He said the state of the several-kilometre-long beach can be divided into four levels:
Dark red: Some 100 metres of the beach near Wat Chang Chon is covered in thick dark-red sludge.
Red: A slightly less dense sludge that is covering up to 200 metres of the beach near the dark-red area.
Orange: A film of oil covering about 2km.
Yellow: Faint blotches of oil running along almost all of the beach.
Thon also confirmed that the oil spill has started affecting marine life in the area.