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

AUES

36th Monthly Environmental Monitoring and Audit (EM&A) Report – October 2017

Annotation: During 1 to 31 October 2017, major construction activity at TD1 and the specified works included excavation, stitching, 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\2017\October 2017\R0350v2.docx

Landfill Gas Monitoring Results (TD1)

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
TD1 3/10/2017 8:00 Sunny 28 0.1 10 20 21.1 19 18 0.2 0.5 1.5
3/10/2017 14:00 34 0.1 10 20 21 19 18 0.1 0.5 1.5
4/10/2017 8:00 Cloudy 27 0.1 10 20 21 19 18 0.1 0.5 1.5
4/10/2017 14:00 31 0.1 10 20 20.9 19 18 0.1 0.5 1.5
6/10/2017 8:00 Sunny 27 0.1 10 20 21.1 19 18 0.1 0.5 1.5
6/10/2017 14:00 31 0.1 10 20 21 19 18 0.2 0.5 1.5
7/10/2017 8:00 Sunny 27 0.1 10 20 20.8 19 18 0.2 0.5 1.5
7/10/2017 14:00 32 0.1 10 20 20.9 19 18 0.2 0.5 1.5
9/10/2017 8:00 Fine 27 0.1 10 20 21 19 18 0.2 0.5 1.5
9/10/2017 14:00 31 0.1 10 20 20.9 19 18 0.1 0.5 1.5
10/10/2017 8:00 Fine 27 0.1 10 20 21 19 18 0.1 0.5 1.5
10/10/2017 14:00 32 0.1 10 20 21 19 18 0.1 0.5 1.5
11/10/2017 8:00 Cloudy 28 0.1 10 20 21 19 18 0.2 0.5 1.5
11/10/2017 14:00 32 0.1 10 20 21 19 18 0.2 0.5 1.5
12/10/2017 8:00 Fine 22 0.1 10 20 20.9 19 18 0.2 0.5 1.5
12/10/2017 14:00 27 0.1 10 20 21 19 18 0.1 0.5 1.5
13/10/2017 8:00 Cloudy 25 0.1 10 20 21.1 19 18 0.1 0.5 1.5
13/10/2017 14:00 30 0.1 10 20 21 19 18 0.2 0.5 1.5
14/10/2017 8:00 Hazy 23 0.1 10 20 21 19 18 0.1 0.5 1.5
14/10/2017 14:00 27 0.1 10 20 21.1 19 18 0.1 0.5 1.5
16/10/2017 8:00 Sunny 25 0.1 10 20 20.9 19 18 0.1 0.5 1.5
16/10/2017 14:00 28 0.1 10 20 20.9 19 18 0.2 0.5 1.5
17/10/2017 8:00 Rain 24 0.1 10 20 21 19 18 0.2 0.5 1.5
17/10/2017 14:00 28 0.1 10 20 20.8 19 18 0.2 0.5 1.5
18/10/2017 8:00 Fine 25 0.1 10 20 20.9 19 18 0.1 0.5 1.5
18/10/2017 14:00 30 0.1 10 20 21 19 18 0.2 0.5 1.5
19/10/2017 8:00 Hazy 24 0.1 10 20 21 19 18 0.1 0.5 1.5
19/10/2017 14:00 28 0.1 10 20 20.8 19 18 0.2 0.5 1.5
20/10/2017 8:00 Cloudy 23 0.1 10 20 21.1 19 18 0.1 0.5 1.5
20/10/2017 14:00 28 0.1 10 20 21 19 18 0.1 0.5 1.5
21/10/2017 8:00 Fine 24 0.1 10 20 20.9 19 18 0.1 0.5 1.5
21/10/2017 14:00 29 0.1 10 20 21 19 18 0.1 0.5 1.5
23/10/2017 8:00 Sunny 21 0.1 10 20 21 19 18 0.1 0.5 1.5
23/10/2017 14:00 28 0.1 10 20 20.9 19 18 0.2 0.5 1.5
24/10/2017 8:00 Sunny 23 0.1 10 20 21 19 18 0.1 0.5 1.5
24/10/2017 14:00 28 0.1 10 20 21.1 19 18 0.2 0.5 1.5
25/10/2017 8:00 Sunny 23 0.1 10 20 21 19 18 0.2 0.5 1.5
25/10/2017 14:00 28 0.1 10 20 21.1 19 18 0.2 0.5 1.5
26/10/2017 8:00 Sunny 22 0.1 10 20 21 19 18 0.2 0.5 1.5
26/10/2017 14:00 28 0.1 10 20 21.1 19 18 0.1 0.5 1.5
27/10/2017 8:00 Sunny 22 0.1 10 20 21.1 19 18 0.2 0.5 1.5
27/10/2017 14:00 29 0.1 10 20 21 19 18 0.2 0.5 1.5
30/10/2017 8:00 Cloudy 21 0.1 10 20 21.1 19 18 0.2 0.5 1.5
30/10/2017 14:00 25 0.1 10 20 21 19 18 0.2 0.5 1.5
31/10/2017 8:00 Fine 27 0.1 10 20 20.8 19 18 0.2 0.5 1.5
31/10/2017 14:00 33 0.1 10 20 20.9 19 18 0.1 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%