Contract No. DC/2007/10 – Design
and Construction of Hong Kong West Drainage Tunnel
Exceedance
Report
Eastern
Portal
(A) Exceedance
Report for Air Quality (1 hour TSP)
(NIL
in the
reporting month)
(B) Exceedance
Report for Air Quality (24 hours TSP)
(NIL
in the
reporting month)
(C) Exceedance
Report for Construction Noise
(NIL
in the reporting month)
Western
Portal
(D) Exceedance
Report for Air Quality (1 hour TSP)
(NIL
in the
reporting month)
(E)
Exceedance Report for Construction Noise
(NIL
in the reporting month)
(F)
Exceedance Report for Water Quality
(3, 23 and 30 June
Contract No. DC/2007/10
Design and Construction of Hong Kong West Drainage
Tunnel - Exceedance Report
Report No. 80604W-80603_S
Part A – Exceedance Summary Tables (
Table 1: Parameter – Suspended Solids (mg/L)
|
Station No. |
Tide |
Baseline Action Level (mg/l) |
Baseline Limit Level (mg/l) |
Measured value (mg/l) |
Control Station(s) |
Measured Value at Control Stations (mg/l) |
120% of Control Station Action Level (mg/l) |
130% of Control Station Limit Level (mg/l) |
Level Exceeded |
Justification* |
|
I1 |
Mid-ebb |
15.7 |
16.4 |
19.3 |
CE |
19.8 |
23.8 |
25.7 |
Limit |
(3) |
|
I2 |
17.8 |
Limit |
(3) |
|||||||
|
Intake A |
20.7 |
Limit |
(1) &
(3) |
|||||||
|
Intake B |
20.7 |
Limit |
(1) &
(3) |
|||||||
|
I2 |
Mid-flood |
19.5 |
CF |
17.5 |
21.0 |
22.8 |
Limit |
(3) |
||
|
Intake A |
17.7 |
Limit |
(1) &
(3) |
|||||||
|
Intake B |
16.0 |
Action |
(1) &
(3) |
*Remarks (1) – No construction activity was observed.
(2)
– No pollution discharge from construction activity was observed.
(3) – Control Station value already exceeded either the Baseline Action or
Limit Levels.
Contract No. DC/2007/10
Design and Construction of Hong Kong West Drainage
Tunnel - Exceedance Report
Report No. 80625W-80623_S
Part A – Exceedance Summary Tables (
Table 1: Parameter – Suspended Solids (mg/L)
|
Station No. |
Tide |
Baseline Action Level (mg/l) |
Baseline Limit Level (mg/l) |
Measured value (mg/l) |
Control Station(s) |
Measured Value at Control Stations (mg/l) |
120% of Control Station Action Level (mg/l) |
130% of Control Station Limit Level (mg/l) |
Level Exceeded |
Justification* |
|
I2 |
Mid-ebb |
15.7 |
16.4 |
17.0 |
CE |
16.0 |
19.2 |
20.8 |
Limit |
(2) & (3) |
|
I2 |
Mid-flood |
16.7 |
CF |
16.3 |
19.6 |
21.2 |
Limit |
(2) & (3) |
*Remarks (1) – No construction activity was observed.
(2)
– No pollution discharge from construction activity was observed.
(3) – Control Station value already exceeded either the Baseline Action or
Limit Levels.
Contract No. DC/2007/10
Design and Construction of Hong Kong West Drainage
Tunnel - Exceedance Report
Report No. 80703W-80630_S
Part A – Exceedance Summary Tables (
Table 1: Parameter – Suspended Solids (mg/L)
|
Station No. |
Tide |
Baseline Action Level (mg/l) |
Baseline Limit Level (mg/l) |
Measured value (mg/l) |
Control Station(s) |
Measured Value at Control Stations (mg/l) |
120% of Control Station Action Level (mg/l) |
130% of Control Station Limit Level (mg/l) |
Level Exceeded |
Justification* |
|
II |
Mid-ebb |
15.7 |
16.4 |
20.8 |
CE |
27.8 |
33.4 |
36.1 |
Limit |
(2) & (3) |
|
I2 |
22.7 |
|||||||||
|
Intake A |
23.3 |
(1) & (3) |
||||||||
|
Intake B |
25.3 |
|||||||||
|
II |
Mid-flood |
17.2 |
CF |
19.3 |
23.2 |
25.1 |
Limit |
(2) & (3) |
||
|
I2 |
21.0 |
|||||||||
|
Intake A |
23.0 |
(1) & (3) |
||||||||
|
Intake B |
21.2 |
*Remarks (1) – No construction activity was observed.
(2)
– No pollution discharge from construction activity was observed.
(3) – Control Station value already exceeded either the Baseline Action or
Limit Levels.