7.1
In accordance with the updated EM&A
Manual, monitoring of landfill gas (LFG) is required for the construction
works within the Ma Tso Lung Landfill (MTLL, close to KTN NDA) during the
construction phase. This section presents the results of landfill gas
measurements performed by the Contractor. Appendix
B shows the Limit Levels for the monitoring works.
7.2
The MTLL is situated in the vicinity of the
KTN NDA. A portion of the development falls within the MTLL and its 250m
Consultation Zone.
Monitoring Parameters
and Frequency
7.3
Monitoring parameters for Landfill gas
monitoring include Methane, Carbon dioxide and Oxygen.
7.4
According to the mitigation measures of the updated
EM&A Manual, measurements of the following frequencies should be carried
out according to the monitoring requirements and procedures specified in
Paragraphs 8.23 to 8.28 of EPD's Guidance Note, “LANDFILL GAS HAZARD ASSESSMENT
GUIDANCE NOTE”.
7.5
The frequency of monitoring of LFG was made reference
to the updated EM&A Manual - Monitoring of any LFG which may be migrated to
the site should be undertaken during construction of the infrastructure
and the development within the Consultation Zone and within MTLL when the works
involve confined spaces. Routine gas monitoring should be undertaken during
groundwork construction and in all excavations. Monthly gas monitoring should
also be conducted for set up on site such as offices,
stores etc.
7.6
Monitoring of oxygen, methane and carbon
dioxide was performed for the construction of infrastructure and the development within the
Consultation Zone and within MTLL when the works involved confined
spaces. In this reporting month,
the area required to be monitored for landfill gas are shown below and Figure 6 shows the landfill gas
monitoring locations.
Ø Excavation Locations: Portion
6b
Ø Manholes and Chambers: N/A
Ø Relocation of monitoring wells: N/A
Ø Any other Confined Spaces: Containers
in Portion 6b
7.7
Table 7.1 summarises the equipment employed by the Contractor for the
landfill gas monitoring.
Table 7.1 Landfill
Gas Monitoring Equipment
|
Equipment |
Model
and Make |
Quantity |
|
Portable gas detector |
Portable Biogas Analyzer IRCD4 (Serial
No. M230814007) |
1 |
7.8
In the reporting month, landfill gas
monitoring was carried out by the Contractor on 1 occasion at 6
monitoring stations. No Limit Level
exceedance for landfill gas monitoring was recorded in the reporting month. The
monitoring results are provided in Appendix
J. Copies of calibration certificates are attached in Appendix C.
7.9
Should any non-compliance of the criteria
occur, actions in accordance with the Event/Action Plan in Appendix N
would be carried out.