A view of the laboratory testing and assessment of oil spill dispersant efficiency

Abstract

This paper outlines the role of a dispersant in an oil spill plan and sets out criteria by which the product should be judged in terms of its dispersing efficiency and biodegradation. It reviews the mixing needed in a laboratory test relative to conditions associated with dispersant use at sea. An ideal set of requirements for a laboratory test and ways of assessment are discussed, stressing the importance of confirmation of these results by sea testing. After reviewing currently used tests, the test favoured by BP is described. Ideas are expressed for future efficiency-rating improvements.