Lamma Power Station Extension - Summary Results on Water Quality Monitoring

Maximum Outlet Temperature Rise (Deg. Celsius) of Cooling Water at C.W. Outfall No.3 Serving L9, L10 & L11

Weighted by Flowrates of Individual Streams (May 2024)

Date	Maximum Outlet Temperature Rise (Deg. Celsius)
1/5/2024	6.1
2/5/2024	6.3
3/5/2024	6.0
4/5/2024	6.2
5/5/2024	6.4
6/5/2024	6.4
7/5/2024	6.4
8/5/2024	6.2
9/5/2024	6.1
10/5/2024	6.4
11/5/2024	6.2
12/5/2024	6.0
13/5/2024	5.8
14/5/2024	5.8
15/5/2024	5.9
16/5/2024	6.2
17/5/2024	6.2
18/5/2024	6.2
19/5/2024	6.2
20/5/2024	6.1
21/5/2024	6.0
22/5/2024	6.3
23/5/2024	6.3
24/5/2024	7.3
25/5/2024	6.7
26/5/2024	6.1
27/5/2024	6.3
28/5/2024	6.4
29/5/2024	6.4
30/5/2024	6.3
31/5/2024	5.8

Maximum Outlet Temperature Rise (Deg. Celsius) of Cooling Water at C.W. Outfall No.4 Serving Unit L12

Weighted by Flowrates of Individual Streams (May 2024)

Date	Maximum Outlet Temperature Rise (Deg. Celsius)
1/5/2024	5.0
2/5/2024	5.4
3/5/2024	5.1
4/5/2024	6.0
5/5/2024	6.0
6/5/2024	6.7
7/5/2024	6.7
8/5/2024	6.7
9/5/2024	6.6
10/5/2024	6.6
11/5/2024	5.8
12/5/2024	5.9
13/5/2024	5.4
14/5/2024	5.6
15/5/2024	6.0
16/5/2024	6.6
17/5/2024	6.5
18/5/2024	6.5
19/5/2024	5.9
20/5/2024	6.0
21/5/2024	6.6
22/5/2024	6.3
23/5/2024	6.1
24/5/2024	6.6
25/5/2024	*
26/5/2024	6.4
27/5/2024	6.2
28/5/2024	6.5
29/5/2024	6.4
30/5/2024	6.2
31/5/2024	5.7

Note: * - Unit L12 was not on load.

Total Residual Chlorine Level at C.W. Outfall No. 3 (May 2024)

Date of sampling	10/05	22/05
Total Residual Chlorine, mg/L	0.20	0.40

Total Residual Chlorine Level at C.W. Outfall No. 4 (May 2024)

Date of sampling	10/05	22/05
Total Residual Chlorine, mg/L	0.10	0.30