Table 4.3        Guidelines for Establishment of Action and Limit Levels for In-situ Monitoring Parameters

Parameter (unit)

Water Depth

Action Level

Limit Level

DO

(mg/L)

Surface and Middle

5%-ile of baseline data

4 mg/L or 1%-ile of baseline data

Bottom

5%-ile of baseline data

2 mg/L or 1%-ile of baseline data

Turbidity (NTU)

Depth average

95%-ile of baseline data or 120% of upstream control station¡¯s turbidity at the same tide of the same day

99%-ile of baseline data or 130% of turbidity at the upstream control station at the same tide of the same day