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Three biodegradation studies are available for two streams in this category, all of which indicate that the streams cannot be considered readily biodegradable. The proprietary study with DCPD/Codimer Concentrate (CAS No. 68478-10-4), which is GLP compliant and followed OECD guideline 301F, showed that DCPD/Codimer Concentrate cannot be considered readily biodegradable as there was no measurable biodegradation observed over a 28 day testing period. The two studies for the stream CAS No. 68477-54-3 are GLP compliant studies following OECD guideline 301F. The average biodegradation in one of the studies was 43.87% by day 56 and in the other study was 6.48% on day 41.