Table 4.6 Calculated
Action and Limit Levels for In-situ Monitoring Parameters
|
Parameter
(unit) |
Monitoring locations |
Water Depth |
Action Level |
Limit Level |
|
DO (mg/L) |
All locations |
Surface and Middle |
6.3 |
6.0(1) |
|
Bottom |
6.2 |
5.8(1) |
||
|
Turbidity (NTU) |
B14, B10, B11, B12, B13,
B7, B8, B9 |
Depth average |
7.6 or 120% of upstream control station’s turbidity at the same tide of
the same day |
7.9 or 130% of upstream control station’s turbidity at the same tide of
the same day |
|
WSD5, WSD20, WSD19, WSD18,
WSD6, WSD7 |
10.8 or 120% of upstream control station’s turbidity at the same tide of
the same day |
11.7 or 130% of upstream control station’s turbidity at the same tide of
the same day |
||
|
WSD22, WSD9, WSD17, WSD10,
WSD11, WSD15 |
7.5 or 120% of upstream control station’s turbidity
at the same tide of the same day |
9.4 or 130% of upstream control station’s turbidity at the same tide of
the same day |
||
|
WSD12, WSD13, F1, B24, B25,
B26 |
8.0 or 120% of upstream control station’s turbidity at the same tide of
the same day |
8.7 or 130% of upstream control station’s turbidity at the same tide of
the same day |
||
|
F5 |
11.8(2) or
120% of upstream control station’s turbidity at the same tide of the same day |
11.8(2) or
130% of upstream control station’s turbidity at the same tide of the same day |
Notes:
1) The 1 percentile of the DO baseline data
for all water depths were selected as the limit levels, since the two
quantities were much higher than the recommended limit level of 4 mg/L and 2
mg/L.
2) The displayed quantities are rounded up
from 11.775 and 11.795 respectively.
- For DO,
non-compliance of the water quality limits occurs when monitoring result is
lower than the limit levels.
-
For turbidity, non-compliance of water quality
limits occurs when monitoring result is higher than the limit levels.