Table 5.

Hazard classification

Samples	Station	Classa	Toxicity
Whole bottom sediments	S1	III	Acute toxicity
	S2	II	Slight acute toxicity
	S3	III	Acute toxicity
Solid phases of sediments	S1	III	Acute toxicity
	S2	II	Slight acute toxicity
	S3	II	Slight acute toxicity
Pore water	S1	I	No acute toxicity
	S2	I	No acute toxicity
	S3	II	Slight acute toxicity

^aClass: I no acute toxicity PE < 20%; II slight acute toxicity 20% ≤ PE < 50%; III acute toxicity 50% ≤ PE < 75%; IV high acute toxicity 75% ≤ PE < 100%; very high acute toxicity PE ≥ 100%