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 6 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.