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)
6/9/2025	19	22	18	29	6/9/2025	15:00 - 15:59	19	33	32
12/9/2025	12	26	19	99		16:00 - 16:59	27	28	27
18/9/2025	16	19	13	25		17:00 - 17:59	17	19	10
24/9/2025	28	32	37	17	12/9/2025	15:00 - 15:59	9	43	5
30/9/2025	24	23	20	8		16:00 - 16:59	17	24	42
						17:00 - 17:59	13	12	21
					18/9/2025	15:00 - 15:59	16	25	21
						16:00 - 16:59	18	27	4
						17:00 - 17:59	15	10	6
					24/9/2025	15:00 - 15:59	29	46	25
						16:00 - 16:59	40	41	37
						17:00 - 17:59	24	40	96
					30/9/2025	15:00 - 15:59	22	32	23
						16:00 - 16:59	41	30	40
						17:00 - 17:59	25	25	37
Lamma Power Station Extension - Air Quality Monitoring Data for unit L9 (Operation)
Date	Daily Maximum Stack NOx concentration (mg/Nm^3)^#
1/9/2025	67
2/9/2025	66
3/9/2025	67
4/9/2025	67
5/9/2025	69
6/9/2025	73
7/9/2025	70
8/9/2025	*
9/9/2025	71
10/9/2025	70
11/9/2025	70
12/9/2025	71
13/9/2025	*
14/9/2025	*
15/9/2025	69
16/9/2025	69
17/9/2025	75
18/9/2025	71
19/9/2025	74
20/9/2025	*
21/9/2025	*
22/9/2025	72
23/9/2025	67
24/9/2025	*
25/9/2025	70
26/9/2025	71
27/9/2025	73
28/9/2025	73
29/9/2025	73
30/9/2025	74
Note:
# - Hourly average value. Expressed as at 0°C, 101.325kPa, dry and corrected to 15% O2 condition. ^ - The NOx concentration exceeded action level due to low relative humidity.
* - 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)^#
1/9/2025	4
2/9/2025	4
3/9/2025	3
4/9/2025	3
5/9/2025	3
6/9/2025	3
7/9/2025	3
8/9/2025	4
9/9/2025	4
10/9/2025	3
11/9/2025	4
12/9/2025	3
13/9/2025	3
14/9/2025	3
15/9/2025	4
16/9/2025	3
17/9/2025	4
18/9/2025	4
19/9/2025	3
20/9/2025	4
21/9/2025	4
22/9/2025	3
23/9/2025	3
24/9/2025	3
25/9/2025	3
26/9/2025	3
27/9/2025	4
28/9/2025	4
29/9/2025	4
30/9/2025	4
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)^#
1/9/2025	3
2/9/2025	4
3/9/2025	3
4/9/2025	4
5/9/2025	3
6/9/2025	3
7/9/2025	4
8/9/2025	4
9/9/2025	3
10/9/2025	3
11/9/2025	3
12/9/2025	3
13/9/2025	3
14/9/2025	3
15/9/2025	3
16/9/2025	4
17/9/2025	3
18/9/2025	3
19/9/2025	3
20/9/2025	3
21/9/2025	3
22/9/2025	3
23/9/2025	3
24/9/2025	3
25/9/2025	3
26/9/2025	3
27/9/2025	3
28/9/2025	3
29/9/2025	3
30/9/2025	3
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)^#
1/9/2025	4
2/9/2025	4
3/9/2025	4
4/9/2025	4
5/9/2025	4
6/9/2025	*
7/9/2025	*
8/9/2025	4
9/9/2025	4
10/9/2025	4
11/9/2025	4
12/9/2025	4
13/9/2025	4
14/9/2025	4
15/9/2025	4
16/9/2025	4
17/9/2025	4
18/9/2025	4
19/9/2025	4
20/9/2025	4
21/9/2025	4
22/9/2025	4
23/9/2025	4
24/9/2025	4
25/9/2025	4
26/9/2025	4
27/9/2025	*
28/9/2025	*
29/9/2025	4
30/9/2025	4
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.