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# Table s of Alternatives for End - Uses Considered i n the Final Rule, Protection of Stratospheric Ozone: Change of Listing Status for Certain Substitutes Under the Significant New Alternatives Policy Program 

# July 2015

U.S. Environmental Protection Agenc y Stratospheric Protection Division Office of Atmospheric Programs Office of Air and Radiation

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# 1 **Substitutes for Newly**  **- Manufactured Light**  **- Duty**  **Motor Vehicle Air Conditioning Systems**  The r eferences to e nvironme ntal and health p roperties of acceptable substitutes , substitu t es acceptable to use conditions, and substitutes whose status will change under the final rule are summarized in the table below. (Substitutes previously listed as unaccep table are not included here.) Table 1 . Environmental and Health Properties of Refrigerants in Motor Vehicle Air Conditioning Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. Carbon Dioxide R - 744; CO 2 ; CAS # 124 - 38 - 9 Refer to SNAP R ule 14 . Evaporative Cooling N/A Refer to SNAP Final Rule. Freeze 12 HCFC - 142b/HF C - 134a ; (20/80) Refer to SNAP Notice 5 and SNAP Notice 25 . FRIGC FR - 12 R - 416A; HCFC Blend B eta; HCFC - 124/HFC 134a/HC - 600 ; (29/59/2) Refer to SNAP Rule 1 and SNAP Notice 8 . GHG - HP HCFC Blend Lam bda; HCFC - 22/HCFC 142b/HC - 600a ; (65/31/4) Refer to SNAP Notice 4 and SNAP Notice 25 .

GHG - X4 R - 41 4A; HCFC Blend Xi; HCFC - 22/HCFC 124/HCFC - 142b/HC 600a ; (51/28.5/16.5/4) Refer to SNAP Notice 5 and SNAP Notice 25 .

### 3 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. GHG - X5 HCFC - 22/HCFC 142b/HFC - 227ea/HC 600a ; (41/15/40/4) R efer to SNAP Notice 7 and SNAP Noti ce 25 . HCFC Blend Delta Free Zone ; RB - 276; HCFC - 142b/HFC 134a ; 

### (19/79) Refer to SNAP Notice 5 and SNAP Notice 25 . HFC - 152a 1,1 - difluoroethane; CAS # 75 - 34 - 3 Refer to SNAP Rule 14 and SNAP Notice 25 . HFO - 1234yf 2,3,3,3 - tetrafluoro - 1 - propene Refer to SNAP Rule 16 .

Hot Shot R - 414B; HCFC Blend Omicron; HCFC - 22/HCFC 124/HCFC - 142b/HC 600a (50/39/9.5/1.5) Refer to SNAP Notice 5 and SNAP Notice 25 .

Ikon A Ikon 12; Blend Zeta; HFC - 134a/HFC 152a/CF 3 I Refer to SNAP Notice 13. Refer to IPCC Fourth Asse ssment Report for GWP value.

Hot Shot R - 414B; HCFC Blend Omicron; HCFC - 22/HCFC 124/HCFC - 142b/HC 600a ; (50/39/9.5/1.5) Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment R eport for G WP v alue .

R - 401C SUVA MP 52; HCFC 22/HFC - 152a/HCFC 124 ; (33/15/ 52) Refer to SNAP Notice 5 and SNAP Notice 25 .

### 4 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute.
R - 406A HCFC - 22/HCFC 142b/HC - 600a ; (55/41/4) Refer to SNAP Notice 1 and SNAP Notice 25 .

R - 426A RS - 24 (new formulation); H FC - 125/HFC - 134a/HC 600/HC - 601a (5.1/93.0 / 1.3/0.6) Refer to SNAP Notice 21 and SNAP No tice 25 . SP34E Confidential composition Refer to SNAP Notice 14 and SNAP Notice 25 .

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# 2 **FOAM BLOWING AGENTS**  The references to e nvironme ntal and health p roperties of acceptable substitutes, substitutes acceptable to use conditions, and substitutes whos e status will change under the final rule for foam blowing agents are summarized in the tables below. The end - uses included in the foam blowing agent sector are the following: Rigid Polyurethane (PU) and Polyisocyanurate (PIR) Laminated Boardstock, Rigid P U: Appliance, Rigid PU: Spray, Rigid PU: Commercial Refrigeration, Rigid PU: Sandwich Panels, Rigid PU: Slabstock and Other, Polystyrene: Extruded Bo ardstock and Billet, Phenolic Insulation Board and Bunstock, Integral Skin PU, and Polyolefin. (Substitutes previously listed as unacceptable are not included here.) Table 2 . Environmental and Health Properties of Foam Blowing Agents Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptabili ty Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. 2 - Chloropropane Isopropyl chloride; CAS # 75 - 29 - 6 Refer to SNAP Final Rule , SNAP Notice 13, and SNAP Notice 25 .

AB Technology Reaction of formic acid with isocyanate to produce carbon monoxide and water/isocyanate reaction to generate carbon dioxide for the expansion of foam R efer to SNAP Final Rule .

Acetone 2 - propanone; CAS # 67 - 64 - 1 Refer to SNAP Notice 8 and SNAP Notice 25 . Commercia l b lends of HFC 365mfc & HFC 227ea, w/ 7 to 13% 227ea and remainder 365mfc HFC - 365mfc is also known as 1,1,1,3,3 - pentafluorobutane, CAS # 405 - 58 - 6 ; HFC 227ea is also known as 1,1,1,2,3,3,3 - heptafluoropropane; CAS # 431 - 89 - 0 . Refer to SNAP Notice 24 and SNAP Notice 25 .

### 6 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptabili ty Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. Commercial blends include 7% H FC 227ea/93% HFC - 365mfc and 13% HFC - 227ea/87% HFC - 365mfc. Blends of HFC 365mfc & HFC 245fa, >5% HFC 245fa See other rows in this table for more information on the component blowing agents Refer to SNAP Notice 2 4 and SNAP Notice 25

C3 - C6 Saturated light hydro carbons Examples: propane, butane, isobutane, n pentane, cyclopentane, hexane, cyclohexane Refer to SNAP Notice 1, SNAP Notice 12, and SNAP Notice 25 Carbon Dioxide CO 2 ; CAS # 124 - 38 - 9 Refer to SNAP Rul e 14 Ecomate TM methyl formate Refer to SNAP Notice 18 and SNAP Notice 21 . Electroset Technology A proprietary process that makes organic resins electrically semiconductive Refer to SNAP Notice 1 and SNAP Notice 25 . Exxsol Blowing Agents Blend contain ing light saturated hydrocarbons with 5 carbons Refer to SNAP Notice 11 and SNAP Notice 25 .

### 7 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptabili ty Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute.

HFO – 1336mzz(Z) Formacel® 1100; (Z) - 1,1,1,4,4,4 - hexafluorobut - 2 - ene; CAS # 692 - 49 - 9 Refer to SNAP Acceptability Determination 29 .

Formacel® B HFC Blend; Composi tion is claimed as CBI Refer to SNAP Notice 23 .

Formacel® TI HFC Blend; Composition is claimed as CBI Refer to SNAP Notice 24 and SNAP Notice 25 .

Formacel® Z - 6 HFC Blend; Composition is claimed as CBI Refer to SNAP Acceptability Determination 27 .

For mic Acid Methanoic acid; First listed as Proprietary Blowing Agent 1, or PBA 1; CAS #64 - 18 - 6 Refer to SNAP Notice 5, SNAP Notice 8, and SNAP Notice 25 .

### 8 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptabili ty Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute.

HCFC - 141b and blends thereof 1,1 - dichloro - 1 - fluoroethane; CAS # 1717 - 00 - 6 Refer to the SNAP Final Ru le and SNAP Notice 25 .

HCFC - 142b and blends thereof 1 - Chloro - 1,1 - difluoroethane; CAS # 75 - 68 - 3 Refer to SNAP Final Rule and SNAP Notice 25 .

HCFC - 22 and blends thereof Chlorodifluoromethane; CAS # 75 - 45 - 6 Refer to SNAP Final Rule and SNAP Notice 25 .

H FC - 134a 1,1,1,2 - tetrafluoroethane; CAS # 811 - 97 - 2 Refer to SNAP Final Rule , SNAP Notice 10 , and SNAP Notice 25 . HFC - 143a 1,1,1 - trifluoroethane; CAS # 420 - 46 - 2 Refer to SNAP Final Rule and SNAP Notice 1. Refer to IPCC Fourth Assessment Report for GWP valu e. HFC - 152a 1,2 - difluoroethane; CAS #75 - 37 - 6 Refer to SNAP Fina l Rule, SNAP Notice 10, and SNAP Notice 25 . HFC - 152a/ Saturated Light Hydrocarbon Blends See other rows in this table for more information on the component blowing agents Refer to SNAP Not ice 1, SNAP Notice 10, SNAP Notice 12, and SNAP Notice 25.

### 9 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptabili ty Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. HFC - 245fa 1,1,1,3,3 - pentafluoroethane; CAS # 460 - 73 - 1 Refer to SNAP Notice 11, SNAP Notice 18, and SNAP Notice 25 HFC - 365mfc 1,1,1,3,3 - pentafluorobutane; CAS # 405 - 58 - 6 Refer to SNAP Notice 24 and SNAP Notice 25 .

HFO - 1234ze t rans - 1,3,3,3 - tetrafluoroprop - 1 - ene; CAS # - 29118 - 24 - 9 Refer to SNAP Notice 24 and SNAP Notice 25 .

Methyl Formate Formic acid, Methylester ; Methyl methanoate; CAS # 107 - 31 - 3 Refer to SNAP Notice 14 and SNAP Notice 25 .

Methylal Dimethoxymethane; CAS # 109 - 87 - 5 Refer to SNAP Acceptability Determination 29 . Methylene Chloride Dichloromethane; CAS # 75 - 09 - 2 Refer to SNAP Final Rule and SNAP Notice 1. Refer to IPCC Fourth Assessment Report for GWP Value.

### 10 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptabili ty Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute.

Tran s - 1 - chlor o 3,3,3 - trifluoro prop - 1 - ene Solstice TM LBA; Solstice 1233zd(E); CAS # 102687 - 65 - 0 Refer to SNAP Notice 27 .

Transcend TM Technologies Composition is claimed as CBI Refer to SNAP Notice 20 . Vacuum Panels N/A Refer to SNAP Notice 2 and SNAP Notice 13 . Water H 2 O; CAS # 7732 - 18 - 5 Refer to SNAP Notice 10 .

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# 3 **AEROSOLS** The references to e nvironme ntal and health p roperties of acceptable substitutes, substitutes acceptable to use conditions, and substitutes whose status will change under the final rule fo r aerosol propellants are summarized in the tables below. (Substitutes previously listed as unacceptable are not included here.) Table 3 . Environmental and Health Properties of Aerosols Propellants Substitute Name Further Identification Information for S ubstitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. Alternative Processes Examples: pumps, mechanical pressure dispense rs, non - spray dispensers Refer to SNAP Final Rule. C 3 - C 6 Saturated light hydro carbons Examples: propane, n butane, isobutane Refer to SNAP Notice 1, SNAP Notice 12, and SNAP Notice 25. Carbon Dioxide CO 2 ; CAS # 124 - 38 - 9 Refer to SNAP Rule 14. Nitro gen N 2 ; CAS # 7727 - 37 - 9 Refer to SNAP Final Rule. Compressed Air N 2 /O 2 ; (79/21) Refer to SNAP Final Rule. Nitrous Oxide NO 2; CAS # 10024 - 97 - 2 Refer to SNAP Final Rule. Dimethyl Ether DME; Wood ether; Dymel A; CAS # 115 - 10 - 6 Refer to SNAP Final Rul e. Refer to IPCC Fourth Assessment Report for GWP value.

HCFC - 142b 1 - Chloro - 1,1 - difluoroethane; CAS ID # 75 - 68 - 3 Refer to SNAP Final Rule and SNAP Notice 25.

### 12 Substitute Name Further Identification Information for S ubstitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, and exposure limit for each listed substitute. HCFC - 22 Chlorodifluoromethane; CAS ID # 75 - 45 - 6 Refer to SNAP Final Rule and SNAP Notice 25.

HFC - 125 1,1,1,2,2 - pentafluoropropane; CAS ID # 354 - 33 - 6 Refer to SNAP Final Rule and SNAP Notice 25. Refer to IPCC Fourth Assessment Report for GWP value.

HFC - 134a 1,1,1,2 - tetrafluoropropane; CAS # 811 - 97 - 2 Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 25. HFC - 152a 1,1 - difluoroethane; CAS # 75 - 34 - 3 Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 25. HFC - 227ea 1,1,1,2,3,3,3 - heptafluoropropane; CAS # 431 - 89 - 0 Refer to SNAP Notice 10 and SNAP Notice 25. Refer to the IPCC Fourth As sessment Report for GWP value. HFO - 1234ze(E) HFC - 1234ze; trans - 1,3,3,3 - tetrafluoroprop - 1 - ene; CAS # 29118 - 24 - 9 Refer to SNAP Notice 25.

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# 4 **RETAIL FOOD REFRIGER ATION**  The references to e nvironme ntal and health p roperties of acceptable substitutes, su bstitutes acceptable to use conditions, and substitutes whose status will change under the final rule for retail food refrigeration are summarized in the table below. The end - uses included in retail food refrigeration are supermarket systems, condensing un its, stand - alone equipment, and vending machines. Substitutes that will be newly listed as acceptable under SNAP Notice 30 are also listed in the table. (Substitutes previously listed as unacceptable are not included here.) Table 4 . Environmental and Hea lth Properties of Refrigerants in Retail Food Refrigeration Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, a nd exposure limit for each listed substitute. Carbon Dioxide R - 744; CO 2 ; CAS # 124 - 38 - 9 Refer to SNAP Rule 14.

FOR12A Composition is claimed as CBI Refer to SNAP Notice 14. Refer to IPCC Fourth Assessment Report for GWP value. FOR12B Composition is claimed as CBI Refer to SNAP Notice 14. Refer to IPCC Fourth Assessment Report for GWP value.

HFC - 134a HFC - 134a; 1,1,1,2 - tetrafluoroethane; CAS # 811 - 97 - 2 Refer to SNAP Final Rule, SNAP Notice 10, and SNAP Notice 25.

ICOR AT - 22 HFC - 125/HFC - 134a/HC 29 0/HC - 600a ; ( 55/ 42.5/ 1/1.5) Refer to SNAP Notice 20 and SNAP Notice 25.

IKON A Ikon 12; Blend Zeta; Composition is claimed as CBI Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment Report for GWP value.

### 14 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, a nd exposure limit for each listed substitute. IKON B Composition is claimed as CBI Refer to SNAP Notice 13. Refer to IPCC Fourth Assessment Report for GWP value.

KDD6 Composition is claimed as CBI Refer to SNAP Notice 23.

R - 290 Propane; CARE 40; CAS #74 - 98 - 6 Refer to SNAP Final Rule, SNAP Rule 17, and SNAP Notice 25.

R - 404A HFC - 125/HFC - 143a/HFC 134a ; (44/52/ 4) Refer to SNAP Final Rule and SNAP Notice 17. Refer to IPCC Fourth Assessment Report for GWP value.

R - 407A Klea 60; Klea 407A; HFC - 32/HFC - 125/HFC 134a (20/40/40); CAS # 420 - 46 - 2 Refer to SNAP Notice 1, SNAP Notice 23, and SNAP N otice 25.

R - 407B Kl ea 61; HFC - 32/HFC - 125/HFC 134a; (10/70/20) Refer to SNAP Notice 1 and SNAP Notice 25.

### 15 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, a nd exposure limit for each listed substitute.

R - 407C Suva 407C; Klea 407C; HFC - 32/HFC - 125/HFC 134a ; (23/25/52) Refer to SNAP Notice 4, SNAP 17, and SNAP Notice 18. Refer to the IPCC Fourth Ass essment Report for GWP value.

R - 407F Genetron Performax LT; HFC - 32/HFC - 125/HFC 134a (30/30/40) Refer to SNAP Acceptability Determination 26.

R - 410A AZ - 20; Suva 9100; Puron; HFC - 32/HFC - 125 ; (50/50) Refer to SNAP Notice 4 and SNAP Notice 17. Refer to t he IPCC Fourth Assessment Report for GWP value.

R - 410B HFC - 32/HFC - 125 ; (45/55) Refer to SNAP Notice 4 and SNAP Notice 25.

R - 417A ISCEON - 59; NU - 22; HFC - 125/HFC - 134a/HC 600a ; (46.6/50/3.4); Refer to SNAP Notice 11 and SNAP Notice 25.

R - 417C ICOR; Hot Shot 2; HFC 125/HFC - 134a/HC - 600 (19.5/78.8/1.7) Refer to SNAP Acceptability Determination 26.

R - 421A Choice R - 421A; HFC - 125/HFC - 134a ; (58/ 42) Refer to SNAP Notice 21 and SNAP Notice 25.

### 16 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, a nd exposure limit for each listed substitute.

R - 422A ISCEON 7 9; HFC - 125/HFC - 134a/HC 600a ; (55/42/3) Refer to SN AP Notice 19. Refer to IPCC Fourth Assessment Report for GWP value.

R - 422B ICOR XAC1; HFC - 125/HFC - 134a/HC 600a ; (55/42/3) Refer to SNAP Notice 20 and SNAP Notice 25.

R - 422C ICOR XLT1; HFC - 125/HFC - 134a/HC 600a ; (82/15/3) Refer to SNAP Notice 20 and SNAP Notice 25.

R - 422D ISCEON MO29; HFC - 125/HFC - 134a/HC 600a ; (65.1/31.5/3.4) Refer to SNAP Notice 21 and SNAP Notice 25.

R - 424A RS - 44; HFC - 125/HFC - 134a/HC 600a/HC - 600/HC - 601a ; (50.5/47/0.9/1/0.6) Refer to SNAP Notice 21 and SNAP Notice 25.

R - 426A RS - 24 (new formulation); HFC - 125/HFC - 134a/HC 600/HC - 601a ; (5.1/93/ 1.3/0.6) Refer to SNAP Notice 21 and SNAP Notice 25.

### 17 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, a nd exposure limit for each listed substitute.

R - 427A H FC - 32/HFC - 125/HFC 134a/HFC - 143a ; (15/25/ 50/10) Refer to SNAP Notice 23 and SNAP Notice 25.

R - 437A MO49 PlusTM; HFC 125/HFC - 134a/H C 600/HC - 601 (19.5/78.5/ 1.4/0.6) Refer to SNAP Notice 25.

R - 438A KDD5; ISCEON MO99; HFC - 32/HFC - 125/HFC 134a/HC - 600/HC - 601a; (8.5/45.0/44.2/1.7/0.6) Refer to SNAP Notice 24 and SNAP Notice 25.

R - 441A HCR - 188C ; HC - 170/HC - 290/HC 600/HC - 600a; (3.1/54.8/ 36.1/6.0) Refer to SNAP Rule 17.

R - 448A Solstice® N - 40 ; HFC 32/HFC - 125/HFC 134a/HFO - 1234yf/HFO 1234ze(E); (26/26/21/20/7) Refer to SNAP Notice 30.

R - 449A Opteon® XP 40 ; HFC 32/HFC - 125/HFC 134a/HFO - 1234yf ; (24.3/24.7/25.7/25.3) Refer to SNAP Notice 30.

R - 450A Solstice® N – 13; HFC - 134a/HFO 1234ze(E) ; (42/58 ) Refer to SNA P Acceptability Determination 29 .

### 18 Substitute Name Further Identification Information for Substitute Reference to the applicable SNAP Rule, Notice, or Acceptability Determination for the ODP, GWP, VOC status, flammability rating, a nd exposure limit for each listed substitute. R - 507A HFC - 125/HFC - 143a ; (50/ 50) Refer to SNAP Final Rule, SNAP Notice 5, SNAP Notice 17, and SNAP Acceptability Determination 26.

R - 513A Opteon® XP 10 ; HFC 134a/HFO - 1234yf (44/56) Refer to SNAP Notice 30. R - 600a 2 - methylpropane; isobutane Refer to SNAP Rule 17. R - 717 Ammonia; NH 3 ; CAS # 7664 - 41 - 7 Refer to SNAP Final Rule, SNAP Notice 5, and SNAP Notice 25. RS - 24 (2002 formulation) Composition is claimed as CBI Refer to SNAP Notice 17 and SNAP 25. RS - 44 (2003 formulation) Composition is claimed as CBI Refer to SNAP Notice 18 and SNAP Notice 25.

SP34E Composition is claimed as CBI Refer to SNAP Notice 14, SNAP Notice 15, and SNAP Notice 25.

TH R - 02 Composition is claimed as CBI Refer to SNAP Notice 11.

THR - 03 Composition is claimed as CBI Refer to SNAP Notice 11.

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# REFERENCES Forster, P., V. Ramaswamy, P. Artaxo, T. Berntsen, R. Betts, D.W. Fahey, J. Haywood, J. Lean, D.C. Lowe, G. Myhre, J. Nganga, R. Prinn, G. Raga, M. S chulz and R. Van Dorland. 2007. Changes in Atmospheric Constituents and in Radiative Forcing. In: Climate Change 2007: The Physical Science Basis. Contribution of Working Group I to the Fourth Assessment Report of the Inte rgovernmental Panel on Climate Change [Solomon, S., D. Qin, M. Manning, Z. Chen, M. Marquis, K.B. Averyt, M.Tignor and H.L. Miller (eds.)]. Cambridge University Press, Cambridge, United Kingdom and New York, NY, USA. U.S. EPA. 1994. SNAP Final Rule. March 18, 1994. Available online at: http://www.epa.gov/ozone/fedregstr/59fr13044.html . U.S. EPA. 2010. Summary of Substitute Refrigerants Listed in SNAP Notice 25. Available online at: http://www.epa.gov/ozone/snap/refrigerants/Notice25SubstituteRefrigerants.pdf U.S. EPA. 2014. Substitute Refrigerants u nder SNAP as of October 21, 2014 . Available online a t: http://www.epa.gov/ozone/snap/refrigerants/reflist.pdf U.S. EPA. 2015 a . SNAP Regulations: SNAP Notices of Acceptability (Notices 1, 4, 5, 7, 8, 10, 11, 12, 13, 14, 15, 20, 21, 23, 24 , 26, 27, 29 , and 30 ). Available online at: http://www.epa.gov/spdpublc/snap/regulations.html U.S. EPA. 2015 b . SNAP Regulations: SNAP Rules (Rules 1, 14, 16 , and 17 ). Available online at: http://www.epa.gov/spdpublc/snap/regulations.html