Gulf oil spill: After it hit beaches, where did it go?, Christian Science Monitor, September 15, 2010:
Yet it takes only minutes of digging into the sand [at Louisiana's Grand Isle State Park] to reveal a menace that experts say permanently threatens this picturesque landscape: pools of crude oil lurking less than a foot below the surface. ...
Twenty-one years after the Valdez spill, oil remains submerged in the beaches of Prince William Sound in Alaska.
The same is true in Massachusetts’ Buzzards Bay, where a 1969 spill released 175,000 gallons of diesel fuel; 41 years later, sampling shows oil three to eight inches below the land’s surface.
Read the report here.