Lamma Power Station Extension - Air Quality Monitoring Data for unit L13 (Construction)

24-hr TSP (µg/m3)

1-hr TSP (µg/m3)

Date

Reservoir

 (AM1)

East Gate

 (AM2)

Ash Lagoon (AM3)

Tai Yuen Village (AM4)

Date

Time

Reservoir (AM1)

East Gate (AM2)

Ash Lagoon (AM3)

1/9/2026

22

28

15

42

1/9/2026

15:00 - 15:59

18

28

14

7/9/2026

25

26

18

42

16:00 - 16:59

28

38

18

13/9/2026

21

23

15

46

17:00 - 17:59

71

40

20

19/9/2026

33

34

22

53

7/9/2026

15:00 - 15:59

29

37

19

25/9/2026

33

40

20

63

16:00 - 16:59

35

40

21

 

 

 

 

 

17:00 - 17:59

21

32

23

 

13/9/2026

15:00 - 15:59

18

22

16

16:00 - 16:59

29

22

16

17:00 - 17:59

25

16

13

 

19/9/2026

15:00 - 15:59

20

17

15

 

16:00 - 16:59

61

45

27

 

17:00 - 17:59

60

54

31

 

25/9/2026

15:00 - 15:59

35

33

22

 

16:00 - 16:59

31

28

17

 

 

 

17:00 - 17:59

25

25

20

 

 

Lamma Power Station Extension - Air Quality Monitoring Data for unit L9 (Operation)

Date

Daily Maximum Stack NOx concentration (mg/Nm3)#

1/9/2026

55

2/9/2026

55

3/9/2026

58

4/9/2026

59

5/9/2026

55

6/9/2026

57

7/9/2026

52

8/9/2026

54

9/9/2026

55

10/9/2026

60

11/9/2026

59

12/9/2026

58

13/9/2026

53

14/9/2026

52

15/9/2026

54

16/9/2026

54

17/9/2026

55

18/9/2026

54

19/9/2026

52

20/9/2026

57

21/9/2026

52

22/9/2026

53

23/9/2026

56

24/9/2026

54

25/9/2026

57

26/9/2026

*

 

 

 

 

 

 

 

27/9/2026

55

 

 

 

 

 

 

 

28/9/2026

52

 

 

 

 

 

 

 

29/9/2026

51

 

 

 

 

 

 

 

30/9/2026

52

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Note:

 

 

 

 

 

# - Hourly average value.  Expressed as at 0¢XC, 101.325kPa, dry and corrected to 15% O2 condition.

 

 

 

 

* - Unit L9 was not on load.

 

 

 

 

 

 

 

 

 

^ - The NOx concentration was 80.8 mg/Nm3, which is below the Action Level of 81 mg/Nm3.

 

 

 

 

 

Lamma Power Station Extension - Air Quality Monitoring Data for unit L10 (Operation)

Date

Daily Maximum Stack NOx concentration (mg/Nm3)#

1/9/2026

3

2/9/2026

3

3/9/2026

3

4/9/2026

3

5/9/2026

3

6/9/2026

3

7/9/2026

3

8/9/2026

3

9/9/2026

3

10/9/2026

3

11/9/2026

3

12/9/2026

3

13/9/2026

3

14/9/2026

3

15/9/2026

3

16/9/2026

3

17/9/2026

3

18/9/2026

3

19/9/2026

3

20/9/2026

3

21/9/2026

3

22/9/2026

3

23/9/2026

3

24/9/2026

3

25/9/2026

3

26/9/2026

3

 

 

 

 

 

 

 

27/9/2026

3

 

 

 

 

 

 

 

28/9/2026

3

 

 

 

 

 

 

 

29/9/2026

3

 

 

 

 

 

 

 

30/9/2026

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¢XC, 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/Nm3)#

1/9/2026

2

2/9/2026

2

3/9/2026

2

4/9/2026

2

 

 

 

 

 

 

 

5/9/2026

2

 

 

 

 

 

 

 

6/9/2026

2

 

 

 

 

 

 

 

7/9/2026

2

8/9/2026

2

 

 

 

 

 

 

 

9/9/2026

2

 

 

 

 

 

 

 

10/9/2026

3

11/9/2026

3

12/9/2026

3

13/9/2026

3

14/9/2026

3

15/9/2026

3

 

 

 

 

 

 

 

16/9/2026

3

 

 

 

 

 

 

 

17/9/2026

3

 

 

 

 

 

 

 

18/9/2026

3

 

 

 

 

 

 

 

19/9/2026

3

 

 

 

 

 

 

 

20/9/2026

3

 

 

 

 

 

 

 

21/9/2026

3

 

 

 

 

 

 

 

22/9/2026

3

 

 

 

 

 

 

 

23/9/2026

3

 

 

 

 

 

 

 

24/9/2026

3

 

 

 

 

 

 

 

25/9/2026

3

 

 

 

 

 

 

 

26/9/2026

3

 

 

 

 

 

 

 

27/9/2026

3

 

 

 

 

 

 

 

28/9/2026

3

 

 

 

 

 

 

 

29/9/2026

3

 

 

 

 

 

 

 

30/9/2026

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¢XC, 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/Nm3)#

1/9/2026

3

2/9/2026

3

3/9/2026

3

4/9/2026

3

 

 

 

 

 

 

 

5/9/2026

3

 

 

 

 

 

 

 

6/9/2026

3

 

 

 

 

 

 

 

7/9/2026

3

 

 

 

 

 

 

 

8/9/2026

3

9/9/2026

3

 

 

 

 

 

 

 

10/9/2026

3

11/9/2026

4

12/9/2026

4

13/9/2026

4

14/9/2026

4

15/9/2026

4

 

 

 

 

 

 

 

16/9/2026

4

 

 

 

 

 

 

 

17/9/2026

4

 

 

 

 

 

 

 

18/9/2026

4

 

 

 

 

 

 

 

19/9/2026

4

 

 

 

 

 

 

 

20/9/2026

4

 

 

 

 

 

 

 

21/9/2026

4

 

 

 

 

 

 

 

22/9/2026

4

 

 

 

 

 

 

 

23/9/2026

4

 

 

 

 

 

 

 

24/9/2026

4

 

 

 

 

 

 

 

25/9/2026

4

 

 

 

 

 

 

 

26/9/2026

4

 

 

 

 

 

 

 

27/9/2026

4

 

 

 

 

 

 

 

28/9/2026

4

 

 

 

 

 

 

 

29/9/2026

4

 

 

 

 

 

 

 

30/9/2026

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¢XC, 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.