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 |
Rasi 700 BIO (Serial
No. 330055) |
1 |
Results and Observations
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
J. 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 N
would be carried out.