Lamma Power Station Extension - Air Quality Monitoring Data for unit L13 (Construction)
24-hr TSP (µg/m^3)					1-hr TSP (µg/m^3)
Date	Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)	Tai Yuen Village (AM4)	Date	Time	Reservoir (AM1)	East Gate (AM2)	Ash Lagoon (AM3)
5/12/2025	67	73	60	15	5/12/2025	15:00 - 15:59	66	76	57
11/12/2025	44	64	43	25		16:00 - 16:59	67	68	62
17/12/2025	63	62	61	29		17:00 - 17:59	66	60	61
23/12/2025	34	36	33	15	11/12/2025	15:00 - 15:59	59	57	44
29/12/2025	38	36	37	26		16:00 - 16:59	47	53	44
						17:00 - 17:59	55	48	45
					17/12/2025	15:00 - 15:59	47	80	50
						16:00 - 16:59	65	54	55
						17:00 - 17:59	56	44	61
					23/12/2025	15:00 - 15:59	33	25	26
						16:00 - 16:59	20	26	21
						17:00 - 17:59	19	29	28
					29/12/2025	15:00 - 15:59	39	39	39
						16:00 - 16:59	57	48	48
						17:00 - 17:59	52	42	39
Lamma Power Station Extension - Air Quality Monitoring Data for unit L9 (Operation)
Date	Daily Maximum Stack NOx concentration (mg/Nm^3)^#
1/12/2025	76
2/12/2025	73
3/12/2025	78
4/12/2025	75
5/12/2025	76
6/12/2025	78
7/12/2025	*
8/12/2025	77
9/12/2025	80
10/12/2025	73
11/12/2025	75
12/12/2025	74
13/12/2025	*
14/12/2025	*
15/12/2025	79
16/12/2025	78
17/12/2025	79
18/12/2025	80
19/12/2025	77
20/12/2025	80
21/12/2025	*
22/12/2025	79
23/12/2025	79
24/12/2025	75
25/12/2025	*
26/12/2025	*
27/12/2025	*
28/12/2025	*
29/12/2025	79
30/12/2025	79
31/12/2025	76
Note:
# - Hourly average value. Expressed as at 0°C, 101.325kPa, dry and corrected to 15% O2 condition.
* - Unit L9 was not on load.
Lamma Power Station Extension - Air Quality Monitoring Data for unit L10 (Operation)
Date	Daily Maximum Stack NOx concentration (mg/Nm^3)^#
1/12/2025	*
2/12/2025	*
3/12/2025	*
4/12/2025	*
5/12/2025	*
6/12/2025	*
7/12/2025	*
8/12/2025	*
9/12/2025	*
10/12/2025	*
11/12/2025	*
12/12/2025	*
13/12/2025	*
14/12/2025	*
15/12/2025	*
16/12/2025	*
17/12/2025	*
18/12/2025	*
19/12/2025	*
20/12/2025	*
21/12/2025	*
22/12/2025	*
23/12/2025	*
24/12/2025	*
25/12/2025	*
26/12/2025	*
27/12/2025	*
28/12/2025	*
29/12/2025	*
30/12/2025	*
31/12/2025	*
The daily maximum stack NOx concentration complies with the Action/Limit Level for all unit loading ranges. Note: # - Hourly average value. Expressed as at 0°C, 101.325kPa, dry and corrected to 15% O2 condition. * - Unit L10 was not on load. ^ - Unit L10 was operating with loading less than 266 MW.
Lamma Power Station Extension - Air Quality Monitoring Data for unit L11 (Operation)
Date	Daily Maximum Stack NOx concentration (mg/Nm^3)^#
1/12/2025	4
2/12/2025	5^
3/12/2025	4
4/12/2025	4
5/12/2025	5^
6/12/2025	5^
7/12/2025	5^
8/12/2025	6^
9/12/2025	5^
10/12/2025	4
11/12/2025	5^
12/12/2025	4
13/12/2025	4
14/12/2025	5^
15/12/2025	7^
16/12/2025	5^
17/12/2025	7^
18/12/2025	5^
19/12/2025	6^
20/12/2025	4
21/12/2025	4
22/12/2025	6^
23/12/2025	6^
24/12/2025	4
25/12/2025	5^
26/12/2025	13^
27/12/2025	9^
28/12/2025	9^
29/12/2025	6^
30/12/2025	7^
31/12/2025	7^
The daily maximum stack NOx concentration complies with the Action/Limit Level for all unit loading ranges. Note: # - Hourly average value. Expressed as at 0°C, 101.325kPa, dry and corrected to 15% O2 condition. * - Unit L11 was not on load. ^ - Unit L11 was operating with loading less than 266 MW.
Lamma Power Station Extension - Air Quality Monitoring Data for unit L12 (Operation)
Date	Daily Maximum Stack NOx concentration (mg/Nm^3)^#
1/12/2025	4
2/12/2025	5^
3/12/2025	4
4/12/2025	5^
5/12/2025	5^
6/12/2025	5^
7/12/2025	4
8/12/2025	5^
9/12/2025	5^
10/12/2025	5^
11/12/2025	4
12/12/2025	5^
13/12/2025	4
14/12/2025	4
15/12/2025	5^
16/12/2025	4
17/12/2025	5^
18/12/2025	5^
19/12/2025	5^
20/12/2025	5^
21/12/2025	5^
22/12/2025	5^
23/12/2025	5^
24/12/2025	5^
25/12/2025	6^
26/12/2025	6^
27/12/2025	6^
28/12/2025	5^
29/12/2025	5^
30/12/2025	5^
31/12/2025	5^
The daily maximum stack NOx concentration complies with the Action/Limit Level for all unit loading ranges. Note: # - Hourly average value. Expressed as at 0°C, 101.325kPa, dry and corrected to 15% O2 condition. * - Unit L12 was not on load. ^ - Unit L12 was operating with loading less than 266 MW.