7.1
In accordance with the updated EM&A
Manual, monitoring of landfill gas (LFG) is required for 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 are
conducted referring to the updated EM&A Manual -Monitoring
of any LFG which may be migrated to the site should be undertaken during the
construction of 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 offices, stores etc. set up
on site.
7.6
Monitoring of oxygen, methane and carbon
dioxide was performed for construction of infrastructure and the development
within the Consultation Zone and within MTLL when the works involve 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 summarizes 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 |
RKI Eagle (Serial No. E094106) |
1 |
7.8
In the reporting month, landfill gas monitoring
was carried out by the Contractor at the aforesaid locations on 1 occasion with
5 monitoring stations. No Limit
Level exceedance for landfill gas monitoring was recorded in the reporting
month. The monitoring results are provided in Appendix G. Copies of calibration certificates are attached in Appendix C.
7.9
Should any project related non-compliance of
the criteria occur, action in accordance with the Action Plan in Appendix J would be carried out.