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

Workshop program Word of welcome by ir. L. Bijlsma (director Waterdienst) Opening and introduction Lectures Subgroup discussions Plenary presentation Evaluation and closure

Announcements

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

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

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

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

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

Ecological and economical vulnerable area’s

Torrey Canyon tonnes oil reached shoreline tonnes industrial dispersants

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

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

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

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

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

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

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

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

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)

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

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

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

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 Break and demo’s Presentation of subgroup results Evaluation and closing words