Ao Phrao bay on Koh Samet in Rayong province was hit by a devastating oil slick when crude oil leaked into the sea from an offshore pipeline at a refinery operated by PTT Global Chemical Plc (PTTGC) in Map Ta Phut industrial estate on July 27. Hundreds of experts and volunteers have been working to try to clean up the usually picturesque oil-drenched beach. Photos by Post Photographers.