Gulf oil spill: After it hit beaches, where did it go?, Christian Science Monitor, September 15, 2010:
NOAA’s directives for Gulf Coast beach cleanup include cosmetically washing surface contamination, collecting tar balls, and removing the top layers of certain areas where oil is concentrated. ...
“They will never clean it all up,’’ says Doug Inkley, a senior scientist for the National Wildlife Federation. “It is impossible to remove all the oil from the environment. That cannot be done.”
Read the report here.