Appendix Q to Subpart G of Part 82 - Unacceptable Substitutes Listed in the March 28, 2007 Final Rule, Effective May 29, 2007

Appendix Q to Subpart G of Part 82 - Unacceptable Substitutes Listed in the March 28, 2007 Final Rule, Effective May 29, 2007

Foam Blowing Unacceptable Substitutes

End-use	Substitute	Decision	Further information
- Rigid polyurethane commercial refrigeration - Rigid polyurethane sandwich panels - Rigid polyurethane slabstock and other foams	HCFC-22, HCFC-142b as substitutes for HCFC-141b	Unacceptable1 Closed cell foam products and products containing closed cell foams manufactured with these substitutes on or before December 1, 2017 may be used after that date	Alternatives exist with lower or zero-ODP.
- Rigid polyurethane and polyisocyanurate laminated boardstock - Rigid polyurethane appliance - Rigid polyurethane spray and commercial refrigeration, and sandwich panels - Rigid polyurethane slabstock and other foams - Polystyrene extruded insulation boardstock and billet - Phenolic insulation board and bunstock - Flexible polyurethane - Polystyrene extruded sheet	HCFC-22, HCFC-142b as substitutes for CFCs	Unacceptable2 Closed cell foam products and products containing closed cell foams manufactured with these substitutes on or before December 1, 2017 may be used after that date	Alternatives exist with lower or zero-ODP.

¹ For existing users of HCFC-22 and HCFC-142b as of November 4, 2005 other than in marine applications, the unacceptability determination is effective on March 1, 2008; for existing users of HCFC-22 and HCFC-142b as of November 4, 2005 in marine applications, including marine flotation foam, the unacceptability determination is effective on September 1, 2009. For an existing user of HCFC-22 or HCFC-142b that currently operates in only one facility that it does not own, and is scheduled to transition to a non-ODS, flammable alternative to coincide with a move to a new facility and installation of new process equipment that cannot be completed by March 1, 2008, the unacceptability determination is effective January 1, 2010.

² For existing users of HCFC-22 and HCFC-142b in polystyrene extruded insulation boardstock and billet and the other foam end-uses, as of November 4, 2005, the unacceptability determination is effective on January 1, 2010.

[81 FR 86885, Dec. 1, 2016]