My foam supplier confirms that the foam he supplies is not PFOS based but produced via the telomer process. Is it OK for me to put this foam down the drain?
In short, No. Foams manufactured today use fluorosurfactants manufactured using a Telomer process. The degradation product from these foams is known as H-PFOS. There is currently not sufficient data to show whether these foam degradation products are as toxic or bioaccumulative as PFOS. However, they are known to be extremely persistent in the environment and remain as List 1 materials under the Ground Water Regulations 1998 and so must not be discharged to ground water. In terms of dealing with waste, all fluorinated foams should be dealt with by containment and treated to remove the fluorosurfactants.
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