Workshop Report 24 PagesExecutive Summary Workshop Overview Introduction Workshop objectives Workshop structure Plenary presentations Introduction and stakeholder perspectives of persistence Screening for environmental persistence Experiences with higher tiered assessment of persistence Panel discussions on perspectives of persistence Syndicate discussions CONCLUSIONS AND RECOMMENDATIONS ABBREVIATIONS BIBLIOGRAPHY APPENDIX A: RESEARCH TOPICS IDENTIFIED AT THE 2007 WORKSHOP AND PROGRESS TO DATE APPENDIX B: PRESENTATIONS Introduction and stakeholder perspectives of persistence Welcome, introduction and summary of activities since the ECETOC / Environment Agency persistence workshop (2007) Regulatory overview of persistence assessment within EU Challenges with assessing degradation and persistence Current issues and challenges faced on the PBT working group with respect to persistence Screening for Environmental Persistence Assessing environmental persistence: balancing pragmatism with realism Modified and enhanced biodegradability testing Towards rationally designed hazard, risk and persistency assessment: putting the “Bio” back into biodegradation testing Challenges in the assessment of natural complex substances Experiences with higher tiered assessment of persistence Experiences with the OECD TG 308 with human pharmaceuticals Application of the OECD 307 study to assess the persistence of gas to liquid (GTL) fuel Hidden hazard or safe sink? Approaches to consider non-extractable residues in the regulatory assessment of chemicals 1 Understanding the relationship between extraction technique and bioavailability / bioaccessibility Strategies to identify degradation products and their risks Experiences with higher tier study designs to investigate the fate and behaviour of chemicals in the environment APPENDIX C: LIST OF PARTICIPANTS APPENDIX D: WORKSHOP PROGRAMME APPENDIX E: ORGANISING COMMITTEE Workshop structure Series of 20-minute talks and case studies; Syndicate sessions addressing specific questions; Plenary feedback; Further discussions; Conclusions and recommendations; Areas for future research.