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Destruction of Ozone Depleting Substances and High-GWP Foam


The American Carbon Registry (ACR), a nonprofit enterprise of Winrock International, has open for public comment an update to its Methodology for the Quantification, Monitoring, Reporting and Verification of Greenhouse Gas (GHG) Emissions Reductions from the Destruction of Ozone Depleting Substances (ODS) and High-Global Warming Potential (GWP) Foam. The original version of this Methodology was developed by EOS Climate and ACR and significantly and substantively updates and expands the California Air Resources Board (ARB) ODS Compliance Offset Protocol authored by EOS Climate that was first adopted by ARB in 2011 and subsequently revised in 2014.

Chloroflourocarbons (CFCs) and hydrochlorofluorocarbons (HCFCs) are coolants used in refrigeration and air conditioning systems, aerosol sprays and medical devices as well as in foam blowing agents for the manufacture of insulation and noise reduction in buildings, appliances, coolers, marine applications and industrial pipe insulation. CFCs and HCFCs are classified as Ozone Depleting Substances (ODS) because they deplete the stratospheric ozone layer, and they have extremely high GWPs, ranging from 4,750 to 10,900 more potent than CO2. 

The production and consumption of virgin CFCs and HCFCs is completely phased out in the U.S. and Canada. Some of the used ODSs continue to be recycled and reused in existing old equipment. This practice leads to these ODSs leaking into the atmosphere at rates estimated by the EPA to be up to 25 percent annually. A significant portion of these ODSs that remain in the end-of-life equipment also end up as ODS stockpiles with the eventual fate of leaking into the atmosphere if not recovered and destroyed.   

The currently approved version provides a framework for the quantification, monitoring, reporting and verification of GHG gas emission reductions associated with the sourcing and destruction in the U.S. and its territories of: 1) High global warming potential (GWP) ODS sourced from air conditioning and refrigeration equipment, medical aerosol applications and fire suppressants; 2) High-GWP foam blowing agents that are extracted from insulation foam; and 3) Insulation foam that contains blowing agent(s) with high GWP. Eligible sources of foam include those used in appliances, buildings, walk-in coolers, refrigerated transportation, refrigeration cases, pipe insulation and marine foam.

The public comment period is now closed.

Public Comment 

Approved Version

2. GHG emission reductions from industrial processes
File PDF document ODS v2.0 Public Comment Response
File PDF document ODS 2.0 Peer Review Draft