Addendum At its eighth meeting, by its decision POPRC-8/2, the Persistent Organic Pollutants Review Committee adopted a risk profile on hexachlorobutadiene on the basis of the draft risk profile contained in document UNEP/POPS/POPRC.8/3. The text of the risk profile, as amended, is set out in the annex to the present addendum; it has not been formally edited.