Construction Phase Daily Piezometer Monitoring Results in January 2020

 

Date

Daily Piezometer Monitoring

38568-LDH1 (P)

TKO-LBH907

2-Jan-20

n.a.

17.59

3-Jan-20

n.a.

17.59

4-Jan-20

n.a.

17.59

6-Jan-20

n.a.

17.59

7-Jan-20

n.a.

17.59

8-Jan-20

n.a.

17.59

9-Jan-20

n.a.

Measured dry

10-Jan-20

n.a.

Measured dry

11-Jan-20

87.65

Measured dry

13-Jan-20

n.a.

Measured dry

14-Jan-20

n.a.

Measured dry

15-Jan-20

n.a.

Measured dry

16-Jan-20

n.a.

Measured dry

17-Jan-20

n.a.

Measured dry

18-Jan-20

n.a.

Measured dry

20-Jan-20

n.a.

Measured dry

21-Jan-20

n.a.

Measured dry

22-Jan-20

n.a.

Measured dry

23-Jan-20

n.a.

Measured dry

24-Jan-20

n.a.

Measured dry

29-Jan-20

n.a.

Measured dry

30-Jan-20

n.a.

Measured dry

31-Jan-20

n.a.

Measured dry

Action Level (mPD)

+74.65

+17.59

 

Note:

Bold Italic with underline means Action Level exceedance

n.a – The daily ground water level monitoring was not required as the tunnel construction activities were conducted out of +/- 50m of the piezometer gate.


Remark:

The piezometer gate TKO-LBH907 (P) had been found dry since 6 November 2019. According to the Construction Impact Assessment (CIA), TKO-LBH907 (P) was classified as Category 2, for which monitoring was no longer required when measured dry. Therefore, no further monitoring was required for this instrument and hence this instrument could be abandoned.