Landfill Gas Monitoring Results (Retaining Wall F)

Monitoring Location Date Time Weather Temperature (°C) Methane (%) Oxygen (%) Carbon Dioxide (%)
Measurement Result Action Level Limit Level Measurement Result Action Level Limit Level Measurement Result Action Level Limit Level
Retaining Wall F 2/2/2015 8:00 Hazy 15 0.1 10 20 21.1 19 18 0.1 0.5 1.5
2/2/2015 14:00 19 0.1 10 20 21.1 19 18 0.2 0.5 1.5
3/2/2015 8:00 Fine 16 0.1 10 20 21.1 19 18 0.2 0.5 1.5
3/2/2015 14:00 19 0 10 20 21 19 18 0 0.5 1.5
4/2/2015 8:00 Fine 14 0.1 10 20 21.2 19 18 0 0.5 1.5
4/2/2015 14:00 18 0.1 10 20 21.1 19 18 0.1 0.5 1.5
5/2/2015 8:00 Rain 13 0.1 10 20 21.1 19 18 0 0.5 1.5
5/2/2015 14:00 17 0 10 20 21.1 19 18 0.1 0.5 1.5
6/2/2015 8:00 Rain 11 0.2 10 20 21.1 19 18 0 0.5 1.5
6/2/2015 14:00 15 0.1 10 20 21.2 19 18 0 0.5 1.5
7/2/2015 8:00 Hazy 15 0 10 20 21.1 19 18 0.1 0.5 1.5
7/2/2015 14:00 18 0.1 10 20 21 19 18 0 0.5 1.5
9/2/2015 8:00 Fine 14 0 10 20 21.2 19 18 0.1 0.5 1.5
9/2/2015 14:00 17 0.1 10 20 21 19 18 0 0.5 1.5
10/2/2015 8:00 Sunny 13 0 10 20 21.1 19 18 0 0.5 1.5
10/2/2015 14:00 17 0.1 10 20 21.1 19 18 0.2 0.5 1.5
11/2/2015 8:00 Sunny 14 0 10 20 21.1 19 18 0.1 0.5 1.5
11/2/2015 14:00 18 0 10 20 21.2 19 18 0 0.5 1.5
12/2/2015 8:00 Sunny 15 0.1 10 20 21.1 19 18 0.1 0.5 1.5
12/2/2015 14:00 21 0 10 20 21 19 18 0.2 0.5 1.5
13/2/2015 8:00 Sunny 15 0.1 10 20 21.2 19 18 0.1 0.5 1.5
13/2/2015 14:00 21 0 10 20 21.1 19 18 0 0.5 1.5
14/2/2015 8:00 Sunny 17 0.1 10 20 21.1 19 18 0.2 0.5 1.5
14/2/2015 14:00 21 0 10 20 21.2 19 18 0 0.5 1.5
16/2/2015 8:00 Hazy 18 0.1 10 20 21.1 19 18 0 0.5 1.5
16/2/2015 14:00 21 0.2 10 20 21.2 19 18 0.1 0.5 1.5
17/2/2015 8:00 Rain 18 0 10 20 21.1 19 18 0.1 0.5 1.5
17/2/2015 14:00 21 0 10 20 21.1 19 18 0 0.5 1.5
23/2/2015 8:00 Rain 18 0 10 20 21.1 19 18 0.1 0.5 1.5
23/2/2015 14:00 19 0 10 20 21.1 19 18 0 0.5 1.5
24/2/2015 8:00 Rain 17 0 10 20 21.1 19 18 0 0.5 1.5
24/2/2015 14:00 20 0 10 20 21.1 19 18 0 0.5 1.5
25/2/2015 8:00 Rain 19 0 10 20 21.1 19 18 0.1 0.5 1.5
25/2/2015 14:00 21 0 10 20 21.1 19 18 0 0.5 1.5
26/2/2015 8:00 Fine 19 0.1 10 20 21.1 19 18 0.2 0.5 1.5
26/2/2015 14:00 24 0 10 20 21.1 19 18 0 0.5 1.5
27/2/2015 8:00 Rain 18 0.1 10 20 21.1 19 18 0 0.5 1.5
27/2/2015 14:00 21 0 10 20 21.2 19 18 0.2 0.5 1.5
28/2/2015 8:00 Rain 17 0.1 10 20 21.2 19 18 0.1 0.5 1.5
28/2/2015 14:00 19 0.1 10 20 21.1 19 18 0 0.5 1.5

Remark:

Parameter Criteria Measurement
Oxygen Action Level < 19%
Limit Level < 18%
Methane Action Level > 10% LEL (> 0.5% v/v)
Limit Level > 20% LEL (>1% v/v)
Carbon Action Level > 0.5%
Dioxide Limit Level > 1.5%

Landfill Gas Monitoring Results (Retaining Wall B)

Monitoring Location Date Time Weather Temperature (°C) Methane (%) Oxygen (%) Carbon Dioxide (%)
Measurement Result Action Level Limit Level Measurement Result Action Level Limit Level Measurement Result Action Level Limit Level
Retaining Wall B 2/2/2015 8:20 Hazy 15 0.1 10 20 21.1 19 18 0.2 0.5 1.5
2/2/2015 14:20 19 0.1 10 20 21.1 19 18 0.1 0.5 1.5
3/2/2015 8:20 Fine 16 0 10 20 21.1 19 18 0.1 0.5 1.5
3/2/2015 14:20 19 0.1 10 20 21.1 19 18 0 0.5 1.5
4/2/2015 8:20 Fine 14 0 10 20 21.1 19 18 0.1 0.5 1.5
4/2/2015 14:20 18 0 10 20 21.2 19 18 0.2 0.5 1.5
5/2/2015 8:20 Rain 13 0 10 20 21.1 19 18 0.2 0.5 1.5
5/2/2015 14:20 17 0.1 10 20 21.1 19 18 0 0.5 1.5
6/2/2015 8:20 Rain 11 0.1 10 20 21.1 19 18 0.2 0.5 1.5
6/2/2015 14:20 15 0 10 20 21.1 19 18 0.1 0.5 1.5
7/2/2015 8:20 Hazy 15 0.1 10 20 21.1 19 18 0 0.5 1.5
7/2/2015 14:20 18 0.1 10 20 21.2 19 18 0.1 0.5 1.5
9/2/2015 8:20 Fine 14 0.1 10 20 21.1 19 18 0.1 0.5 1.5
9/2/2015 14:20 17 0.2 10 20 21.1 19 18 0 0.5 1.5
10/2/2015 8:20 Sunny 13 0 10 20 21.1 19 18 0.1 0.5 1.5
10/2/2015 14:20 17 0.1 10 20 21.1 19 18 0 0.5 1.5
11/2/2015 8:20 Sunny 14 0 10 20 21.1 19 18 0.2 0.5 1.5
11/2/2015 14:20 18 0.1 10 20 21.1 19 18 0 0.5 1.5
12/2/2015 8:20 Sunny 15 0.1 10 20 21.1 19 18 0.2 0.5 1.5
12/2/2015 14:20 21 0.1 10 20 21.2 19 18 0 0.5 1.5
13/2/2015 8:20 Sunny 15 0 10 20 21.1 19 18 0.1 0.5 1.5
13/2/2015 14:20 21 0 10 20 21.1 19 18 0 0.5 1.5
14/2/2015 8:20 Sunny 17 0.2 10 20 21.1 19 18 0.1 0.5 1.5
14/2/2015 14:20 21 0 10 20 21.1 19 18 0 0.5 1.5
16/2/2015 8:20 Hazy 18 0.1 10 20 21.1 19 18 0 0.5 1.5
16/2/2015 14:20 21 0 10 20 21.1 19 18 0.1 0.5 1.5
17/2/2015 8:20 Hazy 18 0.1 10 20 21.1 19 18 0 0.5 1.5
17/2/2015 14:20 21 0.1 10 20 21.1 19 18 0.1 0.5 1.5
23/2/2015 8:20 Rain 18 0 10 20 21.1 19 18 0.1 0.5 1.5
23/2/2015 14:20 19 0 10 20 21.1 19 18 0.2 0.5 1.5
24/2/2015 8:20 Rain 17 0.1 10 20 21.1 19 18 0.1 0.5 1.5
24/2/2015 14:20 20 0 10 20 21.1 19 18 0 0.5 1.5
25/2/2015 8:20 Rain 19 0.1 10 20 21.1 19 18 0.2 0.5 1.5
25/2/2015 14:20 21 0.1 10 20 21.1 19 18 0 0.5 1.5
26/2/2015 8:20 Fine 19 0.1 10 20 21.1 19 18 0.1 0.5 1.5
26/2/2015 14:20 24 0.1 10 20 21.1 19 18 0.2 0.5 1.5
27/2/2015 8:20 Rain 18 0.1 10 20 21.1 19 18 0.1 0.5 1.5
27/2/2015 14:20 21 0 10 20 21.2 19 18 0 0.5 1.5
28/2/2015 8:20 Rain 17 0.1 10 20 21.1 19 18 0 0.5 1.5
28/2/2015 14:20 19 0 10 20 21 19 18 0 0.5 1.5

Remark:

Parameter Criteria Measurement
Oxygen Action Level < 19%
Limit Level < 18%
Methane Action Level > 10% LEL (> 0.5% v/v)
Limit Level > 20% LEL (>1% v/v)
Carbon Action Level > 0.5%
Dioxide Limit Level > 1.5%

Contract No. HY/2013/12 – Tuen Mun - Chek Lap Kok Link - Northern Connection Toll Plaza and Associated Works

AUES

4th Monthly Environmental Monitoring and Audit (EM&A) Report – February 2015

Unit Concentrattion (%)

Measurement Result

25 20 15 10 5 0

Measurement Result Action Level Limit Level

Action Level Limit Level

Unit Concentrattion (%)

Unit Concentrattion (%)

22.0

21.0

20.0

19.0

18.0

17.0

16.0

Measurement Result Action Level Limit Level

1.6

1.4

1.2

1.0

0.8

0.6

0.4

0.2

0.0

Annotation: During 23 October 2014 to 28 February 2015, major construction activity was construction of retaining wall F and the specified works included excavation, rock breaking, blinding, formworking, steel-fixing and concreting. The weather condition varied from sunny to rainy. The monitoring data was provided by the Contractor followed to their QA/QC control.

Z:\Jobs\2014\TCS00715(HY-2013_12)\600\Monthly EM&A Report\February 2015\R0070v2.docx

Contract No. HY/2013/12 – Tuen Mun - Chek Lap Kok Link - Northern Connection Toll Plaza and Associated Works

AUES

4th Monthly Environmental Monitoring and Audit (EM&A) Report – February 2015

Unit Concentrattion (%)

Unit Concentrattion (%) Unit Concentrattion (%)

1.6

1.4

1.2

0.8

0.6

0.4

Measurement Result Action Level Limit Level

25 20 15 10 5 0

Measurement Result Action Level

22 21 20 19 18 17 16

Measurement Result Action Level

1

0.2 0

Annotation: During 23 October 2014 to 28 February 2015, major construction activity was construction of retaining wall B and the specified works included excavation, rock breaking, blinding, formworking, steel-fixing and concreting. The weather condition varied from sunny to rainy. The monitoring data was provided by the Contractor followed to their QA/QC control.

Z:\Jobs\2014\TCS00715(HY-2013_12)\600\Monthly EM&A Report\February 2015\R0070v2.docx