environment Chemical characterization of polycyclic aromatic hydrocarbons (PAHs) in 2013 Rayong oil spill-affected coastal areas of Thailand Siwatt Pongpiachan* School of Social and Environmental Development, National Institute of Development Administration (NIDA); M. Hattayanone; D. Tipmanee; O. Suttinun; C. Khumsup; I. Kittikoon; P. Hirunyatrakul 11 January 2017