The photo below gives a pretty clear idea of just what kind of ooze is coating the beaches of Chungcheongnam-do.
The photo is from here (where more can be seen - note the difference between the contaminated and normal oysters). More on the disastrous oil spill can be found in the Donga Ilbo, Chosun Ilbo, Hankyoreh, Korea Times, and Joongang Ilbo.
I couldn't help but think of the Simpsons episode where Lisa goes to clean up a polluted beach after an oil spill but so many Hollywood stars had claimed spots on the beach that there was no room for her to help. Lee Hyori may have gotten all muddy in Africa, but now may be Kim Tae-hee's moment to get down and dirty after breaking a sweat serving food to the less fortunate in soon-to-be-razed Garibong-dong.
On a related note, I'm not sure if this was the best way for Samsung to draw attention away from its slush-fund-for-bribery scandal.