Visible coating of oil less than 0.1 centimeter thick; can be scraped off with a fingernail. An example of coat is seen here as a thin layer of oil on riprap.
Credit: Miles O. Hayes and Jacqueline Michel of Research Planning, Inc.
Oil or mousse more than 0.1 and less than 1 centimeter thick. An example of cover is seen here as oil covering a sand beach surface and running into a small trench.
Credit: Miles O. Hayes and Jacqueline Michel of Research Planning, Inc.
Fresh oil or mousse more than 1 centimeter thick. An example of pooled oil is seen here as an accumulation of oil around the large boulder in the foreground.
Credit: Miles O. Hayes and Jacqueline Michel of Research Planning, Inc.
Office of Response and Restoration
