about 13 to about 112. 
HFO–1234ze(E) is not flammable at standard temperature and pressure, however, at high-
er temperatures, such as the temperatures typical for extruding XPS, HFO–1234ze(E) may be flammable, particularly at higher humidity levels. HFC–152a is flammable at standard temperature and pressure. 
The AIHA has established a WEEL of 1,000 ppm for HFC–152a and a WEEL of 800 ppm 
for HFO–1234ze(E), both as an 8-hr TWA. 
Extruded Polystyrene: 
Boardstock and Billet.Blends of 0–100% 
HFO–1234ze(E), 0– 70% Methyl For-mate, 0–60% HFC– 152a, 0–60% CO
2 
and 0–60% Water.Acceptable ............ This substitute is blends of 0–100% HFO–1234ze(E), 0–70% methyl formate, 0–60% HFC– 
152a, 0–60% CO 2and 0–60% water. HFO–1234ze(E) is also called 1,3,3,3- 
tetrafluoropropene (E), or trans-1,3,3,3-tetrafluoropropene (CAS Reg. No. 29118–24–9). Methyl formate is also called methyl methanoate or formic acid, methyl ester (CAS Reg. No. 107–31–3). HFC–152a is also called 1,1-difluoroethane, has CAS Reg. No. 75–37–6. CO
2has CAS Reg. No. 124–38–9, and water has CAS Reg. No. 7732–18–5. 
HFO–1234ze(E) and water have GWPs of less than one, CO 2has a GWP of one, methyl 
formate has a GWP of 11, and HFC–152a has a GWP of 124. The blends range in GWP from approximately one to 80. 
HFO–1234ze(E) is not flammable at standard temperature and pressure; however, at high-
er temperatures, such as the temperatures typical for extruding XPS, HFO–1234ze(E) may be flammable, particularly at higher humidity levels. HFC–152a and methyl formate are flammable at standard temperature and pressure. 
The AIHA has established a WEEL of 1,000 ppm for HFC–152a and a WEEL of 800 ppm 
for HFO–1234ze(E), both as an 8-hr TWA. 
1See recommendations in the manufacturer’s SDS and guidance for all listed foam blowing agents. 
CLEANING SOLVENTS  
End-use Substitute Decision Further information1 
Electronics cleaning, 
metals cleaning, preci-sion cleaning.HCFO–1233yd(Z) ....... Acceptable ............ HCFO–1233yd(Z) is also known as (Z)-1-chloro-2,3,3-trifluoropropene (CAS Reg. No. 
1263679–68–0). 
HCFO–1233yd(Z) has an ozone depletion potential (ODP) of 0.00003 and a global warming 
potential (GWP) of less than 1. 
This compound is nonflammable. 
The manufacturer recommends an acceptable exposure limit (AEL) for the workplace for 
HCFO–1233yd(Z) of 250 ppm on an eight-hour time-weighted average (8-hr TWA). 
This substitute is subject to a Toxic Substances Control Act (TSCA) section 5(a)(2) Signifi-
cant New Use Rule (SNUR). 
1See recommendations in the manufacturer’s SDS and guidance for all listed cleaning solvents. 
AEROSOLS  
End-use Substitute Decision Further information1 
Aerosol solvents ............ HCFO–1233yd(Z) ....... Acceptable ............ HCFO–1233yd(Z) is also known as (Z)-1-chloro-2,3,3-trifluoropropene (CAS Reg. No. 
1263679–68–0). 
HCFO–1233yd(Z) has an ozone depleting potential (ODP) of 0.00003 and a global warming 
potential (GWP) of less than 1. 
This compound is nonflammable. 
The manufacturer recommends an acceptable exposure limit (AEL) for the workplace for 
HCFO–1233yd(Z) of 250 ppm on an eight-hour time-weighted average (8-hr TWA). 
This substitute is subject to a Toxic Substances Control Act (TSCA) section 5(a)(2) Signifi-
cant New Use Rule (SNUR). 
1See recommendations in the manufacturer’s SDS and guidance for all listed aerosols. 
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ADHESIVES , COATINGS , ANDINKS 
End-use Substitute Decision Further information1 
Coatings ........................ HCFO–1233yd(Z) ....... Acceptable ............ HCFO–1233yd(Z) is also known as (Z)-1-chloro-2,3,3-trifluoropropene (CAS Reg. No. 
1263679–68–0). 
HCFO–1233yd(Z) has an ozone depleting potential (ODP) of 0.00003 and a global warming 
potential (GWP) of less than 1. 
This compound is nonflammable. 
The manufacturer recommends an acceptable exposure limit (AEL) for the workplace for 
HCFO–1233yd(Z) of 250 ppm on an eight-hour time-weighted average (8-hr TWA). 
This substitute is subject to a Toxic Substance Control Act (TSCA) section 5(a)(2) Signifi-
cant New Use Rule (SNUR). 
1See recommendations in the manufacturer’s SDS and guidance for all listed carrier solvents for adhesives, coatings, and inks. 
[FR Doc. 2022–00998 Filed 1–19–22; 8:45 am] 
BILLING CODE 6560–50–P 
FEDERAL COMMUNICATIONS 
COMMISSION 
47 CFR Part 73 
[MB Docket No. 21–126; RM–11893; DA 22– 
25; FR ID 67334] 
Television Broadcasting Services 
Monroe, Louisiana 
AGENCY : Federal Communications 
Commission. 
ACTION : Final rule. 
SUMMARY : On September 22, 2021, the 
Media Bureau, Video Division (Bureau) issued a Notice of Proposed Rulemaking (NPRM) in response to a petition for rulemaking filed by Gray Television Licensee, LLC (Petitioner), the licensee of KNOE–TV, channel 8, Monroe, Louisiana, requesting the substitution of channel 24 for channel 8 at Monroe in the Table of Allotments. For the reasons set forth in the Report and Order referenced below, the Bureau amends FCC regulations to substitute channel 24 for channel 8 at Monroe. 
DATES : Effective January 20, 2022. 
FOR FURTHER INFORMATION CONTACT : 
Joyce Bernstein, Media Bureau, at (202) 418–1647 or Joyce.Bernstein@fcc.gov. 
SUPPLEMENTARY INFORMATION : The 
proposed rule was published at 86 FR 54417 on October 1, 2021. The Petitioner filed comments in support of the petition reaffirming its commitment to apply for channel 24. The Petitioner states that the Commission has recognized the deleterious effects of manmade noise from nearby electrical devices including on the reception of digital VHF signals and that the propagation characteristics of VHF channels allow undesired signals and noise to be receivable at relatively farther distances compared to UHF channels. In addition, no existing viewers will lose service and an additional 12,868 persons would gain service if the channel substitution is granted. 
This is a synopsis of the 
Commission’s Report and Order, MB 
Docket No. 21–126; RM–11893; DA 22– 25, adopted January 11, 2022, and released January 11, 2022. The full text of this document is available for download at https://www.fcc.gov/edocs. To request materials in accessible formats for people with disabilities (braille, large print, electronic files, audio format), send an email to fcc504@fcc.gov or call the Consumer & 
Governmental Affairs Bureau at 202– 418–0530 (voice), 202–418–0432 (tty). 
This document does not contain 
information collection requirements subject to the Paperwork Reduction Act of 1995, Public Law 104–13. In addition, therefore, it does not contain any proposed information collection burden ‘‘for small business concerns with fewer than 25 employees,’’ pursuant to the Small Business Paperwork Relief Act of 2002, Public Law 107–198, see 44 U.S.C. 
3506(c)(4). Provisions of the Regulatory Flexibility Act of 1980, 5 U.S.C. 601– 612, do not apply to this proceeding. 
The Commission will send a copy of 
this Report and Order in a report to be 
sent to Congress and the Government Accountability Office pursuant to the Congressional Review Act, see 5 U.S.C. 
801(a)(1)(A). 
List of Subjects in 47 CFR Part 73 
Television. 
Federal Communications Commission. 
Thomas Horan, Chief of Staff, Media Bureau. 
Final Rule 
For the reasons discussed in the 
preamble, the Federal Communications 
Commission amends 47 CFR part 73 as follows: 
PART 73—RADIO BROADCAST 
SERVICE 
■1. The authority citation for part 73 
continues to read as follows: 
Authority: 47 U.S.C. 154, 155, 301, 303, 
307, 309, 310, 334, 336, 339. ■2. In § 73.622(j), amend the Table of 
Allotments, under Louisiana, by revising the entry for Monroe to read as follows: 
§ 73.622 Digital television table of 
allotments. 
* * * * * 
(j) * * * 
Community Channel No. 
*****  
LOUISIANA 
*****  
Monroe .................................. * 13, 24 
*****  
[FR Doc. 2022–01001 Filed 1–19–22; 8:45 am] 
BILLING CODE 6712–01–P 
DEPARTMENT OF COMMERCE 
National Oceanic and Atmospheric 
Administration 
50 CFR Part 665 
[Docket No. 220113–0014] 
RIN 0648- BK72 
Pacific Island Fisheries; Annual Catch 
Limit and Accountability Measures; Main Hawaiian Islands Deep 7 Bottomfish for Fishing Years 2021– 2024 
AGENCY : National Marine Fisheries 
Service (NMFS), National Oceanic and Atmospheric Administration (NOAA), Commerce. 
ACTION : Final rule. 
SUMMARY : In this final rule, NMFS 
implements an annual catch limit (ACL) of 492,000 lb (223,167 kg) for Deep 7 bottomfish in the main Hawaiian Islands (MHI) for each of the three fishing years 2021–22, 2022–23, and 2023–24. As an in-season accountability measure (AM), if NMFS projects that the 
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