and must extend a
                                                                     minimum of one (1)
                                                                     inch in both
                                                                     directions from such
                                                                     locations.
Very low temperature            Propane (R-290).  Acceptable,       As of [date 30 days    Applicable OSHA
 refrigeration equipment (new                      subject to use    after publication of   requirements at 29
 only).                                            conditions.       final rule]:           CFR part 1910 must
                                                                    This refrigerant may    be followed,
                                                                     be used only in new    including those at
                                                                     equipment designed     29 CFR 1910.94
                                                                     specifically and       (ventilation) and
                                                                     clearly identified     1910.106 (flammable
                                                                     for the refrigerant--  and combustible
                                                                     i.e., this             liquids), 1910.110
                                                                     refrigerant may not    (storage and
                                                                     be used as a           handling of
                                                                     conversion or          liquefied petroleum
                                                                     ``retrofit''           gases), 1910.157
                                                                     refrigerant for        (portable fire
                                                                     existing equipment..   extinguishers), and
                                                                                1910.1000 (toxic and
                                                                                hazardous
                                                                                substances).
                                                                    This refrigerant may   Proper ventilation
                                                                     only be used in        should be maintained
                                                                     equipment that meets   at all times during
                                                                     all requirements in    the manufacture and
                                                                     Supplement SB to UL    storage of equipment
                                                                     471.1 2 4 In cases     containing
                                                                     where the final rule   hydrocarbon
                                                                     includes               refrigerants through
                                                                     requirements more      adherence to good
                                                                     stringent than those   manufacturing
                                                                     of UL 471, the         practices as per 29
                                                                     appliance must meet    CFR 1910.106. If
                                                                     the requirements of    refrigerant levels
                                                                     the final rule in      in the air
                                                                     place of the           surrounding the
                                                                     requirements in the    equipment rise above
                                                                     UL Standard.           one-fourth of the
                                                                    The charge size for     lower flammability
                                                                     the equipment must     limit, the space
                                                                     not exceed 150 grams   should be evacuated
                                                                     (5.29 ounces) in       and re-entry should
                                                                     each refrigerant       occur only after the
                                                                     circuit of the very    space has been
                                                                     low temperature        properly ventilated.
                                                                     refrigeration
                                                                     equipment..
                                                                    As provided in         Technicians and
                                                                     clauses SB6.1.2 to     equipment
                                                                     SB6.1.5 of UL 471,     manufacturers should
                                                                     the following          wear appropriate
                                                                     markings must be       personal protective
                                                                     attached at the        equipment, including
                                                                     locations provided     chemical goggles and
                                                                     and must be            protective gloves,
                                                                     permanent:             when handling
                                                                    (a) ``DANGER--Risk of   ethane. Special care
                                                                     Fire or Explosion.     should be taken to
                                                                     Flammable              avoid contact with
                                                                     Refrigerant Used. Do   the skin since
                                                                     Not Use Mechanical     ethane, like many
                                                                     Devices To Defrost     refrigerants, can
                                                                     Refrigerator. Do Not   cause freeze burns
                                                                     Puncture Refrigerant   on the skin.
                                                                     Tubing.'' This        A Class B dry powder
                                                                     marking must be        type fire
                                                                     provided on or near    extinguisher should
                                                                     any evaporators that   be kept nearby.
                                                                     can be contacted by
                                                                     the consumer..
                                                                    (b) ``DANGER--Risk of  Technicians should
                                                                     Fire or Explosion.     only use spark-proof
                                                                     Flammable              tools when working
                                                                     Refrigerant Used. To   on equipment with
                                                                     Be Repaired Only By    flammable
                                                                     Trained Service        refrigerants.
                                                                     Personnel. Do Not     Any recovery
                                                                     Puncture Refrigerant   equipment used
                                                                     Tubing.'' This         should be designed
                                                                     marking must be        for flammable
                                                                     located near the       refrigerants. Any
                                                                     machine compartment.   refrigerant releases
                                                                    (c) ``CAUTION--Risk     should be in a well-
                                                                     of Fire or             ventilated area,
                                                                     Explosion. Flammable   such as outside of a
                                                                     Refrigerant Used.      building. Only
                                                                     Consult Repair         technicians
                                                                     Manual/Owner's Guide   specifically trained
                                                                     Before Attempting To   in handling
                                                                     Service This           flammable
                                                                     Product. All Safety    refrigerants should
                                                                     Precautions Must be    service equipment
                                                                     Followed.'' This       containing ethane.
                                                                     marking must be        Technicians should
                                                                     located near the       gain an
                                                                     machine compartment..  understanding of
                                                                                minimizing the risk
                                                                                of fire and the
                                                                                steps to use
                                                                                flammable
                                                                                refrigerants safely.
                                                                    (d) ``CAUTION--Risk    Room occupants should
                                                                     of Fire or             evacuate the space
                                                                     Explosion. Dispose     immediately
                                                                     of Properly In         following the
                                                                     Accordance With        accidental release
                                                                     Federal Or Local       of this refrigerant.
                                                                     Regulations.          If a service port is
                                                                     Flammable              added then retail
                                                                     Refrigerant Used.''    food refrigerators
                                                                     This marking must be   and freezers using
                                                                     provided on the        these refrigerants
                                                                     exterior of the        should have service
                                                                     refrigeration          aperture fittings
                                                                     equipment.             that differ from
                                                                    (e) ``CAUTION--Risk     fittings used in
                                                                     of Fire or Explosion   equipment or
                                                                     Due To Puncture Of     containers using non-
                                                                     Refrigerant Tubing;    flammable
                                                                     Follow Handling        refrigerant.
                                                                     Instructions           ``Differ'' means
                                                                     Carefully. Flammable   that either the
                                                                     Refrigerant Used.''    diameter differs by
                                                                     This marking must be   at least \1/16\ inch
                                                                     provided near all      or the thread
                                                                     exposed refrigerant    direction is
                                                                     tubing..               reversed (i.e.,
                                                                    All of these markings   right-handed vs.
                                                                     must be in letters     left-handed). These
                                                                     no less than 6.4 mm    different fittings
                                                                     (\1/4\ inch) high.     should be
                                                                                permanently affixed
                                                                                to the unit at the
                                                                                point of service and
                                                                                maintained until the
                                                                                end-of-life of the
                                                                                unit, and should not
                                                                                be accessed with an
                                                                                adaptor.

                                                                    The equipment must     Very low temperature
                                                                     have red PMS #185      equipment using
                                                                     marked pipes, hoses,   propane may also use
                                                                     or other devices       another acceptable
                                                                     through which the      refrigerant
                                                                     refrigerant passes,    substitute in a
                                                                     to indicate the use    separate refrigerant
                                                                     of a flammable         circuit or stage
                                                                     refrigerant. This      (e.g., one
                                                                     color must be          temperature stage
                                                                     applied at all         with propane and a
                                                                     service ports and      second stage with
                                                                     other parts of the     ethane).
                                                                     system where service
                                                                     puncturing or other
                                                                     actions creating an
                                                                     opening from the
                                                                     refrigerant circuit
                                                                     to the atmosphere
                                                                     might be expected
                                                                     and must extend a
                                                                     minimum of one (1)
                                                                     inch in both
                                                                     directions from such
                                                                     locations.
Water coolers (new only)......  Propane (R-290).  Acceptable,       As of [date 30 days    Applicable OSHA
                                                   subject to use    after publication of   requirements at 29
                                                   conditions.       final rule]:           CFR part 1910 must
                                                                    This refrigerant may    be followed,
                                                                     be used only in new    including those at
                                                                     equipment designed     29 CFR 1910.94
                                                                     specifically and       (ventilation) and
                                                                     clearly identified     1910.106 (flammable
                                                                     for the refrigerant--  and combustible
                                                                     i.e., this             liquids), 1910.110
                                                                     refrigerant may not    (storage and
                                                                     be used as a           handling of
                                                                     conversion or          liquefied petroleum
                                                                     ``retrofit''           gases), 1910.157
                                                                     refrigerant for        (portable fire
                                                                     existing equipment..   extinguishers), and
                                                                                1910.1000 (toxic and
                                                                                hazardous
                                                                                substances).
                                                                    This refrigerant may   Proper ventilation
                                                                     be used only in        should be maintained
                                                                     water coolers that     at all times during
                                                                     meet all               the manufacture and
                                                                     requirements listed    storage of equipment
                                                                     in Supplement SB to    containing
                                                                     UL 399 1 2 3 In        hydrocarbon
                                                                     cases where the rule   refrigerants through
                                                                     includes               adherence to good
                                                                     requirements more      manufacturing
                                                                     stringent than those   practices as per 29
                                                                     of the UL 399, the     CFR 1910.106. If
                                                                     appliance must meet    refrigerant levels
                                                                     the requirements of    in the air
                                                                     the final rule in      surrounding the
                                                                     place of the           equipment rise above
                                                                     requirements in the    one-fourth of the
                                                                     UL Standard.           lower flammability
                                                                    The charge size must    limit, the space
                                                                     not exceed 150 grams   should be evacuated
                                                                     (5.29 ounces) per      and re-entry should
                                                                     refrigerant circuit    occur only after the
                                                                     in the water cooler..  space has been
                                                                                properly ventilated.
                                                                    The equipment must     Technicians and
                                                                     have red PMS #185      equipment
                                                                     marked pipes, hoses,   manufacturers should
                                                                     or other devices       wear appropriate
                                                                     through which the      personal protective
                                                                     refrigerant passes,    equipment, including
                                                                     to indicate the use    chemical goggles and
                                                                     of a flammable         protective gloves,
                                                                     refrigerant. This      when handling
                                                                     color must be          ethane. Special care
                                                                     applied at all         should be taken to
                                                                     service ports and      avoid contact with
                                                                     other parts of the     the skin since
                                                                     system where service   ethane, like many
                                                                     puncturing or other    refrigerants, can
                                                                     actions creating an    cause freeze burns
                                                                     opening from the       on the skin.
                                                                     refrigerant circuit   A Class B dry powder
                                                                     to the atmosphere      type fire
                                                                     might be expected      extinguisher should
                                                                     and must extend a      be kept nearby.
                                                                     minimum of one (1)
                                                                     inch in both
                                                                     directions from such
                                                                     locations. As
                                                                     provided in clauses
                                                                     SB6.1.2 to SB6.1.5
                                                                     of UL 399, the
                                                                     following markings
                                                                     must be attached at
                                                                     the locations
                                                                     provided and must be
                                                                     permanent:
                                                                    (a) ``DANGER--Risk of  Technicians should
                                                                     Fire or Explosion.     only use spark-proof
                                                                     Flammable              tools when working
                                                                     Refrigerant Used. Do   on equipment with
                                                                     Not Use Mechanical     flammable
                                                                     Devices To Defrost     refrigerants.
                                                                     Refrigerator. Do Not  Any recovery
                                                                     Puncture Refrigerant   equipment used
                                                                     Tubing.'' This         should be designed
                                                                     marking must be        for flammable
                                                                     provided on or near    refrigerants.
                                                                     any evaporators that  Any refrigerant
                                                                     can be contacted by    releases should be
                                                                     the consumer.          in a well-ventilated
                                                                    (b) ``DANGER--Risk of   area, such as
                                                                     Fire or Explosion.     outside of a
                                                                     Flammable              building. Only
                                                                     Refrigerant Used. To   technicians
                                                                     Be Repaired Only By    specifically trained
                                                                     Trained Service        in handling
                                                                     Personnel. Do Not      flammable
                                                                     Puncture Refrigerant   refrigerants should
                                                                     Tubing.'' This         service equipment
                                                                     marking must be        containing ethane.
                                                                     located near the       Technicians should
                                                                     machine compartment..  gain an
                                                                                understanding of
                                                                                minimizing the risk
                                                                                of fire and the
                                                                                steps to use
                                                                                flammable
                                                                                refrigerants safely.
                                                                    (c) ``CAUTION--Risk    Room occupants should
                                                                     of Fire or             evacuate the space
                                                                     Explosion. Flammable   immediately
                                                                     Refrigerant Used.      following the
                                                                     Consult Repair         accidental release
                                                                     Manual/Owner's Guide   of this refrigerant.
                                                                     Before Attempting To
                                                                     Service This
                                                                     Product. All Safety
                                                                     Precautions Must be
                                                                     Followed.'' This
                                                                     marking must be
                                                                     located near the
                                                                     machine compartment.

                                                                    (d) ``CAUTION--Risk    If a service port is
                                                                     of Fire or             added then retail
                                                                     Explosion. Dispose     food refrigerators
                                                                     of Properly In         and freezers using
                                                                     Accordance With        these refrigerants
                                                                     Federal Or Local       should have service
                                                                     Regulations.           aperture fittings
                                                                     Flammable              that differ from
                                                                     Refrigerant Used.''    fittings used in
                                                                     This marking must be   equipment or
                                                                     provided on the        containers using non-
                                                                     exterior of the        flammable
                                                                     refrigeration          refrigerant.
                                                                     equipment.             ``Differ'' means
                                                                    (e) ``CAUTION--Risk     that either the
                                                                     of Fire or Explosion   diameter differs by
                                                                     Due To Puncture Of     at least \1/16\ inch
                                                                     Refrigerant Tubing;    or the thread
                                                                     Follow Handling        direction is
                                                                     Instructions           reversed (i.e.,
                                                                     Carefully. Flammable   right-handed vs.
                                                                     Refrigerant Used.''    left-handed). These
                                                                     This marking must be   different fittings
                                                                     provided near all      should be
                                                                     exposed refrigerant    permanently affixed
                                                                     tubing..               to the unit at the
                                                                                point of service and
                                                                                maintained until the
                                                                                end-of-life of the
                                                                                unit, and should not
                                                                                be accessed with an
                                                                                adaptor.
----------------------------------------------------------------------------------------------------------------
\1\ The Director of the Federal Register approves the materials in these footnotes for incorporation by
  reference in accordance with 5 U.S.C. 552(a) and 1 CFR part 51 You may inspect a copy at U.S. EPA's Air and
  Radiation Docket; EPA West Building, Room 3334, 1301 Constitution Ave. NW., Washington DC or at the National
  Archives and Records Administration (NARA). For questions regarding access to these standards, the telephone
  number of EPA's Air and Radiation Docket is<PHONE_NUMBER>. For information on the availability of this material
  at NARA, call<PHONE_NUMBER>, or go to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
\2\ Underwriters Laboratories Inc. (UL) COMM 2000; 151 Eastern Avenue; Bensenville, IL 60106; 2000.com">orders@comm-2000.com;: 1-888-853-3503 in the U.S. or Canada (other countries dial +1-415-352-2168); http://ulstandards.ul.com/ or www.comm-2000.com.
\3\ UL 399. Standard for Drinking-Water Coolers. 7th edition. Supplement SB: Requirements for Room Air
  Conditioners Employing a Flammable Refrigerant in the Refrigerating System. Underwriters Laboratories, Inc.
  August 22, 2008.
\4\ UL 471. Standard for Commercial Refrigerators and Freezers. 10th edition. Supplement SB: Requirements for
  Refrigerators and Freezers Employing a Flammable Refrigerant in the Refrigerating System. Underwriters
  Laboratories, Inc. November 24, 2010.
\5\ UL 563. Standard for Ice Makers. 8th edition. Supplement SA: Requirements for Refrigerators and Freezers
  Employing a Flammable Refrigerant in the Refrigerating System. Underwriters Laboratories, Inc. July 31, 2009.

                       Refrigerants--Substitutes Acceptable Subject to Narrowed Use Limits
----------------------------------------------------------------------------------------------------------------
            End-use                Substitutes        Decision       Narrowed use limits    Further information
----------------------------------------------------------------------------------------------------------------
Centrifugal chillers (new       HFC-134a........  Acceptable        Acceptable after       Users are required to
 only).                                            subject to        January 1, 2024,       document and retain
                                                   narrowed use      only in military       the results of their
                                                   limits.           marine vessels where   technical
                                                                     reasonable efforts     investigation of
                                                                     have been made to      alternatives for the
                                                                     ascertain that other   purpose of
                                                                     alternatives are not   demonstrating
                                                                     technically feasible   compliance.
                                                                     due to performance     Information should
                                                                     or safety              include descriptions
                                                                     requirements.          of:
                                                                                Application
                                                                                in which the
                                                                                substitute is
                                                                                needed;

                                                                                Substitutes
                                                                                examined and
                                                                                rejected;
                                                                                Reason
                                                                                for rejection of
                                                                                other
                                                                                alternatives,
                                                                                e.g.,
                                                                                performance,
                                                                                technical or
                                                                                safety standards;
                                                                                and/or

                                                                                Anticipated date
                                                                                other substitutes
                                                                                will be available
                                                                                and qualified and
                                                                                projected time
                                                                                for switching.
Centrifugal chillers (new       HFC-134a and R-   Acceptable        Acceptable after       Users are required to
 only).                          404A.             subject to        January 1, 2024,       document and retain
                                                   narrowed use      only inhuman-rated     the results of their
                                                   limits.           spacecraft and         technical
                                                                     related support        investigation of
                                                                     equipment where        alternatives for the
                                                                     reasonable efforts     purpose of
                                                                     have been made to      demonstrating
                                                                     ascertain that other   compliance.
                                                                     alternatives are not   Information should
                                                                     technically feasible   include descriptions
                                                                     due to performance     of:
                                                                     or safety              Application
                                                                     requirements.          in which the
                                                                                substitute is
                                                                                needed;

                                                                                Substitutes
                                                                                examined and
                                                                                rejected;
                                                                                Reason
                                                                                for rejection of
                                                                                other
                                                                                alternatives,
                                                                                e.g.,
                                                                                performance,
                                                                                technical or
                                                                                safety standards;
                                                                                and/or

                                                                                Anticipated date
                                                                                other substitutes
                                                                                will be available
                                                                                and qualified and
                                                                                projected time
                                                                                for switching.
Positive displacement chillers  HFC-134a........  Acceptable        Acceptable after       Users are required to
 (new only).                                       subject to        January 1, 2024,       document and retain
                                                   narrowed use      only in military       the results of their
                                                   limits.           marine vessels where   technical
                                                                     reasonable efforts     investigation of
                                                                     have been made to      alternatives for the
                                                                     ascertain that other   purpose of
                                                                     alternatives are not   demonstrating
                                                                     technically feasible   compliance.
                                                                     due to performance     Information should
                                                                     or safety              include descriptions
                                                                     requirements.          of:
                                                                                Application
                                                                                in which the
                                                                                substitute is
                                                                                needed;

                                                                                Substitutes
                                                                                examined and
                                                                                rejected;
                                                                                Reason
                                                                                for rejection of
                                                                                other
                                                                                alternatives,
                                                                                e.g.,
                                                                                performance,
                                                                                technical or
                                                                                safety standards;
                                                                                and/or

                                                                                Anticipated date
                                                                                other substitutes
                                                                                will be available
                                                                                and qualified and
                                                                                projected time
                                                                                for switching.
Positive displacement chillers  HFC-134a and R-   Acceptable        Acceptable after       Users are required to
 (new only).                     404A.             subject to        January 1, 2024,       document and retain
                                                   narrowed use      only inhuman-rated     the results of their
                                                   limits.           spacecraft and         technical
                                                                     related support        investigation of
                                                                     equipment where        alternatives for the
                                                                     reasonable efforts     purpose of
                                                                     have been made to      demonstrating
                                                                     ascertain that other   compliance.
                                                                     alternatives are not   Information should
                                                                     technically feasible   include descriptions
                                                                     due to performance     of:
                                                                     or safety              Application
                                                                     requirements.          in which the
                                                                                substitute is
                                                                                needed;

                                                                                Substitutes
                                                                                examined and
                                                                                rejected;
                                                                                Reason
                                                                                for rejection of
                                                                                other
                                                                                alternatives,
                                                                                e.g.,
                                                                                performance,
                                                                                technical or
                                                                                safety standards;
                                                                                and/or

                                                                                Anticipated date
                                                                                other substitutes
                                                                                will be available
                                                                                and qualified and
                                                                                projected time
                                                                                for switching.
----------------------------------------------------------------------------------------------------------------

                                     Refrigerants--Unacceptable Substitutes
----------------------------------------------------------------------------------------------------------------
              End-use                       Substitutes                Decision           Further information
----------------------------------------------------------------------------------------------------------------
Centrifugal chillers (new only)...  FOR12A, FOR12B, HFC-134a,   Unacceptable as of     These refrigerants have
                                     HFC-227ea, HFC-236fa, HFC-  January 1, 2024        GWPs ranging from
                                     245fa, R-125/134a/600a      except where allowed   approximately 900 to
                                     (28.1/70/1.9), R-125/290/   under a narrowed use   9,810. Other
                                     134a/600a (55.0/1.0/42.5/   limit.                 alternatives will be
                                     1.5), R-404A, R-407C, R-                           available for this end-
                                     410A, R-410B, R-417A, R-                           use with lower overall
                                     421A, R-422B, R-422C, R-                           risk to human health and
                                     422D, R-423A, R-424A, R-                           the environment by the
                                     434A, R-438A, R-507A, RS-                          status change date.
                                     44 (2003 composition),
                                     and THR-03.
Centrifugal chillers (new only)...  Propylene (R-1270) and R-   Unacceptable as of     These refrigerants are
                                     443A.                       [date 30 days after    highly photochemically
                                                                 publication of final   reactive in the lower
                                                                 rule].                 atmosphere and may
                                                                                deteriorate local air
                                                                                quality (that is, may
                                                                                increase ground level
                                                                                ozone). Other
                                                                                alternatives are
                                                                                available for this end-
                                                                                use with lower overall
                                                                                risk to human health and
                                                                                the environment.
Cold storage warehouses (new only)  HFC-227ea, R-125/290/134a/  Unacceptable as of     These refrigerants have
                                     600a (55.0/1.0/42.5/1.5),   January 1, 2023.       GWPs ranging from
                                     R-404A, R-407A, R-407B, R-                         approximately 2,090 to
                                     410A, R-410B, R-417A, R-                           3,990. Other
                                     421A, R-421B, R-422A, R-                           alternatives will be
                                     422B, R-422C, R-422D, R-                           available for this end-
                                     423A, R-424A, R-428A, R-                           use with lower overall
                                     434A, R-438A, R-507A, and                          risk to human health and
                                     RS-44 (2003 composition).                          the environment by the
                                                                                status change date.
Cold storage warehouses (new only)  Propylene (R-1270) and R-   Unacceptable as of     These refrigerants are
                                     443A.                       [date 30 days after    highly photochemically
                                                                 publication of final   reactive in the lower
                                                                 rule].                 atmosphere and may
                                                                                deteriorate local air
                                                                                quality (that is, may
                                                                                increase ground level
                                                                                ozone). Other
                                                                                alternatives are
                                                                                available for this end-
                                                                                use with lower overall
                                                                                risk to human health and
                                                                                the environment.
Household refrigerators and         FOR12A, FOR12B, HFC-134a,   Unacceptable as of     These refrigerants have
 freezers (new only).                KDD6, R-125/290/134a/600a   January 1, 2021.       GWPs ranging from
                                     (55.0/1.0/42.5/1.5), R-                            approximately 900 to
                                     404A, R-407C, R-407F, R-                           3,985. Other
                                     410A, R-410B, R-417A, R-                           alternatives will be
                                     421A, R-421B, R-422A, R-                           available for this end-
                                     422B, R-422C, R-422D, R-                           use with lower overall
                                     424A, R-426A, R-428A, R-                           risk to human health and
                                     434A, R-437A, R-438A, R-                           the environment by the
                                     507A, RS-24 (2002                                  status change date.
                                     formulation), RS-44 (2003
                                     formulation), SP34E, and
                                     THR-03.

Positive displacement chillers      FOR12A, FOR12B, HFC-134a,   Unacceptable as of     These refrigerants have
 (new only).                         HFC-227ea, KDD6, R-125/     January 1, 2024        GWPs ranging from
                                     134a/600a (28.1/70/1.9),    except where allowed   approximately 900 to
                                     R-125/290/134a/600a (55.0/  under a narrowed use   3,985. Other
                                     1.0/42.5/1.5), R-404A, R-   limit.                 alternatives will be
                                     407C, R-410A, R-410B, R-                           available for this end-
                                     417A, R-421A, R-422B, R-                           use with lower overall
                                     422C, R-422D, R-424A, R-                           risk to human health and
                                     434A, R-437A, R-438A, R-                           the environment by the
                                     507A, RS-44 (2003                                  status change date.
                                     composition), SP34E, and
                                     THR-03.
Positive displacement chillers      Propylene (R-1270) and R-   Unacceptable as of     These refrigerants are
 (new only).                         443A.                       [date 30 days after    highly photochemically
                                                                 publication of final   reactive in the lower
                                                                 rule].                 atmosphere and may
                                                                                deteriorate local air
                                                                                quality (that is, may
                                                                                increase ground level
                                                                                ozone). Other
                                                                                alternatives are
                                                                                available for this end-
                                                                                use with lower overall
                                                                                risk to human health and
                                                                                the environment.
Residential and light commercial    Propylene (R-1270) and R-   Unacceptable as of     These refrigerants are
 air conditioning and heat pumps     443A.                       [date 30 days after    highly photochemically
 (new only).                                                     publication of a       reactive in the lower
                                                                 final rule].           atmosphere and may
                                                                                deteriorate local air
                                                                                quality (that is, may
                                                                                increase ground level
                                                                                ozone). Other
                                                                                alternatives are
                                                                                available for this end-
                                                                                use with lower overall
                                                                                risk to human health and
                                                                                the environment.
Residential and light commercial    All refrigerants            Unacceptable as of     These refrigerants are
 air conditioning--unitary split     identified as               [date 30 days after    highly flammable and
 AC systems and heat pumps           flammability Class 3 in     publication of final   present a flammability
 (retrofit only).                    ANSI/ASHRAE Standard 34-    rule].                 risk when used in
                                     2013.1 2 3                                         equipment designed for
                                    All refrigerants meeting                            nonflammable
                                     the criteria for                                   refrigerants. Other
                                     flammability Class 3 in                            alternatives are
                                     ANSI/ASHRAE Standard 34-                           available for this end-
                                     2013. This includes, but                           use with lower overall
                                     is not limited to,                                 risk to human health and
                                     refrigerant products sold                          the environment.
                                     under the names R-22a,
                                     22a, Blue Sky 22a
                                     refrigerant, Coolant
                                     Express 22a, DURACOOL-
                                     22a, EC-22, Ecofreeeze EF-
                                     22a, EF-22a, Envirosafe
                                     22a, ES-22a, Frost 22a,
                                     HC-22a, Maxi-Fridge, MX-
                                     22a, Oz-Chill 22a,
                                     Priority Cool, and RED
                                     TEK 22a..
Retail food refrigeration           HFC-227ea, KDD6, R-125/290/ Unacceptable as of     These refrigerants have
 (refrigerated food processing and   134a/600a (55.0/1.0/42.5/   January 1, 2021.       GWPs ranging from
 dispensing equipment) (new only).   1.5), R-404A, R-407A, R-                           approximately 1,770 to
                                     407B, R-407C, R-407F, R-                           3,990. Other
                                     410A, R-410B, R-417A, R-                           alternatives will be
                                     421A, R-421B, R-422A, R-                           available for this end-
                                     422B, R-422C, R-422D, R-                           use with lower overall
                                     424A, R-428A, R-434A, R-                           risk to human health and
                                     437A, R-438A, R-507A, RS-                          the environment by the
                                     44 (2003 formulation).                             status change date.
----------------------------------------------------------------------------------------------------------------
\1\ The Director of the Federal Register approves this incorporation by reference in accordance with 5 U.S.C.
  552(a) and 1 CFR part 51. You may inspect a copy at U.S. EPA's Air and Radiation Docket; EPA West Building,
  Room 3334, 1301 Constitution Ave. NW., Washington DC or at the National Archives and Records Administration
  (NARA). For questions regarding access to this standard, the telephone number of EPA's Air and Radiation
  Docket is<PHONE_NUMBER>. For information on the availability of this material at NARA, call<PHONE_NUMBER>, or go
  to: http://www.archives.gov/federal_register/code_of_federal_regulations/ibr_locations.html.
\2\ American Society of Heating, Refrigerating and Air-Conditioning Engineers (ASHRAE) 6300 Interfirst Drive,
  Ann Arbor, MI 48108; 1-800-527-4723 in the U.S. or Canada; http://www.techstreet.com/ashrae/ashrae_standards.html?ashrae_auth_token=.
\3\ ANSI/ASHRAE Standard 34-2013: Designation and Safety Classification of Refrigerants, November 2013.

                   Foam Blowing Agents--Substitutes Acceptable Subject to Narrowed Use Limits
----------------------------------------------------------------------------------------------------------------
            End-use                Substitutes        Decision       Narrowed use limits    Further information
----------------------------------------------------------------------------------------------------------------
Rigid PU: Spray foam--high-     HFC-134a, HFC-    Acceptable        Acceptable from        Users are required to
 pressure two-component.         245fa, and        subject to        January 1, 2020,       document and retain
                                 blends thereof;   narrowed use      until January 1,       the results of their
                                 blends of HFC-    limits.           2025, only in          technical
                                 365mfc with at                      military or space-     investigation of
                                 least four                          and aeronautics-       alternatives for the
                                 percent HFC-                        related applications   purpose of
                                 245fa, and                          where reasonable       demonstrating
                                 commercial                          efforts have been      compliance.
                                 blends of HFC-                      made to ascertain      Information should
                                 365mfc with                         that other             include descriptions
                                 seven to 13                         alternatives are not   of:
                                 percent HFC-                        technically feasible   Process or
                                 227ea and the                       due to performance     product in which the
                                 remainder HFC-                      or safety              substitute is
                                 365mfc; and                         requirements.          needed;
                                 Formacel TI.                       Closed cell foam        Substitutes
                                                                     products and           examined and
                                                                     products containing    rejected;
                                                                     closed cell foams      Reason for
                                                                     manufactured with      rejection of other
                                                                     these substitutes on   alternatives, e.g.,
                                                                     or before January 1,   performance,
                                                                     2025, may be used      technical or safety
                                                                     after that date..      standards; and/or
                                                                                Anticipated
                                                                                date other
                                                                                substitutes will be
                                                                                available and
                                                                                projected time for
                                                                                switching.

Rigid PU: Spray foam--low-      HFC-134a, HFC-    Acceptable        Acceptable from        Users are required to
 pressure two-component.         245fa, and        subject to        January 1, 2021,       document and retain
                                 blends thereof;   narrowed use      until January 1,       the results of their
                                 blends of HFC-    limits.           2025, only in          technical
                                 365mfc with at                      military or space-     investigation of
                                 least four                          and aeronautics-       alternatives for the
                                 percent HFC-                        related applications   purpose of
                                 245fa, and                          where reasonable       demonstrating
                                 commercial                          efforts have been      compliance.
                                 blends of HFC-                      made to ascertain      Information should
                                 365mfc with                         that other             include descriptions
                                 seven to 13                         alternatives are not   of:
                                 percent HFC-                        technically feasible   Process or
                                 227ea and the                       due to performance     product in which the
                                 remainder HFC-                      or safety              substitute is
                                 365mfc; and                         requirements.          needed;
                                 Formacel TI.                       Closed cell foam        Substitutes
                                                                     products and           examined and
                                                                     products containing    rejected;
                                                                     closed cell foams      Reason for
                                                                     manufactured with      rejection of other
                                                                     these substitutes on   alternatives, e.g.,
                                                                     or before January 1,   performance,
                                                                     2025, may be used      technical or safety
                                                                     after that date..      standards; and/or
                                                                                Anticipated
                                                                                date other
                                                                                substitutes will be
                                                                                available and
                                                                                projected time for
                                                                                switching.
----------------------------------------------------------------------------------------------------------------

                                  Foam Blowing Agents--Unacceptable Substitutes
----------------------------------------------------------------------------------------------------------------
             End-use                      Substitutes                 Decision             Further information
----------------------------------------------------------------------------------------------------------------
Flexible PU......................  Methylene chloride.......  Unacceptable as of [date  Methylene chloride is a
                                                               30 days after             carcinogen and may
                                                               publication of final      present a toxicity
                                                               rule].                    risk. Other
                                                                                alternatives are
                                                                                available for this end-
                                                                                use with lower overall
                                                                                risk to human health
                                                                                and the environment.
Integral Skin PU.................  Methylene chloride.......  Unacceptable as of        Methylene chloride is a
                                                               January 1, 2017.          carcinogen and may
                                                                                present a toxicity
                                                                                risk. Other
                                                                                alternatives are
                                                                                available for this end-
                                                                                use with lower overall
                                                                                risk to human health
                                                                                and the environment.
Polyolefin.......................  Methylene chloride.......  Unacceptable as of        Methylene chloride is a
                                                               January 1, 2020.          carcinogen and may
                                                              Closed cell foam           present a toxicity
                                                               products and products     risk. Other
                                                               containing closed cell    alternatives are
                                                               foams manufactured with   available for this end-
                                                               this substitute on or     use with lower overall
                                                               before January 1, 2020,   risk to human health
                                                               may be used after that    and the environment.
                                                               date..
Rigid PU: Spray foam--one          HFC-134a, HFC-245fa, and   Unacceptable as of        These foam blowing
 component foam sealants.           blends thereof; blends     January 1, 2020..         agents have GWPs
                                    of HFC-365mfc with at     Closed cell foam           ranging from higher
                                    least four percent HFC-    products and products     than 730 to
                                    245fa, and commercial      containing closed cell    approximately 1,500.
                                    blends of HFC-365mfc       foams manufactured with   Other alternatives will
                                    with seven to 13 percent   these substitutes on or   be available for this
                                    HFC-227ea and the          before January 1, 2020,   end-use with lower
                                    remainder HFC-365mfc;      may be used after that    overall risk to human
                                    and Formacel TI.           date..                    health and the
                                                                                environment by the
                                                                                status change date.
Rigid PU: Spray foam--high-        HFC-134a, HFC-245fa, and   Unacceptable as of        These foam blowing
 pressure two-component.            blends thereof; blends     January 1, 2020, except   agents have GWPs
                                    of HFC-365mfc with at      where allowed under a     ranging from higher
                                    least four percent HFC-    narrowed use limit.       than 730 to
                                    245fa, and commercial     Closed cell foam           approximately 1,500.
                                    blends of HFC-365mfc       products and products     Other alternatives will
                                    with seven to 13 percent   containing closed cell    be available for this
                                    HFC-227ea and the          foams manufactured with   end-use with lower
                                    remainder HFC-365mfc;      these substitutes on or   overall risk to human
                                    and Formacel TI.           before January 1, 2020,   health and the
                                                               may be used after that    environment by the
                                                               date..                    status change date.
Rigid PU: Spray foam--low-         HFC-134a, HFC-245fa, and   Unacceptable as of        These foam blowing
 pressure two-component.            blends thereof; blends     January 1, 2021, except   agents have GWPs
                                    of HFC-365mfc with at      where allowed under a     ranging from higher
                                    least four percent HFC-    narrowed use limit.       than 730 to
                                    245fa, and commercial     Closed cell foam           approximately 1,500.
                                    blends of HFC-365mfc       products and products     Other alternatives will
                                    with seven to 13 percent   containing closed cell    be available for this
                                    HFC-227ea and the          foams manufactured with   end-use with lower
                                    remainder HFC-365mfc;      these substitutes on or   overall risk to human
                                    and Formacel TI.           before January 1, 2020,   health and the
                                                               may be used after that    environment by the
                                                               date..                    status change date.
----------------------------------------------------------------------------------------------------------------

             Fire Suppression and Explosion Protection Agents--Acceptable Subject to Use Conditions
----------------------------------------------------------------------------------------------------------------
            End-use                  Substitute          Decision        Use conditions     Further information
----------------------------------------------------------------------------------------------------------------
Streaming......................  2-BTP............  Acceptable,        As of [date 30     This fire suppressant
                                                     subject to use     days after         has a relatively low
                                                     conditions.        publication of     GWP of 0.23-0.26 and
                                                                        final rule],       a short atmospheric
                                                                        acceptable only    lifetime of
                                                                        for use in         approximately seven
                                                                        handheld           days.
                                                                        extinguishers in  This agent is subject
                                                                        aircraft.          to requirements
                                                                                contained in a Toxic
                                                                                Substance Control Act
                                                                                (TSCA) section 5(e)
                                                                                Consent Order and any
                                                                                subsequent TSCA
                                                                                section 5(a)(2)
                                                                                Significant New Use
                                                                                Rule (SNUR).

                                                                                For establishments
                                                                                manufacturing,
                                                                                installing and
                                                                                maintaining handheld
                                                                                extinguishers using
                                                                                this agent:
                                                                                (1) Use of this agent
                                                                                should be used in
                                                                                accordance with the
                                                                                latest edition of
                                                                                NFPA Standard 10 for
                                                                                Portable Fire
                                                                                Extinguishers;
                                                                                (2) In the case that 2-
                                                                                BTP is inhaled,
                                                                                person(s) should be
                                                                                immediately removed
                                                                                and exposed to fresh
                                                                                air; if breathing is
                                                                                difficult, person(s)
                                                                                should seek medical
                                                                                attention;
                                                                                (3) Eye wash and quick
                                                                                drench facilities
                                                                                should be available.
                                                                                In case of ocular
                                                                                exposure, person(s)
                                                                                should immediately
                                                                                flush the eyes,
                                                                                including under the
                                                                                eyelids, with fresh
                                                                                water and move to a
                                                                                non-contaminated
                                                                                area.
                                                                                Exposed person(s)
                                                                                should remove all
                                                                                contaminated clothing
                                                                                and footwear to avoid
                                                                                irritation, and
                                                                                medical attention
                                                                                should be sought if
                                                                                irritation develops
                                                                                or persists;
                                                                                (4) Although unlikely,
                                                                                in case of ingestion
                                                                                of 2-BTP, the
                                                                                person(s) should
                                                                                consult a physician
                                                                                immediately;
                                                                                (5) Manufacturing
                                                                                space should be
                                                                                equipped with
                                                                                specialized
                                                                                engineering controls
                                                                                and well ventilated
                                                                                with a local exhaust
                                                                                system and low-lying
                                                                                source ventilation to
                                                                                effectively mitigate
                                                                                potential
                                                                                occupational
                                                                                exposure; regular
                                                                                testing and
                                                                                monitoring of the
                                                                                workplace atmosphere
                                                                                should be conducted;
                                                                                (6) Employees
                                                                                responsible for
                                                                                chemical processing
                                                                                should wear the
                                                                                appropriate PPE, such
                                                                                as protective gloves,
                                                                                tightly sealed
                                                                                goggles, protective
                                                                                work clothing, and
                                                                                suitable respiratory
                                                                                protection in case of
                                                                                accidental release or
                                                                                insufficient
                                                                                ventilation;
                                                                                (7) All spills should
                                                                                be cleaned up
                                                                                immediately in
                                                                                accordance with good
                                                                                industrial hygiene
                                                                                practices; and
                                                                                (8) Training for safe
                                                                                handling procedures
                                                                                should be provided to
                                                                                all employees that
                                                                                would be likely to
                                                                                handle containers of
                                                                                the agent or
                                                                                extinguishing units
                                                                                filled with the
                                                                                agent.
                                                                                (9) 2-BTP use as a
                                                                                streaming fire
                                                                                extinguishing agent
                                                                                in handheld
                                                                                extinguishers in
                                                                                aircraft should be in
                                                                                accordance with UL
                                                                                711, Rating and
                                                                                Testing of Fire
                                                                                Extinguishers and the
                                                                                Federal Aviation
                                                                                Administration (FAA)
                                                                                Minimum Performance
                                                                                Standard for Hand-
                                                                                Held Extinguishers
                                                                                (DOT/FAA/AR-01/37),
                                                                                with regard to the
                                                                                size and number of
                                                                                extinguishers
                                                                                depending on the size
                                                                                of aircraft.
                                                                                (10) 2-BTP handheld
                                                                                extinguishers should
                                                                                follow required
                                                                                minimum room volumes
                                                                                established by UL
                                                                                2129, Halocarbon
                                                                                Clean Agent Fire
                                                                                Extinguishers, when
                                                                                discharged into a
                                                                                confined space.
Total flooding.................  2-BTP............  Acceptable,        As of [date 30     This fire suppressant
                                                     subject to use     days after         has a relatively low
                                                     conditions.        publication of     GWP of 0.23-0.26 and
                                                                        final rule],       a short atmospheric
                                                                        acceptable only    lifetime of
                                                                        for use in         approximately seven
                                                                        engine nacelles    days. This agent is
                                                                        and auxiliary      subject to
                                                                        power units on     requirements
                                                                        aircraft.          contained in a TSCA
                                                                                section 5(e) Consent
                                                                                Order and any
                                                                                subsequent TSCA
                                                                                section 5(a)(2) SNUR.
                                                                                For establishments
                                                                                manufacturing,
                                                                                installing, and
                                                                                servicing engine
                                                                                nacelles and
                                                                                auxiliary power units
                                                                                on aircraft using
                                                                                this agent:
                                                                                (1) This agent should
                                                                                be used in accordance
                                                                                with the safety
                                                                                guidelines in the
                                                                                latest edition of the
                                                                                National Fire
                                                                                Protection
                                                                                Association (NFPA)
                                                                                2001 Standard for
                                                                                Clean Agent Fire
                                                                                Extinguishing
                                                                                Systems;
                                                                                (2) In the case that 2-
                                                                                BTP is inhaled,
                                                                                person(s) should be
                                                                                immediately removed
                                                                                and exposed to fresh
                                                                                air; if breathing is
                                                                                difficult, person(s)
                                                                                should seek medical
                                                                                attention;
                                                                                (3) Eye wash and quick
                                                                                drench facilities
                                                                                should be available.
                                                                                In case of ocular
                                                                                exposure, person(s)
                                                                                should immediately
                                                                                flush the eyes,
                                                                                including under the
                                                                                eyelids, with fresh
                                                                                water and move to a
                                                                                non-contaminated
                                                                                area.

                                                                                Exposed person(s)
                                                                                should remove all
                                                                                contaminated clothing
                                                                                and footwear to avoid
                                                                                irritation, and
                                                                                medical attention
                                                                                should be sought if
                                                                                irritation develops
                                                                                or persists;
                                                                                (4) Although unlikely,
                                                                                in case of ingestion
                                                                                of 2-BTP, the
                                                                                person(s) should
                                                                                consult a physician
                                                                                immediately;
                                                                                (5) Manufacturing
                                                                                space should be
                                                                                equipped with
                                                                                specialized
                                                                                engineering controls
                                                                                and well ventilated
                                                                                with a local exhaust
                                                                                system and low-lying
                                                                                source ventilation to
                                                                                effectively mitigate
                                                                                potential
                                                                                occupational
                                                                                exposure; regular
                                                                                testing and
                                                                                monitoring of the
                                                                                workplace atmosphere
                                                                                should be conducted;
                                                                                (6) Employees
                                                                                responsible for
                                                                                chemical processing
                                                                                should wear the
                                                                                appropriate PPE, such
                                                                                as protective gloves,
                                                                                tightly sealed
                                                                                goggles, protective
                                                                                work clothing, and
                                                                                suitable respiratory
                                                                                protection in case of
                                                                                accidental release or
                                                                                insufficient
                                                                                ventilation;
                                                                                (7) All spills should
                                                                                be cleaned up
                                                                                immediately in
                                                                                accordance with good
                                                                                industrial hygiene
                                                                                practices;
                                                                                (8) Training for safe
                                                                                handling procedures
                                                                                should be provided to
                                                                                all employees that
                                                                                would be likely to
                                                                                handle containers of
                                                                                the agent or
                                                                                extinguishing units
                                                                                filled with the
                                                                                agent;
                                                                                (9) Safety features
                                                                                that are typical of
                                                                                total flooding
                                                                                systems such as pre-
                                                                                discharge alarms,
                                                                                time delays, and
                                                                                system abort switches
                                                                                should be provided,
                                                                                as directed by
                                                                                applicable OSHA
                                                                                regulations and NFPA
                                                                                standards; use of
                                                                                this agent should
                                                                                also conform to
                                                                                relevant OSHA
                                                                                requirements,
                                                                                including 29 CFR
                                                                                1910, subpart L,
                                                                                sections 1910.160 and
                                                                                1910.162.
----------------------------------------------------------------------------------------------------------------

                   Fire Suppression and Explosion Protection Agents--Unacceptable Substitutes
----------------------------------------------------------------------------------------------------------------
              End-use                     Substitute                Decision              Further information
----------------------------------------------------------------------------------------------------------------
Total flooding....................  PFCs (C3F8 and C4F10)  Unacceptable as of [date    These fire suppressants
                                                            one year after              have GWPs ranging from
                                                            publication of final        8,830 to 8,860. Other
                                                            rule].                      alternatives will be
                                                           Total flooding systems       available for this end-
                                                            manufactured using these    use with lower overall
                                                            fire suppressants on or     risk to human health and
                                                            before [date one year       the environment by the
                                                            after publication of        status change date.
                                                            final rule] may be used
                                                            after that date..
----------------------------------------------------------------------------------------------------------------

[FR Doc. 2016-08163 Filed 4-15-16; 8:45 am]
 BILLING CODE 6560-50-P