Table 6.1 Baseline Sediment Quality at Sok Kwu Wan
Contaminants (mg kg-1) |
EPD Marine Sediment Monitoring Data in 1991 |
Sediment Quality Data from the Lantau Port & Western Harbour Development Studya |
Lower Chemical Exceedance Level (LCEL) |
Upper Chemical Exceedance Level (UCEL) |
Cadmium (Cd) |
9.1b |
< 0.5 |
1.5 |
4 |
Chromium (Cr) |
42 |
27 |
80 |
160 |
Copper (Cu) |
56 |
72 |
65 |
110 |
Mercury (Hg) |
0.06 |
0.57c |
0.5 |
1 |
Nickel (Ni) |
20 |
24 |
40 |
40 |
Lead (Pb) |
73 |
59 |
75 |
110 |
Zinc (Zn) |
120 |
136 |
200 |
270 |
a The data presented are averages of the marine sediment data taken in the period of November 1991 and December 1992
b > UCEL
c > LCEL & < UCEL