…Ao Prao beach on the island of Koh Samet is the main impact zone of the 50,000 liters of oil…spilled during a faulty transfer operation between a tanker and a seabed pipeline… PTT Global Chemical, the partially state-owned oil giant…has claimed responsibility for the spill…A PTT spokesman says that 70% of the oil has been dealt with…Local fisherman say they've caught fewer fish over the last few days, but it's too early to estimate the damage to fish stocks…A PTT spokesman told CNN that the leak…happened as a tanker was transferring crude to an undersea pipe. A giant flexible rubber hose used to transport the oil began to leak…It's being sent to the manufacturer, Goodyear, for further tests. PTT is also defending accusations that it has underplayed the amount of oil that leaked…