Table 5.3 Water Quality Monitoring Parameters and Frequency

Monitoring Stations	Parameters, unit	Depth	Frequency
IS1, IS2, IS3 IS4, CS1, CS2(A), SR1, SR2, SR3, SR6, ST1, ST2, ST3, SRA	· Temperature(°C) · pH(pH unit) · turbidity (NTU) · water depth (m) · salinity (ppt) · dissolved oxygen (DO) (mg/L and % of saturation) · suspended solids (SS) (mg/L)	· 3 water depths: 1m below sea surface, mid-depth and 1m above sea bed. · If the water depth is less than 3m, mid-depth sampling only. · If water depth less than 6m, mid-depth may be omitted.	· Impact monitoring: 3 days per week, at mid-flood and mid-ebb tides during the construction period of the Contract

Monitoring Stations

Parameters, unit

Depth

Frequency

IS1, IS2, IS3

IS4, CS1, CS2(A), SR1, SR2, SR3, SR6, ST1, ST2, ST3, SRA

· Temperature(°C)

· pH(pH unit)

· turbidity (NTU)

· water depth (m)

· salinity (ppt)

· dissolved oxygen (DO) (mg/L and % of saturation)

· suspended solids (SS) (mg/L)

· 3 water depths: 1m below sea surface, mid-depth and 1m above sea bed.

· If the water depth is less than 3m, mid-depth sampling only.

· If water depth less than 6m, mid-depth may be omitted.

· Impact monitoring: 3 days per week, at mid-flood and mid-ebb tides during the construction period of the Contract