6.4 Water Quality Monitoring.

Water quality in terms of suspended solids, temperature and zinc, was carried out on thirteen occasions at WMS1 (upstream station) and WMS3 (downstream station).

The summary of results for water quality monitoring is summarized in the following tables. Detailed monitoring results are presented in Appendix VI. Graphical presentation of the suspended solids is shown in Figure 6.4.

Table 6.5 – Summary of Water Quality Monitoring Data (SS)

Date

WMS1

SS, (mg/L)

Baseline Trigger, Action & Target Level

(mg/L)

Daily Trigger Level

(mg/L)

Daily Action

Level

(mg/L

WMS3

SS, (mg/L)

Exceedance (Y/N)

02-Apr-02

29

18

35

38

19

N

04-Apr-02

15

18

18

20

10

N

06-Apr-02

16

18

19

20

12

N

09-Apr-02

22

18

26

29

19

N

11-Apr-02

19

18

22

24

19

N

12-Apr-02

45

18

54

59

21

N

15-Apr-02

21

18

25

27

16

N

17-Apr-02

18

18

22

23

14

N

20-Apr-02

19

18

23

25

19

N

22-Apr-02

16

18

19

21

10

N

24-Apr-02

15

18

17

19

11

N

25-Apr-02

21

18

25

27

14

N

29-Apr-02

26

18

31

33

19

N

Table 6.6 – Summary of Water Quality Monitoring Data (Zn)

Date

WMS1

Zn, (mg/L)

Trigger Level

Action Level

Target Level

WMS3

Zn, (mg/L)

Exceedance (Y/N)

02-Apr-02

<0.05

-

-

-

<0.05

N

04-Apr-02

<0.05

-

-

-

<0.05

N

06-Apr-02

<0.05

-

-

-

<0.05

N

09-Apr-02

<0.05

-

-

-

<0.05

N

11-Apr-02

<0.05

-

-

-

<0.05

N

12-Apr-02

<0.05

-

-

-

<0.05

N

15-Apr-02

<0.05

-

-

-

<0.05

N

17-Apr-02

<0.05

-

-

-

<0.05

N

20-Apr-02

<0.05

-

-

-

<0.05

N

22-Apr-02

<0.05

-

-

-

<0.05

N

24-Apr-02

<0.05

-

-

-

<0.05

N

25-Apr-02

<0.05

-

-

-

<0.05

N

29-Apr-02

<0.05

-

-

-

<0.05

N

Note: The levels of Suspended Solids (SS) and Zinc (Zn) are the averaged of duplicate samples.