Table 6.1 Sediment Quality Classification Criteria
Contaminants |
LCEL |
UCEL |
Heavy
Metal (mg/kg dry weight) |
||
Cadmium
(Cd) |
1.5 |
4 |
Chromium
(Cr) |
80 |
160 |
Copper
(Cu) |
65 |
110 |
Mercury
(Hg) |
0.5 |
1 |
Nickel
(Ni) |
40 |
40 |
Lead
(Pb) |
75 |
110 |
Silver
(Ag) |
1 |
2 |
Zinc
(Zn) |
200 |
270 |
Metalloid
(mg/kg dry weight) |
||
Arsenic |
12 |
42 |
Organic-PAHs
(µg/kg dry weight) |
||
PAHs
(Low Molecular Weight) |
550 |
3160 |
PAHs
(High Molecular Weight) |
1700 |
9600 |
Organic-non-PAHs
(µg/kg dry weight) |
||
Total
PCBs |
23 |
180 |
Source: Appendix A of ETWB TCW No. 34/2002
Management of Dredged / Excavated Sediment
Note: LCEL – Lower Chemical Exceedance Level
UCEL – Upper Chemical Exceedance Level