An oil spill that has hit a tourist island in the Gulf of Thailand has spread to nearby smaller isles as workers race to clean up the once-white sands and clear waters.
The black tide of crude oil that washed up in Prao Bay on the west coast of Samet Island on Sunday night has been partly cleaned up, but the bay was still marred with oil slicks for the fourth straight day, said Rayong province deputy governor Supeepat Chongpanish.
"The situation is definitely better than the previous days," he said. "We are starting to see real waves and ocean foam at the north end of the bay, not the black waves of oil. It has significantly improved, but there's still work to do."
About 13,000 gallons of oil spilled into the Gulf of Thailand on Saturday morning from a leak in a pipeline operated by PTT Global Chemical, a subsidiary of state-owned oil and gas company PTT.
The company said it detected a leak when crude oil from a tanker moored offshore was being transferred to the pipeline 11 miles from a refinery in Map Ta Phut, one of the largest industrial estates in south east Asia. The leak has since been fixed.
The slick floated in the sea for more than a day before it began washing ashore on Samet, a small resort island that each year draws a million foreign and domestic tourists due to its white sand beaches and proximity to Bangkok, 90 miles away.
The company apologised and said the bay would be clean within three days, a goal questioned by environmental activists.
Marine and Coastal Resources provincial director Puchong Saritdeechaikul said that "there's no way it will be finished by that time," and added that his team detected a clear oil sheen that had spread to smaller isles off Samet's eastern shore.
He said that the marine centre was collecting daily samples of the seawater and that the results of quality tests were expected soon.
Provincial authorities ordered related tests on seafood caught off Rayong's coastline to see whether there was any contamination from the oil spill.