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)
3/1/2025	56	60	51	14	3/1/2025	15:00 - 15:59	82	92	73
9/1/2025	74	65	59	11		16:00 - 16:59	84	94	68
15/1/2025	61	59	48	35		17:00 - 17:59	77	82	67
21/1/2025	49	51	43	54	9/1/2025	15:00 - 15:59	95	78	67
27/1/2025	35	35	26	22		16:00 - 16:59	87	77	68
						17:00 - 17:59	80	72	67
					15/1/2025	15:00 - 15:59	61	69	52
						16:00 - 16:59	66	74	53
						17:00 - 17:59	63	77	54
					21/1/2025	15:00 - 15:59	52	81	61
						16:00 - 16:59	83	82	64
						17:00 - 17:59	70	55	56
					27/1/2025	15:00 - 15:59	30	57	27
						16:00 - 16:59	26	35	41
						17:00 - 17:59	52	25	37
Lamma Power Station Extension - Air Quality Monitoring Data for unit L9 (Operation)
Date	Daily Maximum Stack NOx concentration (mg/Nm^3)^#
1/1/2025	*
2/1/2025	70
3/1/2025	78
4/1/2025	*
5/1/2025	*
6/1/2025	73
7/1/2025	75
8/1/2025	77
9/1/2025	82^
10/1/2025	79
11/1/2025	79
12/1/2025	78
13/1/2025	77
14/1/2025	75
15/1/2025	79
16/1/2025	74
17/1/2025	77
18/1/2025	73
19/1/2025	*
20/1/2025	77
21/1/2025	75
22/1/2025	72
23/1/2025	69
24/1/2025	74
25/1/2025	70
26/1/2025	*
27/1/2025	79
28/1/2025	79
29/1/2025	*
30/1/2025	*
31/1/2025	*
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)^#
1/1/2025	4
2/1/2025	3
3/1/2025	4
4/1/2025	3
5/1/2025	4
6/1/2025	3
7/1/2025	8^
8/1/2025	4
9/1/2025	3
10/1/2025	4
11/1/2025	4
12/1/2025	4
13/1/2025	3
14/1/2025	3
15/1/2025	3
16/1/2025	3
17/1/2025	3
18/1/2025	3
19/1/2025	3
20/1/2025	3
21/1/2025	3
22/1/2025	3
23/1/2025	3
24/1/2025	3
25/1/2025	3
26/1/2025	3
27/1/2025	4
28/1/2025	4
29/1/2025	3
30/1/2025	3
31/1/2025	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 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)^#
1/1/2025	3
2/1/2025	5^
3/1/2025	5^
4/1/2025	5^
5/1/2025	5^
6/1/2025	5^
7/1/2025	6^
8/1/2025	6^
9/1/2025	5^
10/1/2025	*
11/1/2025	*
12/1/2025	3
13/1/2025	3
14/1/2025	5^
15/1/2025	4
16/1/2025	6^
17/1/2025	7^
18/1/2025	6^
19/1/2025	4
20/1/2025	4
21/1/2025	6^
22/1/2025	5^
23/1/2025	5^
24/1/2025	4
25/1/2025	4
26/1/2025	6^
27/1/2025	8^
28/1/2025	5^
29/1/2025	6^
30/1/2025	5^
31/1/2025	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 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)^#
1/1/2025	*
2/1/2025	*
3/1/2025	*
4/1/2025	*
5/1/2025	*
6/1/2025	*
7/1/2025	*
8/1/2025	*
9/1/2025	*
10/1/2025	*
11/1/2025	*
12/1/2025	*
13/1/2025	*
14/1/2025	*
15/1/2025	*
16/1/2025	*
17/1/2025	*
18/1/2025	*
19/1/2025	*
20/1/2025	*
21/1/2025	*
22/1/2025	*
23/1/2025	*
24/1/2025	*
25/1/2025	*
26/1/2025	*
27/1/2025	*
28/1/2025	*
29/1/2025	*
30/1/2025	*
31/1/2025	*
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 L12 was not on load. ^ - Unit L12 was operating with loading less than 266 MW.