

[Federal Register: September 28, 2006 (Volume 71, Number 188)]
[Rules and Regulations]               
[Page 56884-56893]
From the Federal Register Online via GPO Access [wais.access.gpo.gov]
[DOCID:fr28se06-14]                         

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ENVIRONMENTAL PROTECTION AGENCY

40 CFR Part 82

[EPA-HQ-OAR-2003-0118; FRL-8223-9]
RIN 2060-AG12

 
Protection of Stratospheric Ozone: Notice 21 for Significant New 
Alternatives Policy Program

AGENCY: Environmental Protection Agency (EPA).

ACTION: Notice of Acceptability.

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SUMMARY: This Notice of Acceptability expands the list of acceptable 
substitutes for ozone-depleting substances (ODS) under the U.S. 
Environmental Protection Agency's (EPA) Significant New Alternatives 
Policy (SNAP) program. The substitutes are for use in the following 
sectors: refrigeration and air conditioning, foam blowing, cleaning 
solvents, aerosols, and sterilants. The determinations concern new 
substitutes.

DATES: This notice of acceptability is effective on September 28, 2006.

ADDRESSES: EPA has established a docket for this action under Docket ID 
No. EPA-HQ-OAR-2003-0118 (continuation of Air Docket A-91-42). All 
electronic documents in the docket are listed in the index at http://www.regulations.gov.
 Although listed in the index, some information is 

not publicly available, i.e., Confidential Business Information (CBI) 
or other information whose disclosure is restricted by statute. 
Publicly available docket materials are available either electronically 
at http://www.regulations.gov or in hard copy at the EPA Air Docket (No. A-91-

42), EPA/DC, EPA West, Room B102, 1301 Constitution Ave., NW., 
Washington, DC. The Public Reading Room is open from 8:30 a.m. to 4:30 
p.m., Monday through Friday, excluding legal holidays. The telephone 
number for the Public Reading Room is (202) 566-1744, and the telephone 
number for the Air Docket is (202) 566-1742.

FOR FURTHER INFORMATION CONTACT: Margaret Sheppard by telephone at 
(202) 343-9163, by facsimile at (202) 343-2338, by e-mail at 
sheppard.margaret@epa.gov, or by mail at U.S. Environmental Protection 

Agency, Mail Code 6205J, 1200 Pennsylvania Avenue, NW., Washington, DC 
20460. Overnight or courier deliveries should be sent to the office 
location at 1310 L Street, NW., 8th floor, Washington, DC, 20005.
    For more information on the Agency's process for administering the 
SNAP program or criteria for evaluation of substitutes, refer to the 
original SNAP rulemaking published in the Federal Register on March 18, 
1994 (59 FR 13044). Notices and rulemakings under the SNAP program, as 
well as other EPA publications on protection of stratospheric ozone, 
are available at EPA's Ozone Depletion World Wide Web site at http://www.epa.gov/ozone/ including the SNAP portion at http://www.epa.gov/

ozone/snap/.

SUPPLEMENTARY INFORMATION:

I. Listing of New Acceptable Substitutes
    A. Refrigeration and Air Conditioning
    B. Foam Blowing
    C. Cleaning Solvents
    D. Aerosols
    E. Sterilants
II. Section 612 Program
    A. Statutory Requirements
    B. Regulatory History
Appendix A--Summary of Acceptable Decisions

I. Listing of New Acceptable Substitutes

    This section presents EPA's most recent acceptable listing 
decisions for substitutes in the following industrial sectors: 
Refrigeration and air conditioning, foam blowing, cleaning solvents, 
aerosols and sterilants. For copies of the full list of ODS substitutes 
in all industrial sectors, visit EPA's Ozone Depletion Web site at 
http://www.epa.gov/ozone/snap/lists/index.html.

    The Agency has determined that the Clean Air Act does not authorize 
EPA to regulate for global climate change purposes (Memo to Acting 
Administrator, Marianne L. Horinko from Robert E. Fabricant. 2003. 
Subject: EPA's Authority to Impose Mandatory Controls to Address Global 
Climate Change under the Clean Air Act). The Agency has not yet 
concluded how this determination would affect its consideration of the 
global warming potential of substitutes under the SNAP program. 
Regardless, for the substitutes considered here, the global warming 
potential of the alternatives was not a determinative factor in EPA's 
acceptable subject to use conditions determination.
    The sections below discuss each substitute listing in detail. 
Appendix A contains a table summarizing today's listing decisions for 
new substitutes. The statements in the ``Further Information'' column 
in the table provide additional information, but are not legally 
binding under section 612 of the Clean Air Act. In addition, the 
``further information'' may not be a comprehensive list of other legal 
obligations you may need to meet when using the substitute. Although 
you are not required to follow recommendations in the ``further 
information'' column of the table to use a substitute, EPA strongly 
encourages you to apply the information when using these substitutes. 
In many instances, the information simply refers to standard operating 
practices in existing industry and/or building-code standards. Thus, 
many of these statements, if adopted, would not require significant 
changes to existing operating practices.
    You can find submissions to EPA for the use of the substitutes 
listed in this document and other materials supporting the decisions in 
this action

[[Page 56885]]

in docket EPA-HQ-OAR-2003-0118 at http://www.regulations.gov.


A. Refrigeration and Air Conditioning

1. R-421A
    EPA's decision:
    R-421A [R-125/134a (58.0/42.0)] is acceptable for use in new and 
retrofit equipment as a substitute for hydrochlorofluorocarbon (HCFC)-
22 in:
     Chillers (centrifugal, screw, reciprocating);
     Industrial process refrigeration;
     Industrial process air conditioning;
     Retail food refrigeration;
     Cold storage warehouses;
     Refrigerated transport;
     Commercial ice machines;
     Ice skating rinks;
     Household refrigerators and freezers;
     Vending machines;
     Water coolers;
     Residential dehumidifiers; and
     Household and light commercial air conditioning and heat 
pumps.
    R-421A is a blend of 58% by weight hydrofluorocarbon (HFC)-125 
(pentafluoroethane, CAS ID 354-33-6), and 42% by weight HFC-
134a (1,1,1,2-teterafluoroethane, CAS ID 811-97-2). A common 
trade name for this refrigerant is Choice R421A. You may find the 
submission under Docket item EPA-HQ-OAR-2003-0118-0142 at 
http://www.regulations.gov.

    Environmental information: The ozone depletion potential (ODP) of 
R-421A is zero. The contribution of this blend to greenhouse gas 
emissions will be minimized through the implementation of the venting 
prohibition under section 608(c)(2) of the Clean Air Act (see 40 CFR, 
part 82, subpart F). This section and EPA's implementing regulations 
prohibit venting or release of substitutes for class I or class II ODSs 
used in refrigeration and air conditioning and require proper handling, 
such as recycling or recovery, and disposal of these substances.
    HFC-125 and HFC-134a are excluded from the definition of volatile 
organic compound (VOC) under Clean Air Act regulations (see 40 CFR 
51.100(s)) addressing the development of State implementation plans 
(SIPs) to attain and maintain the national ambient air quality 
standards.
    Flammability information: Neither component of this blend is 
flammable.
    Toxicity and exposure data: HFC-125 and HFC-134a have 8 hour/day, 
40 hour/week workplace environmental exposure limits (WEELs) of 1000 
ppm established by the American Industrial Hygiene Association (AIHA). 
EPA recommends that users follow all requirements and recommendations 
specified in the Material Safety Data Sheet (MSDS) for the blend and 
the individual components and other safety precautions common in the 
refrigeration and air conditioning industry. EPA also recommends that 
users of R-421A adhere to the AIHA's WEELs.
    Comparison to other refrigerants: R-421A is not an ozone depleter 
in contrast to HCFC-22 which it replaces. We find that R-421A is 
acceptable because it does not pose a greater overall risk to public 
health and the environment in the end uses listed above.
2. R-421B
    EPA's decision:
    R-421B [R-125/134a (85.0/15.0)] is acceptable for use in new and 
retrofit equipment as a substitute for HCFC-22, R-502, and 
chlorofluorocarbon (CFC)-12 in:
     Industrial process refrigeration;
     Retail food refrigeration;
     Cold storage warehouses;
     Refrigerated transport;
     Commercial ice machines;
     Ice skating rinks;
     Household refrigerators and freezers.
    R-421B is a blend of 85.0% by weight HFC-125 (pentafluoroethane, 
CAS ID 354-33-6) and 15.0% by weight HFC-134a (1,1,1,2-
tetrafluoroethane, CAS ID 811-97-2). A common trade name for 
this refrigerant is Choice R421B. You may find the submission under 
Docket item EPA-HQ-OAR-2003-0118-0143 at http://www.regulations.gov.

    Environmental information: The ODP of R-421B is zero. For 
environmental information on the components of this blend see the 
section on environmental information above for R-421A.
    Flammability information: Neither component of this blend is 
flammable.
    Toxicity and exposure data: See the section above on toxicity and 
exposure data above for R-421A.
    Comparison to other refrigerants: R-421B is not an ozone depleter; 
thus, it poses a lower risk for ozone depletion than the ODSs it 
replaces. Flammability and toxicity risks are low, as discussed above. 
We find that R-421B is acceptable because it does not pose a greater 
overall risk to public health and the environment in the end uses 
listed above.
3. R-422D
    EPA's decision:
    R-422D [R-125/134a/600a (65.1/31.5/3.4)] is acceptable for use in 
new and retrofit equipment as a substitute for HCFC-22 in:
     Chillers (centrifugal, screw, reciprocating);
     Industrial process refrigeration;
     Industrial process air conditioning;
     Retail food refrigeration;
     Cold storage warehouses;
     Refrigerated transport;
     Commercial ice machines;
     Ice skating rinks;
     Household refrigerators and freezers;
     Vending machines;
     Water coolers;
     Residential dehumidifiers;
     Non-mechanical heat transfer;
     Household and light commercial air conditioning and heat 
pumps; and
     Motor vehicle air conditioning (buses and passenger trains 
only).
    R-422D is a blend of 65.1% by weight HFC-125 (pentafluoroethane, 
CAS ID 354-33-6), 31.5% by weight HFC-134a (1,1,1,2-
tetrafluoroethane, CAS ID 811-97-2), and 3.4% by weight R-600a 
(isobutane, 2-methyl propane, CAS ID 75-28-5). A common trade 
name for this refrigerant is ISCEON MO29. You may find the submission 
under Docket item EPA-HQ-OAR-2003-0118-0121 at http://www.regulations.gov.

    Environmental information: The ODP of R-422D is zero. For 
environmental information on HFC-125 and HFC-134a, see the section on 
environmental information above for R-421A.
    The contribution of this blend to greenhouse gas emissions will be 
minimized through the implementation of the venting prohibition under 
section 608(c)(2) of the Clean Air Act (see 40 CFR, part 82, subpart 
F). This section and EPA's implementing regulations prohibit venting or 
release of substitutes for class I or class II ODSs used in 
refrigeration and air conditioning and require proper handling, such as 
recycling or recovery, and disposal of these substances.
    Isobutane is a VOC under Clean Air Act regulations concerning the 
development of SIPs to attain and maintain the national ambient air 
quality standards. 40 CFR 51.100(s).
    Flammability information: While one component of the blend, 
isobutane, is flammable, the blend as formulated and under worst-case 
fractionated formulation scenarios, is not flammable.
    Toxicity and exposure data: For information on the workplace 
exposure limits for HFC-125 and HFC-134a, see the section on toxicity 
and exposure data above for R-421A. Isobutane has an 8 hour/day, 40 
hour/week threshold limit value (TLV) established by the American 
Conference of Governmental Industrial Hygienists (ACGIH) of 1000 ppm. 
EPA recommends that users follow all requirements and recommendations 
specified in the MSDS for the blend and the individual

[[Page 56886]]

components and other safety precautions common in the refrigeration and 
air conditioning industry. EPA also recommends that users of R-422D 
adhere to the AIHA's WEELs and the ACGIH's TLV.
    Comparison to other refrigerants: R-422D is not an ozone depleter 
in contrast to HCFC-22 which it replaces. Flammability and toxicity 
risks are low, as discussed above. Thus, we find that R-422D is 
acceptable because it does not pose a greater overall risk to public 
health and the environment in the end uses listed above.
4. Formulation of RS-24 Changed
    Refrigerant Solutions Ltd. (formerly Refrigerant Products Ltd.) has 
notified EPA that it is changing the composition of RS-24. On December 
20, 2002 (67 FR 77927), EPA found the original formulation of RS-24 
acceptable for a variety of end-uses. The composition of the old 
formulation was claimed as confidential business information (CBI). We 
will identify the old composition as ``RS-24 (2002 composition)'' and 
will continue to find it acceptable. EPA's decision on the new 
formulation is discussed below in the decision for R-426A.
5. R-426A
    EPA's decision:
    R-426A [R-125/134a/600/601a (5.1/93.0/1.3/0.6)] is acceptable for 
use in new and retrofit equipment as a substitute for CFC-12 in:
     Industrial process refrigeration;
     Industrial process air conditioning;
     Retail food refrigeration;
     Cold storage warehouses;
     Refrigerated transport;
     Commercial ice machines;
     Ice skating rinks;
     Vending machines;
     Water coolers;
     Household refrigerators and freezers; and
     Residential dehumidifiers.
    R-426A [R-125/134a/600/601a (5.1/93.0/1.3/0.6)] is acceptable, 
subject to use conditions, for use in new and retrofit equipment as a 
substitute for CFC-12 in the following end use:
     Motor vehicle air conditioning.
    Conditions for use in motor vehicle air conditioning systems. 
Regulations regarding recycling and prohibiting venting issued under 
section 609 of the Clean Air Act apply to this blend (subpart B of 40 
CFR part 82).
    On October 16, 1996, (61 FR 54029), EPA promulgated a final rule 
that established certain conditions on the use of any refrigerant used 
as a substitute for CFC-12 in motor vehicle air conditioning systems 
(Appendix D of subpart G of 40 CFR part 82). That rule provided that 
EPA would list new motor vehicle air conditioning system refrigerants 
in future notices of acceptability and that these conditions would 
apply to any such refrigerant found acceptable. Therefore, the use of 
R-426A as a CFC-12 substitute in motor vehicle air conditioning systems 
must follow the standard conditions:
     The use of unique fittings designed by the refrigerant 
manufacturer;
     The application of a detailed label;
     The removal of the original refrigerant prior to charging 
with R-426A; and
     The installation of a high-pressure compressor cutoff 
switch on systems equipped with pressure relief devices.
    The October 16, 1996 rule gives full details on these use 
conditions.
    You must use the following fittings to use R-426A in motor vehicle 
air conditioning systems:

----------------------------------------------------------------------------------------------------------------
                                                   Diameter                                             Thread
                  Fitting type                     (inches)        Thread pitch (threads/inch)        direction
----------------------------------------------------------------------------------------------------------------
Low-side service port..........................               Quick-connect
High-side service port.........................               Quick-connect
Large containers (>20 lb.).....................               Quick-connect
Small cans.....................................               Quick-connect
----------------------------------------------------------------------------------------------------------------

    The quick-connect fittings have been reviewed and found to be 
sufficiently different from HFC-134a and FRIGC FR-12 quick-connect 
fittings to be considered unique. The labels will have a gold 
background and black text. These are the same quick-connect fittings 
and same label as previously approved for RS-24 (2002 composition); 
however, the manufacturer of R-426A has stated that RS-24 (2002 
composition) has not been and will not be sold for use in motor vehicle 
air conditioners.
    R-426A is a blend of 5.1% by weight HFC-125 (pentafluoroethane, CAS 
ID 354-33-6), 93.0% by weight HFC-134a (1,1,1,2-
tetrafluoroethane, CAS ID 811-97-2), 1.3% by weight R-600 (n-
butane, CAS ID 106-97-8), and 0.6% by weight R-601a 
(isopentane, 2-methylbutane, CAS ID 78-78-4). A common trade 
name for this refrigerant is RS-24. This is a new formulation for RS-
24, different from the one that EPA previously found acceptable in 
several refrigerant end uses (December 20, 2002; 67 FR 77927). You may 
find additional information under Docket item EPA-HQ-OAR-2003-0118-0148 
at http://www.regulations.gov.

    Environmental information: The ODP of R-426A is zero. For 
environmental information on HFC-125 and HFC-134a see the section on 
environmental information above for R-421A.
    The contribution of this blend to greenhouse gas emissions will be 
minimized through the implementation of the venting prohibition under 
section 608(c)(2) of the Clean Air Act (see 40 CFR, part 82, subpart 
F). This section and EPA's implementing regulations prohibit venting or 
release of substitutes for class I or class II ODSs used in 
refrigeration and air conditioning and require proper handling, such as 
recycling or recovery, and disposal of these substances.
    Isopentane and n-butane are VOCs under Clean Air Act regulations 
concerning the development of SIPs to attain and maintain the national 
ambient air quality standards. 40 CFR 51.100(s).
    Flammability information: While two of the blend components, n-
butane and isopentane, are flammable, the blend as formulated, and 
under worst-case fractionated formulation scenarios, is not flammable.
    Toxicity and exposure data: HFC-125 and HFC-134a have 8 hour/day, 
40 hour/week WEELs of 1000 ppm established by the AIHA. The other 
components, n-butane and isopentane, have 8 hour/day, 40 hour/week 
threshold limit values (TLVs) established by the American Conference of 
Governmental Industrial Hygienists (ACGIH) of 800 ppm and 600 ppm, 
respectively. EPA recommends that users follow all requirements and 
recommendations specified in the MSDS for the blend and the individual 
components and other safety precautions common in the refrigeration and 
air conditioning industry. EPA also recommends that users of R-426A 
adhere to the AIHA's WEELs and the ACGIH's TLV.

[[Page 56887]]

    Comparison to other refrigerants: R-426A is not an ozone depleter 
in contrast to CFC-12 which it replaces. Flammability and toxicity 
risks are low, as discussed above. Thus, we find that R-426A is 
acceptable because it does not pose a greater overall risk to public 
health and the environment in the end uses and applications listed 
above.
6. Formulation of RS-44 Changed
    Refrigerant Solutions Ltd. (formerly Refrigerant Products Ltd.) has 
notified EPA that it is changing the composition of RS-44. On August 
21, 2003 (68 FR 50533), EPA found the original formulation of RS-44 
acceptable for a variety of end-uses. The composition of the old 
formulation was claimed as confidential business information (CBI). We 
will continue to identify the blend as ``RS-44 (2003 composition)'' and 
will continue to find it acceptable. EPA's decision on the new 
formulation is discussed below in the decision for R-424A.
7. R-424A
    EPA's decision:
    R-424A [R-125/134a/600a/600/601a] (50.5/47.0/0.9/1.0/0.6)] is 
acceptable for use in new and retrofit equipment as a substitute for 
HCFC-22 in:
     Chillers (centrifugal, screw, reciprocating);
     Industrial process refrigeration;
     Industrial process air conditioning;
     Retail food refrigeration;
     Cold storage warehouses;
     Refrigerated transport;
     Commercial ice machines;
     Ice skating rinks;
     Household refrigerators and freezers;
     Residential dehumidifiers; and
     Household and light commercial air conditioning and heat 
pumps.
    R-424A is a blend of 50.5% by weight HFC-125 (pentafluoroethane, 
CAS ID  354-33-6), 47.0% by weight HFC-134a (1,1,1,2-
tetrafluoroethane, CAS ID 811-97-2), 0.9% by weight R-600a 
(isobutane, 2-methyl propane, CAS ID 75-28-5), 1.0% by weight 
R-600 (n-butane, CAS ID 106-97-8), and 0.6% by weight R-601a 
(isopentane, 2-methylbutane, CAS ID 78-78-4). A common trade 
name for this refrigerant is RS-44. This is a new formulation for RS-
44, different from the one that EPA previously found acceptable in 
several refrigerant end uses (August 21, 2003; 68 FR 50533). You may 
find additional information under Docket item EPA-HQ-OAR-2003-0118-0131 
at http://www.regulations.gov.

    Environmental information: The ODP of R-424A is zero. For 
environmental information on HFC-125 and HFC-134a, see the section on 
environmental information above for R-421A. For environmental 
information on R-600 and R-601a, see the section on environmental 
information above for R-426A. For environmental information on R-600a, 
see the section on environmental information above for R-422D.
    The contribution of this blend to greenhouse gas emissions will be 
minimized through the implementation of the venting prohibition under 
section 608(c)(2) of the Clean Air Act (see 40 CFR, part 82, subpart 
F). This section and EPA's implementing regulations prohibit venting or 
release of substitutes for class I or class II ODSs used in 
refrigeration and air conditioning and require proper handling, such as 
recycling or recovery, and disposal of these substances.
    Isobutane, n-butane, and isopentane are VOCs under Clean Air Act 
regulations concerning the development of SIPs to attain and maintain 
the national ambient air quality standards. 40 CFR 51.100(s).
    Flammability information: While three components of the blend are 
flammable, the blend as formulated, and under worst-case fractionated 
formulation scenarios, is not flammable.
    Toxicity and exposure data: For information on the workplace 
exposure limits for the components of this blend see the toxicity and 
exposure data sections above for R-421A, R-422D, and R-426A. EPA 
recommends that users follow all requirements and recommendations 
specified in the MSDS for the blend and the individual components and 
other safety precautions common in the refrigeration and air 
conditioning industry. EPA also recommends that users of R-424A adhere 
to the AIHA's WEELs and the ACGIH's TLV.
    Comparison to other refrigerants: R-424A is not an ozone depleter 
in contrast to HCFC-22 which it replaces. Flammability and toxicity 
risks are low, as discussed above. Thus, we find that R-424A is 
acceptable because it does not pose a greater overall risk to public 
health and the environment in the end uses listed above.
8. R-407D
    EPA's decision:
    R-407D [R-32/125/134a (15.0/15.0/70.0)] is acceptable for use in 
new and retrofit equipment as a substitute for CFC-12 in:
     Refrigerated transport.
    R-407D is a blend of 15.0% by weight HFC-32 (difluoromethane, CAS 
ID 75-10-5), 15.0% by weight HFC-125 (pentafluoroethane, CAS 
ID  354-33-6), and 70.0% by weight HFC-134a (1,1,1,2-
tetrafluoroethane, CAS ID 811-97-2).
    Environmental information: The ODP of R-407D is zero. For 
environmental information on HFC-125 and HFC-134a, see the section on 
environmental information above for R-421A.
    The contribution of this blend to greenhouse gas emissions will be 
minimized through the implementation of the venting prohibition under 
section 608(c)(2) of the Clean Air Act (see 40 CFR, part 82, subpart 
F). This section and EPA's implementing regulations prohibit venting or 
release of substitutes for class I or class II ODSs used in 
refrigeration and air conditioning and require proper handling, such as 
recycling or recovery, and disposal of these substances. HFC-32 is 
excluded from the definition of volatile organic compound (VOC) under 
Clean Air Act regulations (see 40 CFR 51.100(s)) addressing the 
development of State implementation plans (SIPs) to attain and maintain 
the national ambient air quality standards.
    Flammability information: While one component of the blend, HFC-32, 
is flammable, the blend as formulated and under worst case fractionated 
formulation scenarios is not flammable.
    Toxicity and exposure data: For information on the workplace 
exposure limits for HFC-125 and HFC-134a, see the section on toxicity 
and exposure data above for R-421A. HFC-32 has an 8 hour/day, 40 hour/
week workplace environmental exposure limits (WEELs) of 1000 ppm 
established by the American Industrial Hygiene Association (AIHA). EPA 
recommends that users follow all requirements and recommendations 
specified in the Material Safety Data Sheet (MSDS) for the blend and 
the individual components and other safety precautions common in the 
refrigeration and air conditioning industry. EPA also recommends that 
users of R-407D adhere to the AIHA's WEELs.
    Comparison to other refrigerants: R-407D is not an ozone depleter 
in contrast to CFC-12 which it replaces. Flammability and toxicity 
risks are low, as discussed above. Thus, we find that R-407D is 
acceptable because it does not pose a greater overall risk to public 
health and the environment in the end uses listed above.

B. Foam Blowing

1. EcomateTM
    EPA's decision:
    EcomateTM is acceptable as a substitute for CFCs and 
HCFCs in the following end uses:

[[Page 56888]]

     Polystyrene, Extruded Boardstock & Billet;
     Phenolic Insulation Board & Bunstock;
     Flexible Polyurethane;
     Polyurethane, Extruded Sheet; and
     Polyolefin.
    EPA previously found Ecomate acceptable for a number of foam 
blowing end uses in Notice 18, August 21, 2003 (68 FR 50533) and Notice 
19, October 1, 2004 (69 FR 58903).
    The submitter, Foam Supplies Inc., claims that the composition of 
EcomateTM is confidential business information (see docket 
A-91-42, item VI-D-296).
    Environmental information: EcomateTM has no ODP. Users 
should be aware that EcomateTM is not excluded from the 
definition of volatile organic compound (VOC) under Clean Air Act 
regulations addressing the development of State implementation plans 
(SIPs) to attain and maintain the national ambient air quality 
standards. 40 CFR 51.100(s). For more information, refer to the 
manufacturer of EcomateTM, EPA regulations, and your state 
or local air quality agency. Also, because EcomateTM is 
considered hazardous, spills and disposal should be handled in 
accordance with requirements of the Resource Conservation and Recovery 
Act (RCRA).
    Flammability information: EcomateTM is flammable and 
should be handled with proper precautions. Use of EcomateTM 
will require safe handling and shipping as prescribed by the 
Occupational Safety and Health Administration (OSHA) and the Department 
of Transportation (for example, using personal safety equipment and 
following requirements for shipping hazardous materials at 49 CFR parts 
170 through 173). However, when blended with fire retardant, the 
flammability of EcomateTM can be reduced to make a 
formulation that is either combustible or non-flammable (refer to the 
manufacturer of EcomateTM for more information).
    Toxicity and exposure data: EcomateTM should be handled 
with proper precautions. EPA anticipates that EcomateTM will 
be used consistent with the recommendations specified in the 
manufacturers' Material Safety Data Sheets (MSDSs) (e.g., use goggles 
and neoprene gloves when handling; handle in a fume hood or with 
adequate ventilation; if the workplace exposure limit is exceeded, use 
a NIOSH/MSHA approved air supplied respirator in the absence of proper 
environmental control). OSHA established a permissible exposure limit 
for the main component of EcomateTM of 100 ppm for a time-
weighted average over an eight-hour work shift. The ACGIH recommends a 
TLV of 100 ppm on an eight-hour time-weighted average and a short-term 
exposure limit of 150 ppm for a 15-minute time-weighted average for the 
main component of EcomateTM.
    Comparison to other foam blowing agents: EcomateTM is 
not an ozone depleter in contrast to the CFCs and HCFCs it replaces. 
Although EcomateTM is flammable, we find that the 
manufacturer's recommended precautions for safety are sufficient so 
that the risks will not be significantly higher than for other 
available or potentially available substitutes in this end use. Meeting 
Federal exposure requirements allows EcomateTM to be used 
with no greater risk of toxicity than for other available or 
potentially available substitutes in this end use. Thus, we find that 
EcomateTM is acceptable because there are no other 
substitutes that are currently or potentially available that provide a 
substantially lower risk to public health and the environment in the 
end uses listed above. You may find additional information under Docket 
item EPA-HQ-OAR-2003-0118-0063 at http://www.regulations.gov.


C. Cleaning Solvents

1. Mini-Max Cleaner[supreg]
    EPA's decision:
    The Mini-Max Cleaner[supreg] is acceptable as a substitute for CFC-
113, methyl chloroform, and HCFCs in the following end-uses:
     Metal cleaning;
     Electronics cleaning; and
     Precision cleaning.
    Mini-Max Cleaner[supreg] is a cleaning device that creates super-
heated, high pressure steam vapor. A relatively small amount of water 
is used, thus minimizing the amount of waste water that is produced. 
You may find the submission under Docket item EPA-HQ-OAR-2003-0118-0120 
and -0124 at http://www.regulations.gov.

    Environmental information: Mini-Max Cleaner[reg] does not create 
emissions and its ODP is zero. The relatively small amount of water 
used minimizes indirect impacts on the atmosphere and on water.
    Flammability information: The device is not flammable. There is a 
potential explosion hazard when the Mini-Max[reg] Cleaner is used in 
the presence of VOCs or where liquids with a flash point are added to 
the water. EPA recommends that users follow all requirements and 
recommendations specified in the user safety manual to minimize any 
risks.
    Toxicity and exposure data: The Mini-Max Cleaner[reg] introduces no 
chemicals of concern. The resulting waste should be handled with safety 
precautions common in the solvent cleaning industry because the removed 
soils and chemicals may be toxic.
    Comparison to other cleaning solvents: The Mini-Max Cleaner[supreg] 
is not an ozone depleter. Flammability and toxicity risks are 
negligible, as discussed above. Thus, we find that the Mini-Max 
Cleaner[supreg] is acceptable because it does not pose a greater risk 
to public health and the environment in the end uses listed. For more 
information refer to the manufacturer of the Mini-Max Cleaner[supreg].

D. Aerosols

1. Mini-Max Cleaner[supreg]
    EPA's decision:
    The Mini-Max Cleaner[supreg] is acceptable as a substitute for CFC-
113, methyl chloroform, and HCFCs in aerosol solvents.
    Environmental information: For further information about the Mini-
Max Cleaner[supreg], see above in section B.1 on solvent cleaning.
    Flammability information: For further information about the Mini-
Max Cleaner[supreg], see above in section B.1 on solvent cleaning.
    Toxicity and exposure data: For further information about the Mini-
Max Cleaner[supreg], see above in section B.1 on solvent cleaning.
    Comparison to other aerosol solvents: The Mini-Max Cleaner[supreg] 
is not an ozone depleter. Flammability and toxicity risks are 
negligible, as discussed above. Thus, we find that the Mini-Max 
Cleaner[supreg] is acceptable because it does not pose a greater risk 
to public health and the environment in the end use listed.

E. Sterilants

1. Mini-Max Cleaner[supreg]
    EPA's decision:
    The Mini-Max Cleaner[supreg] is acceptable as a substitute for CFC-
12, HCFC-22, HCFC-124 and blends thereof in the sterilization sector.
    EPA previously found steam acceptable as a sterilant under 59 
FR13044, March 18, 1994. You may find the submission under Docket items 
EPA-HQ-OAR-2003-0118-0120 and -0124 at http://www.regulations.gov.

    Environmental information: For further information about the Mini-
Max Cleaner[supreg], see above in section B.1 on solvent cleaning.
    Flammability information: For further information about the Mini-
Max Cleaner[supreg], see above in section B.1 on solvent cleaning.
    Toxicity and exposure: EPA expects users to follow all 
recommendations

[[Page 56889]]

specified in the user's manual and other safety precautions common in 
the medical sterilization industry.
    Comparison to other sterilants: The Mini-Max Cleaner[supreg] is not 
an ozone depleter. Flammability risks are negligible, as discussed 
above. The toxicity is less than that of ethylene oxide and its blends. 
Thus, we find the Mini-Max Cleaner[supreg] acceptable because it does 
not pose a greater risk to public health and the environment.

II. Section 612 Program

A. Statutory Requirements

    Section 612 of the Clean Air Act authorizes EPA to develop a 
program for evaluating alternatives to ozone-depleting substances. We 
refer to this program as the Significant New Alternatives Policy (SNAP) 
program. The major provisions of section 612 are:
     Rulemaking--Section 612(c) requires EPA to promulgate 
rules making it unlawful to replace any class I (chlorofluorocarbon, 
halon, carbon tetrachloride, methyl chloroform, and 
hydrobromofluorocarbon) or class II (hydrochlorofluorocarbon) substance 
with any substitute that the Administrator determines may present 
adverse effects to human health or the environment where the 
Administrator has identified an alternative that (1) reduces the 
overall risk to human health and the environment, and (2) is currently 
or potentially available.
     Listing of Unacceptable/Acceptable Substitutes--Section 
612(c) also requires EPA to publish a list of the substitutes 
unacceptable for specific uses. We must publish a corresponding list of 
acceptable alternatives for specific uses.
     Petition Process--Section 612(d) grants the right to any 
person to petition EPA to add a substance to or delete a substance from 
the lists published in accordance with section 612(c). The Agency has 
90 days to grant or deny a petition. Where the Agency grants the 
petition, it must publish the revised lists within an additional six 
months.
     90-day Notification--Section 612(e) directs EPA to require 
any person who produces a chemical substitute for a class I substance 
to notify the Agency not less than 90 days before new or existing 
chemicals are introduced into interstate commerce for significant new 
uses as substitutes for a class I substance. The producer must also 
provide the Agency with the producer's unpublished health and safety 
studies on such substitutes.
     Outreach--Section 612(b)(1) states that the Administrator 
shall seek to maximize the use of Federal research facilities and 
resources to assist users of class I and II substances in identifying 
and developing alternatives to the use of such substances in key 
commercial applications.
     Clearinghouse--Section 612(b)(4) requires the Agency to 
set up a public clearinghouse of alternative chemicals, product 
substitutes, and alternative manufacturing processes that are available 
for products and manufacturing processes which use class I and II 
substances.

B. Regulatory History

    On March 18, 1994, EPA published the final rulemaking (59 FR 13044) 
that described the process for administering the SNAP program and 
issued our first acceptability lists for substitutes in the major 
industrial use sectors. These sectors include:
     Refrigeration and air conditioning;
     Foam blowing;
     Solvents cleaning;
     Fire suppression and explosion protection;
     Sterilants;
     Aerosols;
     Adhesives, coatings and inks; and
     Tobacco expansion.

These sectors comprise the principal industrial sectors that 
historically consumed the largest volumes of ozone-depleting compounds.
    As described in this original rule for the SNAP program, EPA does 
not believe that rulemaking procedures are required to list 
alternatives as acceptable with no limitations. Such listings do not 
impose any sanction, nor do they remove any prior license to use a 
substance. Therefore, by this notice we are adding substances to the 
list of acceptable alternatives without first requesting comment on new 
listings.
    However, we do believe that notice-and-comment rulemaking is 
required to place any substance on the list of prohibited substitutes, 
to list a substance as acceptable only under certain conditions, to 
list substances as acceptable only for certain uses, or to remove a 
substance from the lists of prohibited or acceptable substitutes. We 
publish updates to these lists as separate notices of rulemaking in the 
Federal Register.
    The Agency defines a ``substitute'' as any chemical, product 
substitute, or alternative manufacturing process, whether existing or 
new, intended for use as a replacement for a class I or class II 
substance. Anyone who plans to market or produces a substitute for an 
ODS in one of the eight major industrial use sectors must provide EPA 
with health and safety studies on the substitute at least 90 days 
before introducing it into interstate commerce for significant new use 
as an alternative. This requirement applies to substitute 
manufacturers, but may include importers, formulators, or end-users, 
when they are responsible for introducing a substitute into commerce.
    You can find a complete chronology of SNAP decisions and the 
appropriate Federal Register citations from the SNAP section of EPA's 
Ozone Depletion World Wide Web site at http://www.epa.gov/ozone/snap/chron.html.
 This information is also available from the Air Docket (see 

Addresses section above for contact information).

List of Subjects in 40 CFR Part 82

    Environmental protection, Administrative practice and procedure, 
Air pollution control, Reporting and recordkeeping requirements.

    Dated: September 19, 2006.
Brian J. McLean,
Director, Office of Atmospheric Programs.

                                   Appendix A: Summary of Acceptable Decisions
----------------------------------------------------------------------------------------------------------------
              End-use                      Substitute               Decision             Further information
----------------------------------------------------------------------------------------------------------------
                                       Refrigeration and Air Conditioning
----------------------------------------------------------------------------------------------------------------
Centrifugal chillers (retrofit and   R-421A (Choice R421A)   Acceptable.
 new).                                as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.

[[Page 56890]]


Screw chillers (retrofit and new)..  R-421A (Choice R421A)   Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Reciprocating chillers (retrofit     R-421A (Choice R421A)   Acceptable.
 and new).                            as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Industrial process refrigeration     R-421A (Choice R421A)   Acceptable.
 (retrofit and new).                  as a substitute for
                                      HCFC-22.
                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Industrial process air conditioning  R-421A (Choice R421A)   Acceptable.
 (retrofit and new).                  as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Retail food refrigeration (retrofit  R-421A (Choice R421A)   Acceptable.
 and new).                            as a substitute for
                                      HCFC-22.
                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Cold storage warehouses (retrofit    R-421A (Choice R421A)   Acceptable.
 and new).                            as a substitute for
                                      HCFC-22.
                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Refrigerated transport (retrofit     R-421A (Choice R421A)   Acceptable.
 and new).                            as a substitute for
                                      HCFC-22.

[[Page 56891]]


                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
                                     R-407D as a substitute  Acceptable.
                                      for CFC-12.
Commercial ice machines (retrofit    R-421A (Choice R421A)   Acceptable.
 and new).                            as a substitute for
                                      HCFC-22.
                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Ice skating rinks (retrofit and      R-421A (Choice R421A)   Acceptable.
 new).                                as a substitute for
                                      HCFC-22.
                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Household refrigerators and          R-421A (Choice R421A)   Acceptable.
 freezers (retrofit and new).         as a substitute for
                                      HCFC-22.
                                     R-421B (Choice R421B)   Acceptable.
                                      as a substitute for
                                      HCFC-22, R-502, and
                                      CFC-12.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Vending machines (retrofit and new)  R-421A (Choice R421A)   Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
Water coolers (retrofit and new)...  R-421A (Choice R421A)   Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.

[[Page 56892]]


Residential dehumidifiers (retrofit  R-421A (Choice R421A)   Acceptable.
 and new).                            as a substitute for
                                      HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-426A (RS-24) as a     Acceptable.
                                      substitute for CFC-12.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Non-mechanical heat transfer         ISCEON MO29 (R-422D)    Acceptable.
 (retrofit and new).                  as a substitute for
                                      HCFC-22.
Household and light commercial air   R-421A (Choice R421A)   Acceptable.
 conditioning and heat pumps          as a substitute for
 (retrofit and new).                  HCFC-22.
                                     ISCEON MO29 (R-422D)    Acceptable.
                                      as a substitute for
                                      HCFC-22.
                                     R-424A (RS-44) as a     Acceptable.
                                      substitute for HCFC-
                                      22.
Motor vehicle air conditioning       ISCEON MO29 (R-422D)    Acceptable.
 (buses and passenger trains only).   as a substitute for
                                      HCFC-22.
Motor vehicle air conditioning.....  R-426A (RS-24) as a     Acceptable subject to   Users must use the unique
                                      substitute for CFC-12.  use conditions.         fittings and label
                                                                                      specified by the
                                                                                      manufacturer. Use is
                                                                                      subject to requirements
                                                                                      under Sec.   609 of the
                                                                                      Clean Air Act.
----------------------------------------------------------------------------------------------------------------
                                                  Foam Blowing
----------------------------------------------------------------------------------------------------------------
Polystyrene, Extruded Boardstock &   Ecomate TM as a         Acceptable.             OSHA established a
 Billet.                              substitute for CFCs                             permissible exposure limit
                                      and HCFCs.                                      for the main component of
                                                                                      Ecomate TM of 100 ppm for
                                                                                      a time-weighted average
                                                                                      over an eight-hour work
                                                                                      shift.
Phenolic Insulation Board &          Ecomate TM as a         Acceptable.             OSHA established a
 Bunstock.                            substitute for CFCs                             permissible exposure limit
                                      and HCFCs.                                      for the main component of
                                                                                      Ecomate TM of 100 ppm for
                                                                                      a time-weighted average
                                                                                      over an eight-hour work
                                                                                      shift.
Flexible Polyurethane..............  Ecomate TM as a         Acceptable.             OSHA established a
                                      substitute for CFCs                             permissible exposure limit
                                      and HCFCs.                                      for the main component of
                                                                                      Ecomate TM of 100 ppm for
                                                                                      a time-weighted average
                                                                                      over an eight-hour work
                                                                                      shift.
Polyurethane, Extruded Sheet.......  Ecomate TM as a         Acceptable.             OSHA established a
                                      substitute for CFCs                             permissible exposure limit
                                      and HCFCs.                                      for the main component of
                                                                                      Ecomate TM of 100 ppm for
                                                                                      a time-weighted average
                                                                                      over an eight-hour work
                                                                                      shift.
Polyolefin.........................  Ecomate TM as a         Acceptable.             OSHA established a
                                      substitute for CFCs                             permissible exposure limit
                                      and HCFCs.                                      for the main component of
                                                                                      Ecomate TM of 100 ppm for
                                                                                      a time-weighted average
                                                                                      over an eight-hour work
                                                                                      shift.
----------------------------------------------------------------------------------------------------------------
                                                Cleaning Solvents
----------------------------------------------------------------------------------------------------------------
Metal cleaning.....................  The Mini-Max Cleaner    Acceptable.
                                      [supreg] as a
                                      substitute for CFC-
                                      113, methyl
                                      chloroform, and HCFCs.
Electronics cleaning...............  The Mini-Max Cleaner    Acceptable.
                                      [supreg] as a
                                      substitute for CFC-
                                      113, methyl
                                      chloroform, and HCFCs.
Precision cleaning.................  The Mini-Max Cleaner    Acceptable.
                                      [supreg] as a
                                      substitute for CFC-
                                      113, methyl
                                      chloroform, and HCFCs.
----------------------------------------------------------------------------------------------------------------

[[Page 56893]]


                                                    Aerosols
----------------------------------------------------------------------------------------------------------------
Aerosol solvents...................  The Mini-Max Cleaner    Acceptable.
                                      [supreg] as a
                                      substitute for CFC-
                                      113, methyl
                                      chloroform, and HCFCs.
----------------------------------------------------------------------------------------------------------------
                                                   Sterilants
----------------------------------------------------------------------------------------------------------------
Sterilants.........................  The Mini-Max Cleaner    Acceptable.
                                      [supreg] as a
                                      substitute for CFC-
                                      12, HCFC-22, HCFC-
                                      124, and blends
                                      thereof.
----------------------------------------------------------------------------------------------------------------

[FR Doc. E6-15833 Filed 9-27-06; 8:45 am]

BILLING CODE 6560-50-P
