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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 published a 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 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.

Under the Montreal Protocol, the production of CFC refrigerants in the U.S. is phased out and the production of HCFCs will be almost completely phased out by 2020. However, the use of these ODS refrigerants is not prohibited, and standard practice is to recycle the refrigerant for reuse. This practice leads to ODS refrigerants leaking into the atmosphere at rates estimated by the EPA to be up to 25 percent annually.

The ACR Methodology provides a framework for the quantification, monitoring, reporting and verification of GHG gas emission reductions associated with the U.S. sourcing and destruction 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.

Approved Version

Process Documentation

11. Fugitive emissions from industrial gases
File PDF documentDestruction of ODS and High GWP Foam - public comment version
File PDF documentPublic Comments and Responses
File PDF documentPublic Comments Hudson Technologies
File PDF documentPublic Comments Iron Mountain
File PDF documentPublic Comments 3M
File PDF documentPeer Review Version of Methodology Destruction of ODS and High GWP Foam
File PDF documentACR Destruction of ODS and High GWP Foam Peer Review comments and responses
File PDF documentACR Destruction of ODS and High GWP Foam
File PDF documentACR Destruction of ODS and High GWP Foam v1.1
File PDF documentSummary of Changes v1.1
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