Contents
Executive Summary
1.1
Purpose of the Report
1.2
Structure of the Report
2.1
Background
2.2
General Site Description
2.3
Major Activities Undertaken
2.4
Project Organisation and Management
Structure
2.5
Status of Environmental Approval Documents
3
Environmental Monitoring and Audit Requirements
3.1
Environmental Monitoring
3.1.1
Air Quality
3.1.2
Odour
3.2
Site
Audit
3.2.1
Water
Quality
3.2.2
Landscape and Visual
4.1
Air Quality
4.1.1
Commissioning Phase Monitoring
4.1.2
Operation Phase Monitoring
4.2
Odour
4.2.1
Commissioning Phase Monitoring
4.2.2
Operation Phase Monitoring
4.3
Water Quality
4.3.1
Construction Phase Monitoring
4.3.2
Operation Phase Monitoring
4.4
Waste Management
4.4.1
Construction Phase Monitoring
4.4.2
Operation Phase Monitoring
5.1
Environmental Site Audit
5.1.1
Construction Phase
5.1.2
Operation Phase
5.2
Landscape and Visual Audit
6
Environmental Non-conformance
6.1
Summary of Environmental Non-Compliance
6.2
Summary of Environmental Complaint
6.3
Summary of Environmental Summon and
Successful Prosecution
7.1
Key Issues for the Coming Month
LIST OF ANNEXES
|
Annex A |
|
|
Annex B |
|
|
Annex C |
|
|
Annex D |
|
|
Annex E |
|
|
Annex F |
|
|
Annex G |
|
|
Annex H |
|
|
Annex I |
Environmental
complaint, Environmental Summons and Prosecution Log |
|
Annex J |
|
|
Annex K |
EXECUTIVE
SUMMARY
The construction works of No.
EP/SP/61/10 Organic Resources Recovery Centre Phase 1 (the
Project) commenced on 21 May
2015. This is the 17th quarterly Environmental Monitoring and
Audit (EM&A) report presenting the EM&A works carried out during the
period from 1 June 2019 to 31 August 2019 in accordance with the EM&A
Manual. Substantial completion of the construction works was confirmed on
3 December 2018. In the meantime, the operation phase EM&A programme
had commenced in March 2019.
Summary of Works
undertaken during the Reporting Month
Works undertaken in the reporting
month included:
·
Operation of the Project, including organic waste reception, and operation of
the pre-treatment facilities, anaerobic digesters, composting facilities, air
pollution control systems, on-line emission monitoring system for the
Centralised Air Pollution Control Unit (CAPCS), Co-generation Units (CHP)s and
Ammonia Stripping Plant (ASP), and the wastewater treatment plant;
·
Process fine-tune, including adjustment of the ASP with new treatment media,
modification of Continuous Environmental Monitoring System (CEMS) and Supervisory
Control and Data Acquisition System (SCADA) rectification and improvement works
following equipment failures and the alteration of different operation modes
and measures to adapt to the high variation of SSOW nature and sources; and
·
Construction of the Visitor Centre.
Environmental
Monitoring and Audit Progress
Air Quality
Monitoring
Exceedances on Dust, NOx,
VOCs and NH3 from ASP were recorded on the on-line monitoring system in June
2019. Exceedances on NOx, SO2 and VOCs (including
methane) from CHP and on NOx, SO2 and NH3 from ASP were
recorded on the on-line monitoring system in July 2019. Exceedances on
Dust (or TSP), NOx, SO2, HCl and HF from CHP and on
Carbon Monoxide, NOx, SO2, VOCs (including methane) and
NH3 from ASP were recorded on the on-line monitoring system in August
2019. It should be noted that measurements recorded under
abnormal operating conditions, e.g. start up and stopping of stacks, unstable
operation, test runs and interference of sensor, are disregarded.
Exceedances in emission parameters
of CHP and ASP were found to be a result of problems with the tripping of the
circulation pump resulting in the incomplete desulphurisation of biogas which
fed to the CHPs, continuous fine-tuning of CHP setting, incomplete
desulphurisation of biogas which fed to the CHPs, and tripping and stopping of
ASP and the incomplete thermal combustion of the thermal combustion unit of the
ASP.
The Contractor has implemented
mitigation measures to control the exceedance (including the re-adjustment for
NOx control for CHP; continuous monitoring and routine maintenance
of the desulphurisation column is carried out; and tuning the thermal
combustion unit of the ASP to optimise combustion efficiency and overall
performance).
The Contractor has implemented
mitigation measures to control the exceedance by further fine-tuning the
thermal combustion unit of the ASP to optimise combustion efficiency and
overall performance.
The Contractor is recommended to
closely monitor the processes, including the desulphurisation process, and
combustion of biogas in the ASP to rectify any abnormal operating
conditions.
Odour Patrol
Odour patrol was conducted by the
independent odour patrol team of ALS Technichem (HK) Pty Ltd on 19 & 23
July 2019 and 6 August 2019. No Level 2 Odour Intensity was recorded
during odour patrols.
Water Quality
No
non-compliance to the effluent discharge limit stipulated in the discharge
licence issued by the EPD under the Water Pollution Control Ordinance
was recorded during this reporting period.
Waste Management
Waste generated from the
construction of the Project includes inert construction and demolition
(C&D) materials (public fill) and non-inert C&D materials (construction
wastes).
Inert C&D materials (public
fill) include bricks, concrete, building debris, rubble and excavated spoil. In
total, 30.76 tonnes of inert C&D material were generated from the
construction of the Project.
Non-inert C&D materials
(construction wastes) from the construction of this Project include metals,
paper/ cardboard packaging waste, plastics and other wastes such as general
refuse. 0.00 kg of metals, 0.00 kg of papers/ cardboard packing and 0.00
kg of plastics were sent to recyclers for recycling during the reporting period.
21.18 tonnes of general refuse was disposed of at the landfill.
0.00 L of chemical waste was
collected by licenced waste collector from the construction of the Project.
Waste generated from the operation
of the Project includes chemical waste, waste generated from pre-treatment
process and general refuse.
40 L of chemical waste was
collected by licenced waste collector from the operation of the Project.
1,422.07 tonnes of waste generated
from pre-treatment process from the operation of the Project was disposed of at
landfill. Among the recyclable waste generated from pre-treatment process
from the operation of the Project, 0.00 kg of metals, 0.00 kg of papers/
cardboard packing and 0.00 kg of plastics were sent to recyclers for recycling
during the reporting period.
Around 8.87 tonnes of general
refuse from the operation of the Project was disposed of at landfill.
Among the recycled general refuse from the operation of the Project, 0.00 kg of
metals, 0.00 kg of papers/ cardboard packing and 0.00 kg of plastics were sent
to recyclers for recycling during the reporting period.
Findings of
Environmental Site Audit
A
summary of the monitoring activities undertaken in this reporting period is
listed below:
|
· Joint Environmental Site Inspections |
13 times |
|
· Landscape & Visual Inspections |
6 times |
Weekly
joint environmental site inspections were carried out. The environmental
control/ mitigation measures (related to air quality, water quality, waste
(including land contamination prevention), hazard-to-life and landscape and
visual) recommended in the approved EIA Report and the EM&A Manual were
properly implemented by the Contractor during the reporting month.
Environmental
Exceedance/Non-conformance/Compliant/Summons and Prosecution
Exceedances for the air emission
limits for the CAPCS, CHP and ASP stacks were recorded during the reporting
period.
Incidents related to the release of
biogas occurred on 18 June 2019 and 25 August 2019. The incident has been
resolved.
No complaint/ summon/prosecution was
received in this reporting period.
Future Key
Issues
Activities to be undertaken in the
next reporting month include:
·
Operation of the Project.
·
Implementation of further measures to control the air emission from the CHP and
ASP.
·
Continue construction of the Visitor Centre.
1
inTroduction
ERM-Hong Kong,
Limited (ERM) was appointed by OSCAR Bioenergy Joint Venture (the Contractor)
as the Environmental Team (ET) to undertake the construction Environmental
Monitoring and Audit (EM&A) programme for the Contract No.
EP/SP/61/10 of Organic Waste Treatment Facilities Phase I, which the
project name has been updated to Organic Resources Recovery Centre (Phase
I) (the Project) since November 2017.
ERM was also appointed by the Contractor to undertake the operation EM&A
programme starting 1 March 2019.
1.1
Purpose of the Report
This
is the 17th Quarterly EM&A report which summarises the
monitoring results and audit findings for the EM&A programme during the
reporting period from 1 June 2019 to 31 August 2019.
1.2
Structure of the Report
The
structure of the report is as follows:
Section
1: Introduction
It details the
scope and structure of the report.
Section 2: Project Information
It summarises the background and scope of the Project,
site description, project organisation and status of the Environmental Permits
(EP)/licences.
Section
3: Environmental Monitoring and Audit Requirements
It
summarises the environmental monitoring requirements including monitoring
parameters, programmes, methodologies, frequency, locations, Action and Limit
Levels, Event/Action Plans, as well as environmental audit requirements as
recommended in the EM&A Manual and approved EIA report.
Section
4: Monitoring Results
It
summarises monitoring results of the reporting period.
Section
5: Site Audit
It
summarises the audit findings of the environmental as well as landscape and
visual site audits undertaken within the reporting period.
Section
6: Environmental Non-conformance
It
summarises any exceedance of environmental performance standard, environmental
complaints and summons received within the reporting period.
Section
7: Further Key Issues
It
summarises the impact forecast for the next reporting month.
Section
8: Conclusions
2
Project information
2.1
Background
The
Organic Resources Recovery Centre (ORRC) Phase I development (hereinafter
referred to as “the Project”) is to design, construct and operate a biological
treatment facility with a capacity of about 200 tonnes per day and convert
source-separated organic waste from commercial and industrial sectors (mostly
food waste) into compost and biogas through proven biological treatment
technologies. The location of the Project site is shown in Annex A.
The environmental acceptability of the construction and operation of the
Project had been confirmed by findings of the associated Environmental Impact
Assessment (EIA) Study completed in 2009. The Director of Environmental Protection
(DEP) approved this EIA Report under the Environmental Impact Assessment
Ordinance (EIAO) (Cap. 499) in February 2010 (Register No.: AEIAR-149/2010) (hereafter referred to as the approved EIA Report).
Subsequent Report on Re-assessment on Environmental Implications and Report on
Re-assessment on Hazard to Life Implications were completed in 2013,
respectively.
An Environmental Permit (EP) (No. EP-395/2010) was issued by the DEP to the EPD (Project Team), the
Permit Holder, on 21 June 2010 and varied on 18 March 2013 (No. EP-395/2010/A)
and 21 May 2013 (No. EP-395/2010/B), respectively. The Design Build and
Operate Contract for the ORRC Phase 1 (Contract No. EP/SP/61/10 Organic
Resources Recovery Centre (Phase 1) (the Contract)) was awarded to SITA Waste
Services Limited, ATAL Engineering Limited and Ros-Roca, Sociedad Anonima
jointly trading as the OSCAR Bioenergy Joint Venture (OSCAR or the
Contractor). A Further EP (No. FEP-01/395/2010/B) was issued by the DEP
to the OSCAR on 16 February 2015. Variation to both EPs (Nos.
EP-395/2010/B and FEP-01/395/2010/B) were made in December 2015. The
latest EPs, Nos. EP-395/2010/C and FEP-01/395/2010/C, were issued by the DEP on
21 December 2015.
Under the requirements of Condition 5 of the EP (No. FEP-01/395/2010/C),
an Environmental Monitoring and Audit (EM&A) programme as set out in the
approved EM&A Manual (hereinafter referred to as EM&A Manual) is
required to be implemented during the construction and operation of the
Project. ERM-Hong Kong, Ltd (ERM) has been appointed by OSCAR as the
Environmental Team (ET) for the construction phase EM&A programme and the
Monitoring Team (MT) for the operation phase EM&A programme for the
implementation of the EM&A programme
in accordance with the requirements of the EP and the approved EM&A Manual.
The construction works commenced on 21 May 2015. The operation
phase of the EM&A programme commenced on 1 March 2019 ([1]).
2.2
General Site Description
The
Project Site is located at Siu Ho Wan in North Lantau with an area of about 2
hectares. The layout of the Project Site is illustrated
in Annex A.
The facility received and treated an average of 100 tonnes of source separated
organic waste per day during the reporting month.
2.3
Major Activities Undertaken
A
summary of the major activities undertaken in the reporting period is shown in Table
2.1. The site layout plan is shown in Annex B.
The construction programme is shown in Annex C.
Table
2.1
Summary of Activities Undertaken in the Reporting Period
|
Activities Undertaken in the Reporting Period |
|
·
Systems being operated – waste reception, pre-treatment, CAPCS extraction, the
digesters, the centrifuge, , the composting tunnels the desulphurisation, the
emergency flare, the CHPs, the ASP and the biological waste water treatment
plant (about 100-130 t/d SSOW input); ·
Process fine-tune – adjustment of the ASP operational parameters with new
treatment media, CEMS/SCADA modification and improvement work following
equipment failures and the alteration of different operation modes and
measures to adapt to the high variation of SSOW nature and sources; and ·
Construction of the Visitor Centre. |
2.4
Project Organisation and Management Structure
The
project organisation chart and contact details are shown in Annex D.
2.5
Status of Environmental Approval Documents
A
summary of the valid permits, licences, and/or notifications on environmental
protection for this Project is presented in Table 2.2.
Table 2.2
Summary of Environmental Licensing, Notification and Permit Status
|
Permit/
Licences/ Notification |
Reference |
Validity
Period |
Remarks |
|
Environmental
Permit |
FEP-01/395/2010/C |
Throughout the Contract |
Permit granted on 21 December 2015 |
|
Notification
of Construction Works under the Air Pollution Control (Construction Dust)
Regulation |
Ref No. 386715 |
Throughout the
Contract |
- |
|
Effluent
Discharge License |
WT00024352-2016 |
3 June 2016 –
30 June 2021 |
Approved on 3
June 2016 |
|
Construction
Noise Permit – P1&P2 |
GW-RW0538-18 (Superseded
CNP GW-RW0229-18) |
21 January
2019-20 July 2019 |
Approved on 31 December 2018 |
|
Chemical Waste
Producer Registration |
WPN
5213-961-O2231-01 |
Throughout the
Contract |
Approved on 29
April 2015 |
|
Chemical Waste Producer Registration |
WPN 5213-961-O2231-02 |
Throughout the implementation of the Project |
Approved on 10 November 2017 |
|
Waste Disposal
Billing Account |
Account
number: 702310 |
Throughout the
Contract |
- |
3
Environmental Monitoring and Audit Requirements
3.1
Environmental Monitoring
The
air quality (including odour) monitoring to be carried out during the
commissioning and operation phase of the Project are described below. No
monitoring for noise, waste, land contamination, hazard-to-life and landscape
and visual are required during construction and operation phases of the
Project. Although water quality monitoring is not required for the
construction and operation phases under the EM&A programme, there are water
quality monitoring requirement under the Water Discharge Licence of the plant
under the Water Pollution Control Ordinance (WPCO). As part of
this EM&A programme, the monitoring results will be reviewed to check the
compliance with the WPCO requirements.
3.1.1
Air Quality
According
to the EM&A Manual and EP requirements, stack monitoring are required
during the commissioning and operation phase of the Project.
On-line
monitoring (using continuous environmental monitoring system (CEMS) shall be
carried out for the centralised air pollution unit (CAPCS), cogeneration units
(CHP) and the ammonia stripping plant (ASP) during the commissioning and
operation phase. The calibration certificate for the on-line monitoring
equipment is provided in Annex E.
The
monitoring data is transmitted instantaneously to EPD (Regional Office) by
telemetry system.
When
the on-line monitoring for certain parameter cannot be undertaken, monitoring
will be carried out using the following methodology approved by the EPD.
Table 3.1
Sampling and Laboratory Analysis Methodology
|
Parameters |
Method |
Stacks to be
Monitored |
|
Gaseous and vaporous organic
substances (including methane) |
USEPA Method 18 |
·
CAPCS ·
CHP ·
ASP |
|
Particulate |
USEPA Method 5 |
·
CAPCS ·
CHP ·
ASP |
|
Carbon monoxide (CO) |
USEPA
Method 10 |
·
CHP ·
ASP |
|
Nitrogen oxides (NOx) |
USEPA Method 7E |
·
CHP ·
ASP |
|
Sulphur dioxide (SO2); |
USEPA Method 6 |
·
CHP ·
ASP |
|
Hydrogen chloride (HCl) |
USEPA Method 26A |
·
CHP ·
ASP |
|
Hydrogen fluoride (HF) |
USEPA Method 26A |
·
CHP ·
ASP |
|
Oxygen (O2); |
USEPA Method 3A |
·
CAPCS ·
CHP ·
ASP |
|
Velocity and Volumetric Flow |
USEPA Method 2 |
·
CAPCS ·
CHP ·
ASP |
|
Ammonia (NH3) |
USEPA
CTM 027 |
·
ASP |
|
Odour (including NH3
and H2S) |
EN
13725 |
·
CAPCS |
|
Water vapour content (continuous
measurement of the water vapour content should not be required if the sample
exhaust gas is dried before the emissions are analysed) |
USEPA
Method 4 |
·
CAPCS ·
CHP ·
ASP |
|
Temperature |
USEPA
Method 4 |
·
CAPCS ·
CHP ·
ASP |
With
reference to the EM&A Manual, the air emission of the stacks shall meet the
following emission limits as presented in Tables 3.2 to 3.5.
Table 3.2
Emission Limit for CAPCS Stack
|
Parameter |
Emission Level
(mg/Nm3) (a) |
|
VOCs (including
methane) |
680 |
|
Dust (or Total Suspended Particulates (TSP)) |
6 |
|
Odour (including NH3 & H2S) |
220 (b) |
|
Notes: (a)
Hourly average concentration (b)
The odour unit is OU/Nm3 |
|
Table 3.3
Emission Limit for CHP Stack
|
Parameter |
Maximum Emission
Level (mg/Nm3) (a) (b) |
|
Dust (or Total Suspended
Particulates) |
15 |
|
Carbon Monoxide |
650 |
|
NOx |
300 |
|
SO2 |
50 |
|
NMVOCs (c) |
150 |
|
VOCs
(including methane) (d) |
1,500 |
|
HCl |
10 |
|
HF |
1 |
|
Notes: (a)
All values refer to an oxygen content in the exhaust gas of 6% and dry basis. (b)
Hourly average concentration (c)
NMVOCs should be monitored by gas sampling and laboratory analysis at an
agreed interval. For the first 12 months (starting from August 2019),
monitoring should be carried out at quarterly intervals. The monitoring
frequency should then be reduced to half-yearly for next 12 months (starting
from August 2020). (d)
The VOCs emission limit include methane as biogas is adopted as fuel in the
combustion process. |
|
Table 3.4
Emission Limit for ASP Stack
|
Parameter |
Maximum Emission Level
(mg/Nm3) (a) (b) |
|
Dust (or Total Suspended Particulates) |
5 |
|
Carbon Monoxide |
100 |
|
NOx |
200 |
|
SO2 |
50 |
|
VOCs
(including methane) (c) |
20 |
|
NH3 |
35 |
|
HCl |
10 |
|
HF |
1 |
|
Notes: (a)
All values refer to an oxygen content in the exhaust gas of 11% and dry
basis. (b)
Hourly average concentration (c)
The VOCs emission limit include
methane as biogas is adopted as fuel in the combustion process. |
|
Table
3.5 Emission Limit for Standby Flaring
Gas Unit ([2])
|
Parameter |
Maximum Emission
level (mg/Nm3) (a) (b) |
|
Dust (or Total Suspended
Particulates) |
5 |
|
Carbon Monoxide |
100 |
|
NOx |
200 |
|
SO2 |
50 |
|
VOCs (including methane) (c) |
20 |
|
HCl |
10 |
|
HF |
1 |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 11% and dry basis. (b) Hourly
average concentration (c) The VOCs
emission limit include methane as biogas is adopted as fuel in the combustion
process. |
|
3.1.2
Odour
To determine the effectiveness of the proposed odour mitigation measures
and to ensure that the operation of the ORRC1 will not cause adverse odour
impacts, odour monitoring of the CAPCS stack (see Section 3.1.1) and
odour patrol will be carried out.
Odour
patrol shall be conducted by independent trained personnel/ competent persons
in summer months (i.e. from July to September) for the first two operational
years of ORRC1 at monthly intervals along an odour patrol route at the Project
Site boundary as shown in Annex A.
The
perceived odour intensity is divided into 5 levels. Table 3.6
describes the odour intensity for different levels.
Table 3.6
Odour Intensity Level
|
Level |
Odour Intensity |
|
0 |
Not detected. No odour perceived
or an odour so weak that it cannot be easily
characterised or described |
|
1 |
Slight identifiable odour,
and slight chance to have
odour nuisance |
|
2 |
Moderate identifiable
odour, and moderate chance to have odour nuisance |
|
3 |
Strong identifiable, likely
to have odour nuisance |
|
4 |
Extreme severe odour,
and unacceptable odour level |
Table
3.7 shows the action level and limit level to be used for
odour patrol. Should any exceedance of the action and limit levels occurs,
actions in accordance with the event and action plan in Table 3.8 should
be carried out.
Table
3.7
Action and Limit Levels for Odour Nuisance
|
Parameter |
Action Level |
Limit Level |
|
Odour Nuisance (from odour
patrol) |
When one documented compliant is
received (a), or Odour Intensity of 2 is measured from odour patrol. |
Two or
more documented complaints
are received (a) within a week; or Odour intensity of 3 or above is measured
from odour patrol. |
|
Note: (a)
Once the complaint is received by the Project Proponent (EPD), the Project
Proponent would investigate and verify the complaint whether it is related to
the potential odour emission from the ORRC1 and its on-site wastewater
treatment unit. |
||
Table
3.8
Event and Action Plan for Odour Monitoring
|
Event |
Action |
|
|
|
Person-in-charge of
Odour Monitoring |
Project Proponent (a) |
|
Action Level |
|
|
|
Exceedance of action level
(Odour Patrol) |
1. Identify source/reason of
exceedance; 2. Repeat odour patrol to
confirm finding. |
1. Carry out investigation to
identify the source/reason of exceedance. Investigation should
be completed within 2 weeks; 2. Rectify any unacceptable
practice; 3. Implement more mitigation
measures if necessary; 4. Inform Drainage Services
Department (DSD) or the operator of the Siu Ho Wan Sewage Treatment Works
(SHWSTW) if exceedance is considered to be caused by the operation of the
SHWSTW. 5. Inform North Lantau Refuse
Transfer Station (NLTS) operator if exceedance is considered to be caused by
the operation of NLTS. |
|
Exceedance of action level
(Odour Complaints) |
1. Identify source/reason of
exceedance; 2. Carry out odour patrol to
determinate odour intensity. |
1. Carry out investigation and
verify the complaint whether it is related to potential odour emission from
the nearby SHWSTW; 2. Carry out investigation to
identify the source/reason of exceedance. Investigation should be
completed within 2 weeks; 3. Rectify any unacceptable
practice; 4. Implement more mitigation
measures if necessary; 5. Inform DSD or the operator of
the SHWSTW if exceedance is considered to be caused by the operation of the
SHWSTW. 6. Inform NLTS operator if
exceedance is considered to be caused by the operation of NLTS. |
|
Limit Level |
|
|
|
Exceedance of limit level |
1. Identify source/reason of
exceedance; 2. Inform EPD; 3. Repeat odour patrol to
confirm findings; 4. Increase odour patrol
frequency to bi-weekly; 5. Assess effectiveness of
remedial action and keep EPD informed of the results; 6. If exceedance stops, cease
additional odour patrol. |
1. Carry out investigation to
identify the source/reason of exceedance. Investigation should be
completed within 2 week; 2. Rectify any unacceptable
practice; 3. Formulate remedial actions; 4. Ensure remedial actions
properly implemented; 5. If exceedance continues,
consider what more/enhanced mitigation measures should be implemented; 6. Inform DSD or the operator of
the SHWSTW if exceedance is considered to be caused by the operation of the
SHWSTW. |
|
Note: (a)
Project Proponent shall identify an implementation agent. |
||
3.2
Site Audit
Environmental
mitigation measures (related to air quality, water quality, waste, land contamination,
hazard-to-life, and landscape and visual) to be implemented during the
construction and operation phase of the Project are recommended in the approved
EIA Report and EM&A Manual and are summarised in Annex F.
Weekly site audits for construction phase and monthly site audits for operation
phase will be carried out to check the implementation of these measures.
3.2.1
Water Quality
Compliance
audits are to be undertaken to ensure that a valid discharge licence has been
issued by EPD prior to the discharge of effluent from the operation of the
Project site. The audit shall be conducted to ensure that the effluent
quality is in compliance with the discharge licence requirements. The
effluent quality shall meet the discharge limits as described in Table 3.9.
Table 3.9
Discharge Limits for Effluent
|
Parameters |
Discharge Limit
(mg/L) |
|
Flow Rate (m3/day) |
685 |
|
pH (pH units) |
6-10 (a) |
|
Suspended Solids |
800 |
|
Biochemical Oxygen Demand (5
days, 20°) |
800 |
|
Chemical Oxygen Demand |
2,000 |
|
Oil & Grease |
40 |
|
Total Nitrogen |
200 |
|
Total Phosphorus |
50 |
|
Surfactants (total) |
25 |
|
Note: (a) Range. |
|
3.2.2
Landscape and Visual
In
accordance with EM&A Manual, the landscape and visual mitigation measures
shall be implemented. Bi-weekly landscape and visual audit during the
construction phase is required to ensure that the design, implementation and
maintenance of landscape and visual mitigation measures recommended in the
approved EIA Report are fully achieved. The implementation status of the
mitigation measures for construction phase is summarised in Annex F.
For
operation phase, site inspection shall be conducted once a month for the first
year of operation of the Project. All measures as stated in the
implementation schedule of the EM&A Manual (see Annex F), including
compensatory planting, undertaken by both the Contractor and the specialist
Landscape Sub-Contractor during the first year of the operation phase shall be
audited by a Registered Landscape Architect (RLA) to ensure compliance with the
intended aims of the measures and the effectiveness of the mitigation measures.
4
Monitoring Results
4.1
Air Quality
4.1.1
Commissioning Phase Monitoring
Monitoring
results of air quality parameters from stack emissions of the centralised air
pollution control system, the ammonia stripping plant and the cogeneration
units will be provided once available to show compliance with the monitoring
requirements stated in the EM&A Manual (Rev. E) to support the termination
of the construction phase EM&A programme.
4.1.2
Operation Phase Monitoring
The
concentrations of concerned air pollutants emitted from the stacks of the
CAPCS, CHP, and ASP during the reporting period are monitored on-line by the
continuous environmental monitoring system (CEMS). During the reporting
period, there is no need to operate the standby flare and therefore no
monitoring of the flare stack was undertaken.
With
reference to the emission limits shown in Tables 3.2, 3.3 and 3.4,
the hourly average concentrations and the number of exceedances of the
concerned air emissions monitored for the CAPCS, CHP and ASP during this
reporting period are presented in Tables 4.1 to 4.5.
It
should be noted that measurements recorded under abnormal operating conditions,
e.g. start up and stopping of stacks, unstable operation, test runs and
interference of sensor, are disregarded.
Table 4.1
Hourly Average of Parameters Recorded for CAPCS
|
Parameter |
Range of Hourly
Average Conc. (mg/Nm3) |
Emission Limit
(mg/Nm3) |
Exceedance
Identified |
Remarks |
|
VOCs (including
methane) (a) |
0 – 378 |
680 |
Nil |
Nil |
|
Dust (or TSP) |
0 - 2 |
6 |
Nil |
Nil |
|
Odour (including NH3 & H2S) (b) |
0 – 184 |
220 |
Nil |
Nil |
|
Notes: (a)
Online monitoring was not available during the July and August 2019.
Alternative monitoring method as specified in the EM&A manual was used to
measure VOCs. The Contractor has arranged for replacement of the sensor
immediately. The sensor is expected to be delivered near the end of
September 2019. (b)
The odour unit is OU/Nm3. |
||||
Table 4.2
Hourly Average of Parameters Recorded for CHP 1
|
Parameter |
Range of Hourly
Average Conc. (mg/Nm3) (a) |
Max. Emission Limit
(mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 11 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 642 |
650 |
Nil |
Nil |
|
NOx |
0 – 294 |
300 |
Nil |
Nil |
|
SO2 |
0 – 50 |
50 |
Nil |
Nil |
|
NMVOCs (b) |
Not Available |
150 |
Nil |
Nil |
|
VOCs
(including methane) (c) |
0 – 1,267 |
1,500 |
Nil |
Nil |
|
HCl |
0 – 7 |
10 |
Nil |
Nil |
|
HF |
0 – 1 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 6% and
dry basis. (b) No sampling
was undertaken at CHP1 as biogas
production rate could not sustain the operation of the CHP stack for the
scheduled samplings.
(c) The VOCs
emission limit include methane as biogas is adopted as fuel in the combustion
process. |
||||
Table 4.3
Hourly Average of Parameters Recorded for CHP 2
|
Parameter |
Range of Hourly
Average Conc. (mg/Nm3) (a) (b) |
Max. Emission Limit
(mg/Nm3) |
Exceedance Identified |
Remarks |
|
Dust (or TSP) |
0 – 7 |
15 |
Nil |
Nil |
|
Carbon Monoxide |
0 – 543 |
650 |
Nil |
Nil |
|
NOx |
0 – 304 |
300 |
Identified (d) |
Supplier had been arranged to
check the performance of the CHP and maintenance will be arranged after
detailed investigation. |
|
SO2 |
0 – 77 |
50 |
Identified (e) |
Tripping of the desulphurisation
column. Continuous monitoring to reduce the duration of tripping. |
|
NMVOCs (b) |
5.2 – 5.7 |
150 |
Nil |
See Annex G for
laboratory results |
|
VOCs
(including methane) (c) |
0 – 1,539 |
1,500 |
Identified (f) |
CHP setting was fine-tuned for
performance optimisation. |
|
HCl |
0 – 6 |
10 |
Nil |
Nil |
|
HF |
0 – 0.8 |
1 |
Nil |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 6% and
dry basis. (b) Technical issue related to monitoring range of
methane sensors and the Contractor is solving the problem together with the
equipment suppliers. (c) The VOCs
emission limit include methane as biogas is adopted as fuel in the combustion
process. (d) One
exceedance on NOx was recorded on 15 July 2019. (e) Two
exceedances on SO2 was recorded on 25 July 2019. (f) One exceedances on VOC (including methane) was
identified on 17 June 2019. |
||||
Table 4.4
Hourly Average of Parameters Recorded for CHP 3
|
Parameter |
Range of Hourly
Average Conc. (mg/Nm3) (a) |
Max. Emission Limit
(mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 27 |
15 |
Identified (d) |
Supplier had been arranged to
check the performance of the CHP and maintenance will be arranged after
detailed investigation. |
|
Carbon Monoxide |
0 – 621 |
650 |
Nil |
Nil |
|
NOx |
0 – 1,293 |
300 |
Identified (e) |
Supplier had been arranged to
check the performance of the CHP and maintenance will be arranged after
detailed investigation. |
|
SO2 |
0 – 118 |
50 |
Identified (f) |
Tripping of the desulphurisation
column. Continuous monitoring to reduce the duration of tripping. |
|
NMVOCs (b) |
6.8 – 6.9 |
150 |
Nil |
See Annex G for
laboratory results |
|
VOCs
(including methane) (c) |
0 – 1,727 |
1,500 |
Identified (g) |
Supplier had been arranged to
check the performance of the CHP and maintenance will be arranged after
detailed investigation. |
|
HCl |
0 – 12 |
10 |
Identified (h) |
Nil |
|
HF |
0 – 1.9 |
1 |
Identified (i) |
Nil |
|
Notes: (a) All values refer to an oxygen content in the exhaust gas of 6% and
dry basis. (b) 2 sampling
was conducted from CHP3
during the reporting period. Result from the sampling conducted on 23
July 2019 and 6 August 2019 are provided in Annex G. (c) The VOCs emission limit include methane as biogas is
adopted as fuel in the combustion process. (d) One exceedance on Dust
(or TSP) was recorded on 29 August 2019. (e) Dates with
exceedances on NOx (number of exceedances on the day) were
identified on 28 (1) June 2019, 5 (1), 20 (13) July 2019, 2 (2), 4 (4), 5
(1), 22 (1), 23 (7), 24 (2), 30 (2) and 31 (1) August 2019. (f) Dates
with exceedances on SO2 (number of exceedances on the day) were
identified on 25 (9), 26 (13) July 2019, 6 (4), 22 (2), 30 (4) and 31 (18)
August 2019. (g) One exceedance on VOCs
(including methane) was recorded on 24 July 2019. (h) One exceedance on HCl
was recorded on 30 August2019. (i) One exceedance on HF
was recorded on 30 August 2019. |
||||
Table
4.5
Hourly Average of Parameters Recorded for ASP
|
Parameter |
Range
of Hourly Average Conc. (mg/Nm3) (a) |
Max. Emission Limit
(mg/Nm3) |
Exceedances Identified |
Remarks |
|
Dust (or TSP) |
0 – 5.7 |
5 |
Identified (c) |
Ongoing optimisation of ASP
combustion efficiency has been carried out. |
|
Carbon Monoxide |
0 – 110 |
100 |
Identified (d) |
Modification of the ASP is being
arranged with the supplier. The supplier will be on-site to complete the
modification and review the ASP operation. |
|
NOx |
0 – 703 |
200 |
Identified (e) |
Ongoing optimisation of ASP
combustion efficiency has been carried out. |
|
SO2 |
0 – 65 |
50 |
Identified (f) |
Tripping of the desulphurisation
column. Continuous monitoring to reduce the duration of tripping. |
|
VOCs
(including methane) (b) |
0 – 3,195 |
20 |
Identified (g) |
Ongoing optimisation of ASP
combustion efficiency has been carried out. |
|
NH3 |
0 – 1,016 |
35 |
Identified (h) |
Ongoing optimisation of ASP
combustion efficiency has been carried out. |
|
HCl |
0 – 9 |
10 |
Nil |
Nil |
|
HF |
0 – 1.0 |
1 |
Nil |
Nil |
|
Notes: (a) All values
refer to an oxygen content in the exhaust gas of 11% and dry basis. (b) The VOCs emission limit include methane as biogas is
adopted as fuel in the combustion process. (c) Dates with
exceedances on Dust (number of exceedances on the day) were identified on 10
(1), 25 (14) and 26 (2) June 2019. (d) 1 exceedance on CO (number of exceedances on the
day) was identified on 20 August 2019. (e) Dates with exceedances on NOx (number of
exceedances on the day) were identified on 2 (2), 5 (2), 6 (2), 12 (9), 13
(1), 14 (3), 15 (2), 20 (3), 21 (1), 24 (1), 25 (1) and 26 (1) June 2019, 3
(7), 4 (2), 6 (4), 14 (2), 15 (3) and 23 (3) July 2019, 1 (1), 2 (4), 3 (3),
4 (9), 5 (3), 6 (12), 7 (7), 8 (1), 11 (6), 16 (2) and 20 (1) August 2019. (f) Dates with exceedances on SO2 (number of
exceedances on the day) were identified on 25 (2) July 2019, 6 (1) and 20 (2) August 2019. (g) Dates with
exceedances on VOCs (including methane) (number of exceedances on the day)
were identified on 4 (1), 7 (1), 14 (1), 20 (2), 21 (4) and 29 (1) June 2019,
6 (3), 8 (2) and 20 (4) August 2019. (h) Dates with exceedances on NH3 (number of
exceedances on the day) were identified on 2 (9), 5 (7), 6 (11), 9 (3), 10
(5), 11 (4), 12 (11), 13 (1), 14 (12), 15 (4), 17 (1), 20 (9), 24 (3), 25
(4), 26 (12) and 27 (1) June 2019, 2 (4), 3 (10), 4 (11), 6 (6), 15 (2), 16
(9), 17 (1) and 25 (3) July 2019, 5 (11), 6 (8), 8 (3), 9 (5), 10 (16), 11
(9), 13 (12), 16 (2) and 20 (2) August 2019. |
||||
4.2
Odour
4.2.1
Commissioning Phase Monitoring
No odour patrol was required to be conducted for this
reporting period.
4.2.2
Operation Phase Monitoring
Odour
patrol was conducted by the independent odour patrol team of ALS Technichem
(HK) Pty Ltd on 19 & 23 July 2019 and 6 August 2019. According to the
EM&A Manual and EP requirements, it is considered an exceedance if the
odour intensity recorded by the panellists is Level 2 or above. During
this reporting period, no Level 2 Odour Intensity was recorded. The odour
patrol result is shown in Annex K.
4.3
Water Quality
4.3.1
Construction Phase Monitoring
No
effluent was discharged from the construction activity in the reporting month,
hence it was not necessary to carry out effluent discharge sampling for this
reporting period.
4.3.2
Operation Phase Monitoring
Effluent
discharge was sampled monthly from the Effluent Storage Tank as stipulated in
the operation phase discharge licence. The results of the discharge
sample is recorded in Table 4.6 to 4.8.
Table 4.6
Results of the Discharge Sample Collected on 27 June 2019
|
Parameters |
Discharged Effluent
Concentration (mg/L) |
Discharge Limit
(mg/L) |
Compliance with
Discharge Limit |
|
pH (pH units) |
7.06 – 8.70 |
6-10 (a) |
Yes |
|
Suspended Solids |
49 |
800 |
Yes |
|
Biochemical Oxygen Demand (5
days, 20°) |
12 |
800 |
Yes |
|
Chemical Oxygen Demand |
474 |
2,000 |
Yes |
|
Oil & Grease |
<5 |
40 |
Yes |
|
Total Nitrogen |
155 |
200 |
Yes |
|
Total Phosphorus |
20.7 |
50 |
Yes |
|
Surfactants (total) |
<1.0 |
25 |
Yes |
|
Notes: (a) Daily
Average. |
|||
Table 4.7
Results of the Discharge Sample Collected on 3 July 2019
|
Parameters |
Discharged Effluent
Concentration (mg/L) |
Discharge Limit
(mg/L) |
Compliance with
Discharge Limit |
|
pH (pH units) |
7.41 – 8.01 |
6-10 (a) |
Yes |
|
Suspended Solids |
240 |
800 |
Yes |
|
Biochemical Oxygen Demand (5
days, 20°) |
78 |
800 |
Yes |
|
Chemical Oxygen Demand |
754 |
2,000 |
Yes |
|
Oil & Grease |
<5 |
40 |
Yes |
|
Total Nitrogen |
157 |
200 |
Yes |
|
Total Phosphorus |
27.6 |
50 |
Yes |
|
Surfactants (total) |
3.1 |
25 |
Yes |
|
Notes: (a) Daily
Average. |
|||
Table 4.8
Results of the Discharge Sample on 24 August 2019
|
Parameters |
Discharged Effluent
Concentration (mg/L) |
Discharge Limit
(mg/L) |
Compliance with
Discharge Limit |
|
pH (pH units) |
6.05 – 9.51 |
6-10 (a) |
Yes |
|
Suspended Solids |
201 |
800 |
Yes |
|
Biochemical Oxygen Demand (5
days, 20°) |
111 |
800 |
Yes |
|
Chemical Oxygen Demand |
816 |
2,000 |
Yes |
|
Oil & Grease |
<5 |
40 |
Yes |
|
Total Nitrogen |
49.4 |
200 |
Yes |
|
Total Phosphorus |
24.4 |
50 |
Yes |
|
Surfactants (total) |
<1.0 |
25 |
Yes |
|
Notes: (a) Daily
Average. |
|||
No
exceedance of discharge limit was recorded during the reporting period.
4.4
Waste Management
4.4.1
Construction Phase Monitoring
Wastes
generated from this Project include inert construction and demolition (C&D)
materials (public fill) and non-inert C&D materials (construction
waste). Construction waste comprises general refuse, metals and
paper/cardboard packaging materials. Metals generated from the
construction of the Project are also grouped into construction waste as the
materials were not disposed of with others at public fill. Reference has
been made to the Monthly Summary Waste Flow Table prepared by the Contractor
(see Annex H).
With reference to the relevant handling records and trip tickets of this
Project, the quantities of different types of waste generated in the reporting
month are summarised in Table 4.9.
Table 4.9
Quantities of Waste Generated from the Construction of the Project
|
Month / Year |
Quantity |
|||
|
|
Total Inert C&D Materials Generated (a) |
Non-inert C&D Materials (b) |
||
|
C&D Materials Recycled (c) |
C&D Waste Disposed of at Landfill (d)
|
Chemical Waste |
||
|
June 2019 |
0.00 tonnes |
0.00 kg |
11.45 tonnes |
0.00 L |
|
July 2019 |
15.57 tonnes |
0.00 kg |
0.00 tonnes |
0.00 L |
|
August 2019 |
15.19 tonnes |
0.00 kg |
9.73 tonnes |
0.00 L |
|
Notes: (a) Inert
C&D materials (public fill) include bricks, concrete, building debris,
rubble and excavated spoil. In total, 30.76 tonnes of inert C&D
material were generated from the Project. The detailed waste flow is
presented in Annex
H. (b) Non-inert C&D
materials (construction wastes) include metals, paper / cardboard packaging
waste, plastics and other wastes such as general refuse. Metals
generated from the Project were grouped into construction wastes as the
materials were not disposed of with others at the public fill. (c) 0.00 kg of
metals, 0.00 kg of papers/ cardboard packing and 0.00 kg of plastics were
sent to recyclers for recycling during the reporting period. (d) Construction
wastes other than metals, paper/cardboard packaging, plastics and chemicals
were disposed of at NENT Landfill by subcontractors. |
||||
4.4.2
Operation Phase Monitoring
Wastes
generated from the operation of the Project include chemical waste, wastes
generated from pre-treatment process and general refuse ([3]).
Reference has been made to the Monthly Summary Waste Flow Table prepared by the
Contractor (see Annex
H). With reference to the relevant handling records and trip
tickets of this Project, the quantities of different types of waste generated from
the operation of the Project in the reporting month are summarised in Table
4.10.
Table 4.10
Quantities of Waste Generated from the Operation of the Project
|
Month / Year |
Chemical Waste |
Waste Generated from |
General Refuse |
||
|
|
Disposal of at CWTC |
Disposed of at Landfill (a) |
Recycled (b) |
Disposed of at Landfill (a) (d) |
Recycled (c) |
|
June 2019 |
0 L |
459.23 tonnes |
0.00 tonnes |
2.76 tonnes (d) |
0 kg |
|
July 2019 |
0 L |
521.79 tonnes |
0.00 tonnes |
3.00 tonnes (d) |
0 kg |
|
August 2019 |
40 L |
441.05 tonnes |
0.00 tonnes |
3.11 tonnes (d) |
0 kg |
|
Notes: (a)
Waste generated from pre-treatment process and general refuse other than
chemical waste and recyclables were disposed of at NENT landfill by
sub-contractors. (b)
Among waste generated from pre-treatment process, 0.00 kg of metals, 0.00 kg
of papers/ cardboard packing and 0.00 kg of plastics were sent to recyclers
for recycling during the reporting period. (c)
Among general refuse, 0.00 kg of metals, 0.00 kg of papers/ cardboard packing
and 0 kg of plastics were sent to recyclers for recycling during the
reporting period. (d)
It was assumed that four 240-litre bins filled with 80% of general refuse
were collected at each collection. The general refuse density was assumed
to be around 0.15 kg/L. |
|||||
5
Site Audit
5.1
Environmental Site Audit
5.1.1
Construction Phase
Ten construction phase site inspections were conducted during the reporting
period. The inspections checked the implementation of the recommended
mitigation measures for air quality, landscape and visual, water quality, waste
(land contamination) and hazard-to-life stated in the Implementation Schedule
(see Annex F).
Follow-up actions resulting from site inspections were generally taken
as reported by the Contractor. The Contractor has implemented
environmental mitigation measures recommended in the approved EIA Report and
EM&A Manual.
June 2019
Joint site inspections were conducted by representatives of the
Contractor and the ET on 5, 14, 21 and 28 June 2019 as required for the
construction of the Project. The IEC was present at the joint inspection
on 28 June 2019.
July 2019
Joint site inspections were conducted by representatives of the
Contractor and the ET on 3, 10, 18, 26 and 31 July 2019 as required for the
construction of the Project. The IEC was present at the joint inspection
on 26 July 2019.
August 2019
Joint site inspections were conducted by representatives of the
Contractor and the ET on 9, 14, 21 and 29 August 2019 as required for the
construction of the Project. The IEC and ER were present at the joint
inspection on 14 August 2019.
5.1.2
Operation Phase
The monthly inspections of the landscape and visual mitigation measures
for the operation phase of the Project covered the operation phase
environmental site inspections. The inspections checked the implementation
of the recommended mitigation measures for air quality, landscape and visual,
water quality, waste (land contamination) and hazard-to-life stated in the
Implementation Schedule (see Annex F).
Follow-up actions resulting from the site inspections were generally
taken as reported by the Contractor. The Contractor has implemented
environmental mitigation measures recommended in the approved EIA Report and
EM&A Manual.
June 2019
The monthly inspection of the landscape and visual mitigation measures
for the operation phase of the Project on 28 June 2019 covered the operation
phase environmental site audit. Joint site inspections was conducted by
representatives of the Contractor, IEC and the MT on 28 June 2019 as required
for the operation of the Project.
July 2019
The monthly inspection of the landscape and visual mitigation measures
for the operation phase of the Project on 26 July 2019 covered the operation
phase environmental site audit. Joint site inspections was conducted by
representatives of the Contractor, ER, IEC and the MT on 26 July 2019 as
required for the operation of the Project.
August 2019
The monthly inspection of the landscape and visual mitigation measures
for the operation phase of the Project on 14 August 2019 covered the operation
phase environmental site audit. Joint site inspections was conducted by
representatives of the Contractor, ER, IEC and the MT on 14 August 2019 as
required for the operation of the Project.
5.2
Landscape and Visual Audit
It
was confirmed that the necessary landscape and visual mitigation measures
during the construction and operation phase as summarised in Annex F were
generally implemented by the Contractor. No non-compliance in relation to
the landscape and visual mitigation measures was identified during the site
audits in this reporting period and therefore no further actions are
required. The ET/MT will keep track of the EM&A programme to check
compliance with environmental requirements and the proper implementation of all
necessary mitigation measures.
June 2019
Inspection of the landscape and visual mitigation
measures for the construction phase of the Project was performed on 14 and 28
June 2019. Inspection of the landscape and visual mitigation measures for
the operation phase of the Project was performed on 28 June 2019.
July 2019
Inspection of the landscape and visual mitigation
measures for the construction phase of the Project was performed on 10 and 26
July 2019. Inspection of the landscape and visual mitigation measures for
the operation phase of the Project was performed on 26 July 2019.
August 2019
Inspection of the landscape and visual mitigation
measures for the construction phase of the Project was performed on 14 and 29
August 2019. Inspection of the landscape and visual mitigation measures
for the operation phase of the Project was performed on 14 August 2019.
6
Environmental Non-conformance
6.1
Summary of Environmental Non-Compliance
June
2019
Non-compliance
of emission limits for CHP and ASP were recorded during the reporting
period.
The
Contractor has reviewed the organic waste treatment processes (i.e. waste
reception, waste pre-treatment, anaerobic digesters, and composting processes)
and found that they were operated normally during the reporting period.
The Contractor has investigated air pollution control systems combustion system
for the CHP and the ASP and identified several potential causes for the
exceedance. Remedial and follow-up actions had been completed by the
Contractor. The Investigation Report is show in Annex J.
The
Contractor reported that an incident related to the release of biogas occurred
on 24 June 2019. The investigation report and the extract of the incident
report provided by the Contractor are presented in Annex J.
July
2019
Non-compliance
of emission limits for CHP and ASP were recorded during the reporting
period.
The
Contractor has reviewed the organic waste treatment processes (i.e. waste
reception, waste pre-treatment, anaerobic digesters, and composting processes)
and found that they were operated normally during the reporting period.
The Contractor has investigated air pollution control systems combustion system
for the CHP and the ASP and identified several potential causes for the
exceedance. Remedial and follow-up actions had been completed by the
Contractor. The Investigation Report is show in Annex J.
August
2019
Non-compliance
of emission limits for CHP and ASP were recorded during the reporting
period.
The
Contractor has reviewed the organic waste treatment processes (i.e. waste
reception, waste pre-treatment, anaerobic digesters, and composting processes)
and found that they were operated normally during the reporting period.
The Contractor has investigated air pollution control systems of the CHP and
ASP and the combustion system for the CHP and the ASP and identified several
potential causes for the exceedance. Remedial and follow-up actions had
been completed by the Contractor. The Investigation Report is show in Annex J.
The
Contractor reported that an incident related to the release of biogas occurred
on 25 August 2019. The investigation report and the extract of the incident
report provided by the Contractor are presented in Annex J.
6.2
Summary of Environmental Complaint
No complaint was received during the reporting period.
6.3
Summary of Environmental Summon and Successful Prosecution
No summon/prosecution was received during the
reporting period. The cumulative summons/prosecution log is shown in Annex I.
7
Future Key Issues
7.1
Key Issues for the Coming Month
Activities
to be undertaken for the coming reporting period are:
·
Operation of the Project.
·
Implementation of measures to further rectify the abnormal operating conditions
for the CHP and ASP.
·
Continue construction of the Visitor Centre.
·
Visitor Centre BS works (MVAC, FS, P/D).
8
Conclusions
This
EM&A Report presents the EM&A programme undertaken during the reporting
period from 1 June 2019 to 31 August 2019 in accordance with
EM&A Manual (Version E) and requirements of EP (FEP-01/395/2010/C).
No
air quality, noise and water quality monitoring is required under the
construction and commissioning EM&A requirements.
For
the operation phase, exceedances of the emission limits for stack monitoring
(including CHP and ASP stacks) were recorded under normal operating conditions
during the reporting period (see Table 8.1).
Table 8.1 Exceedances
for Stack Emissions
|
Stack |
Exceedances During
the Reporting Period |
|
Cogeneration Unit (CHP) |
·
Exceeded emission limit of Dust (or TSP) on 29 August 2019 ·
Exceeded emission limit of NOx on 28 June 2019, 5, 20 and 15 July
2019, 2, 4, 5, 22, 23, 24, 30 and 31 August 2019 ·
Exceeded emission limit of SO2 on 25 and 26 July 2019, 6, 22, 30
and 31 August 2019 ·
Exceeded emission limit of VOCs (including methane) on 17 June 2019, 24 July
2019 ·
Exceeded emission limit of HCl on 30 August 2019 ·
Exceeded emission limit of HF on 30 August 2019 |
|
Ammonia Stripping Plant (ASP) |
·
Exceeded emission limit of Dust on 10, 25 and 26 June 2019 ·
Exceeded emission limit of CO on 20 August 2019 ·
Exceeded emission limit of NOx on 2, 5, 6, 12, 13, 14, 15, 20, 21,
24, 25 and 26 June 2019, 3, 4, 6, 14, 15 and 23 July 2019, 1, 2, 3, 4, 5, 6,
7, 8, 11, 16 and 20 August 2019 ·
Exceeded emission limit of SO2 on 25 July 2019, 6 and 20 August
2019 ·
Exceeded emission limit of VOCs on 4, 7, 14, 20, 21 and 29 June 2019, 6, 8
and 20 August 2019 ·
Exceeded emission limit of NH3 on 2, 5, 6, 9 to 15, 17, 20 and 24
to 27 June 2019, 2, 3, 4, 6, 15, 16, 17 and 25 July 2019, 5, 6, 8, 9, 10, 11,
13, 16 and 20 August 2019 |
Exceedances
in emission parameters of CHP and ASP were found to be a result of problems
with the incomplete desulphurisation of biogas which fed to the CHPs, and the
incomplete thermal combustion of the thermal combustion unit of the ASP.
The
Contractor has implemented mitigation measures to control the exceedance
(including the adding additional activated carbon filters to the biogas
desulphurisation system to control the H2S level in the biogas which
fed to the CHP and the ASP; and tuning the thermal combustion unit of the ASP
to optimise combustion efficiency and overall performance).
Odour
patrol was conducted in accordance to the EM&A requirements. No
exceedance of odour intensity limit for the odour patrol.
No
non-compliance to the effluent discharge limit was recorded during this
reporting period.
The
environmental control /mitigation measures related to air quality, water
quality, waste (including land contamination prevention), hazard-to-life and
landscape and visual recommended in the approved EIA Report and the EM&A
Manual were properly implemented by the Contractor during the reporting
period.
Bi-weekly
landscape and visual monitoring were conducted in the reporting period.
The necessary landscape and visual mitigation measures recommended in the
approved EIA Report were generally implemented by the Contractor.
Incidents
related to the release of biogas occurred on 18 June 2019 and 25 August
2019. The incidents have been resolved.
No
complaint/summon/prosecution was received.
([1])
As some of the minor items are yet to be closed out in March 2019,
the construction phase EM&A programme and Operation Phase EM&A
programme were undertaking in parallel in
March 2019.
([2])
A standby facility. Only operate when the CHPs are not
in operation or when the biogas generated exceeded the utilisation rate of the
CHPs.