Environmental Permit
No. EP-138/2002
環境許可證編號EP-138/2002
Appendix
B (as referred to in Condition 4.8)
Water
Quality Standards for the Artificial Lake of the Water Recreation Centre at
Penny’s Bay
(Extract
of Table 5.9h of the EIA Report (Register No.: AEIAR-032/2000)
|
Water Quality Parameter |
Standard |
|
(a)
Aesthetic
appearance |
·
no
objectionable odours or discolouration of waters; ·
no
tarry residues, floating wood, articles made of glass, plastic or rubber; ·
no
visible mineral oil or lasting foam on the surface; ·
no
recognisable sewage-derived debris; ·
no
floating, submerged and semi-submerged objects of a size likely to cause
interference with the free movement of vessels or cause damage to vessels;
and ·
no
objectionable deposits. |
|
(b)
Bacteria |
<180 cfu 100 mL-1 of E. coli, measured as geometric mean. |
|
(c)
Dissolved
oxygen |
> 4 mg L-1 |
|
(d)
pH |
Within the range of 6 - 9 |
|
(e)
Temperature |
No discharges or human activities shall cause the
natural daily temperature range to change by more than 2°C. |
|
(f)
Salinity |
No discharges or human activities shall cause the
natural daily salinity range to change by more than 10%. |
|
(g)
Suspended
solids |
< 25 mg L-1, measured as annual
median. |
|
(h)
Ammonia |
< 0.021 mg L-1, as unionised form,
calculated as annual average. |
|
(i)
Nutrient |
Not to be present in quantities sufficient to
cause excessive or nuisance growth of algae or other aquatic plants. |
|
(j)
5-day
BOD |
< 5 mg L-1 |
|
(k)
COD |
<30 mg L-1 |
|
(l)
Dangerous
substances |
Not
in a quantity sufficient to pose a risk to any beneficial uses of the aquatic
environment. |