Content

 

Chapter    Title                                                                                                                           Page

1.1              Purpose of the Manual 1

1.2              Review of the EM&A Manual 1

1.3              Background_ 1

1.4              Site Location_ 2

1.5              Sensitive Receivers_ 2

1.6              Environmental Monitoring and Audit Requirements_ 3

1.7              Project Organisation_ 5

1.8              Construction Programme_ 6

2.1              Construction Phase_ 7

2.2              Operation Phase_ 21

3.1              Introduction_ 23

3.2              Audit Requirements_ 23

3.3              Mitigation Measures_ 23

4.1              Construction Phase_ 26

4.2              Operation Phase_ 26

5.1              Construction Phase_ 27

5.2              Operation Phase_ 27

6.1              Construction Phase_ 28

6.2              Operation Phase_ 28

7.1              Introduction_ 29

7.2              Mitigation Measures_ 29

7.3              Construction and Operation Phase Audit 29

8.1              Construction Phase_ 30

8.2              Operation Phase_ 30

9.1              Construction Phase_ 31

9.2              Operation Phase_ 31

10.1            Construction Phase_ 32

10.2            Operation Phase_ 32

11.1            Introduction_ 33

11.2            Compliance with Legal and Contractual Requirements_ 33

11.3            Environmental Complaints_ 34

12.1            General 35

12.2            Electronic Reporting_ 35

12.3            Baseline Monitoring Report 35

12.4            EM&A Reports_ 36

12.5            Data Keeping_ 41

12.6            Interim Notifications of Environmental Quality Limit Exceedances_ 41

 

Tables

Table 2.1__ Water Quality Monitoring Stations_ 11

Table 2.2__ Water Quality Monitoring Parameters_ 13

Table 2.3__ Typical Action and Limit Levels for Water Quality 14

Table 2.4__ Typical Event and Action Plan for Water Quality for Construction Phase_ 15

Table 2.5__ 24 Hours Water Quality Monitoring Stations_ 17

Table 2.6__ Typical Event and Action Plan for 24 Hours Water Quality Monitoring_ 19

Table 2.7__ Water Quality Monitoring Stations for parameters other than NH3-N during Maintenance Dredging_ 21

Table 2.8__ Water Quality Monitoring Stations for NH3-N during Maintenance Dredging_ 21

 

 

List of Figures

Figure 1.1      Project Layout

Figure 1.2a   Location of Water Sensitive Receivers

Figure 1.2b   Zone of Visual Influence and VSRs

Figure 1.2c    Location of Representative Noise Sensitive Receivers

Figure 1.2d   Location of Representative Air Sensitive Receivers

Figure 1.2e   Schematic Diagram of Silt Curtain with Grab Dredger

Figure 1.2f     Working Zones of Different Scenarios

Figure 1.2g   Working Zones of Different Scenarios

Figure 1.2h   Zones and Subzones of Dredging Plan Layout

Figure 1.3      Project Organisation and Lines of Communication

Figure 1.4      Dredging Programme

Figure 2.1      Proposed Location of Water Quality Monitoring Stations

Figure 11.1   Complaint Response Procedures

 

List of Annexes

Annex A          Environmental Mitigation Implementation Schedule

Annex B         Sample Environmental Monitoring Data Recording Sheets

Annex C         Complaint Log

Annex D         Sample Interim Notification of Environmental Quality Limit Exceedances

1.1               Purpose of the Manual

The purpose of this Environmental Monitoring and Audit (EM&A) Manual (hereafter referred to as the Manual) is to guide the setup of an EM&A programme to ensure compliance with the Environmental Impact Assessment (EIA) study recommendations, to assess the effectiveness of the recommended mitigation measures and to identify any further need for additional mitigation measures or remedial action. This Manual outlines the monitoring and audit programme proposed for the “Dredging Works in Kwai Tsing Container Basin and its Approach Channel – Investigation, Design and Construction” (The Project).

Environmental regulations for water quality, waste management, ecology, fisheries, hazard to life, landscape and visual resources, heritage protection, noise and air quality, the Hong Kong Planning Standards and Guidelines and recommendations in the EIA Report have served as guidance documents in the preparation of this Manual. This EM&A Manual fulfils the requirements of the Study Agreement and follows the approach recommended in EPD’s Generic EM&A Manual, Annex 21 of the Technical Memorandum on the EIA Process and EM&A Guidelines for Development Projects in Hong Kong. The contractor should follow this EM&A Manual and the EPD Guidelines for Development Projects in Hong Kong when they perform the environmental monitoring for this Project.

For the purpose of this Manual, the "Engineer" should refer to the Engineer as defined in the Contract and the Engineer's Representative (ER), in cases where the Engineer's powers have been delegated to the ER, in accordance with the Contract. The Environmental Team (ET) Leader, who should be responsible for and in charge of the ET, should refer to the person delegated the role of executing the environmental monitoring and audit requirements.

1.2               Review of the EM&A Manual

It should be noted that this EM&A Manual is subject to changes. The Manual shall be reviewed and updated later, where necessary, nearer the time of the commencement of construction of the Project.

1.3               Background

Mott MacDonald Hong Kong Ltd. was commissioned by Civil Engineering and Development Department (CEDD) to carry out the Environmental Impact Assessment for the proposed Project.

The main objective of the Project is to dredge approximately 4.4 million cubic metres of sediment from the seabed of Kwai Tsing Container Basin, as well as portions of Northern Fairway and Western Fairway to provide sufficient depth of container basin and approach channel to Kwai Tsing Container Terminal (KTCT) for the safe navigation of the Ultra Large Container Ships (ULCS) as confirmed through the Engineering Assessment for this Project. This is a reduction of more than 1 Mm3 of sediment quantity compared with the EIA Study Brief.

The Project is a designated project under item C.12 of Schedule 2 of the Environmental Impact Assessment Ordinance (EIAO), which encompasses ‘a dredging operation exceeding 500 000 m3 or a dredging operation which

a.         is less than 500m from the nearest boundary of an existing or planned

i.                Site of special scientific interest;

ii.              Site of cultural heritage;

iii.             Bathing beach;

iv.             Marine park or marine reserve;

v.              Fish culture zone;

vi.             Wild animal protection area;

vii.           Coastal protection area; or

viii.          Conservation area; or

b.        Is less than 100m from a seawater intake point.”

An application (No. ESB-198/2008) for an Environmental Impact Assessment (EIA) study brief under section 5(1)(a) of the EIAO was submitted by the Civil Engineering and Development Department (CEDD) on 22 October 2008 with a project profile (No. PP-369/2008). An EIA Study Brief (No. ESB-198/2008) was issued by EPD on 4 December 2008 for carrying out the EIA.

From the EIA, the recommendations for monitoring contained herein, are made.

1.4               Site Location

The proposed Project involves deepening the seabed level of KTCB and portions of Northern Fairway and Western Fairway from the existing average of about -16.0 mCD to a depth of at least -17.5 mCD to ensure adequate depth of water for the new generation of the ULCSs. The Project layout is shown in Figure 1.1.

1.5               Sensitive Receivers

Sensitive receivers have been identified in the EIA and are shown on Figures 1.2a-d.  Representative Sensitive Receivers (SRs) for water quality, marine ecology, noise, air quality and fisheries are selected according to the criteria set out in the Technical Memorandum on Environmental Impact Assessment Ordinance (EIAO-TM) and listed as follows:

¡      Gazetted Beaches (WSRs);

¡      WSD Flushing Water Intakes (WSRs);

¡      Cooling Water Intakes (WSRs);

¡      Corals (WSRs and Marine Ecological Sensitive Receivers);

¡      Fish Culture Zones (WSRs and Fisheries);

¡      Inter-tidal Communities (Marine Ecological Sensitive Receivers);

¡      Benthic Communities (Marine Ecological Sensitive Receivers);

¡      Marine Mammals (Marine Ecological Sensitive Receivers);

¡      Ha Kwai Chung Residential Area, Kwai Chung Container Terminals, Tsuen Wan Urban Fringe, Route 8, West Kowloon Urban Fringe, Kennedy Town, Victoria Road, Pok Fu Lam, North Lamma, Peng Chau, Discovery Bay, Disney Land, Ma Wan, Terminal 9, Tsing Yi Residential Area (Visual Sensitive Receivers)

¡      Ching Pak House, Ching Chung House, Ching Tao House, Ching Kwai House, Ching Wai House, Ching Yung House of Cheung Ching Estate (NSRs and ASRs); and

¡      Hutchison Logistic Centre, Asia Terminal Limited Logistics Centre Block A, Asia Terminal Limited Logistics Centre Block B, Mariners’ Club, Modern Terminal Limited Building, Tsing Yi Industrial Centre Phase 2 Building, Cheung Ching Shopping Centre, Hong Kong International Terminal Office Building, Rambler Garden Hotel, Mexan Harbour Hotel, Rambler Oasis Hotel, Rambler Crest Tower 1, Rambler Crest Tower 2, Rambler Crest Tower 3, Rambler Crest Tower 5, Rambler Crest Tower 6, Rambler Crest Shopping Arcade and Terminal No. 9 Office Building (ASRs).

1.6               Environmental Monitoring and Audit Requirements

The EPD Guidelines for Development Projects in Hong Kong should be followed when performing the environmental monitoring for this Project. The EIA study identified the likely environmental impacts during construction and operation phases. These impacts can be minimised to acceptable levels with the implementation of environmental mitigation measures and environmental monitoring and audit requirements.  An Implementation Schedule of the Environmental Mitigation Measures recommended in the EIA Report is described in Annex A.  To ensure the environmental acceptability of the proposed Project, monitoring and audit requirements have been identified and are described in detail in the subsequent sections. A summary of the EM&A requirements for different environmental aspects studied in the EIA is provided below:

1.6.1           Water Quality

Appropriate mitigation measures are recommended to reduce potential water quality impacts during the construction phase. Water quality monitoring and audit is required to obtain a robust, defensible database of baseline and ambient information for water quality before and during construction phase. The intention is to monitor baseline conditions, variation in water quality and exceedances of WQOs at sensitive receivers during construction. Subsequently, it helps to ensure recommended mitigation measures are implemented properly.

1.6.2           Waste Management

It will be the Contractor’s responsibility to ensure that all wastes produced during the construction of the Project are handled, stored and disposed of in accordance with good waste management practices and EPD’s regulations and requirements. The recommended mitigation measures shall form the basis of the site Waste Management Plan to be developed by the Contractor in the construction phase.

During construction, auditing of each waste stream shall be carried out periodically to determine if wastes are being managed in accordance with approved procedures and the site Waste Management Plan. The audits shall look at all aspects of waste management including waste generation, storage, recycling, treatment, transport and disposal. An appropriate audit programme shall be formulated and undertaken at the commencement of construction works, and implement regularly thereafter.

1.6.3           Marine Ecology

During construction phase, water quality monitoring shall be carried out at sensitive receivers (including some marine ecological sensitive receivers). The water quality monitoring programme is to monitor any potential impact to the marine ecology induced by deterioration of water quality and allow quick action to be responded in accordance with the action plan included at the earliest stage to alleviate the situation. No other marine ecology-specific monitoring programme is considered necessary.

1.6.4           Fisheries

The implementation of the water quality mitigation measures stated in Section 2 of this Environmental Monitoring and Audit Manual shall be checked as part of the environmental monitoring and audit procedures during the construction phase. No other fisheries-specific measures are considered necessary.

1.6.5           Hazard to Life

In spite of the negligible additional risk, mitigation measures are recommended to further reduce the risks to be as low as reasonably practicable.

A sound communication channel shall be established with the oil companies, Marine Department, and Fire Services Department for effective notification and emergency evacuation in case of accidents.

Proper safety and emergency training shall be given to the relevant staff involved in the dredging operations.  Emergency plans and procedures shall be prepared and drills shall be performed periodically.

1.6.6           Landscape, Visual and Glare

The proposed Project activities are not expected to cause any landscape, visual and glare impacts. An Environmental monitoring and audit (EM&A) programme is recommended in terms of regular site audit to ensure the proper implementation of mitigation measures.

1.6.7           Cultural Heritage

None of the unidentified sonar contacts are within the Western Fairway which therefore has no archaeological potential and no further action is required in this area.

The Container Basin and Northern Fairway has low archaeological potential but there are 20 unidentified sonar contacts.  The archaeological potential of the sonar contacts is very low due to the extent of previous dredging across the whole area. 

It is recommended that a monitoring brief shall be conducted during the dredging works.  This will only be required during dredging at the locations of the 20 unidentified sonar contacts and masked areas and does not need to cover all of the dredging activities. A marine archaeologist shall be present to monitor the dredged spoil and provide advice. Dredging staff shall be briefed about the possibility of locating archaeological objects. If materials indicative of archaeological remains is retrieved, the AMO should be contacted as soon as possible.

1.6.8           Noise

Based on the Project arrangement and assessment findings, noise nuisance is insignificant and noise monitoring is considered not necessary. However, if any planned NSRs within 300 m from the works area are occupied during the dredging period, noise monitoring programme shall be implemented during the period(s) with predicted occurrence of noisy activities.

1.6.9           Construction Air Quality

As the predicted air quality nuisance associated with the Project is not significant, air quality monitoring during construction phase is not recommended.  Regular site audits shall be conducted to ensure compliance with the relevant requirements of the Air Pollution Control (Construction Dust) Regulation.

1.7               Project Organisation

The proposed project organisation is shown in Figure 1.3.  The responsibilities of respective parties are:

Civil Engineering and Development Department

¡      project proponent and will assume overall responsibility for the project; and

¡      liaise with EPD on environmental issues associated with the project with IEC’s advices.

Environmental Protection Department

¡      statutory enforcement body for environmental protection matters in Hong Kong.

The Contractor

¡      provide assistance to ET in carrying out monitoring;

¡      submit proposals on mitigation measures in case of exceedances of Action and Limit levels in accordance with the Event and Action Plans;

¡      implement measures to reduce impact where Action and Limit levels are exceeded; and

¡      adhere to the procedures for carrying out complaint investigation in accordance with Section 11.3.

The Engineer or Engineer Representative (ER)

¡      to be employed by project proponent

¡      supervise the Contractor’s activities and ensure that the requirements in the Manual are fully complied with;

¡      inform the Contractor when action is required to reduce impacts in accordance with the Event and Action Plans; and

¡      adhere to the procedures for carrying out complaint investigation in accordance with Section 11.3.

The Environmental Team (ET)

¡      to be employed by project proponent / contractor to carry out EM&A works;

¡      monitor the various environmental parameters as required in the Manual;

¡      analyse the EM&A data and review the success of EM&A programme to cost effectively confirm the adequacy of mitigation measures implemented and the validity of the EIA predictions and to identify any adverse environmental impacts arising;

¡      carry out site inspections to investigate and audit the Contractor’s site practice, equipment and work methodologies with respect to pollution control and environmental mitigation, and anticipate environmental issues for proactive action before problems arise;

¡      audit and prepare audit reports on the environmental monitoring data and the site environmental conditions;

¡      report on the EM&A results to the IEC, Contractor, the ER, and the EPD;

¡      recommend suitable mitigation measures to the Contractor in the case of exceedance of Action and Limit levels in accordance with the Event and Action Plans; and

¡      adhere to the procedures for carrying out complaint investigation in accordance with Section 11.3.

The ET Leader shall have relevant professional qualifications and at least 7 years of experience in environmental monitoring and audit (EM&A) or environmental management subject to approval of the ER and the Environmental Protection Department (EPD).

Independent Environmental Checker (IEC)

¡      to be employed by project proponent / engineer to audit the results of the EM&A works carried out by the ET;

¡      check, review, verify the EM&A works performed by the ET;

¡      audit the monitoring activities and results;

¡      evaluate the EM&A reports submitted by the ET;

¡      review the proposals for mitigation measures submitted by the Contractor in accordance with the Event and Action Plans; and

¡      adhere to the procedures for carrying out complaint investigation in accordance with Section 11.3.

The IEC shall have relevant professional qualifications and at least 7 years of experience in environmental monitoring and audit (EM&A) or environmental management subject to approval of the ER and the EPD.

Sufficient and suitably qualified professional and technical staff shall be employed by the respective parties to ensure full compliance with their duties and responsibility, as required under the EM&A programme for the duration of the project. The ET shall not be in any way an associated body of the Contractor and the IEC. The IEC shall not be in any way an associated body of the Contractor or the ET.

1.8               Construction Programme

According to the latest estimate, the Project (as shown in Figure 1.4) is tentatively scheduled to commence works in the second half of 2011, to be substantially completed with 2 years except for a small area near Container Terminal no. 1 and 5.


2.1               Construction Phase

2.1.1           Introduction

As identified in the EIA Report, dredging has the potential to generate water quality impacts during construction. Marine water quality monitoring shall be carried out during the dredging works to ensure that any unacceptable increase in suspended solids/turbidity and decrease in dissolved oxygen due to dredging works are readily detected and timely action be taken to rectify the situation. In addition to dredging, in order to ensure that the hydraulic performance of the Tsing Yi Submarine Sewage Outfall will not be adversely affected due to the proposed dredging and outfall modification works, hydraulic performance measurement is proposed to be conducted before, during and after the proposed modification works. Details are provided in Section 2.1.12.

2.1.2           Water Quality Parameters

Monitoring of Dissolved Oxygen (DO), Dissolved Oxygen Saturation (DO%), pH, temperature, turbidity, salinity, suspended solid (SS), ammoniacal nitrogen (NH3-N), unionized ammonia (UIA) (derived from NH3-N), 5-day biochemical oxygen demand (BOD5), synthetic detergents (at WSD Flushing Water Intakes only), E. coli and water depth should be undertaken at designated monitoring locations. All parameters should be measured in-situ whereas SS, NH3-N, BOD5 , synthetic detergents and E. coli should be determined by the laboratory. DO should be presented in mg/L and in % saturation. For NH3-N both in-situ and laboratory measurement shall be carried out. For unionized ammonia (UIA), it shall be calculated from NH3-N either determined by the laboratory or measured in-situ together with in-situ measurement of temperature, pH and salinity. 

Other relevant data shall also be recorded, including monitoring location / position, time, tidal stages, weather conditions and any special phenomena or work underway at the construction site.

2.1.3           Sampling Procedures and Monitoring Equipment

(N.B. Water samples for all monitoring parameters shall be collected, stored, preserved and analysed according to Standard Methods, APHA 21st ed. and/or methods agreed by the Director of Environmental Protection. In-situ measurements at monitoring locations including DO, pH, temperature, turbidity, salinity and water depth shall be collected by equipment with the characteristics and functions listed in the following sections).

The following equipment and facilities shall be provided by the ET and used for the monitoring of water quality impacts:

2.1.3.1         Dissolved Oxygen, pH and Temperature Measuring Equipment

DO, pH and water temperature shall be measured in-situ by a DO/pH/temperature meter. The instrument shall be portable, battery operated and weatherproof. It shall have a membrane electrode with automatic temperature compensation complete with a cable. The equipment should be capable of measuring:

¡      a DO level in the range of 0-20 mg/L and 0-200% saturation; and

¡      a temperature of between 0 and 45 degree Celsius.

¡      a portable pH meter capable of measuring a range between 0.0 and 14.0.

 

The DO equipments shall be equipped with built-in salinity compensation or otherwise, in-situ salinity shall be measured according to Section 2.1.3.7 for calibration prior to each DO measurement.

2.1.3.2         Turbidity Measurement Instrument

The instrument shall be portable, battery operated and weatherproof. It shall have a photoelectric sensor capable of measuring turbidity between 0-1000 NTU, such as Hach model 2100P or similar instrument as approved.

2.1.3.3         Salinity

A portable salinometer with measuring range of 0-40 mg/L (YSI 30 Salinity meter or other approved instrument) shall be used to determine the salinity of the water.

2.1.3.4         Ammoniacal Nitrogen Measurement and Unionized Ammonia Calculation

For in-situ measurement, a portable, battery-operated meter with measuring range of 0.1–20 mg/L NH3-N (or other approved equipment) shall be used for the measurement of in-situ NH3-N at each designated monitoring station. Besides, equipment with measuring range of 0.1–20 mg/L NH3-N (or other approved equipment) capable of continuous NH3-N monitoring shall also be used for measurement of NH3-N at designated locations. For laboratory analysis, please refer to Section 2.1.3.9 for details.

Unionized Ammonia (UIA) shall be calculated from NH3-N determined/measured and in-situ measurement of temperature, pH and salinity.

 

For salinity > 18 ppt

 

UIA       = NH3-N x F

 

F          = 1 / (10pKas – pH + 1)

pKas     = pKaf + I x (0.1552 – 0.000314 x T)

pKaf      = 0.09018 + 2729.92 / (T + 273.15)

I           = 19.9273 x S / (1000 – 1.005109 x S)

 

Where,

S              – Salinity (ppt)

T              – Temperature (°C)

pH            – Power of Hydrogen

F              – Fraction of Unionized Ammonia (UIA)

NH3-N      – Ammoniacal Nitrogen

UIA          – Unionized Ammonia

2.1.3.5         Water Depth Detector

A portable, battery-operated echo sounder (Seafarer 700 or other approved instrument) shall be used for the measurement of water depth at each designated monitoring station. The unit shall either be handheld or affixed to the bottom of the work boat, if the same vessel is to be used throughout the monitoring programme.

2.1.3.6         Positioning Device

A digital Global Positioning System (GPS) shall be used during monitoring to ensure the monitoring vessel is at the correct location before taking measurements.

2.1.3.7         Calibration of In-Situ Instruments

All in-situ monitoring instruments shall be checked, calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme before use, and subsequently re-calibrated at 3 months intervals throughout the water quality monitoring programme. Responses of sensors and electrodes shall be checked with certified standard solutions before each use. Certificate for calibration of in-situ instruments shall also be provided for auditing.

Wet bulb calibration for a DO probe shall be carried out at least once per monitoring day. A zero check in distilled water shall be performed with the turbidity probe at least once per monitoring day. The probe shall then be calibrated with a solution of known NTU. In addition, the turbidity probe shall be calibrated at least twice per month to establish the relationship between turbidity readings (in NTU) and levels of suspended solids (in mgL-1).

For the on-site calibration of field equipment, the BS 1427: 1993, Guide to Field and On-Site Test Methods for the Analysis of Waters should be observed. Sufficient stocks of spare parts shall be maintained for replacements when necessary. Backup monitoring equipment shall also be made available so that monitoring is uninterrupted even when some equipment is under maintenance or calibration etc.

2.1.3.8         Water Sampling Equipment

A water sampler comprises a transparent PVC cylinder, with a capacity of not less than 2 litres, and could be effectively sealed with latex cups at both ends should be used. The sampler shall have a positive latching system to keep it open and prevent premature closure until it is released by a messenger when the sampler is at the selected water depth (Kahlsico Water Sampler or other approved instrument).

Water samples for suspended solids , NH3-N, BOD5, synthetic detergent and E. coli measurement shall be collected in high density polythene bottles, packed in ice (cooled to 4°C without being frozen), and delivered to the laboratory as soon as possible after collection.

2.1.3.9         Laboratory Measurement/Analysis

Sufficient water samples shall be collected at the monitoring stations for carrying out laboratory determination.

Analysis of suspended solids should be carried out in a HOKLAS or other international accredited laboratory. The SS determination work shall start within 24 hours after collection of the water samples. The SS analyses shall follow the standard method APHA 2540D with a detection limit of 1mg/L as described in APHA Standard Methods for the Examination of Water and Wastewater, 21st Edition, unless otherwise specified.

The NH3-N analyses shall follow the standard method APHA Method 4500-NH3 with a detection limit of 0.01mg/L as described in APHA Standard Methods for the Examination of Water and Wastewater, 21st Edition, unless otherwise specified.

The 5-day Biological Oxygen Demand (BOD5) analyses should follow the standard method APHA 5210B with a detection limit of 1mg/L as described in APHA Standard Methods for the Examination of Water and Wastewater, 21st Edition, unless otherwise specified.

Analysis of synthetic detergent (as Methylene Blue Active Substances (MBAS)) shall be carried out for samples taken at WSD intake point by a HOKLAS or other international accredited laboratory. 

Analysis of E. coli shall be carried out in a HOKLAS or other international accredited laboratory.  The E. coli determination work should start within 24 hours after collection of the water samples. 

If in-house or non-standard methods are proposed, details of the method verification shall, if required, be submitted to EPD. In any circumstances, sample testing methods shall be associated with comprehensive quality assurance and quality control programmes. The laboratory shall be prepared to demonstrate the quality control programmes to EPD or their representative when required.

Additional duplicate samples may be required by EPD for inter laboratory calibration. Remaining samples after analysis shall be kept by the laboratory for 3 months in case repeat analysis is required.

2.1.3.10     24 Hours Monitoring

A multi probe meter measuring dissolved oxygen, temperature and turbidity shall be set up at the 24 hours monitoring stations at Tsuen Wan and Tsing Yi WSD Flushing Water Intake, Ma Wan, Cheung Sha Wan, Lo Tik Wan and Sok Kwu Wan Fish Culture Zone. Continuous measurement of the aforesaid parameters should be taken 24 hours a day 7 days a week during dredging works. Exact locations of monitoring points, testing methodology and specifications shall be agreed with EPD, AFCD, WSD and IEC before undertaking any works.

Continuous monitoring of in-situ NH3-N at WSD Flushing Water Intake shall also be undertaken 24 hours a day 7 days a week during works. Exact locations of monitoring points, testing methodology and specifications shall be agreed with EPD, WSD and IEC before undertaking any works.

2.1.4           Monitoring Locations

The proposed water quality monitoring stations are shown in Table 2-1 and Figure 2.1. The monitoring stations proposed in this section are indicative and are subject to further review before construction commences. The final locations and number of the monitoring points shall be agreed with EPD at least 2 weeks before undertaking any works.  The status and locations of water sensitive receivers and the marine activities may change after issuance of this Manual. In any case, the ET Leader shall propose updated monitoring locations and seek approval from the IEC and EPD.

It is also proposed to monitor water quality at seawater intakes, beaches and other water sensitive receivers around the Project area.

It is recommended to conduct monitoring at the appropriate vertical levels of the abstraction points of the monitoring locations to collect information on water quality condition if practicable. Three Control Stations are proposed to provide controlled water quality data outside the project site and their respective positions are also shown in Table 2-1 and Figure 2.1.

Table 2.1       Water Quality Monitoring Stations

ID

Description

Easting

Northing

SR1

Near Hong Kong Garden, WSD Flushing Water Intake

822690.971

824644.361

SR2

Casam, Gazetted Beach

825723.225

825334.784

SR3

Approach, Gazetted Beach

826960.152

825260.726

SR4

Tsuen Wan, WSD Flushing Water Intake

828885.405

825835.454

SR5

Ma Wan, Fish Culture Zone

823713.220

823572.540

SR6

Kau Yi Chau, Corals

825655.637

816444.509

SR7

Green Island, Corals

829830.065

815996.449

SR8

Shek Kok Tsui, Corals

828562.803

811100.522

SR9

Cheung Sha Wan, Fish Culture Zone

819157.693

810781.289

SR10

Lo Tik Wan, Fish Culture Zone

831265.660

809114.040

SR11

Sok Kwu Wan, Fish Culture Zone

831767.455

807855.300

SR12

Tsing Yi, WSD Flushing Water Intake

829660.388

822944.842

SR13

EMSD Cooling Water Intake for Kwai Chung Hospital

831385.413

822050.367

G1

Gradient station

820626.195

822834.323

G2

Gradient station

825979.792

824683.158

G3

Gradient station

826431.159

820617.725

G4

Gradient station

830423.070

819431.722

G5

Gradient station

821388.238

815001.087

G6

Gradient station

831293.103

811408.482

C1

Control Station

817511.733

822492.021

C2

Control Station

825062.857

808648.094

C3

Control Station

835061.918

807452.449

Note:

The three control stations are located to avoid being influenced by works such that representative control samples are taken for assessment. Due to the extent of monitoring stations, control stations are located so that ambient conditions (upstream and downstream) of the whole monitoring zone during flood and ebb tide are monitored even though they are not entirely within the same water control zones.

When alternative monitoring locations are proposed, they should be chosen based on the following criteria:

a.    at locations close to and preferably at the boundary of the mixing zone of the major site activities as indicated in the EIA report, which are likely to have water quality impacts;

b.    close to the sensitive receptors which are directly or likely to be affected;

c.    for monitoring locations located in the vicinity of the sensitive receptors, care should be taken to cause minimal disturbance during monitoring;

d.    two or more control stations which should be at locations representative of the project site in its undisturbed condition. Control stations should be located, as far as is practicable, both upstream and down stream of the works area.

Measurements and water sample for parameters tested shall be taken at 3 water depths, namely, 1m below water surface, mid-depth and 1m above sea bed, except where the water depth less that 6m, the mid-depth station may be omitted. Should the water depth be less than 3m, only the mid-depth station shall be monitored. The ET Leader shall seek approval from the IEC and EPD on all the monitoring stations.

Replicates in-situ measurements and samples collected from each independent monitoring event are required for all parameters to ensure a robust statistically interpretable dataset.

2.1.5           Baseline Monitoring

The purpose of the baseline monitoring is to establish ambient conditions prior to the commencement of marine construction works and to demonstrate the suitability of the proposed monitoring stations. Baseline monitoring programme shall be scheduled as far as possible to avoid concurrent construction activities in the vicinity of the monitoring stations. The measurements shall be taken at all designated monitoring stations, 3-days per week, at mid-flood and mid-ebb tides, for at least 4 consecutive weeks prior to the commencement of marine construction works. The interval between two sets of monitoring shall not be less than 36 hours.

Two consecutive measurements of DO concentration (mgL-1), DO saturation (%) and turbidity (NTU) shall be taken in-situ according to the stated sampling method. Where the difference in value between the first and second measurement of DO or turbidity parameters is more than 25% of the value of the first reading, the reading shall be discarded and further readings should be taken. Water samples for SS, NH3-N, BOD5 synthetic detergents and E. coli measurements shall be collected at the same depths.

In addition to the above in-situ measurements, pH, water temperature and salinity shall be determined at all monitoring stations at the same depths, as specified above. Note that in addition to the water depth, monitoring location/position, time, weather conditions, sea conditions (where appropriate), tidal stage (where appropriate), and any special phenomena shall be recorded.

The baseline monitoring campaign shall be executed prior to commencement of marine construction works. In exceptional cases, when insufficient baseline monitoring data or questionable results are obtained, the ET Leader shall liaise with the IEC and EPD to agree on an appropriate set of data to be used as a baseline reference and submit to EPD for approval.

Baseline monitoring schedule shall be submitted to the Contractor, IEC, ER and EPD one week prior to the commencement of baseline monitoring. The interval between two sets of monitoring shall not be less than 36 hours.

2.1.6           Impact Monitoring

During the course of the marine construction works, impact monitoring shall be undertaken at all monitoring stations three working days per week (except for monitoring of synthetic detergent which is one day per month), at mid-ebb and mid-flood tides, with sampling /measurement. The interval between two sets of monitoring shall not be less than 36 hours except where the Action and/or Limit levels is/are exceeded, in which case the monitoring frequency shall be increased.

Two consecutive measurements of DO concentration (mgL-1), DO saturation (%) and turbidity (NTU) shall be taken in-situ according to the stated sampling method. Where the difference in value between the first and second measurement of DO or turbidity parameters is more than 25% of the value of the first reading, the reading should be discarded and further readings shall be taken. Water samples for SS, NH3-N, BOD5, synthetic detergent and E. coli measurements shall be collected at the same depths. Duplicate water samples shall be taken and analyzed. Sample of environmental monitoring record sheet was provided in Annex B.

In addition to the above in-situ measurements, pH, water temperature, salinity and NH3-N/UIA (SR2 and SR3 only) shall be determined at all monitoring stations at the same depths, as specified above. Note that in addition to the water depth, monitoring location/position, time, weather conditions, sea conditions (where appropriate), tidal stage (where appropriate), and any special phenomena shall be recorded. Parameters to be monitored at each monitoring station are detailed in Table 2.2.

Table 2.2       Water Quality Monitoring Parameters


Note:

1. All monitoring except Synthetic Detergent shall be taken 3-days per week, at mid-flood and mid-ebb

2. Monitoring of Synthetic Detergent shall be taken ONE day per month, at mid-flood and mid-ebb

3. In-situ unionized ammonia (UIA) for SR2 and SR3 shall be calculated from in-situ measurement of NH3-N, temperature, pH and salinity.

4. Laboratory determined unionized ammonia (UIA) for SR2 and SR3 shall be calculated from analysed NH3-N from water samples taken and in-situ measurement of temperature, pH and salinity.  

Proposed water quality monitoring schedule shall be provided to the Contractor, IEC, ER and EPD on or before the first day of the monitoring month. The Contractor, IEC, ER and EPD shall be notified immediately for any change in the schedule.

2.1.7           Post-Construction Monitoring

Upon completion of all marine construction activities, a post project water quality monitoring exercise shall be carried out for four weeks upon completion of all marine activities, in the same manner as the impact monitoring during construction period.

2.1.8           Event and Action Plan for Water Quality

The Action and Limit Levels for water quality are defined in Table 2.3. The actions in accordance with the Action Plan in Table 2.4 should be carried out if the water quality assessment criteria are exceeded at any designated monitoring points.

Table 2.3       Typical Action and Limit Levels for Water Quality

Parameters

Action Level

Limit Level

DO in mg/L

(Surface, Middle & Bottom)

WSD Seawater Intakes

2 mg/L#

Other Impact Monitoring Stations

5 percentile of baseline data for surface, middle and bottom layer

Surface and Middle

WSD: Seawater Intakes 2 mg/L#

FCZ: 5 mg/L or 1 percentile of baseline data

Other Impact Monitoring Stations: 4 mg/L or 1 percentile of baseline data

Bottom

2 mg/L or 1 percentile of baseline data

SS in mg/L

(depth-averaged)

WSD Seawater Intakes

<10 mg/L#

Other Impact Monitoring Stations

95 percentile of baseline data or 120% of upstream control station at the same tide of the same day

WSD Seawater Intakes

<10 mg/L#

Other Impact Monitoring Stations

99 percentile of baseline data or 130% of upstream control station at the same tide of the same day

NH3-N in mg/L

(depth-averaged)

WSD Seawater Intakes

<1mg/L#

Other Impact Monitoring Stations

95 percentile of baseline data or 120% of upstream control station at the same tide of the same day

WSD Seawater Intakes

<1 mg/L#

Other Impact Monitoring Stations

99 percentile of baseline data or 130% of upstream control station at the same tide of the same day

Turbidity (depth-averaged)

WSD Seawater Intakes

<10 NTU#

Other Impact Monitoring Stations

95 percentile of baseline data or 120% of upstream control station at the same tide of the same day

WSD Seawater Intakes

<10 NTU#

Other Impact Monitoring Stations

99 percentile of baseline data or 130% of upstream control station at the same tide of the same day

BOD5

WSD Seawater Intakes

<10mg/L#

WSD Seawater Intakes

<10mg/L#

E. coli / 100ml

WSD Seawater Intakes

<20,000#

WSD Seawater Intakes

<20,000#

Synthetic Detergent

(as MBAS)+

WSD Seawater Intakes

< 5mg/L#

WSD Seawater Intakes

< 5mg/L#

Unionized Ammonia (UIA)^

0.021mg/L

0.021mg/L

Notes:

1.      “Depth-averaged” is calculated by taking the arithmetic means of the readings of the surface, middle and bottom depths.

2.      For DO measurement, non-compliance occurs when monitoring result is lower than the limits.

3.      For SS, NH3-N and turbidity, non-compliance of water quality results when monitoring results is higher than the limits.

4.      All the figures given in the table are used for reference only and the EPD may amend the figures whenever necessary.

5.      #WQO of Sea Water for Flushing Supply (at intake point)

6.      Detail methodology shall be agreed with EPD and WSD (where it is related to monitoring at WSD seawater intakes)

7.      ^ Refer to Water Quality Objectives (WQOs) annual mean of UIA

Table 2.4       Typical Event and Action Plan for Water Quality for Construction Phase

Event

Action

ET Leader

IEC

ER

Contractor

Action Level

 

 

 

 

1. Exceedance for one sample

1.   Repeat in-situ measurement to confirm finding;

2.   Identify source(s) of impact;

3.   Inform IEC and Contractor;

4.   Check monitoring data, all plant, equipment and Contractor’s working methods;

5.   Discuss mitigation measures with IEC and Contractor; and

6.   Repeat measurement on next day of exceedance.

1.   Discuss with ET and Contractor on the mitigation measures;

2.   Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and

3.   Assess the effectiveness of the implemented mitigation measures.

 

1.   Discuss with IEC on the proposed mitigation measures; and

2.   Make agreement on the mitigation measures to be implemented.

 

1.   Inform the ER and confirm notification of the non-compliance in writing;

2.   Rectify unacceptable practice;

3.   Check all plant and equipment;

4.   Consider changes of working methods;

5.   Discuss with ET and IEC and propose mitigation measures to IEC and ER; and

6.   Implement the agreed mitigation measures.

Exceedance for two or more consecutive samples

 

1.   Repeat in-situ measurement to confirm finding;

2.   Identify source(s) of impact;

3.   Inform IEC and Contractor;

4.   Check monitoring data, all plant, equipment and Contractor’s working methods;

5.   Discuss mitigation measures with IEC and Contractor;

6.   Ensure mitigation measures are implemented;

7.   Prepare to increase the monitoring frequency to daily; and

8.   Repeat measurement on next day of exceedance.

1.   Discuss with ET and Contractor on the mitigation measures;

2.   Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and

3.   Assess the effectiveness of the implemented mitigation measures.

 

1.   Discuss with IEC on the proposed mitigation measures;

2.   Make agreement on the mitigation measures to be implemented; and

3.   Assess the effectiveness of the implemented mitigation measures.

1.   Inform the ER and confirm notification of the non-compliance in writing;

2.   Rectify unacceptable practice;

3.   Check all plant and equipment;

4.   Consider changes of working methods;

5.   Discuss with ET and IEC and propose mitigation measures to IEC and ER within 3 working days; and

6.   Implement the agreed mitigation measures.

Limit Level

 

 

 

 

Exceedance for one sample

1.   Repeat in-situ measurement to confirm finding;

2.   Identify source(s) of impact;

3.   Inform IEC, Contractor and EPD, if the exceedance is recorded at Fish Culture Zone, AFCD should be informed. If the exceedance is recorded at WSD Flushing Water intakes, WSD should be informed;

4.   Check monitoring data, all plant, equipment and Contractor’s working methods;

5.   Discuss mitigation measures with IEC, ER and Contractor;

6.   Ensure mitigation measures are implemented; and

7.   Increase the monitoring frequency to daily until no exceedance of Limit level.

1.   Discuss with ET and Contractor on the mitigation measures;

2.   Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and

3.   Assess the effectiveness of the implemented mitigation measures.

 

1.   Discuss with IEC, ET and Contractor on the proposed mitigation measures; and

2.   Request Contractor to critically review the working methods;

3.   Make agreement on the mitigation measures to be implemented; and

4.   Assess the effectiveness of the implemented mitigation measures.

1.   Inform the ER and confirm notification of the non-compliance in writing;

2.   Rectify unacceptable practice;

3.   Check all plant and equipment;

4.   Consider changes of working methods;

5.   Discuss with ET and IEC and ER and propose mitigation measures to IEC and ER within 3 working days; and

6.   Implement the agreed mitigation measures.

Exceedance for two or more consecutive samples

1.   Repeat in-situ measurement to confirm finding;

2.   Identify source(s) of impact;

3.   Inform IEC, Contractor and EPD, if the exceedance is recorded at Fish Culture Zone, AFCD should be informed. If the exceedance is recorded at WSD Flushing Water intakes, WSD should be informed;

4.   Check monitoring data, all plant, equipment and Contractor’s working methods;

5.   Discuss mitigation measures with IEC, ER and Contractor;

6.   Ensure mitigation measures are implemented; and

7.   Increase the monitoring frequency to daily until no exceedance of Limit level for two consecutive days.

1.   Discuss with ET and Contractor on the mitigation measures;

2.   Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly; and

3.   Assess the effectiveness of the implemented mitigation measures.

 

1.   Discuss with IEC, ET and Contractor on the proposed mitigation measures; and

2.   Request Contractor to critically review the working methods;

3.   Make agreement on the mitigation measures to be implemented;

4.   Assess the effectiveness of the implemented mitigation measures; and

5.   Consider and instruct, if necessary, the Contractor to slow down or to stop all or part of the marine work until no exceedance of Limit Level.

1.   Inform the ER and confirm notification of the non-compliance in writing;

2.   Rectify unacceptable practice;

3.   Check all plant and equipment;

4.   Consider changes of working methods;

5.   Discuss with ET and IEC and ER and propose mitigation measures to IEC and ER within 3 working days;

6.   Implement the agreed mitigation measures; and

7.   As directed by the ER, to slow down or to stop all or part of the marine work or construction activities.

 

2.1.9           Event and Action Plan for Water Quality at WSD Flushing Water Intake at Tsing Yi

In addition to the actions required to be taken in accordance with the Event and Action Plan in Table 2.4, for the exceedance of SS and NH3-N (including instantaneous NH3-N results) at the WSD seawater intake at Tsing Yi, the Contractor shall review dredging operation and propose mitigation measures not limited to reducing dredging rate. If exceedance persists, the Contractor shall propose not to undertake dredging operation in close proximity to the flushing water intake at Tsing Yi during flood tide until no exceedance is confirmed. The Contactor shall liaise with ET Leader, IEC, ER, EPD and WSD for the proposed mitigation measures.  

2.1.10       24 Hours Water Quality Monitoring

To supplement the routine water quality monitoring activities, as agreed with WSD, EMSD and AFCD, it is recommended to perform 24 hours water quality monitoring at the following locations (Table 2.5 and Figure 2.1) to monitor if there were any deterioration in water quality at any time during dredging works.

For 24 hrs water quality monitoring, the monitoring shall be performed at a depth of 1 to 2m below the water surface. The 24-hrs monitoring stations can provide a continual data collection for dissolved oxygen, temperature, turbidity and NH3-N (at SR4 and SR12 only) to supplement routine monitoring activities. Water quality data are logged at an intervals of 5 minutes, in case where an action/limit exceedance is evidenced (a continuous exceedance for any 30 minutes i.e. 6 continuous monitoring data, to be agreed with EPD, AFCD and WSD), additional water sampling shall be carried out to verify if there were any deterioration in water quality due to the dredging works.

Table 2.5       24 Hours Water Quality Monitoring Stations

ID

Description

Easting

Northing

SR4

Tsuen Wan, WSD Flushing Water Intake

828885.405

825835.454

SR5

Ma Wan, Fish Culture Zone

823713.220

823572.540

SR9

Cheung Sha Wan, Fish Culture Zone

819157.693

810781.289

SR10

Lo Tik Wan, Fish Culture Zone

831265.660

809114.040

SR11

Sok Kwu Wan, Fish Culture Zone

831767.455

807855.300

SR12

Tsing Yi, WSD Flushing Water Intake

829660.388

822944.842

SR13

EMSD Cooling Water Intake for Kwai Chung Hospital

831385.413

822050.367

The exact location for installing the monitoring probes shall be proposed by the ET and agreed by EPD, AFCD and WSD (for seawater intakes), in consultation with stakeholders (such as mariculturists).

In order to ensure the reliability of the monitoring equipment, monitoring probes should be cleaned and checked twice a week. In addition, all probes shall be calibrated at least once every 3 months.

2.1.11       Event and Action Plan for 24 Hrs Water Quality Monitoring

The determination of Action and Limit Levels for dissolved oxygen and turbidity shall follow the definition in Table 2.3 based on the water quality monitoring results acquired during baseline monitoring as mentioned in Section 2.1.5.

The actions in accordance with the Event and Action Plan in Table 2.6 shall be carried out if the water quality assessment criteria is exceeded at any proposed monitoring locations.

Table 2.6       Typical Event and Action Plan for 24 Hours Water Quality Monitoring

Event

 

 

Action

 

ET Leader

Contractor

ER

IEC

Action Level 

 

 

 

On Action Level exceedance of turbidity or DO (mg/L)

(over a period of 30-minute). Notification is sent to ET, Contractor, ER, EPD, AFCD and WSD automatically via email

1.   Check data and determine if the exceedance was due to equipment problem.  If so, fix the problem within 1 working day.  Continue monitoring 

2.  Carry out investigation as soon as possible after identification of exceedance.  Check monitoring data (including data from regular water quality), all plant, equipment and Contractor’s working methods; 

3.  Report the initial investigation results to the Contractor within 24 hours of identification of exceedance.  Advise contractor if exceedance may be due to contractor’s construction works. 

4.  Conduct water quality monitoring at the mariculture/ WSD flushing water intake station with exceedance recorded and gradient stations in vicinity within 18 hours of identification of exceedance if the exceedance may be due to the works.  Parameters to monitor include DO (mg/L), turbidity and SS. 

5.   Report the monitoring data to the Contractor within 48 hours of identification of exceedance.  Advise contractor if exceedance is due to contractor’s construction works. 

6.   Discuss mitigation measures with IEC, ER and Contractor within 2 working days of submission of the investigation results. 

7.   Ensure mitigation measures are implemented; 

8.   Closely monitor the concerned 24-hr station.

 

 

 

1.   Check all plant and equipment;

2.   Consider changes of working methods; 

3.   Rectify unacceptable practice;

4.   Submit the monitoring data and results of the investigation to IEC and ER within 48 hours of the identification of an exceedance Inform EPD, AFCD and WSD of the results;

5.   Discuss with ET, IEC and ER and propose mitigation measures to IEC and ER within 2 working days of submission of the investigation results;

6.   Implement the agreed mitigation measures within reasonable time scale 

 

1. Request Contractor to critically  review the working methods;

2. Discuss with IEC, ET and Contractor on the proposed mitigation measures; 

3. Ensure remedial measures are properly implemented 

4. Assess the effectiveness of the implemented mitigation measures

1.   Check monitoring data submitted by ET

2.   Confirm ET assessment if exceedance is due /not due to the works 

3.   Discuss with ET, ER and Contractor on the mitigation measures

4.   Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly 

5.   Assess the effectiveness of the implemented mitigation measures

Limit Level 

 

 

 

 

On Limit Level exceedance of turbidity or DO (mg/L)

(over a period of 30-minute). Notification is sent to ET, Contractor, ER, EPD, AFCD and WSD automatically via email

1.   Check data and determine if the exceedance was due to equipment problem.  If so, fix the problem within 1 working day.  Continue monitoring 

2.  Carry out investigation as soon as possible after identification of exceedance.  Check monitoring data (including data from regular water quality), all plant, equipment and Contractor’s working methods; 

3.  Report the initial investigation results to the Contractor within 24 hours of identification of exceedance.  Advise contractor if exceedance may be due to contractor’s construction works. 

4.  Conduct water quality monitoring at the all monitoring stations within 18 hours of identification of exceedance if the exceedance may be due to the works. Parameters to monitor include DO (mg/L), turbidity and SS.

5.   Report the monitoring data to the Contractor within 48 hours of identification of exceedance.  Advise contractor if exceedance is due to contractor’s construction works. 

6.   Discuss mitigation measures with IEC, ER and Contractor within 2 working days of submission of the investigation results. 

7.   Ensure mitigation measures are implemented; 

8.   Closely monitor the concerned 24-hr station.

1.   Check all plant and equipment;

2.   Consider changes of working methods; 

3.   Rectify unacceptable practice;

4.   Submit the monitoring data and results of the investigation to IEC and ER within 48 hours of the identification of an exceedance Inform EPD, AFCD and WSD of the results;

5.   Discuss with ET, IEC and ER and propose mitigation measures to IEC and ER within 2 working days of submission of the investigation results;

6.   Implement the agreed mitigation measures within reasonable time scale;

7.  As directed by ER, to slow down or stop all or part of the marine work or construction activities.

 

1. Request Contractor to critically  review the working methods;

2. Discuss with IEC, ET and Contractor on the proposed mitigation measures; 

3. Ensure remedial measures are properly implemented 

4. Assess the effectiveness of the implemented mitigation measures;

5. Consider and instruct, if necessary, the Contractor to slow down or to stop all or part of the marine work until no exceedance of Limit Level.

1.   Check monitoring data submitted by ET

2.   Confirm ET assessment if exceedance is due /not due to the works 

3.   Discuss with ET, ER and Contractor on the mitigation measures

4.   Review proposals on mitigation measures submitted by Contractor and advise the ER accordingly 

5.   Assess the effectiveness of the implemented mitigation measures

2.1.12       Hydraulic Performance Measurement

Hydraulic performance measurement is required to measure the velocities and water levels of the pipes before, during and after the proposed Tsing Yi submarine outfall modification works. Detailed hydraulic performance measurement plan (which include details of the proposed locations of flow sensor, monitoring programme and proposed equipment for the flow survey) shall be prepared and agreed with ER and DSD before carrying out the measurement.

2.1.13       Mitigation Measures

The mitigation measures recommended for the construction and operation phase of the dredging works are presented in Annex A.

2.2               Operation Phase

Maintenance dredging during operation phase has the potential to generate water quality impacts, marine water quality monitoring is recommended during maintenance dredging works to ensure that any unacceptable increase in suspended solids/turbidity and decrease in dissolved oxygen due to dredging works are readily detected and timely action be taken to rectify the situation.  

It is recommended that water sampling and measurement of pH, Temperature, Salinity, Suspended Solids, Turbidity and Dissolved Oxygen, BOD5, E.coli only shall be carried out at the following locations (Table 2.7) during the period of maintenance dredging. No 24-hours water quality monitoring (except NH3-N at SR12) is required as the anticipated scale and duration of maintenance dredging is insignificant compared with that for the capital dredging. For water quality monitoring during maintenance dredging, ammoniacal nitrogen shall also be carried out at designated WSD seawater intakes as shown in Table 2.8. Subject to the review of environmental performance of dredging operation, monitoring programme may be changed if supporting evidence is obtained through the operational phase water quality monitoring and audit programme.

Table 2.7       Water Quality Monitoring Stations for parameters other than NH3-N during Maintenance Dredging

ID

Description

Easting

Northing

SR4

Tsuen Wan, WSD Flushing Water Intake

828885.405

825835.454

SR5

Ma Wan, Fish Culture Zone

823713.220

823572.540

SR9

Cheung Sha Wan, Fish Culture Zone

819157.693

810781.289

SR10

Lo Tik Wan, Fish Culture Zone

831265.660

809114.040

SR11

Sok Kwu Wan, Fish Culture Zone

831767.455

807855.300

SR12

Tsing Yi, WSD Flushing Water Intake

829660.388

822944.842

C1

Control Station

817511.733

822492.021

C2

Control Station

825062.857

808648.094

C3

Control Station

835061.918

807452.449

Table 2.8       Water Quality Monitoring Stations for NH3-N during Maintenance Dredging

ID

Description

Easting

Northing

SR1

Near Hong Kong Garden, WSD Flushing Water Intake

822690.971

824644.361

SR4

Tsuen Wan, WSD Flushing Water Intake

828885.405

825835.454

SR12

Tsing Yi, WSD Flushing Water Intake

829660.388

822944.842

The monitoring frequency and proposed monitoring equipment shall be following that for construction phase. EPD, AFCD and WSD shall be notified of the detailed arrangement prior to the commencement of the dredging works and the associated water quality monitoring programme. Any change in water quality monitoring programme including monitoring locations, parameters and frequency shall be agreed with EPD, AFCD and WSD.



3.1               Introduction

The Contractor shall prepare a plan for controlling the waste generated from the construction activities (for both construction and operation phase). Besides removal of waste material produced and implementation of recommended mitigation measures to minimise waste problems arising, a site waste inventory record shall be maintained. The Contractor shall describe good site practice to ensure that the waste impacts are minimised and shall make sure that relevant disposal permits are obtained.

For the waste to be disposed appropriately, it is recommended that, if practical, the waste shall be separated by category on-site by the Contractor. The following categories shall be adopted:

¡      General refuse;

¡      Chemical waste; and

¡      Marine Dredged Sediment

3.2               Audit Requirements

It is recommended that auditing of each waste stream shall be carried out periodically by the Contractor to determine if wastes are being managed in accordance with approved procedures and the site waste management plan.  The audits shall examine all aspects of waste management including waste generation, storage, recycling, treatment, transport and disposal.  An appropriate audit programme would be to undertake an audit at the commencement of the construction works, and then to audit weekly thereafter.

3.3               Mitigation Measures

3.3.1           Good Site Practices

Adverse impacts relating to waste management such as odour, noise and wastewater discharge are not expected to arise, provided that good site practices are strictly followed. Recommendations for good site practices during the construction activities include:

¡      Obtain the profile of different sediment categories and careful planning of sediment removal

¡      Strictly follow various mitigation measures for protecting water quality as described in water quality section

¡      Nomination of an approved person, such as a site manager, to be responsible for good site practices, arrangements for collection and effective disposal to an appropriate facility, of all wastes generated at the site

¡      Training of site personnel in proper waste management and chemical handling procedures

¡      Provision of sufficient waste disposal points and regular collection of waste

¡      Barges filled with dredged sediment shall be towed away immediately for disposal. In so doing, odour is not anticipated to be an issue to distant sensitive receivers

¡      Well planned delivery programme for offsite disposal such that adverse environmental impact from transporting sediment material is not anticipated

¡      Use only well maintained Powered Mechanical Equipment (PME) on site

3.3.2           General Refuse

General refuse will be stored in enclosed bins. A reputable waste collector will be employed by the contractor to remove general refuse from the site.

3.3.3           Chemical Waste

If chemical wastes are produced at the construction site, the Contractor shall be required to register with the EPD as a chemical waste producer and to follow the guidelines stated in the Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes. Good quality containers compatible with the chemical wastes shall be used, and incompatible chemicals should be stored separately. Appropriate labels shall be securely attached on each chemical waste container indicating the corresponding chemical characteristics of the chemical waste, such as explosive, flammable, oxidizing, irritant, toxic, harmful, corrosive, etc. The Contractor shall use a licensed collector to transport and dispose of the chemical wastes, to either the approved Chemical Waste Treatment Centre, or another licensed facility, in accordance with the Waste Disposal (Chemical Waste) (General) Regulation.

3.3.4           Marine Dredged Sediment

The basic requirements and procedures for dredged/excavated sediment disposal are specified under the ETWB TCW No. 34/2002 Management of Dredged/Excavated Sediment. The management of the dredging/excavation, use and disposal of marine sediment is monitored by the Marine Fill Committee (MFC), while the licensing of marine dumping is the responsibility of the Director of Environmental Protection (DEP).

The sediment shall be dredged and transferred to barges for subsequent disposal as allocated by MFC depending on the level of contamination. Release of dredged sediment into the surrounding water shall be avoided. It is recommended that the distance between the barge and the dredging point be shortened as far as possible to avoid dropping of sediment from the close grab to seawater.

Category Mp, Mf and H (chemical screening results > UCEL & < 10 times LCEL; Type 2 confined marine disposal) material (Table 4.7 of the EIA Report) was identified at the dredging site in this assessment. Under the current disposal planning, Category Mp sediment is to be dredged and disposed of at South of Brothers confined marine disposal facilities or alternatively cross boundary disposal facility. While Category Mf and H sediments will go to the confined marine disposal facilities at South of Brothers confined marine disposal facilities which are designated disposal site for contaminated sediment

For Category L material, which is suitable for open sea disposal in accordance with ETWB TCW no. 34/2002, would be assigned for disposal locations such as South Cheung Chau Open Sea Disposal Area, East Ninepin Open Sea Disposal Area or other designated locations.

During transportation and disposal of the dredged marine sediments for Type 1 and Type 2 disposal (ETWB TCW no. 34/2002 refers), the following measures shall be taken to minimise potential impacts on water quality (please refer to Annex A, Environmental Mitigations Implementation Schedule for details):

¡      Bottom opening of barges will be fitted with tight fitting seals to prevent leakage of material. Excess material shall be cleaned from the decks and exposed fittings of barges and dredgers before the vessel is moved.

¡      Monitoring of the barge loading shall be conducted to ensure that loss of material does not take place during transportation.  Transport barges or vessels shall be equipped with automatic self-monitoring devices as specified by the EPD.

¡      Barges or hopper barges shall not be filled to a level that would cause the overflow of materials or sediment laden water during loading or transportation.

¡      Strictly follow all conditions stipulated in the dumping permit.


4.1               Construction Phase

4.1.1           Proposed Mitigation Measure

The provision of water quality related mitigation measures and general good site practices as described in Section 3 of the EIA report shall be able to minimize impact on marine ecology. No other measures specified on marine ecology are therefore considered necessary.

4.1.2           Audit Requirement

During construction phase, water quality monitoring shall be carried out at selected sensitive receivers (including marine ecological sensitive receivers). Details of the requirement are listed in Section 2. The water quality monitoring programme is to monitor any potential impact to the marine ecology induced by deteriorations in water quality and allow quick action to be taken in accordance with the action plan included to alleviate the situation. No other marine ecology-specific monitoring programme is considered necessary.

4.2               Operation Phase

No marine ecology specific monitoring is required during maintenance dredging.


5.1               Construction Phase

5.1.1           Proposed Mitigation Measure

The provision of water quality related mitigation measures and general good site practices as described in Section 3 of the EIA report shall be able to minimize any adverse environmental impact to fisheries. No other measures specified on fisheries are therefore considered necessary.

5.1.2           Audit Requirement

The implementation of the water quality mitigation measures stated in Section 2 should be checked as part of the environmental monitoring and audit procedures during the construction phase. Monitoring of water quality parameters including Dissolved Oxygen (DO), Dissolved Oxygen Saturation (DO%), temperature, turbidity, salinity, suspended solid (SS), etc, should be conducted at the four fish culture zones (FCZ) (Ma Wan, Lo Tik Wan, Sok Kwu Wan and Cheung Sha Wan FCZs) during the course of the marine construction works as part of the routine impact monitoring. 24 hours monitoring shall be carried out at the monitoring stations of the four FCZs to undertake continuous measurements of DO, temperature and turbidity to supplement the routine monitoring activities in case where an action/limit exceedance (in DO and turbidity) is evidence. Details of the monitoring requirement, locations and frequency are presented in Section 2.

5.2               Operation Phase

No specific mitigation measures and monitoring for fisheries is required.


6.1               Construction Phase

6.1.1           Introduction

Quantitative Risk Assessment (QRA) study for this Project examined the effect from the proposed dredging work near Tsing Yi Island on risk levels posed by the SINOPEC N11 and ExxonMobil N6 LPG/ oil depots. Major hazardous incidents which could potentially impact on the dredging area were evaluated in terms of their hazard consequences and occurring frequencies. The overall risk levels show that the two depots marginally meet the Hong Kong Government Risk Guidelines, which is consistent with previous studies. The increase in societal risk caused by the presence of dredging workers is minimal comparing to the overall risk level, and is not permanent. Therefore it can be concluded that the risks posed by two PHIs on the neighbouring population and the dredging workers satisfy the Hong Kong Government Risk Guidelines.

6.1.2           Mitigation Measures

The implementation schedule of the recommended hazard to life mitigation measures is presented in Annex A.

6.2               Operation Phase

With maintenance dredging activities are expected to be less frequent and involve smaller volume of material compared to the capital works dredging and thus, it may be surmised that risks associated with maintenance dredging will similarly satisfy Hong Kong Government Risk Guidelines.


7.1               Introduction

The proposed works involve seabed dredging, with only a small number of dredgers to be used.  Given the busy maritime traffic in the existing fairways, no landscape and visual impacts are anticipated.

The proposed dredging works is not anticipated to cause any adverse glare nuisance, as there is no man-made light sources that are generated and directly pointing to VSRs. Besides, no facilities or equipment is installed with mirrors or any other polished materials and visa shields to lights of dredgers is to be provided. As such, no unacceptable glare effect which potentially causing uncomfortable glare effects is anticipated.

7.2               Mitigation Measures

7.2.1           Landscape Mitigation Measures

As the proposed Project involves no land works, no conflicts with existing landscape resources and landscape character areas were anticipated. No specific mitigation measure is required.

7.2.2           Visual and Glare Mitigation Measures

Although no significant visual and glare effects were identified, some precautionary measures are recommended to ensure the environmental performance in terms of visual and glare nuisance.

The proposed mitigation measures for the construction and operation phases of the Project are listed in Annex A. 

7.3               Construction and Operation Phase Audit

Although the proposed Project is not expected to cause any adverse landscape, visual and glare effects, proper implementation of mitigation measures should be checked as part of the environmental monitoring and audit programme.

 

 


8.1               Construction Phase

As detailed in Section 9 of the EIA Report, none of the unidentified sonar contacts are within the Western Fairway which indicated no archaeological potential and no further action is therefore required in this area.

Container Basin and Northern Fairway has low archaeological potential but there are 20 unidentified sonar contacts.  The archaeological potential of the sonar contacts is considered very low due to the extent of previous dredging across the whole area. 

It is recommended that a monitoring brief should be conducted during the dredging.  It shall only be required during dredging at the locations of the 20 unidentified sonar contacts and masked areas and does not need to cover all of the dredging activities. A marine archaeologist shall be present to monitor the dredged spoil and provide advice.  Dredging staff should be briefed about the possibility of locating archaeological objects. If material indicative of archaeological remains is retrieved, the AMO should be contacted as soon as possible.

8.2               Operation Phase

No monitoring is required during maintenance dredging.

 

 

 


9.1               Construction Phase

Based on the assessment, there is no existing nor are there any planned NSRs identified within 300 m from the works areas and the predicted construction noise level at the NSR located nearest to the works areas is far below the daytime noise criteria.  Therefore construction noise monitoring is not required. If any planned noise sensitive uses within 300m from the works area are occupied during the dredging period, a noise monitoring EM&A programme should be implemented during the period(s) with predicted occurrence of noisy activities.

9.2               Operation Phase

With the predicted compliance of noise level during maintenance dredging with the daytime standard and no 24 hours maintenance dredging is anticipated, noise monitoring is therefore not required during maintenance dredging.


10.1          Construction Phase

Air quality monitoring is not required. A regular site audit (weekly audit) shall be conducted to ensure compliance of the relevant requirements of the Air Pollution Control (Construction Dust) Regulation.

10.2          Operation Phase

Air quality impact is not anticipated and therefore no air quality monitoring during maintenance dredging is required.

 

 

11.      Environmental Audit

11.1          Introduction

Site Inspections provide a direct means to trigger and enforce the specified environmental protection and pollution control measures.  They shall be undertaken routinely by the ET Leader to inspect the construction activities in order to ensure that appropriate environmental protection and pollution control mitigation measures are properly implemented.  With well defined pollution control and mitigation specifications and a well established site inspection, deficiency and action reporting system, the site inspection is one of the most effective tools to enforce the environmental protection requirements on the construction site.

Regular site inspections shall be carried out at least once per week.  The areas of inspection shall not be limited to the pollution control and mitigation measures within the site; the environmental situation outside the site area which is likely to be affected, directly or indirectly, by the site activities shall be reviewed.  The ET Leader shall make reference to the following information when conducting the inspection:

a)         the EIA recommendations on environmental protection and pollution control mitigation measures;

b)         works progress and programme; 

c)         individual works methodology proposals (which shall include proposal on associated pollution control measures); 

d)         the contract specifications on environmental protection; 

e)         the relevant environmental protection and pollution control laws; and 

f)           previous site inspection results. 

The Contractor should update the ET Leader with all relevant information of the construction contract for him to carry out the site inspections.  The inspection results and its associated recommendations on improvements to the environmental protection and pollution control works should be submitted to the IEC and the Contractor within 24 hours, for reference and for taking immediate action.  The Contractor should follow the procedures and time-frame as stipulated in the environmental site inspection, deficiency and action reporting system formulated by the ET Leader to report on any remedial measures subsequent to the site inspections.

Ad hoc site inspections shall also be carried out if significant environmental problems are identified.  Inspections may also be required subsequent to receipt of an environmental complaint, or as part of the investigation work, as specified in the Action Plan for environmental monitoring and audit.

11.2          Compliance with Legal and Contractual Requirements

There are contractual environmental protection and pollution control requirements as well as environmental protection and pollution control laws in Hong Kong which the construction activities shall comply with.

The implementation schedule of mitigation measures is summarised in Annex A.

The ET Leader shall review the progress and programme of the works to check that relevant environmental laws have not been violated, and that any foreseeable potential for violating the laws can be prevented. 

The Contractor shall regularly copy relevant documents to the ET Leader so that the checking work can be carried out.  The document shall at least include the updated Work Progress Reports, the updated Works Programme, application letters for different license/permits under the environmental protection laws, and all the valid license/permit. The site diary shall also be available for the ET Leader's inspection upon his request.

After reviewing the document, the ET Leader shall advise the ER and the Contractor of any non-compliance with the contractual and legislative requirements on environmental protection and pollution control for them to take follow-up actions.  If the ET Leader's review concludes that the current status on license/permit application and any environmental protection and pollution control preparation works may not cope with the works programme or may result in potential violation of environmental protection and pollution control requirements by the works in due course, he shall advise the Contractor and the ER accordingly.

Upon receipt of the advice, the Contractor shall take immediate action to remedy the situation.  The ER shall follow up to ensure that appropriate action has been taken by the Contractor in order that the environmental protection and pollution control requirements are fulfilled.

11.3          Environmental Complaints

Handling of environmental complaints shall follow the environmental complaint flow diagram and reporting channel as presented in Figure 11.1.

During the complaint investigation work, the Contractor and ER shall cooperate with the IEC and ET Leader in providing all necessary information and assistance for completion of the investigation. If mitigation measures are identified in the investigation, the Contractor shall promptly carry out the mitigation works. The ER shall ensure that the measures have been carried out by the Contractor. Sample of the complaint log is shown in Annex C.


12.1          General

The reporting requirements of EM&A information are based upon a paper-documented approach.  However, the same information can be provided in an electronic medium upon agreeing the format with the ER and EPD.  This will enable a transition from a paper / historic and reactive approach to an electronic / real time proactive approach.

Types of reports that the ET Leader shall prepare and submit include baseline monitoring report, monthly EM&A report, quarterly EM&A summary report and final EM&A review report.  In accordance with Annex 21 of the EIAO-TM, a copy of the monthly, quarterly summary and final review EM&A reports shall be made available to the Director of Environmental Protection. The exact details of the frequency, distribution and time frame for submission shall be agreed with EPD prior to commencement of works.

12.2          Electronic Reporting

To facilitate the public inspection of the Baseline Monitoring Report and monthly EM&A Reports, via the EIAO Internet Website and at the EIAO Register Office, electronic copies of these Reports should be prepared in Hyper Text Markup Language (HTML) (version 4.0 or later) and in Portable Document Format (PDF version 4.0 or later), unless otherwise agreed by EPD and shall be submitted at the same time as the hard copies. For the HTML version, a content page capable of providing hyperlink to each section and sub-section of the EM&A Reports shall be included in the beginning of the document. Hyperlinks to all figures, drawings and tables in the EM&A Reports shall be provided in the main text from where the respective references are made. All graphics in the report shall be in interlaced GIF format unless otherwise agreed by the EPD. The content of the electronic copies of the EM&A Reports must be the same as the hard copies.

12.3          Baseline Monitoring Report

The ET Leader shall prepare and submit a Baseline Environmental Monitoring Report within 10 working days of completion of the baseline monitoring.  Copies of the Baseline Environmental Monitoring Report should be submitted to all parties: the Contractor, the IEC, the ER and the EPD.  The ET Leader shall liaise with the relevant parties on the exact number of copies they want. The format and content of the report, and the representation of the baseline monitoring data shall be in a format to the satisfaction of EPD and include, but not be limited to the following:

a.    up to half a page executive summary; 

b.    brief project background information; 

c.    drawings showing locations of the baseline monitoring stations; 

d.    monitoring results (in both hard and diskette copies) together with the following information: 

¡      monitoring methodology;

¡      name of laboratory and types of equipment used and calibration details;

¡      parameters monitored;

¡      monitoring locations;

¡      monitoring date, time, frequency and duration;

¡      QA/QC results and detection limits;

e.    details on influencing factors, including

¡      major activities, if any, being carried out on the Site during the period;

¡      weather conditions during the period;

¡      other factors which might affect the results.

f.      determination of the Action and Limit Levels for each monitoring parameter and statistical analysis of the baseline data; the analysis should conclude if there is any significant difference between control and impact stations for the parameters monitored, and the following information should be recorded:

¡      graphical plots of monitored parameters in the month annotated against;

¡      the major activities being carried out on site during the period;

g.    revisions for inclusion in the EM&A Manual; and

h.    comments and conclusions.

12.4          EM&A Reports

The results and findings of all EM&A work required in the Manual shall be recorded in the monthly EM&A reports prepared by the ET Leader.  The EM&A report shall be prepared by the ER, endorsed by IEC and submitted within 10 working days of the end of each reporting month, with the first report due in the month after construction commences.  Before submission of the first EM&A report, the ET Leader shall liaise with the parties on the exact number of copies and format of the monthly reports in both hard copy and electronic medium requirement.  The ET Leader shall review the number and location of monitoring stations and parameters to monitor every 6 months or on as needed basis in order to cater for the changes in surrounding environment and nature of works in progress.

i.          First Monthly EM&A Report

The First Monthly EM&A Report shall include at least the following:

a.    1-2 pages executive summary;

¡      Breaches of Action and Limit levels;

¡      Complaints Log;

¡      Notifications of any summons and successful prosecutions;

¡      Reporting Changes; and

¡      Future key issues.

b.    Basic Project Information

¡      Project organisations including key personnel contact names and telephone numbers;

¡      Programme;

¡      Management structure; and

¡      Works undertaken during the month.

c.    Environmental Status

¡      Work undertaken during the month with illustrations (such as location of works daily dredging/filling rates percentage fines in the fill material used); and

¡      Drawing showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations.

 

d.    Summary of EM&A requirements

¡      All monitoring parameters;

¡      Action and Limit Levels;

¡      Event-Action Plans;

¡      Environmental mitigation measures, as recommended in the project EIA Report; and

¡      Environmental requirements in contract documents.

 

e.    Implementation Status

Advice on the implementation status of environmental protection and pollution control/mitigation measures, as recommended in the project EIA Report, summarised in the updated implementation schedule (in Annex A).

 

f.      Monitoring Results

To provide monitoring results (in both hard and diskette copies) together with the following information:

¡      Monitoring methodology;

¡      Name of laboratory and types of equipment used and calibration details;

¡      Parameters monitored;

¡      Monitoring locations;

¡      Monitoring date, time, frequency, and duration;

¡      Weather conditions during the period;

¡      Any other factors which might affect the monitoring results; and

¡      QA/QC results and detection limits.

 

g.    Report on Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions

¡      Record of all non-compliance (exceedances) of the environmental quality performance limits (Action and Limit Levels);

¡      Record of all complaints received (written or verbal) for each media, including locations and nature of complaints investigation, liaison and consultation undertaken, actions and follow-up procedures taken, results and summary;

¡      Record of all notifications of summons and successful prosecutions for breaches of the current environmental protection/pollution control legislations, including locations and nature of the breaches, investigation, follow-up actions taken, results and summary;

¡      Review of the reasons for and the implications of non-compliance, complaints, summons and prosecutions including review of pollution sources and working procedures; and

¡      Description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance.

 

h.    Others

¡      An account of the future key issues as reviewed from the works programme and work method statements; and

¡      Advice on the solid and liquid waste management status.

ii.         Subsequent Monthly EM&A Reports

The subsequent Monthly EM&A Reports should include the following:

a.    Executive Summary (1-2 pages)

¡      Breaches of Action and Limit levels;

¡      Complaint Log;

¡      Notifications of any summons and successful prosecutions;

¡      Future key issues.

 

b.    Environmental Status

¡      Works undertaken during the month with illustrations including key personnel contact names and telephone number; and

¡      Drawing showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations.

 

c.    Implementation Status

Advice on the implementation status of environmental protection and pollution control/mitigation measures including measures for air, noise, water quality and ecological impacts etc, as recommended in the EIA Report, summarised in the updated implementation schedule (see Annex A).

d.    Monitoring Results

To provide monitoring results (in both hard and diskette copies) together with the following information:

¡      Monitoring methodology;

¡      Name of laboratory and types of equipment used and calibration details;

¡      Parameters monitored;

¡      Monitoring locations;

¡      Monitoring date, time, frequency, and duration;

¡      Weather conditions during the period;

¡      Any other factors which might affect the monitoring results; and

¡      QA/QC results and detection limits.

e.    Report on Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions

¡      Record of all non-compliance (exceedances) of the environmental quality performance limits (Action and Limit Levels);

¡      Record of all complaints received (written or verbal) for each media, including locations and nature of complaints investigation, liaison and consultation undertaken, actions and follow-up procedures taken, results and summary;

¡      Record of all notifications of summons and successful prosecutions for breaches of the current environmental protection/pollution control legislations, including locations and nature of the breaches, investigation, follow-up actions taken, results and summary;

¡      Review of the reasons for and the implications of non-compliance, complaints, summons and prosecutions including review of pollution sources and working procedures; and

¡      A description of the actions taken in the event of non-compliance and deficiency reporting and any follow-up procedures related to earlier non-compliance.

f.      Others

¡      An account of the future key issues as reviewed from the works programme and work method statements; and

¡      Advice on the solid and liquid waste management status.

g.    Appendix

¡      Action and Limit levels

¡      Graphical plots of trends of monitored parameters at key stations over the past four reporting periods for representative monitoring stations annotated against the following:

i) major activities being carried out on site during the period;

ii)     weather conditions during the period; and

iii)    any other factors which might affect the monitoring results

¡      Monitoring schedule for the present and next reporting period

¡      Cumulative statistics

¡      On complaints, notifications of summons and successful prosecutions

¡      Outstanding issues and deficiencies

iii.        Quarterly EM&A Summary Reports

The Quarterly EM&A Summary Report which should generally be around 5 pages (including about 3 of text and tables and 2 of figures) should contain at least the following information: 

a.     up to half a page executive summary; 

b.    basic project information including a synopsis of the project organisation, programme, contacts of key management, and a synopsis of work undertaken during the quarter;

c.    a brief summary of EM&A requirements including: 

¡      monitoring parameters;

¡      environmental quality performance limits (Action and Limit Levels); and

¡      environmental mitigation measures, as recommended in the EIA Report;

d.    advice on the implementation status of environmental protection and pollution control/mitigation measures, as recommended in the project EIA study report, summarised in the updated implementation schedule;

e.    drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;

f.      graphical plots of the trends of monitored parameters over the past 4 months (the last month of the previous quarter and the present quarter) for representative monitoring stations annotated against; 

¡      the major activities being carried out on site during the period;

¡      weather conditions during the period; and

¡      any other factors which might affect the monitoring results;

g.    advice on the solid and liquid waste management status; 

h.    a summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit Levels);

i.      an quarterly assessment of constructional impacts on water quality at the project site including but not limited to comparison of the difference between the quarterly mean and 1.3 times of the ambient which is defined as 30% increase of the baseline data or EPD data of the related parameters by using appropriate statistical procedures.  Suggestion of appropriate mitigation measures if the quarterly assessment analytical results demonstrate that the quarterly mean is significantly higher than the liaison water quality times of the ambient mean (p < 0.05);

j.      a brief review of the reasons for and the implications of non-compliance including review of pollution sources and working procedures;

k.    a summary description of the actions taken in the event of non-compliance and any follow-up procedures related to earlier non-compliance;

l.      a summary record of all complaints received (written or verbal) for each media, liaison and consultation undertaken, actions and follow-up procedures taken;

m.  comments (e.g. effectiveness and efficiency of the mitigation measures), recommendations (e.g. any improvement in the EM&A programme) and conclusions for the quarter; and

n.    proponents' contacts and any hotline telephone number for the public to make enquiries.

iv.        Final EM&A Review Reports

The Final EM&A Report shall contain at least the following information:

a.    Executive Summary (1-2 pages); 

b.    drawings showing the project area, any environmental sensitive receivers and the locations of the monitoring and control stations;

c.    basic project information including a synopsis of the project organisation contacts of key management, and a synopsis of work undertaken during the course of the project or past twelve months; 

d.    a brief summary of EM&A requirements including:

(i)  environmental mitigation measures, as recommended in the project EIA Report;

(ii)      environmental impact hypotheses tested;

(iii)     Action and Limit Levels;

(iv)      all monitoring parameters; and

(v)      Event-Action Plans;

e.    a summary of the implementation status of environmental protection and pollution control/mitigation measures as recommended in the project EIA study report summarized in the updated implementation schedule; 

f.      graphical plots and the statistical analysis of the trends of monitored parameters over the course of the project, including the post project monitoring (for the past twelve months for annual report) for all monitoring stations against: 

¡      the major activities being carried out on site during the period;

¡      weather conditions during the period; and

¡      any other factors which might affect the monitoring results; 

g.    a summary of non-compliance (exceedances) of the environmental quality performance limits (Action and Limit Levels); 

h.    a review of the reasons for and the implications of non-compliance including review of pollution sources and working procedures as appropriate; 

i.      a description of the actions taken in the event of non-compliance; 

j.      a summary record of all complaints received (written or verbal) for each media liaison and consultation undertaken, action and follow-up procedures taken; 

k.    a summary record of notifications of summons and successful prosecutions for breaches of the current environmental protection pollution control legislations locations and nature of the breaches, investigation, follow-up actions taken and results; 

l.      a review of the validity of EIA Report predictions and identification of shortcomings in EIA Report recommendations;

m.  a review of the effectiveness and efficiency of the mitigation measures; and

n.    a review of success of the EM&A programme to cost effectively identify deterioration and to initiate prompt effective mitigatory action when necessary.

12.5          Data Keeping

The site document such as the monitoring field records, laboratory analysis records, site inspection forms, etc. are not required to be included in the monthly EM&A reports for submission.  However, the document shall be well kept by the ET Leader and be ready for inspection upon request.  All relevant information shall be clearly and systematically recorded in the document.  The monitoring data should also be recorded in magnetic media form, and the software copy can be available upon request.  The water quality data software format shall be agreed with EPD.  All the documents and data shall be kept for at least one year after completion of the construction contract.

12.6          Interim Notifications of Environmental Quality Limit Exceedances

With reference to Event and Action Plans in Tables 2.3 and 2.4, when the environmental quality limits are exceeded, the ET Leader shall immediately notify the ER and EPD, as appropriate.  The notification shall be followed up with advice to EPD on the results of the investigation, proposed action and success of the action taken, with any necessary follow-up proposals.  A sample template for the interim notifications is shown in Annex D.