1. Wageningen IMARES is een samenwerkingsverband tussen Wageningen UR en TNO Application of dispersants on oil spills in the North Sea Workshop: The Hague, October 2, 2007

2. Workshop program 10.00 10.00Word of welcome by ir. L. Bijlsma (director Waterdienst) 10.15 10.15Opening and introduction 10.30 10.30Lectures 14.00 14.00Subgroup discussions 15.45 15.45Plenary presentation 16.30 16.30Evaluation and closure

3. Announcements

4. Word of welcome ir. L. Bijlsma (director Waterdienst)

5. Wageningen IMARES is een samenwerkingsverband tussen Wageningen UR en TNO Application of dispersants on oil spills in the North Sea Introduction

6. Workshop objective Learn…from other countries Discuss…about application in NL Recommend…on a Dutch decision tree …to arrive at a Decision Tree for the use of dispersants on the Dutch Continental Shelf

7. Workshop program 10.00 10.00Word of welcome by ir. L. Bijlsma (director Waterdienst) 10.15 10.15Opening and introduction 10.30 …LEARN 10.30Lectures …LEARN 14.00 …DISCUSS 14.00Subgroup discussions …DISCUSS 15.45 …RECOMMEND 15.45Plenary presentation …RECOMMEND 16.30 16.30Evaluation and closure

8. Capaciteitsnota 2006-2010 Objective How prepared is RWS for combating oil spills Which and where updating is required Background Goals defined in ‘Nota bestrijding milieugevaarlijke stoffen Noordzee 2000-2010’ Capacity is determined by protection of vulnerable areas National and international experience (e.g. Erika, Prestige) New in the Capaciteitsnota: Use of chemical dispersants

9. Ecological and economical vulnerable area’s

10. Torrey Canyon 1967 14.000 tonnes oil reached shoreline 10.000 tonnes industrial dispersants

11. Considerations for selection of strategy Analysis of the threat Assessment of (meteorological) conditions Evaluation of regional vulnerability

12. Use of dispersants Basic strategy is mechanical combatement Deployement of UK Maritime and Coastguard Agency, according to Bonn Agreement Coverage of DCS within 8 hours

13. To Spray or not To Spray? When is use of dispersants considered possible? acceptable? feasible?  Decision tree

14. Decision trees: To Spray or not To Spray? Source: CEDRE 2005

15. Decision trees: To Spray or not To Spray? Source: TNO 2004

16. Decision trees: To Spray or not To Spray? Source: TNO 2004

17. Decision trees: To Spray or not To Spray? Source: Lewis, 2007

18. Workshop objective  Learn…  Discuss…  Formulate recommendations… …to arrive at a Decision Tree for the use of dispersants on the DCS

19. 1. 1. Learn What are dispersants (Lewis) Which response options are in use (Huisman) Strategic/operational aspects of aircraft application (Frances) Vulnerability of the North Sea (v Dalfsen)

20. 2. 2. Discuss Approval of dispersants Bird vs fish debate Dealing with operational restrictions Monitoring of (short- and longterm) effects

21. 3. 3. Formulate recommendations formulate suggestions and recommendations to be used when developing a Decision Tree for use on the Dutch Continental Shelf

22. Workshop program - Lectures 10.30 10.30Different aspects of oil spill dispersants Alun Lewis, Oil Spill Consultant 11.15 11.15Current practice in response methods in the Bonn Agreement Sjon Huisman, Rijkswaterstaat 11.45 11.45Strategic & operational aspects of the application by aircraft Chris Frances, Maritime Coastguard Agency UK 12.30 – 13.30 Lunch 13.30 13.30Ecological sensitivity in the Dutch part of the North Sea Jan van Dalfsen, IMARES

23. Workshop program – Subgroup sessions 14.00Subgroup work Each divides 5 points (stickers) over subgroup questions Discussion start with highest rated question Each provides 1 recommendation on Post-It note Each is invited to answer other questions after the workshop!Sessions  Which criteria are important for the approval of specific dispersant products  How can different types of ecological impact of (un/)dispersed oil be compared  How can we deal with the operational restrictions in using dispersants  How should short and long term effects of dispersed oil be monitored 15.15 Break and demo’s 15.45 15.45 Presentation of subgroup results 16.30 16.30Evaluation and closing words