Table
2.7 Guidelines for Establishment of Action
and Limit Levels proposed in the Work Procedure
|
Parameter (unit) |
Action |
Limit |
|
Dissolved
Oxygen (mg/L) (surface,
middle, bottom) |
Surface and middle 80%
of upstream control station at the same tide of the same day Bottom 80%
of upstream control station at the same tide of the same day |
Surface and middle 4
mg/L except 5mg/L for FCZ Bottom 2
mg/L |
|
SS
(mg/L) (depth
average) |
120%
of upstream control station’s SS at the same tide of the same day |
130%
of SS readings at the upstream control station at the same tide of same day
and specific sensitive receiver water quality requirements |
|
Turbidity
(NTU) (depth
average) |
120
% of upstream control station’s turbidity at the same tide of the same day |
130%
of turbidity at the upstream control station at the same tide of same day |
Notes:
1.
“Depth-average”
is calculated by taking the arithmetic means of reading of all three depths.
2.
For DO,
non-compliance of the water quality limit occurs when monitoring result is
lower than the limit.
3.
For SS and
turbidity, non-compliance of the water quality limits occur when monitoring
result is higher than the limits.