The Guardian | China: oil slick from sunken tanker trebles in size The Guardian Three coast guard vessels were on the scene on Sunday night assessing the spill, the Oceanic Administration said. The type of condensate oil carried by the Sanchi does not form a traditional surface slick when spilt but is nonetheless highly toxic to ... Oil slick off China coast trebles in size: Official China detects more oil slicks near tanker sinking site |