Sediment and water contamination caused by the M/T Solar I Oil Spill in Southern Guimaras, Central Philippines


by: Ida G. Pahila*, Hilario S. Taberna Jr, Leandro G. Gamarcha, Jay O. Martizano and Sharon Rose B. de la Rama


About one month after the M/T Solar I oil spill in Southern Guimaras, surface sediment and water samples were collected to assess the extent of petroleum contamination. Among the contaminated shoreline and mangrove areas, Guiwanon and Taklong shore and Dungkaan mangrove have the highest level of Hexane Extractable Materials (HEM) and Polycyclic Aromatic Hydrocarbon (PAH) compounds relative to the unpolluted sediment sample from Igang, Guimaras and Tubbataha, Palawan. The extent of oil contamination in the intertidal zone of Taklong shore at low tide was 18 meters landward from the water and the highest level of HEM and PAH were observed in samples collected at the interface of the warer and the shore. However, BTEX (benzene, toluene, ethylbenzene and meta, ortho, para xylenes) in water and sediment samples collected 1 month after the oil spill are below minimum risk level, MRL (2ppm). This observation could be attributed to the higher rate of volatilization of most monoaromatic hydrocarbon (BTEX) with low flash points.

Keywords: PAH, BTEX,HEM