Bangkok Post reports "PTTGC has remained silent about what chemicals it is using but also said they could pose a hazard to the environment and people's health." [17] In 2012, a study found that Corexit increases the toxicity of oil by 52 times. It can remain in the ecological food chain for many years and cause widespread and long-lasting health impacts. "The use of dispersants is a solution that creates new and worse problems," Ms Arpa said. The main ingredients of Corexit include 2-Butoxyethanol which can comprise up to 60% of the dispersant and is known to harm the blood, kidneys, liver and central nervous system.[17] Some people swimming near Ko Samet have reported dizziness, and two beaches have been closed. Swimming is not recommended until more is known and the full environmental impacts have been independently verified. As of 20 August 2013, tourists are recommended to use caution if and when going swimming in the water, and to be careful of seafood for now. They should report dizziness of feeling unwell to the relevant authorities or to their embassy.