Content

Chapter Title Page

Executive Summary iv

1. Introduction 1

1.1 Background_ 1

1.2 Project Organization_ 1

1.3 Environmental Status in the Reporting Period_ 1

1.4 Summary of EM&A Requirements_ 2

2. Impact Monitoring Methodology 4

2.1 Introduction_ 4

2.2 Air Quality 4

2.3 Construction Noise_ 7

2.4 Water Quality 8

2.5 Ecology 11

2.6 Landscape and Visual 12

3. Monitoring Results 15

3.1 Impact Monitoring Schedule_ 15

3.2 Results of Impact Monitoring_ 15

4. Ecological Monitoring 21

4.1 Introduction_ 21

4.2 Monitoring of Birds_ 21

4.3 Monitoring of Herpetofauna_ 21

4.4 Monitoring of Mammals_ 21

4.5 Monitoring of Water Quality 21

4.6 Monitoring of Soil Quality 22

4.7 Management Activities_ 22

4.8 Summary 22

5. Landscape and Visual 23

5.1 Site Inspections_ 23

5.2 Construction Phase Audit Summary 23

6. Environmental Site Inspection and Audit 26

6.1 Site Inspection_ 26

6.2 Advice on the Solid and Liquid Waste Management Status_ 26

6.3 Status of Environmental Licenses and Permits_ 26

6.4 Recommended Mitigation Measures_ 27

7. Report on Non-compliance, Complaints, Notifications of Summons and Successful Prosecutions 28

7.1 Record on Non-compliance of Action and Limit Levels_ 28

7.2 Record on Environmental Complaints received_ 29

7.3 Record on Notifications of Summons and Successful Prosecution_ 30

7.4 Review of Reasons for and Implications of Non-compliance, Complaints, Summons and Prosecutions_ 30

7.5 Follow-up Actions Taken_ 31

7.6 Cumulative Statistics for Complaints, Notifications of Summons and Successful Prosecutions_ 32

8. Future Key Issues 33

8.1 Site Preparatory Works and Construction Works for the Coming Month_ 33

8.2 Key Issues for the Coming Month_ 33

8.3 Monitoring Schedule for the Coming Month_ 33

8.4 Conclusions and Recommendations_ 35

Tables

Table 1.1:__ Summary of Impact EM&A Monitoring Requirements_ 2

Table 1.2:__ Environmental Monitoring and Audit Schedule for May 2013_ 3

Table 2.1:__ Air Quality Monitoring Parameters, Frequency and Duration_ 4

Table 2.2:__ Air Monitoring Stations_ 4

Table 2.3:__ TSP Monitoring Equipment 5

Table 2.4:__ Noise Monitoring Parameters, Frequency and Duration_ 7

Table 2.5:__ Noise Monitoring Stations_ 7

Table 2.6:__ Noise Monitoring Equipment 8

Table 2.7:__ Water Quality Monitoring Parameters, Frequency and Duration_ 9

Table 2.8:__ Water Quality Monitoring Stations_ 9

Table 2.9:__ Water Quality Monitoring Equipments_ 9

Table 2.10:_ Analytical Methods applied to Water Quality Samples_ 9

Table 2.11:_ Detection Limits for Water Quality Determinants_ 10

Table 2.12:_ Summary of Construction Phase Ecological Monitoring for the Wo Shang Wai Wetland Restoration Area (WRA) 11

Table 2.13:_ Construction and Operation Phase Audit Checklist 13

Table 2.14:_ Proposed Construction Phase Mitigation Measures_ 13

Table 2.15:_ Proposed Operation Phase Mitigation Measures_ 14

Table 3.1:__ Summary of 1-hour TSP Monitoring Results_ 15

Table 3.2:__ Summary of 24-hour TSP Monitoring Results_ 16

Table 3.3:__ Summary of Construction Noise Monitoring Results_ 17

Table 3.4:__ Summary of Water Quality Monitoring Results_ 17

Table 4.1:__ Summary of Ecological Monitoring in WRA and Survey Area_ 22

Table 5.1:__ Construction and Operation Phase Audit Summary 23

Table 6.1:__ Summary of Site Inspections and Recommendations_ 26

Table 6.2:__ Status of Environmental Submissions, Licenses and Permits_ 26

Table 7.1:__ Summary of Exceedances in Water Quality 28

Table 7.2:__ Statistics for Complaints, Notifications of Summons and Successful Prosecutions_ 32

Table 8.1:__ Tentative Environmental Monitoring and Audit Schedule for June 2013_ 34

List of Figures

Figure 1.1 General Layout Plan of the Project Site

Figure 2.1 Locations of Air Quality Monitoring Stations

Figure 2.2 Locations of Noise Monitoring Stations

Figure 2.3 Locations of Water Quality Monitoring Stations

Figure 4.1 Survey Area and Transect Walked

List of Appendices

Appendix A Project Organization Chart

Appendix B Tentative Construction Programme

Appendix C Action and Limit Levels for Construction Phase

Appendix D Event and Action Plan for Air Quality, Noise and Water Quality

Appendix E Calibration certificates

Appendix F Graphical plots of the monitoring results

Appendix G Weather conditions during the monitoring period

Appendix H Ecological Monitoring conducted

Appendix I Summary of Bird Surveys conducted

Appendix J Summary of Herpetofauna, Mammal and Insect Surveys conducted

Appendix K Summary of Monitoring of Water Quality associated with Ecological Monitoring conducted

Appendix L Environmental Mitigation Measures - Implementation Status

Executive Summary

Mott MacDonald Hong Kong Ltd. (“MMHK”) has been commissioned by Heng Shung Construction Co. Ltd. (The Contractor) to undertake the Environmental Team (ET) services to carry out environmental monitoring and audit (EM&A) for both pre-construction and construction phases of the Proposed Comprehensive Development at Wo Shang Wai, Yuen Long.

This is the 37^th EM&A report submitted under the Condition 4.5 of Environmental Permit No. EP-311/2008/D. This report summarises the findings on EM&A during the period from 1 to 31 May 2013.

Exceedance of Action and Limit Levels

There was no breach of Action or Limit levels for Air Quality (1-hr TSP and 24-hr TSP) and Noise level (as L_eq) in the reporting month.

During May 2013, Action Level exceedances of pH were observed at MP3, MP5 and MP6, while exceedances of DO, turbidity and/or SS were observed at MP3 to MP6. DO exceedance was observed 13 times at MP3, four times at MP4, four times at MP5 and eight times at MP6. SS and/or turbidity exceedance was recorded on three monitoring dates at MP3, seven monitoring dates at MP4, two monitoring dates at MP5 and four monitoring dates at MP6 during the reporting month.

The summary of measured water quality is presented in Section 3.2.3.

Investigations have been carried out to identify the causes of exceedance. From investigation, the Contractor has implemented water quality mitigation measures as recommended in the EIA report. With external factors affecting the adjacent environments, such as natural variations, pond fish culture activities, rainfall and suspected routine dredging works (unrelated to the Project), the exceedances were considered not due to the project construction works.

Implementation of mitigation measures

Site audits were carried out on 7, 16, 23 and 28 May 2013 to confirm the implementation measures undertaken by the Contractor in the reporting month. The outcomes are presented in Section 6 and the status of implementation of mitigation measures in the site is shown in Appendix L.

Record of Complaints

On 15 May 2013, a complaint was lodged with the Environmental Protection Department (EPD) on ecological and dust impact near Palm Springs, Yuen Long. The complaint was about suspected unmitigated construction activities, which led to impact to wetland ecology and suspected dust emissions from the Wo Shang Wai construction site, which causes air impact to the Palm Springs area. According to the complainant, a long term dust generation from the Wo Shang Wai construction site has caused dust impact to the nearby Narcissus Path and Banyan Path.The complaint was subsequently received by MMHK from the EPD on 24 May 2013. From the investigation conducted into the complaint, air quality and ecological mitigation measures as recommended in the Implementation Schedule of the EM&A Manual have been implemented by Contractor to minimise the air quality nuisance arising from the site activities. Nevertheless, the Contractor is reminded to ensure all proposed mitigation measures recommended in the Implementation Schedule of the EM&A Manual are implemented to reduce any possible environmental impacts.

Record of Notification of summons and successful prosecution

There was no record of Notification of summons and successful prosecution in the reporting month.

Reporting Changes

There was no reporting change in the reporting month.

Future Key Issues

The major site works scheduled to be commissioned in the coming three months include site formation, foundation work, superstructure and pond drainage management in the Wetland Restoration Area (to lower the water level and remove unwanted species in the pond). Potential environmental impacts due to the construction activities, including air quality, noise, water quality, ecology and landscape and visual, will be monitored.

Environmental mitigation measures will be implemented on site as recommended and weekly site audits will be carried out to ensure that the environmental conditions are acceptable.

1. Introduction

1.1 Background

In March 2005, the Project Proponent, Profit Point Enterprises Limited, acquired the development site at Wo Shang Wai in Yuen Long. An Environmental Impact Assessment (EIA) was then carried out and approved under the EIA Ordinance (EIAO), and the Environmental Permit (EP-311/2008) for construction of the comprehensive development in Wo Shang Wai was first granted by EPD on 9 September 2008 and has been subsequently varied, with the current version (EP-311/2008/D) issued by EPD on 20 March 2013.

The Project involves the residential development and associated infrastructure and wetland restoration area and linear landscape area. The construction works under the Environmental Permit commenced on 12 May 2010. The site formation construction works of the Wetland Restoration Area (hereafter WRA) were completed on 15 November 2010, while the 30-month establishment period of the WRA was concluded in August 2012 – this indicated that planting works as scheduled in the approved Wetland Restoration and Creation Scheme (WRCS; Nov 2009) was complete, except along the western and southern boundary where the planting is affected by the existing site boundary and noise barrier, and for which a Variation to Environmental Permit (EP-311/2008/C) to defer planting at the location was approved. The current valid EP (EP-311/2008/D) includes specific mitigation measures to minimise certain identified noise impacts during the operation phase.

Mott MacDonald Hong Kong Ltd. (“MMHK”) has been commissioned by the Contractor, Heng Shung Construction Co. Ltd., to undertake the Environmental Team (ET) services to carry out environmental monitoring and audit (EM&A) for both pre-construction and construction phases of the Proposed Comprehensive Development at Wo Shang Wai, Yuen Long.

According to the EP Condition 4.5, the monthly EM&A Report shall be submitted to the Director within two weeks after the end of the reporting month. This report summarises the findings during the period from 1 May to 31 May 2013.

1.2 Project Organization

The organization chart and lines of communication with respect to the on-site environmental management structure together with the contact information of the key personnel are shown in Appendix A.

1.3 Environmental Status in the Reporting Period

During the reporting period, construction works of the Project undertaken included:

¡ Site formation

¡ Foundation Work

¡ Pond drainage management in the Wetland Restoration Area (to lower the water level and remove unwanted species in the pond)

The Construction Works Programme of the Project is provided in Appendix B. The general layout plan of the Project site is shown in Figure 1.1.

1.4 Summary of EM&A Requirements

The EM&A programme requires environmental monitoring of air quality, noise, water quality, ecology and landscape and visual as specified in the approved EM&A Manual.

A summary of impact EM&A requirements is presented in Table 1.1:

Table 1.1: Summary of Impact EM&A Monitoring Requirements

Parameters	Descriptions	Locations	Frequencies
Air Quality	24-Hour TSP	ASR1, ASR2A, ASR3, ASR4	Once every 6 days
	1-Hour TSP	ASR1, ASR2A, ASR3, ASR4	3 times every 6 days
Noise	Leq, 30min	NSR1, NSR3, NSR5, NSR7	Weekly
Water Quality	Dissolved Oxygen (DO), temperature, pH, suspended solids (SS) and Biological Oxygen Demand (BOD)	MP1 to MP6	3 days per week
Ecology	Birds	Within the Project Area and Assessment Area of 500m	Weekly
	Dragonflies and Butterflies	Within the Project Area and Assessment Area of 500m	Once per month during Mar and Sep to Nov, and twice per month during Apr to Aug
	Herpetofauna	Within the Project Area and Assessment Area of 500m	Once per month during Apr to Nov
	Water quality of Wetland Restoration Area (WRA)	Wetland Restoration Area	After filling of WRA with water, monthly for in situ water quality and every six months (end of wet season and end of dry season) for laboratory testing
	Site Inspections	Within the Project Area and Assessment Area of 500m	Weekly
Landscape and Visual	Auditing of protection of existing trees, the transplanting of existing trees, the creation of new wetland, the planting of new trees and shrubs and other landscape and visual mitigation measures	CM1 to CM10 and OM1 to OM7 within the Project Area	Site inspections once every two weeks during construction phase; once every two months during operational phase

The Environmental Quality Performance Limits for air quality, noise and water quality are shown in Appendix C.

The Event and Action Plan for air quality, noise and water quality are shown in Appendix D.

The monitoring schedule for the reporting month is shown in Table 1.2 below:

Table 1.2: Environmental Monitoring and Audit Schedule for May 2013

2. Impact Monitoring Methodology

2.1 Introduction

For air quality, construction noise and water quality, ecology, landscape and visual monitoring methodology, including the monitoring locations, monitoring equipments used, monitoring parameters, and frequency and duration etc., are detailed in this Chapter.

2.2 Air Quality

2.2.1 Monitoring Parameters, Frequency and Duration

In accordance with the EM&A Manual, 1-hour and 24-hour TSP levels monitoring are to be conducted during the construction phase. Table 2.1 summarizes the monitoring parameters, frequency and duration of air quality monitoring.

Table 2.1: Air Quality Monitoring Parameters, Frequency and Duration

Monitoring Stations	Parameter	Frequency and Duration
ASR1, ASR2A, ASR3 & ASR4	24-hour TSP	At least once in every six-days
	1-hour TSP	3 times every six-days

2.2.2 Monitoring Locations

The four air quality monitoring stations were established in the EM&A manual and were slightly adjusted during the baseline monitoring phase. Locations of the agreed air quality monitoring stations are listed in Table 2.2 and as shown in Figure 2.1.

Table 2.2: Air Monitoring Stations

Monitoring Stations	Locations
ASR1	Works Site Boundary
ASR2A	At the rooftop of refuse collection point, which is located at the southwest of the project area
ASR3	At the commercial centre at Palm Springs, which is located at the south of the project area
ASR4	Works Site Boundary

2.2.3 Monitoring Equipments

Continuous 24-hour TSP air quality monitoring is conducted using High Volume Sampler (HVS) (Model: GMWS-2310 Accu-vol). The HVS meets all the requirements of the EM&A Manual. Portable direct reading dust meters were used to carry out the 1-hour TSP monitoring. Table 2.3 summarizes the equipment used in the impact air quality monitoring.

Table 2.3: TSP Monitoring Equipment

Equipment	Model
24-hr TSP monitoring
High Volume Sampler	GMWS 2310 Accu-vol
Calibrator	GMW 25
1-hr TSP monitoring
Portable direct reading dust meter	AM510 SidePak Personal Aerosol Monitor Dust Trak 8520 & 8532

2.2.4 Monitoring Methodology

24-hour TSP Monitoring

Installation

The HVS was installed in the vicinity of the air sensitive receiver. The following criteria were considered in the installation of the HVS.

· A horizontal platform with appropriate support to secure the sampler against gusty wind was provided.

· The distance between the HVS and any obstacles, such as buildings, was at least twice the height that the obstacle protrudes above the HVS.

· A minimum of two metres separation from walls, parapets and penthouse was required for rooftop sampler.

· A minimum of two metres separation from any supporting structure, measured horizontally was required.

· No furnace or incinerator flues or building vent were nearby.

· Airflow around the sampler was unrestricted.

· The sampler has been more than 20 metres from any drip line.

· Permission was obtained to set up the samplers and to obtain access to the monitoring stations.

· A secured supply of electricity is needed to operate the samplers.

Preparation of Filter Papers

· Glass fibre filters, were labelled and sufficient filters that were clean and without pinholes were selected.

· All filters were equilibrated in the conditioning environment for 24 hours before weighing. The conditioning environment temperature was around 25 °C and not variable by more than ±3 °C with relative humidity (RH) < 50 % and was not variable by more than ±5 %. A convenient working RH was 40 %.

Field Monitoring

· The power supply was checked to ensure the HVS works properly.

· The filter holder and the area surrounding the filter were cleaned.

· The filter holder was removed by loosening the four bolts and a new filter, with stamped number upward, on a supporting screen was aligned carefully.

· The filter was properly aligned on the screen so that the gasket formed an airtight seal on the outer edges of the filter.

· The swing bolts were fastened to hold the filter holder down to the frame. The pressure applied should be sufficient to avoid air leakage at the edges.

· The shelter lid was closed and was secured with the aluminium strip.

· The HVS was warmed-up for about 5 minutes to establish run-temperature conditions.

· A new flow rate record sheet was set into the flow recorder.

· The flow rate of the HVS was checked and adjusted at around 1.1 m³/min. The range specified in the EM&A Manual was between 0.6-1.7 m³/min.

· The programmable timer was set for a sampling period of 24 hrs + 1 hr, and the starting time, weather condition and the filter number were recorded.

· The initial elapsed time was recorded.

· At the end of sampling, the sampled filter was removed carefully and folded in half length so that only surfaces with collected particulate matter were in contact.

· It was then placed in a clean plastic envelope and sealed.

· All monitoring information was recorded on a standard data sheet.

· Filters were sent to a HOKLAS accredited laboratory for analysis.

Maintenance and Calibration

· The HVS and its accessories are maintained in good working condition, such as replacing motor brushes routinely and checking electrical wiring to ensure a continuous power supply.

· HVSs were calibrated at two-month intervals.

· Calibration records for HVSs are shown in Appendix E.

1-hour TSP Monitoring

Field Monitoring

The measuring procedures of the 1-hour dust meter are in accordance with the Manufacturer’s Instruction Manual as follows:

· Set POWER to “ON”, push BATTERY button, make sure that the meter’s indicator is in the range with a red line and allow the instrument to stand for about 3 minutes (Then, the air sampling inlet has been capped).

· Push the knob at MEASURE position.

· Push “O-ADJ” button. (Then meter’s indication is 0).

· Push the knob at SENSI ADJ position and set the meter’s indication to S value described on the Test Report using the trimmer for SENSI ADJ.

· Pull out the knob and return it to MEASURE position.

· Push “START” button.

Maintenance and Calibration

· The 1-hour dust meter would be checked at 3-month intervals and calibrated at 1-year intervals throughout all stages of the air quality monitoring.

· Calibration records for direct dust meters are shown in Appendix E.

2.3 Construction Noise

2.3.1 Monitoring Parameters, Frequency and Duration

Following the requirements in the EM&A Manual for noise, noise monitoring has to be carried out during the construction phase. Continuous noise monitoring for the A-weighted levels L_eq, L₁₀ and L₉₀ is undertaken once per every week.

Table 2.4 summarizes the monitoring parameters, frequency and duration of air quality monitoring.

Table 2.4: Noise Monitoring Parameters, Frequency and Duration

Monitoring Stations	Parameter	Frequency and Duration
NSR1, NSR3, NSR5, NSR7	Leq, L90 & L10	Once every week

2.3.2 Monitoring Locations

The four noise quality monitoring stations were established in the EM&A manual and were slightly adjusted during the baseline monitoring phase. Locations of the agreed noise quality monitoring stations are listed in Table 2.5 and as shown in Figure 2.2.

Table 2.5: Noise Monitoring Stations

Monitoring Stations	Locations	Type of measurement
NSR1	Noise monitoring equipment was set up near the boundary wall at Palm Springs.	Free-field
NSR3	The monitoring station was located next to the guard house at Palm Springs.	Facade
NSR5	The monitoring station was located within the work site boundary.	Free-field
NSR7	The monitoring station was located near the boundary wall of the house of Mai Po San Tsuen.	Free-field

2.3.3 Monitoring Equipments

Integrating Sound Level Meter will be used for noise monitoring. It is a Type 1 sound level meter capable of giving a continuous readout of the noise level readings including equivalent continuous sound pressure level (L_eq) and percentile sound pressure level (L_x). They comply with International Electrotechnical Commission Publications 651:1979 (Type 1) and 804:1985 (Type 1). Table 2.6 summarizes the noise monitoring equipment model being used.

Table 2.6: Noise Monitoring Equipment

Monitoring Stations	Equipment Model
	Integrating Sound Level Meter	Calibrator
NSR1	Rion NL-52	Rion NC-73
NSR3
NSR5
NSR7

2.3.4 Monitoring Methodology

Field Monitoring

· The Sound Level Meter was set on a tripod at a height of at least 1.2 m above the ground.

· Façade and free-field measurements were made at the monitoring locations.

· The battery condition was checked to ensure the correct functioning of the meter.

· Parameters such as frequency weighting, the time weighting and the measurement time were set as follows:

- frequency weighting: A

- time weighting: Fast

- time measurement: 30 minutes intervals (between 07:00 and 19:00)

· Prior to and after each noise measurement, the meter was calibrated using a Calibrator for 94 dB at 1 kHz. If the difference in the calibration level before and after measurement was more than 1 dB, the measurement would be considered invalid has to be repeated after re-calibration or repair of the equipment.

· During the monitoring period, the L_eq, L₁₀ and L₉₀ were recorded. In addition, any site observations and noise sources were recorded on a standard record sheet.

Maintenance and Calibration

· The microphone head of the sound level meter and calibrator is cleaned with soft cloth at quarterly intervals.

· The meter and calibrator are sent to the supplier or HOKLAS laboratory to check and calibrate at yearly intervals.

· Calibration records are shown in Appendix E.

2.4 Water Quality

2.4.1 Monitoring Parameters, Frequency and Duration

In accordance with the requirements in the EM&A Manual for water quality, water quality parameters including Dissolved Oxygen (DO), temperature, pH, turbidity, suspended solids (SS) and Biochemical Oxygen Demand (BOD) have to be monitored at designated monitoring stations during construction of the Project. DO, temperature and pH were measured in-situ whereas SS and BOD were analysed in a laboratory. The measurements should be taken at all designated monitoring stations, three days per week. The interval between any two sets of monitoring was not less than 36 hours. Table 2.7 summarizes the monitoring parameters, frequency and duration of water quality monitoring.

Table 2.7: Water Quality Monitoring Parameters, Frequency and Duration

Monitoring Stations	Parameter	Frequency and Duration
MP1, MP2, MP3, MP4, MP5 & MP6	DO, temperature, pH, SS, turbidity, BOD	Three days every week

2.4.2 Monitoring Locations

The six water quality monitoring stations were established in the EM&A manual. Locations of the agreed water quality monitoring stations are listed in Table 2.8 and as shown in Figure 2.3.

Table 2.8: Water Quality Monitoring Stations

Monitoring Stations	Easting	Northing
MP1	838 730.50	822 862.25
MP2	838 933.26	823 247.41
MP3	839 107.17	823 596.84
MP4	839 286.14	823 638.55
MP5	839 134.35	823 722.99
MP6	839 063.02	823 842.25

2.4.3 Monitoring Equipment

The Water Quality Monitoring Equipments and Analytical Methods applied to Water Quality Samples are given in Table 2.9 and Table 2.10 respectively. Details of which are discussed below.

Table 2.9: Water Quality Monitoring Equipments

Equipment	Model	Equipment/Serial Number
Conductivity, Dissolved oxygen, pH, Salinity and Temperature Measuring Meter	YSI Professional Plus	09K100735
Turbidity Meter	Hach 2100Q	09120C000514, 12010C015757
Global Positioning System (GPS)	Garmin eTrex Vista	ENO 007

Table 2.10: Analytical Methods applied to Water Quality Samples

Determinant, unit	Standard Method
Total Suspended Solids, mg/L	In house method based on APHA 2540D; ALS Method Code: EA-025
Biochemical Oxygen Demand (BOD), mg/L	In house method based on APHA 5210B; ALS Method Code: EP-030

All in-situ monitoring instruments were checked, calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme before use.

Dissolved Oxygen (DO), temperature and pH measuring equipment

A portable, weatherproof multiparameter instrument (YSI Professional Plus) was used in the monitoring. It can be capable for measuring dissolved oxygen (DO), pH, and temperature simultaneously with the following limits:

· a dissolved oxygen level in the range of 0-50 mg/L and 0-500 % saturation;

· a temperature of -5 to 45 degree Celsius; and

· pH value of 0-14 with 0.1 as the base unit.

Turbidity Measurement Instrument

Portable and weatherproof turbidity meter (HACH model 2100Q) was used during impact monitoring. It has a photoelectric sensor capable of measuring turbidity between 0-1000 NTU. Response of the sensor was checked with certified standard turbidity solutions before the start of measurement.

Global Positioning System

A hand-held GPS navigator (Garmin eTrex Vista) was used to identify the designated monitoring stations prior to water sampling.

Suspended Solids and BOD Measurements (Sample Containers and Storage)

Water samples for SS analysis were stored in high density polythene bottles with no preservative added, packed in ice (cooled to 4^oC without being frozen), delivered to the laboratory, and analysed as soon as possible after collection. Analysis was carried out in a HOKLAS accredited laboratory.

Detection Limit

The limits of detection for the in-situ and laboratory measurements are shown in Table 2.11.

Table 2.11: Detection Limits for Water Quality Determinants

Determinant	Limit of Detection
Dissolved Oxygen	0.1 mg/L
Temperature	0.1 degree Celsius
pH	0.01 unit
Turbidity	0.1 NTU
Suspended Solids	1 mg/L
BOD	2 mg/L

2.4.4 Monitoring Methodology

In situ measurement

All pH meters, DO/temperature meters had been checked and calibrated prior to use. Standard buffer solution of at least two pH levels (either pH 4 and pH 7, or pH 7 and pH 10) had been used for calibration of the instrument before and after use.

DO meters had been calibrated by a laboratory accredited under HOKLAS or any other international accreditation scheme, and subsequently re-calibrated at three-monthly intervals throughout all stages of the water quality monitoring. Responses of sensors and electrodes had been checked with certified standard solutions before each use. Wet bulb calibrations for all DO meters had been carried out before measurement at each monitoring location. For the on site calibration of field equipment, BS 127:1993, "Guide to field and on-site test methods for the analysis of waters" had been observed.

Measurements shall be at three water depths, namely, 1m below water surface, mid-depth and 1m above stream bed/pond bed, except where the water depth less that 6m, the mid-depth station maybe omitted. Should the water depth be less than 3m, only the mid-depth station will be monitored.

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

Water Samples Preparation and Analysis

For collection of water sampling within the water courses, a 500ml clean plastic beaker was used. After collection, the water samples were stored in high-density polythene bottles. The sample container was rinsed with a portion of the water sample. The water sample was then transferred to the container, labelled with a unique sample ID and sealed with a screw cap. The water samples were stored in a cool box maintained at 4^oC. The water samples were then delivered to a local HOKLAS-accredited laboratory (ALS) on the same day for analysis.

The testing methods of testing parameters as recommended by EIA or required by EPD, with the QA/QC results are in accordance with the requirement of HOKLAS or international accredited scheme.

The calibration certificates for equipments used for in-situ monitoring of water quality are attached in Appendix E.

2.5 Ecology

2.5.1 Monitoring Parameters, Frequency and Duration

Target species and certain other fauna will be monitored within the Project Area and Assessment Area during the wetland and residential construction phase. This will be important to ensure that any unexpected events or impacts either on- or off-site are quickly identified so that remedial action can be taken. The groups to be monitored and frequency of monitoring are shown in Table 2.12.

Table 2.12: Summary of Construction Phase Ecological Monitoring for the Wo Shang Wai Wetland Restoration Area (WRA)

Species / Parameter	Construction Phase Ecological Monitoring
Birds	Weekly (including Assessment Area).
Dragonflies and Butterflies	Once per month during March and September to November, and twice per month during April to August.
Herpetofauna	Once per month during April to November.
Water Quality	After filling of WRA with water, monthly for in situ water quality and every six months (end of the wet season and end of the dry season) for laboratory testing.
Site Inspections	Weekly.

2.5.2 Monitoring Locations and Methodology

Ecological monitoring locations during construction phase are shown in Figure 4.1 and the methodology for ecological monitoring is detailed in Section 4.

2.6 Landscape and Visual

2.6.1 Monitoring Parameters, Frequency and Duration

All measures undertaken by both the Contractor and the specialist Landscape Sub-Contractor during the construction phase and first year of the operational phase shall be audited by a Registered Landscape Architect, as a member of the ET, on a regular basis to ensure compliance with the intended aims of the measures. Site inspections should be undertaken at least once every two weeks throughout the construction period and once every two months during the operational phase.

The broad scope of audit is detailed below but should also be undertaken with reference to the more specific checklist provided in Table 2.13 below. Operational phase auditing will be restricted to the last 12 months of the establishment works of the landscaping proposals and thus only the items below concerning this period are relevant to the operational phase.

· The extent of the agreed works area should be regularly checked during the construction phase. Any trespass by the Contractor outside the limit of the works, including any damage to existing trees and woodland shall be noted;

· The progress of the engineering works should be regularly reviewed on site to identify the earliest practical opportunities for the landscape works to be undertaken;

· All existing vegetation, streams and other features within the study area which are not directly affected by the works are retained and protected;

· The methods of protecting existing vegetation proposed by the Contractor are acceptable and enforced;

· Preparation, lifting transport and re-planting operations for any transplanted trees;

· The layout, design and construction of buildings conforms to requirements specified in the EIA report;

· All landscaping works are carried out in accordance with the EIA recommendations and with specifications;

· The planting of new trees, shrubs, groundcover, climbers, grasses and other plans, together with the replanting of any transplanted trees are carried out properly and within the right season;

· All necessary horticultural operations and replacement planting are undertaken throughout the Establishment Period to ensure the healthy establishment and growth of both transplanted trees and all newly establishment plants.

Table 2.13: Construction and Operation Phase Audit Checklist

Area of Works	Items to be Monitored
Works Area	Check the extent of the Works to ensure that the Works Area is not exceeded
Protection of all trees and woodland blocks to be retained	Identification and demarcation of trees / vegetation to be retained, erection of physical protection (e.g. fencing), monitoring against possible incursion, physical damage, fire, pollution, surface erosion, etc.
Streams	Ensure no run-off into existing streams
Clearance of existing vegetation	Identification and demarcation of trees / vegetation to be cleared, checking of extent of works to minimize damage, monitoring of adjacent areas against possible incursion, physical damage, fire, pollution, surface erosion, etc.
Transplanting of trees	Identification and demarcation of trees / vegetation to be transplanted, monitoring of extent of pruning / lifting works to minimize damage, timing of operations implementation of all stages of preparatory and translocation works, and maintenance of transplanted vegetation, etc.
Topsoil stripping	Ensuring existing topsoil is stripped and stored under recognized good practice and is hydroseeded and regularly turned to prevent anaerobic conditions
New buildings	Ensure that building finishes accord with mitigation proposals with regard to colour and albedo.
Boundaries	Ensuring hoarding are erected as required
Noise Barrier	Ensure noise barrier design accords with the mitigation proposals with regard to location, materials and finishes.
Night-time lighting	Ensuring night-time lighting is directional, hooded and shielded away from VSRs
Plant supply	Monitoring of operations relating to the supply of specialist plant material (including the collecting, germination and growth of plants from seed) to ensure that plants will be available in time to be used within the construction works.
Landscape and wetland treatments generally	Check that wetland, and hard / soft landscape designs conform to intent of mitigation measures and agreed designs
Soiling, planting, etc.	Monitoring of implementation and maintenance of soiling and planting works against possible incursion, physical damage, fire, pollution, surface erosion, etc.
Establishment Works	Monitoring of implementation of maintenance operation during Establishment Period

2.6.2 Monitoring Locations

The monitoring locations should check against the mitigation measures proposed under the approved Environmental Impact Assessment, which are summarised as follows:

Table 2.14: Proposed Construction Phase Mitigation Measures

ID No.	Landscape and Visual Mitigation Measure
CM1	The construction area and contractor’s temporary works areas should be minimised to avoid impacts on adjacent landscape.
CM2	Screening of construction works by hoardings/noise barriers around Works area in visually unobtrusive colours, to screen Works.
CM3	Reduction of construction period to practical minimum.
CM4	Topsoil, where identified, should be stripped and stored for re-use in the construction of the soft landscape works, where the soil material meets acceptable criteria and where practical. The Contract Specification shall include storage and reuse of topsoil as appropriate.
CM5	Hydroseeding or sheeting of soil stockpiles with visually unobtrusive material (in earth tone).
CM6	Advance screen planting to noise barriers.
CM7	Control night-time lighting and glare by hooding all lights.
CM8	Ensure no run-off into streams adjacent to Project Area.
CM9	Protection of existing trees on boundary of project area shall be carefully protected during construction. Detailed Tree Protection Specification shall be provided in the Contract Specification. Under this specification, the Contractor shall be required to submit, for approval, a detailed working method statement for the protection of trees prior to undertaking any works adjacent to all retained trees, including trees in contractor’s works areas. (Tree protection measures will be detailed at S16 and Tree Removal Application stage).
CM10	Trees unavoidably affected by the works shall be transplanted where practical. Trees should be transplanted straight to their destinations and not held in a nursery. A detailed Tree Transplanting Specification shall be provided in the Contract Specification, if applicable. Sufficient time for necessary tree root and crown preparation periods shall be allowed in the project programme.

Table 2.15: Proposed Operation Phase Mitigation Measures

ID No.	Landscape Mitigation Measure
OM1	Compensatory Tree Planting for all felled trees shall be provided to the satisfaction of relevant Government departments. Required numbers and locations of compensatory trees shall be determined and agreed separately with Government during the Tree Felling Application process under ETWBTC 3/2006.
OM2	A continuous belt of screen planting along southern perimeter of project area with fast growing tree species. At least 450 trees capable of reaching a height > 10m within 10 years should be planted. Planting of the belt of trees shall be carried out as advance works ahead of other site formation and building works.
OM3	Maximise soft landscape and amenity water bodies in residential areas of the development. Approximately 750 trees (of Heavy Standard size) should be planted. Where space permits, roadside berms should be created. Street trees should be of species that reach a mature height of no less than 15m.
OM4	Maximise freshwater habitat wetland creation consistent with achieving other parameters. Minimum 4.74 ha to be provided. Wetlands must have natural edge profiles with >1m wide emergent zone. No access to the wetland by residents and all wetlands must be screened from residential development by a continuous tree screen at interface with residential development or earth mounding such that disturbance is minimised. Implementation of the wetland shall be carried out as advance works.
OM5	Use appropriate (visually unobtrusive and non-reflective) building materials and colours in built structures.
OM6	During detailed design, refine building layout to create a min. 10m wide gap between buildings north of Wo Shang Wai pond and also two min. 10m wide gaps in the row of buildings adjacent to Royal Palms.
OM7	Streetscape elements (e.g. paving, signage, street furniture, lighting etc.) shall be sensitively designed in a manner that responds to the local context, and minimises potential negative landscape and visual impacts. Lighting units should be directional and minimise unnecessary light spill.

3. Monitoring Results

3.1 Impact Monitoring Schedule

Impact monitoring for air quality (dust), noise and water quality due to the construction work were undertaken during the reporting month in compliance with the EM&A manual in the reporting period. Regular site inspections were carried out on 2, 9, 16, 23 and 29 May 2013 in the reporting month to assess the compliance with environmental requirements.

3.2 Results of Impact Monitoring

3.2.1 Air Quality Monitoring

3.2.1.1 1-hr TSP

Results of 1-hour TSP at the four monitoring locations are summarised in Table 3.1. Graphical plots of the monitoring results are shown in Appendix F. The weather conditions in the reporting period are provided in Appendix G.

Table 3.1: Summary of 1-hour TSP Monitoring Results

Monitoring Date	Start Time	1-hr TSP (μg/m^3)			Range (μg/m^3)	Action Level (μg/m^3)	Limit Level (μg/m^3)
		1^st Result	2^nd Result	3^rd Result
ASR1
06-May-13	13:15	85	74	68	68-110	378		500
10-May-13	13:26	110	84	94
16-May-13	13:23	84	90	72
22-May-13	14:08	94	86	74
28-May-13	13:10	74	91	83
ASR2A
06-May-13	12:46	74	65	83	65-102	357		500
10-May-13	12:53	84	96	102
16-May-13	12:50	86	94	76
22-May-13	13:39	74	80	91
28-May-13	12:47	83	74	90
ASR3
06-May-13	12:32	89	92	74	65-104	358		500
10-May-13	12:33	94	100	88
16-May-13	12:37	92	104	88
22-May-13	13:18	84	93	74
28-May-13	12:34	72	65	80
ASR4
06-May-13	13:11	104	96	83	83-113	372		500
10-May-13	13:16	113	105	96
16-May-13	13:18	106	93	84
22-May-13	13:59	102	96	88
28-May-13	13:03	105	93	112

3.2.1.2 24-hr TSP

Results of 24-hour TSP at the four monitoring locations are summarised in Table 3.2. Graphical plots of the monitoring results are shown in Appendix F. The weather conditions in the reporting period are provided in Appendix G.

Table 3.2: Summary of 24-hour TSP Monitoring Results

Monitoring Date	Monitoring Results (μg/m^3)	Range (μg/m^3)	Action Level (μg/m^3)	Limit Level (μg/m^3)
ASR1
06-May-13	88	82-98	226	260
10-May-13	98
16-May-13	86
22-May-13	82
28-May-13	91
ASR2A
06-May-13	83	75-90	213	260
10-May-13	90
16-May-13	75
22-May-13	82
28-May-13	82
ASR3
06-May-13	87	74-96	205	260
10-May-13	96
16-May-13	80
22-May-13	74
28-May-13	93
ASR4
06-May-13	96	76-98	237	260
10-May-13	98
16-May-13	82
22-May-13	76
28-May-13	90

No exceedance of 1-hour and 24-hour TSP (Action or Limit Level) was recorded in the reporting period.

3.2.2 Construction Noise Monitoring

The construction noise monitoring results are summarized in Table 3.3. Graphical plots of the monitoring data are shown in Appendix F. The weather conditions in the reporting period are provided in Appendix G.

Table 3.3: Summary of Construction Noise Monitoring Results

Monitoring Date	Start Time	Mean & Range of Noise Levels, dB(A)			Limit Level for Leq (dB)
		Leq	L10	L90
NSR1					> 75
06-May-13	15:59	57	58	46
16-May-13	15:06	56	58	53
22-May-13	15:59	56	59	51
28-May-13	15:27	54	60	43
NSR3
06-May-13	15:19	57	58	44
16-May-13	15:50	58	61	49
22-May-13	16:39	56	57	49
28-May-13	14:47	55	57	53
NSR5
06-May-13	13:22	59	61	56
16-May-13	13:29	58	60	54
22-May-13	14:15	57	58	54
28-May-13	13:19	57	61	51
NSR7
06-May-13	14:34	64	67	60
16-May-13	14:18	65	68	60
22-May-13	15:10	61	64	58
28-May-13	14:02	67	70	64

No exceedance (Action/Limit Level) of construction noise was recorded in the reporting period.

3.2.3 Water Quality Monitoring

The water quality monitoring results are summarized in Table 3.4. Graphical plots of the monitoring data are shown in Appendix F. The weather conditions in the reporting period are provided in Appendix G.

Table 3.4: Summary of Water Quality Monitoring Results

Monitoring Date	Temp (^oC)	pH	Dissolved Oxygen (DO) (mg/L)	DO (%)	Turbidity (NT)	BOD (mg/L) ^(1)	Suspended Solids (mg/L)
MP3
02/05/2013	22.6	7.3	3.6	41.2	66.2	5	62
04/05/2013	22.9	7.3	7.6	88.2	17.9	6	17.5
06/05/2013	24.4	7.3	6.4	75.9	30.0	83.5	30
08/05/2013	24.5	7.4	3.4	41.1	50.7	6.5	48
10/05/2013	26.8	7.3	3.8	48.1	41.3	6.5	35.5
13/05/2013	28.3	7.3	4.3	54.2	30.9	9	30
15/05/2013	28.7	7.3	4.0	51.2	32.7	8	29
18/05/2013	28.4	7.3	4.8	61.9	54.6	21	54
20/05/2013	28.1	7.3	4.7	59.6	49.4	11.5	52
22/05/2013	24.8	7.3	5.8	66.9	48.9	7	41.5
24/05/2013	30.1	7.3	4.4	55.9	79.5	8	81.5
27/05/2013	28.5	7.3	5.0	65.2	60.2	9	57.5
29/05/2013	29.5	7.8	6.1	70.8	53.6	8	42
31/05/2013	29.8	7.5	6.0	79.5	65.0	6	101
Action Level	-	<5.5 or >7.5	<6.85	-	>64	-	>65
Limit Level	-	<4.0 or >8.0	<6.65	-	>67	-	>66
MP4
02/05/2013	20.7	7.5	3.7	40.8	14.9	5	15.5
04/05/2013	22.0	7.5	6.2	69.8	34.9	4.5	37.5
06/05/2013	23.8	7.4	3.4	39.8	17.0	3	15.5
08/05/2013	23.8	7.4	3.5	40.9	15.4	7.5	31
10/05/2013	26.7	7.5	4.1	51.3	27.3	7	23
13/05/2013	26.9	7.4	3.7	46.8	33.0	5.5	29.5
15/05/2013	28.1	7.4	4.5	56.3	19.8	5	22
18/05/2013	28.0	7.4	5.0	66.0	62.0	34	81.5
20/05/2013	28.4	7.4	6.2	72.0	75.4	4	78.5
22/05/2013	23.7	7.5	4.8	61.0	105.0	2	70.5
24/05/2013	29.9	7.5	6.2	71.8	225.0	5	135
27/05/2013	28.2	7.4	6.2	72.1	344.5	5	224
29/05/2013	29.1	7.4	6.0	69.0	59.3	3.5	61
31/05/2013	26.7	7.3	4.6	52.2	47.6	2.5	62.5
Action Level	-	<5.5 or >7.5	<3.91	-	>60	-	>50
Limit Level	-	<4.0 or >8.0	<3.82	-	>64	-	>53
MP5
02/05/2013	20.8	7.5	5.2	58.2	37.5	4	36.5
04/05/2013	22.6	7.6	6.1	69.9	45.9	5	39.5
06/05/2013	24.8	7.5	4.2	50.0	27.8	3	26.5
08/05/2013	24.1	7.4	3.2	36.6	28.8	16	16.5
10/05/2013	27.3	7.5	4.5	56.0	30.2	5.5	20.5
13/05/2013	27.5	7.4	3.7	46.4	34.0	7	26.5
15/05/2013	27.4	7.4	3.1	39.2	35.4	5	36
18/05/2013	28.1	7.4	4.5	57.9	57.9	14.5	42.5
20/05/2013	27.6	7.5	4.4	55.8	37.2	4	41
22/05/2013	24.1	7.6	3.7	45.3	94.5	3	86.5
24/05/2013	29.4	7.5	4.8	61.3	41.0	6	32.5
27/05/2013	28.1	7.5	6.4	75.1	156.5	4	125
29/05/2013	29.4	7.5	5.8	65.8	73.4	3	63.5
31/05/2013	26.7	7.5	4.5	53.4	46.6	3	49
Action Level	-	<5.5 or >7.5	<4.13	-	>81	-	>66
Limit Level	-	<4.0 or >8.0	<3.87	-	>84	-	>69
MP6
02/05/2013	21.1	7.5	5.8	64.1	65.5	7	49
04/05/2013	22.8	7.6	5.7	62.0	63.9	6	70
06/05/2013	24.7	7.5	4.8	56.8	30.8	9	36
08/05/2013	23.8	7.4	3.9	45.4	34.8	7	32
10/05/2013	26.8	7.5	3.9	48.6	43.2	6	43
13/05/2013	26.8	7.5	4.3	53.2	53.2	7	56.5
15/05/2013	27.2	7.5	3.8	47.4	95.7	5	132
18/05/2013	27.8	7.5	4.7	60.2	82.7	11	102
20/05/2013	27.5	7.5	3.7	47.6	29.0	12	35.5
22/05/2013	23.8	7.6	4.1	52.0	82.2	2.5	59
24/05/2013	29.2	7.6	4.1	52.6	39.2	5	21.5
27/05/2013	27.9	7.5	4.8	60.7	39.1	3	33
29/05/2013	29.2	7.5	6.4	75.0	138.2	4	126.5
31/05/2013	26.8	7.2	4.3	49.8	63.4	6	100.5
Action Level	-	<5.5 or >7.5	<4.61	-	>94	-	>75
Limit Level	-	<4.0 or >8.0	<4.52	-	>96	-	>75

Notes:

(1) “<2 “ : BOD value is too low to indicate (<2mg/L).

(2) Values Bold indicate Action Level exceedance.

(3) Values Underlined and Bold indicate Limit Level exceedance.

Exceedance Investigation and Findings

During May 2013, Action Level exceedances of pH were observed at MP3, MP5 and MP6, while exceedances of DO, turbidity and/or SS were observed at MP3 to MP6. DO exceedance was observed 13 times at MP3, four times at MP4, four times at MP5 and eight times at MP6. SS and/or turbidity exceedance was recorded on three monitoring dates at MP3, seven monitoring dates at MP4, two monitoring dates at MP5 and four monitoring dates at MP6 during the reporting month.

The Event and Action Plan in Appendix D was followed under these cases of exceedances.

From investigation, construction activities during the period of exceedance included mainly site formation and foundation work, as well as pond drainage management in the Wetland Restoration Area (to lower the water level and remove unwanted species in the pond). It was observed that the Contractor has implemented water quality mitigation measures as recommended in the EIA report, including the provision of temporary drainage facility and associated treatment facility. Sand bags are in place in the temporary drainage channel to enhance the desilting efficiency. The Contractor further enhanced the water quality mitigation measures by erecting several segments of rock bunds at the discharge outlet to avoid site runoff draining directly to the northern ditches.

Exceedances of pH, DO and turbidity and SS at MP3

Exceedance of the action and/or limit level of pH observed on one monitoring date at MP3, while Action/Limit Level exceedance of DO was recorded on 13 monitoring dates at MP3. Also, Action/Limit Level exceedance of turbidity and/or SS were observed on three monitoring dates, As understood, the fish pond near the site (represented by MP3) was being separated from the construction site by the WRA since November 2010, so the exceedances were not considered to be related to the construction activities. The exceedances of pH, DO, turbidity and SS may be due to external factors such as pond fish culture activities which were out of the control of the project. The turbidity exceedance may have been caused by fish movements.

Exceedances of pH, DO, turbidity and SS at MP4 to MP6

During the reporting month, exceedance of the Action/Limit Level of pH was observed at MP5 and MP6 but not observed at MP4. Meanwhile, Action/Limit Level of DO was exceeded four times at MP4, four times at MP5 and eight times at MP6. Action/Limit Level exceedance of turbidity was observed on at MP4 on 18, 20, 22, 24 and 27 May 2013, at MP5 on 22 and 27 May 2013 and at MP6 on 15 and 29 May 2013. Action/Limit Level exceedance of SS was observed at MP4 on 18, 20, 22, 24, 27, 29 and 31 May 2013, at MP5 on 22 and 27 May 2013 and at MP6 on 15, 18, 29 and 31 May 2013.

From Hong Kong Observatory (HKO) records, total rainfall recorded at HKO during the reporting month was 509.3 mm, which was well above the 1981-2010 climatological normal for the same month of 304.7 mm. The heaviest rain fell on 22 and 25 May 2013 when 230.8 and 52.0 mm of rain were recorded respectively at HKO. Black and Red Rainstorm Warning signals as well as Special Announcement on Flooding in the northern New Territories were issued on 22 May 2013, while Amber Rainstorm Warning signal was issued on 8, 9, 16, 20, 21, 22 and 25 May 2013. In addition to the heaviest rainy days mentioned above, between 20 and 35 mm of rain per day was recorded on 3, 8, 9, 10, 18, 20 and 21 May 2013. It was also noted that at least a trace of rainfall was recorded by HKO on 29 of the 31 days during the reporting month, including all but one of the relevant days of turbidity and/or SS exceedance. Strong Monsoon Signal was issued on four days, but no tropical cyclone warning signal was issued during the reporting month.

The heavy and/or persistent rainfall may have caused a large amount of surface runoff from all sources in the vicinity of the open ditch. It is believed that the runoff significantly increased the turbulence and thus resulted in higher turbidity and/or SS inside the ditch water on the days of turbidity and/or SS exceedance. This may have caused the colour of water body in the ditch to be brown at MP4 on 24 May 2013 (please refer to Photo 4). The higher SS induced by the heavy and/or persistent rain may also have resulted in a decrease in DO on some of the monitoring days.

From photo record at MP4 and MP5 on 27 May 2013, suspected routine dredging works (unrelated to the Project) to remove floating plants in the open ditch were observed during monitoring and the colour of water body in the ditch was brown at MP4 and slightly brown at MP5. These works may have significantly increased the turbulence and therefore may have caused the particularly higher turbidity and SS inside the ditch water at MP4 and MP5 on this particular day. Furthermore, the colour of the water body in the ditch was brown at MP6 on 29 May 2013. This may have been a consequential flow-on effect from the nearby abovementioned dredging works which may have increased the turbulence at MP6, causing the particularly higher turbidity and/or SS inside the ditch water at that location on 29 and 31 May 2013.

Also, the site effluent was effectively treated by the AquaSed system and discharged from the site at a low, controlled rate during the reporting month.

Conclusion

As a result, the abovementioned exceedances are unlikely to be due to the construction works and therefore not considered to be related to the project.

4. Ecological Monitoring

4.1 Introduction

This report documents surveys conducted in the Survey Area between 1 and 31 May 2013. The Wetland Restoration Area (WRA) is also surveyed as the area is accessible and site formation works for WRA has been completed. The updated survey transect is provided in Figure 4.1. Dates and ecological surveys conducted during this period are summarised in Appendix H.

4.2 Monitoring of Birds

Monitoring was undertaken following the survey methodology in the EM&A Manual. A transect was followed in the bird surveys (see Figure 4.1). All bird species were identified to species and all bird species of conservation importance and/or wetland dependent were enumerated and recorded to the habitats in which they were observed. Flying birds were not recorded unless they were foraging and/or associated with the habitat (such as swifts). Further, notable bird observations during other surveys were also recorded.

Bird surveys were conducted on a weekly basis. A total of 33 bird species were recorded in the Survey Area (excluding the WRA), 16 of which were species of conservation importance and/or wetland-dependence. Within the WRA, 18 bird species were recorded, 9 of which were species of conservation importance and/or wetland-dependent species, including one of the target species (i.e. Little Egret) was recorded. A summary of survey data is provided in Appendix I.

4.3 Monitoring of Herpetofauna

One night time herpetofauna survey was conducted in the reporting month. One Gunther's Frog was recorded in the Survey Area (excluding the WRA) and one Checkered Keelback was recorded in the WRA

4.4 Monitoring of Dragonflies and Butterflies

Monitoring of dragonflies and butterflies were conducted on a bi-weekly basis according to the EM&A Manual. A total of six odonata species were recorded in the Survey Area (excluding the WRA) while six butterfly species were recorded. Within the WRA, a total of 14 odonata species were recorded, while four butterfly species were recorded. A summary of the survey findings is provided in Appendix J.

4.5 Monitoring of Mammals

Monitoring of mammals was conducted concurrently with other surveys. No mammals were recorded in the Survey Area (excluding the WRA) nor the WRA during regular survey. No mammals species were recorded in other surveys. A summary of the survey findings is provided in Appendix J.

4.6 Monitoring of Water Quality

During the reporting period, pH of Cells 2 and 4 reached the Action Level. No measures are proposed at the moment, but the condition will be monitored. Monitoring data are presented in Appendix K.

4.7 Monitoring of Soil Quality

Pedology samples were collected on 31 May 2013 for laboratory analysis of soil quality. Results will be presented in a future Monthly EM&A Report when the data are received.

4.8 Management Activities

4.8.1 Vegetation Management

Removal of exotic vegetation in all cells was undertaken; these included but not limited to Ipomoes sp., Mikania sp., Mimosa sp., Pennisetum sp. and Typha sp.

Vegetation management activities undertaken at the site primarily involved watering of plants, weeding and grass cutting.

4.8.2 Wildlife Management

Removal of Golden Apple Snail was undertaken on an “as-seen” basis.

All sighted red fire ant nests were treated with approved pesticide.

4.9 Summary

Ecological monitoring during May 2013 was carried out according to the survey methodology and frequency outlined in the EM&A Manual.

Summary of survey findings is listed as follows:

Table 4.1: Summary of Ecological Monitoring in WRA and Survey Area

Species	Survey Area (excluding WRA)	WRA
Birds (total)	33	18
Birds (of conservation importance and/or wetland-dependence)	16	9
Amphibians	1	0
Reptiles	0	1
Mammals	0	0
Odonates	6	14
Butterflies	6	4

Survey findings indicate that the ponds within the Survey Area supported numbers and diversity of wetland-dependent birds typical of fish pond areas. The WRA continues to attract wetland dependent fauna and serves as a buffer between the residential portion and the fishponds in the north.

5. Landscape and Visual

5.1 Site Inspections

The EM&A programme for Landscape and Visual impact due to the construction commenced in May 2010 and continued during the reporting period. Site inspections on Landscape and Visual impact were carried out on 15 and 28 May 2013 to confirm the implementation of mitigation measures at construction stage.

5.2 Construction Phase Audit Summary

The audit was undertaken with references to the specific checklists provided in Tables 2.13 – 2.15 and audit results are summarized as below:

Table 5.1: Construction and Operation Phase Audit Summary

Area of Works	Items to be Monitored
Works Area	The boundaries of the works area have been established on site in accordance with the contract documents and approved plans (EP), and the limit of current heavy construction activity is now confined to within the site hoardings (North side of the site / access road) and the noise barriers (other sides of the site). Minor works such as horticultural maintenance of the planting and transplanted trees, and boundary fence repair was proceeding along the Royal Palms - Palm Springs boundary. No construction works were observed to have exceeded the site boundaries. No construction was carried out at the wetland restoration area after 15 November 2010.
Protection of all trees and woodland blocks to be retained	Trees retained within the site along the northeast boundary, beside wetland restoration area, have been identified and protected by temporary protective fencing.
Streams	The works site is partly encircled by a berm / perimeter channel to intercept surface water and prevent it from washing off into any of the neighboring sites. Surface water is collected within the site in a temporary drainage channel. Gravels beds and barriers have been installed to filter site runoff, sedimentation ponds have been provided to enable primary treatment before discharge to mains drains.
Clearance of existing vegetation	Site clearance was completed prior to the commencement of construction.
Transplanting of trees	Tree transplanting has been completed, with the trees relocated to various points within the planting strip along the southern boundary of the site, outside the noise barrier. The trees continue to re-establish well.
Topsoil stripping	Suitable pond bund and soil material which had been excavated and stockpiled from the original site, has now been re-used within the landscape works Dust suppression measures are active along all internal site access tracks.
New buildings	No new permanent buildings have yet been constructed on site
Boundaries	Hoardings have been erected along most of the boundaries of the site. Installation of new screen fence between the future residential sites and the constructed wetland restoration areas is complete. Fence has been painted green to match with the surrounding vegetated environment.
Noise Barrier	Noise barriers have been installed along the southern and western boundaries of the site in accordance with the contract requirements. Their design complies with the mitigation requirements, with upper 6 to 7m portion of the barrier being made from a translucent material with green tinted (to match with the environment). Supporting GMS structure, likewise, has been painted green.
Night-time lighting	No night-time works were reported to have been carried out during the monitoring period
Landscape and wetland treatments generally	Continuous belt of screen planting along the southern and western boundaries of the site has been completed. The formation, soiling and water control structures of the wetland restoration area have been completed. The wetland areas are being established, with the ponds are being seasonally filled with rain water. Planting of areas around the WRA cells is complete. No construction was carried out at the wetland restoration area after 15 November 2010.
Soiling, etc.	The soiling for the advance planting strip has been completed. The soil placement and grading for each of the wetland restoration areas has been completed.
Plant supply	The plant material used in the Advance Planting Strip and in the WRA are all commonly available species and came from commercial sources. Transplanted reeds (Phragmites australis) at the wetland habitat came from the temporary holding nursery onsite.
Planting	The total number of trees that will reach a minimum of 10m in the advance planting strip meets the contract requirements. The tree species are all from the approved list. This planting should achieve the required screening effect within the required time period. Some of the trees that were identified as dead in previous month or having defects (i.e. extensive bark damage, cavities, fungal growths etc) still need to be replaced with new specimens. Some of the recently planted trees are still in poor condition, but are showing small signs of graduate improvement Seedling trees and shrubs, have been established at the margins of the wetland cells. Some additional fill-in planting has been undertaken.
Establishment Works	Maintenance operations for the advance planting, compensatory planting and transplanted trees are generally being undertaken in accordance with the specification, although some of the long outstanding items have not yet been addressed / fully addressed Some of the taller trees that were partially blown over, or growing into the noise barrier structure, have been set upright and supported with cables and bamboo stakes, but the technique used is unsatisfactory and many trees still need to be rectified. Precautions should be taken to prevent tree damage by the structure. Trees from outside the site which fell on top of trees in the advance planting strip, have partly been removed but no rectification of affected trees has been undertaken. Some of the trees previously noted as having severe trunk damage (e.g. lower trunk of T333), and fungal growths on the bark, still need to be replaced with new specimens. Trees T21 and T364 have lost their leader and are no longer viable, so should be removed and replaced. Branches broken on trees have been pruned away. Workmanship of some pruning works did not comply with proper arboricultural practice resulting in bark tearing. Large hanging branches on T20, T266 and T419 should be removed immediately. Broken branch noted on tree behind the newly planted shrubs near WRA cell 4 Profuse fungal growth was noted on trunk of T292. Tree is irreparably damaged / rotten and should be removed immediately. Some of the tree tags are embedding into the trunk. Tree ties and tags should be re-set to avoid strangling the trees. Excessive sap flow due to a tight wire on the trunk of T142. Some shrub areas are covered with fallen leaves, branches and debris which needs to be cleared away. In some areas shrub growth is still thin and needs to be replanted. Many fungi are growing on the dead vegetable matter throughout the advance planting strip. These should be cleared and fungicide applied. Soil exposed in the bare areas is beginning to erode, and surface protection / replanting is urgently required. Soil runoff from the area near the noise barrier needs to be cleared away and barriers erected to prevent its re-occurrence. Invasive climbers and weeds have been cleared in some areas behind the noise barrier and along the planting strip but many areas still need clearance. Weeding should be carried out thoroughly, on a monthly basis, as weeds will inhibit growth of the advance planting. Pruning of all overgrown shrubs needs to be undertaken regularly. Regular horticultural maintenance (grass cutting, weeding, watering etc.) in the shrubs and tree seedling areas around the WRA cells is being undertaken. The stands of Phragmites australis reeds in the WRA cells are still growing profusely and becoming invasive. Although some have been partially cleared, active management of these reeds is urgently needed to stop them from affecting other plant species (repeat). The growth of seedling trees / shrubs planted on the north side of WRA1 is unsatisfactory and needs improvement.

6. Environmental Site Inspection and Audit

6.1 Site Inspection

The ET had carried out construction phase weekly site inspections on 7, 16, 23 and 28 May 2013. All observations have been recorded in the site inspection checklist and passed to the Contractor together with the appropriate recommended mitigation measures where necessary. The key observations from site inspections and associated recommendations are summarized in Table 6.1.

Table 6.1: Summary of Site Inspections and Recommendations

Key Observations	ET Recommendation	Contractor’s Responses / Action(s) Undertaken	Close-out (Date)
Some parts of the haul road were dry	To provide water spray to minimize fugitive dust nuisance	Agreed and followed up	21 May 2013
Some oil stains on the ground were observed	To remove the oil stains and treat affected soil as chemical waste	Agreed and followed up	21 May 2013

6.2 Advice on the Solid and Liquid Waste Management Status

The Contractor has been registered as a chemical waste producer for the Project. Construction and demolition (C&D) material sorting was carried out on site. A sufficient number of receptacles were available for general refuse collection.

As advised by the Contractor, no C&D material was generated on site during the period. 4[w1] kg of metals was generated and collected by registered recycling collector. 3 kg of paper/cardboard packing and 15 kg of plastic were generated on site and collected by registered recycling collector. No chemical waste was generated and collected by licensed chemical waste collector. 90 kg of other types of wastes (e.g. general refuse) was generated on site and disposed of at public landfill facility.

The Contractor is advised to maintain on site waste sorting and recording system and maximize reuse/recycling of C&D wastes.

6.3 Status of Environmental Licenses and Permits

The environmental permits, licenses, and/or notifications on environmental protection for this Project which were valid during the reporting period is summarised in Table 6.2.

Table 6.2: Status of Environmental Submissions, Licenses and Permits

Statutory Reference	Description	Permit/Reference No.	Status
EIAO	Environmental Permit	EP-311/2008/D	Valid
APCO	Notification of Construction Work under APCO	316688 (27 Apr 2010)	Valid
WPCO	Discharge License	WT00007442-2010 (2 Nov 2010)	Valid
WDO	Registration as Chemical Waste Producer	WPN0000-542-H3083-04	Valid
WDO	Bill Account for disposal	700945423	Valid

Legend: EIAO – Environmental Impact Assessment Ordinance

APCO – Air Pollution Control Ordinance

WPCO – Water Pollution Control Ordinance

WDO – Waste Disposal Ordinance

6.4 Recommended Mitigation Measures

The EM&A programme followed the recommended mitigation measures in the EM&A Manual. The EM&A requirements as well as the summary of implementation status of the environmental mitigation measures are provided in Appendix L. In particular, the following mitigation measures were brought to attention during the site audits:

Air Quality

· Access roads should be sprayed with water or dust suppression chemical to maintain the entire road surface wet or paved; and

· All vehicles should be washed to remove any dusty materials before leaving the construction sites.

Water Quality

· Soil contaminated with chemicals/oils should be removed from site, and the voids created should be filled with suitable materials.

· Ensure proper functioning of the wastewater treatment facility; and

· Silt and debris should be removed from the temporary drainage channel regularly.

Waste Management

· Reuse the excavated materials as far as practical to reduce the amount of waste disposal; and

· Oil stains on soil should be cleared by disposal of contaminated soil.

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

7.1 Record on Non-compliance of Action and Limit Levels

There is no breach of Action or Limit Levels for Air Quality and Noise monitoring in the reporting month.

During May 2013, Action Level exceedances of pH were observed at MP3, MP5 and MP6, while exceedances of DO, turbidity and/or SS were observed at MP3 to MP6. DO exceedance was observed 13 times at MP3, four times at MP4, four times at MP5 and eight times at MP6. SS and/or turbidity exceedance was recorded on three monitoring dates at MP3, seven monitoring dates at MP4, two monitoring dates at MP5 and four monitoring dates at MP6 during the reporting month.

Table 7.1: Summary of Exceedances in Water Quality

Monitoring Date	pH	Dissolved Oxygen (mg/L)	Turbidity (NT)	Suspended Solids (mg/L)
MP3
02/05/2013	7.3	3.6	66.2	62
04/05/2013	7.3	7.6	17.9	17.5
06/05/2013	7.3	6.4	30.0	30
08/05/2013	7.4	3.4	50.7	48
10/05/2013	7.3	3.8	41.3	35.5
13/05/2013	7.3	4.3	30.9	30
15/05/2013	7.3	4.0	32.7	29
18/05/2013	7.3	4.8	54.6	54
20/05/2013	7.3	4.7	49.4	52
22/05/2013	7.3	5.8	48.9	41.5
24/05/2013	7.3	4.4	79.5	81.5
27/05/2013	7.3	5.0	60.2	57.5
29/05/2013	7.8	6.1	53.6	42
31/05/2013	7.5	6.0	65.0	101
Action Level	<5.5 or >7.5	<6.85	>64	>65
Limit Level	<4.0 or >8.0	<6.65	>67	>66
MP4
02/05/2013	7.5	3.7	14.9	15.5
04/05/2013	7.5	6.2	34.9	37.5
06/05/2013	7.4	3.4	17.0	15.5
08/05/2013	7.4	3.5	15.4	31
10/05/2013	7.5	4.1	27.3	23
13/05/2013	7.4	3.7	33.0	29.5
15/05/2013	7.4	4.5	19.8	22
18/05/2013	7.4	5.0	62.0	81.5
20/05/2013	7.4	6.2	75.4	78.5
22/05/2013	7.5	4.8	105.0	70.5
24/05/2013	7.5	6.2	225.0	135
27/05/2013	7.4	6.2	344.5	224
29/05/2013	7.4	6.0	59.3	61
31/05/2013	7.3	4.6	47.6	62.5
Action Level	<5.5 or >7.5	<3.91	>60	>50
Limit Level	<4.0 or >8.0	<3.82	>64	>53
MP5
02/05/2013	7.5	5.2	37.5	36.5
04/05/2013	7.6	6.1	45.9	39.5
06/05/2013	7.5	4.2	27.8	26.5
08/05/2013	7.4	3.2	28.8	16.5
10/05/2013	7.5	4.5	30.2	20.5
13/05/2013	7.4	3.7	34.0	26.5
15/05/2013	7.4	3.1	35.4	36
18/05/2013	7.4	4.5	57.9	42.5
20/05/2013	7.5	4.4	37.2	41
22/05/2013	7.6	3.7	94.5	86.5
24/05/2013	7.5	4.8	41.0	32.5
27/05/2013	7.5	6.4	156.5	125
29/05/2013	7.5	5.8	73.4	63.5
31/05/2013	7.5	4.5	46.6	49
Action Level	<5.5 or >7.5	<4.13	>81	>66
Limit Level	<4.0 or >8.0	<3.87	>84	>69
MP6
02/05/2013	7.5	5.8	65.5	49
04/05/2013	7.6	5.7	63.9	70
06/05/2013	7.5	4.8	30.8	36
08/05/2013	7.4	3.9	34.8	32
10/05/2013	7.5	3.9	43.2	43
13/05/2013	7.5	4.3	53.2	56.5
15/05/2013	7.5	3.8	95.7	132
18/05/2013	7.5	4.7	82.7	102
20/05/2013	7.5	3.7	29.0	35.5
22/05/2013	7.6	4.1	82.2	59
24/05/2013	7.6	4.1	39.2	21.5
27/05/2013	7.5	4.8	39.1	33
29/05/2013	7.5	6.4	138.2	126.5
31/05/2013	7.2	4.3	63.4	100.5
Action Level	<5.5 or >7.5	<4.61	>94	>75
Limit Level	<4.0 or >8.0	<4.52	>96	>75

Notes:

(1) Values Bold indicate Action Level exceedance.

(2) Values Underlined and Bold indicate Limit Level exceedance.

7.2 Record on Environmental Complaints received

On 15 May 2013, a complaint was lodged with the Environmental Protection Department (EPD) on ecological and dust impact near Palm Springs, Yuen Long. The complaint was about suspected unmitigated construction activities, which led to impact to wetland ecology and suspected dust emissions from the Wo Shang Wai construction site, which causes air impact to the Palm Springs area. According to the complainant, a long term dust generation from the Wo Shang Wai construction site has caused dust impact to the nearby Narcissus Path and Banyan Path. The complaint was subsequently received by MMHK from the EPD on 24 May 2013, and an investigation was conducted (see Section 7.4 below).

7.3 Record on Notifications of Summons and Successful Prosecution

No notifications of summons or successful prosecution were received the reporting month.

7.4 Review of Reasons for and Implications of Non-compliance, Complaints, Summons and Prosecutions

Non-compliance

Investigations have been carried out to identify the causes of water quality exceedance.

From investigation, construction activities during the period of exceedance included mainly site formation and foundation work, as well as  pond drainage management in the Wetland Restoration Area (to lower the water level and remove unwanted species in the pond). It was observed that the Contractor has implemented water quality mitigation measures as recommended in the EIA report, including the provision of temporary drainage facility and associated treatment facility. Sand bags are in place in the temporary drainage channel to enhance the desilting efficiency. The Contractor further enhanced the water quality mitigation measures by erecting several segments of rock bunds at the discharge outlet to avoid site runoff draining directly to the northern ditches.

With external factors affecting the adjacent environments, such as natural variations, pond fish culture activities, rainfall and suspected routine dredging works (unrelated to the Project), the exceedances were considered not due to Project construction works.

Complaint

From ET’s investigation of the complaint, the major site activity conducted during April and May 2013 were consolidation of site formation. Potential dust sources from the site include dust from haul road and stockpiles, backfilling, consolidation of site formation and movement of machineries. Potential ecological impact sources from the site include consolidation of site formation and movement of machineries.

Based on the site daily record provided by Contractor, the Contractor implemented the following air quality and ecological mitigation measures as recommended in EM&A Manual which include:

¡ Maintain and operate the automatic sprinkler system to ensure water spraying within the site boundary for dust suppression;

¡ Water spraying within the site boundary for dust suppression where the automatic sprinkler system cannot cover;

¡ Covering of dusty stockpiles;

¡ Compaction of fill materials by rollers;

¡ Every vehicle was washed to remove any dusty materials from its body and wheels before leaving the construction site;

¡ Clear Definition of Project Area Limit with a well-established fence;

¡ Maintenance of wastewater treatment facilities to avoid water quality impact to nearby sensitive receivers.

Other potential dust sources that can be identified nearby include:

¡ Construction site for Express Rail Link

¡ Construction of village houses

¡ Traffic from San Tin Highway

Weekly site audits were conducted since the start of the EM&A programme. During the 28 May 2013 site audit, regular water spraying of the haul road near the site boundary with Palm Springs was observed.

Dust monitoring was conducted since commencement of construction of the Project. No exceedance of action and limit levels for 24-hour Total Suspended Particulates (TSP) was recorded from April to 16 May 2013. The maximum 24-hour TSP levels recorded at the four air quality monitoring stations AM1, AM2, AM3 and AM4 during this period were 98 mg/m³, 96 mg/m³, 96 mg/m³ and 102 mg/m³ respectively, which were well below the action levels of 226 mg/m³, 213mg/m³, 205 mg/m³ and 237 mg/m³ respectively.

In addition, no exceedance of action and limit levels for 1-hour TSP was recorded from April to 24 May 2013. The maximum 1-hour TSP levels recorded at the four air quality monitoring stations AM1, AM2, AM3 and AM4 during this period were 122 mg/m³, 122 mg/m³, 126 mg/m³ and 134 mg/m³ respectively, which were well below the action levels of 378 mg/m³, 357 mg/m³, 358 mg/m³ and 372 mg/m³ respectively.

On the other hand, the prevailing wind direction in April and May 2013 was mostly northeast and easterly from the information obtained from the Hong Kong Observatory.

Also, it is observed that the photos provided by the complainant are not the most up-to-date, as the Contractor has implemented additional dust control measures since January 2013, such as automatic sprinkler system and additional paving of haul roads, to enhance the dust control measures and reduce the dust source.

In accordance to the proposed ecological mitigation measures in the EIA report (AEIAR-120/2008), a Wetland Restoration Area (WRA) was established to the North of the Project Area and the established period concluded in October 2012.

Regular surveys for the Ecological Monitoring are conducted in accordance to the approved EM&A manual. During the surveys, an increase in diversity and numbers of different types of fauna has been observed within the survey area and WRA. Based on the survey results, no apparent adverse impact to the ecological surroundings has been observed.

There was no deterioration of air quality and adverse impact to the ecological environment observed during regular site audit carried out by the Environmental Team on 28 May 2013.

7.5 Follow-up Actions Taken

Non-compliance

As non-compliances have been recorded, the Event and Action Plan has been followed. Although it is considered that the exceedances were not related to the Project, the Contractor was reminded to implement the water quality mitigation measures in accordance with the recommendation stated in Section 5.6.1 – 5.6.4 of the EIA Report as far as practicable and regular spot check would be conducted on the nearby discharge by Contractor and inform ET for investigation.

To cater for the site runoff in wet season, the Contractor has further enhanced the water quality mitigation measures by erecting several segments of rock bunds at the discharge outlet to avoid site runoff draining directly to the northern ditches.

Complaint

Air quality and ecological mitigation measures as recommended in the Implementation Schedule of the EM&A Manual have been implemented by Contractor to minimise the air quality nuisance arising from the site activities. No immediate actions are required, but the Contractor is reminded to ensure all proposed mitigation measures recommended in the Implementation Schedule of the EM&A Manual are implemented to reduce any possible environmental impacts.

7.6 Cumulative Statistics for Complaints, Notifications of Summons and Successful Prosecutions

Cumulative statistics for complaints, notifications of summons and successful prosecutions for the Project account for period starting from the date of commencement of construction (i.e. 12 May 2010) to the end of the reporting month and are summarized in the Table 7.2 below.

Table 7.2: Statistics for Complaints, Notifications of Summons and Successful Prosecutions

Reporting Period	Cumulative Statistics
	Complaints	Notifications of summons	Successful prosecutions
This reporting month (May 2013)	1	0	0
From 12 May 2010 to end of the reporting month (May 2013)	5	0	0

8. Future Key Issues

8.1 Site Preparatory Works and Construction Works for the Coming Month

The major site works scheduled to be commissioned in the coming month include:

¡ Site Formation

¡ Foundation Work

¡ Superstructure

¡ Pond drainage management in the Wetland Restoration Area (to lower the water level and remove unwanted species in the pond)

8.2 Key Issues for the Coming Month

Key issues to be considered in the coming month include:

¡ Generation of dust from activities on-site during dry weather conditions;

¡ Noise impact from operating equipment and machinery on-site;

¡ Generation and treatment of site surface runoffs and wastewater from activities on-site and during wet weather conditions;

¡ Sorting, recycling, storage and disposal of general refuse and construction waste from activities on-site; and

¡ Management of chemicals and avoidance of oil spillage on-site and to the drainage.

8.3 Monitoring Schedule for the Coming Month

The environmental site inspection and environmental monitoring will be continued in the coming month. Impact monitoring for air, noise, water quality, ecology and landscape and visual in accordance with the approved EM&A Manual has commenced since 12 May 2010. The tentative monitoring schedule for June 2013 is shown in the Table 8.1.

Table 8.1: Tentative Environmental Monitoring and Audit Schedule for June 2013

8.4 Conclusions and Recommendations

8.4.1 Conclusions

The EM&A programme as recommended in the EM&A manual has been undertaken in the reporting month since 12 May 2010.

Monitoring of Air Quality, Noise, Water Quality, Ecology and Landscape and Visual impacts due to the Project was under way. In particular, the 1-hr TSP, 24-hr TSP, noise level (as L_eq) and water quality parameters (such as pH, DO and SS) under monitoring have been checked against established Action and Limit levels.

There was no breach of Action and Limit Levels for 1-hr TSP, 24-hr TSP and noise in the reporting month.

During May 2013, Action/Limit Level exceedances of pH, DO, turbidity and/or SS were observed at MP3 to MP6. Investigations have been carried out to identify the causes of exceedance. From investigation, the Contractor has implemented water quality mitigation measures as recommended in the EIA report. With external factors affecting the adjacent environments, such as natural variations, pond fish culture activities, rainfall and suspected routine dredging works (unrelated to the Project), the exceedances were considered not due to construction works.

On 15 May 2013, a complaint was lodged with the Environmental Protection Department (EPD) on ecological and dust impact near Palm Springs, Yuen Long. The complaint was about suspected unmitigated construction activities, which led to impact to wetland ecology and suspected dust emissions from the Wo Shang Wai construction site, which causes air impact to the Palm Springs area. According to the complainant, a long term dust generation from the Wo Shang Wai construction site has caused dust impact to the nearby Narcissus Path and Banyan Path.The complaint was subsequently received by MMHK from the EPD on 24 May 2013. From the investigation conducted into the complaint, air quality and ecological mitigation measures as recommended in the Implementation Schedule of the EM&A Manual have been implemented by Contractor to minimise the air quality nuisance arising from the site activities. Nevertheless, the Contractor is reminded to ensure all proposed mitigation measures recommended in the Implementation Schedule of the EM&A Manual are implemented to reduce any possible environmental impacts.

8.4.2 Recommendations

With considerations on the construction activities and environment, the following recommendations were provided:

Air Quality

· Access roads should be sprayed with water or dust suppression chemical to maintain the entire road surface wet or paved; and

· All vehicles should be washed to remove any dusty materials before leaving the construction sites.

Water Quality

· Soil contaminated with chemicals/oils should be removed from site, and the voids created should be filled with suitable materials.

· Ensure proper functioning of the wastewater treatment facility; and

· Silt and debris should be removed from the temporary drainage channel regularly.

Waste Management

· Reuse the excavated materials as far as practical to reduce the amount of waste disposal; and

· Oil stains on soil should be cleared by disposal of contaminated soil.

Appendix A. Project Organization Chart

Contact information:

Company	Position	Name	Telephone
Heng Shung Construction Co. Ltd.	Assistant Construction Manager	Ms. Lynne HUNG	2908 2391
(The Contractor)	Site Agent	Mr. POON Man Ho	9426 3533
	Environmental Officer	Mr. Ricky WONG	9866 7625
ENVIRON Hong Kong Ltd. (Independent Environmental Checker (IEC))	Independent Environmental Checker	Mr. David YEUNG	3465 2888
Mott MacDonald Hong Kong Ltd. (Environmental Team (ET))	Environmental Team Leader	Mr. Terence KONG	2828 5919

Appendix B. Tentative Construction Programme

Appendix C. Action and Limit Levels for Construction Phase

Air Quality

Action and Limit Levels for 24-hour TSP

Monitoring Station	Action Level (mg/m^3)	Limit Level (mg/m^3)
ASR1	226	260
ASR2A	213	260
ASR3	205	260
ASR4	237	260

Action and Limit Levels for 1-hour TSP

Monitoring Station	Action Level (mg/m^3)	Limit Level (mg/m^3)
ASR1	378	500
ASR2A	357	500
ASR3	358	500
ASR4	372	500

Noise

Action and Limit Levels for Construction Noise

Time Period	Action Level	Limit Level
NSR1, NSR3, NSR5, NSR7
0700 – 1900 hours on normal weekdays	When one documented complaint is received from any one of the sensitive receivers	75 dB(A)

Water Quality

Action and Limit Levels for Water Quality

Parameters	DO in mg/L		Turbidity in NTU		SS in mg/L		pH
	Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level	Action Level	Limit Level
MP1	1.23	1.17	173	177	231	299	< 5.5 or > 7.5	< 4.0 or > 8.0
MP2	1.04	0.89	132	163	170	209
MP3	6.85	6.65	64	67	65	66
MP4	3.91	3.82	60	64	50	53
MP5	4.13	3.87	81	84	66	69
MP6	4.61	4.52	94	96	75	75

Appendix D. Event and Action Plan for Air Quality, Noise, Water Quality, Ecology and Landscape & Visual

Air Quality

Event	Action
	ET Leader	IEC	ER	Contractor
Action Level
1. Exceedance for one sample	1. Identify source, investigate the causes of exceedance and propose remedial measures. 2. Inform IEC and ER. 3. Repeat measurement to confirm finding. 4. Increase monitoring frequency to daily.	1. Check monitoring data submitted by ET. 2. Check Contractor’s working method.	1. Notify Contractor.	1. Rectify any unacceptable practice. 2. Amend working methods if appropriate.
2. Exceedance for two or more consecutive samples	1. Identify the source. 2. Inform IEC and ER. 3. Advise ER on the effectiveness of the proposed remedial measures 4. Repeat measurements to confirm findings. 5. Increase monitoring frequency to daily. 6. Discuss with IEC and the Contractor on remedial actions required. 7. If exceedance continues, arrange meeting with IEC and ER. 8. If exceedance stops, cease additional monitoring.	1. Check monitoring data submitted by ET. 2. Check the Contractor’s working method. 3. Discuss with ET Leader and the Contractor on possible remedial measures. 4. Advise ER on the effectiveness of the proposed remedial measures. 5. Supervise implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing. 2. Notify the Contractor. 3. Ensure remedial measures properly implemented.	1. Submit proposals for remedial actions to IEC within 3 working days of notification. 2. Implement the agreed proposals. 3. Amend proposal if appropriate.
Limit Level
1. Exceedance for one sample	1. Identify source, investigate the causes of exceedance and propose remedial measures. 2. Inform ER and EPD. 3. Repeat measurement to confirm finding. 4. Increase monitoring frequency to daily. 5. Assess effectiveness of Contractor’s remedial actions and keep IEC, EPD and ER informed of the results.	1. Check monitoring data submitted by ET. 2. Check the Contractor’s working method. 3. Discuss with ET Leader and the Contractor on possible remedial measures. 4. Advise ER on the effectiveness of the proposed remedial measures. 5. Supervise implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing. 2. Notify the Contractor. 3. Ensure remedial measures properly implemented.	1. Take immediate action to avoid further exceedance. 2. Submit proposals for remedial actions to IEC within 3 working days of notification. 3. Implement the agreed proposals. 4. Amend proposal if appropriate.
2. Exceedance for two or more consecutive samples	1. Notify IEC, ER, EPD and the Contractor. 2. Identify the source. 3. Repeat measurements to confirm findings. 4. Increase monitoring frequency to daily. 5. Carry out analysis of the Contractor’s working procedures to determine possible mitigation to be implemented. 6. Arrange meeting IEC and ER to discuss the remedial actions to be taken. 7. Assess effectiveness of the Contractor’s remedial actions and keep IEC, EPD and ER informed of the results. 8. If exceedance stops, cease additional monitoring.	1. Discuss amongst ER, ET Leader and the Contractor on the potential remedial actions. 2. Review the Contractor’s remedial actions whenever necessary and advise ER accordingly. 3. Supervise the implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing. 2. Notify the Contractor. 3. In consultation with IEC, agree with the remedial measures to be implemented. 4. Ensure remedial measures are properly implemented. 5. If exceedance continues, consider what activity of the work is responsible and instruct the Contractor to stop that activity of work until the exceedance is abated.	1. Take immediate action to avoid further exceedance. 2. Submit proposals for remedial actions to IEC within 3 working days of notification. 3. Implement the agreed proposals. 4. Resubmit proposals if problem still not under control. 5. Stop the relevant activity of works as determined by ER until the exceedance is abated.

Construction Noise

Event	Action
	ET Leader	IEC	ER	Contractor
Action Level	1. Notify IEC and the Contractor. 2. Carry out investigation. 3. Report the results of investigation to IEC and the Contractor. 4. Discuss with the Contractor and formulate remedial measures. 5. Increase monitoring frequency to check mitigation measures.	1. Review with analysed results submitted by ET. 2. Review the proposed remedial measures by the Contractor and advise ER accordingly. 3. Supervise the implement of remedial measures.	1. Confirm receipt of notification of exceedance in writing. 2. Notify the Contractor. 3. Require the Contractor to propose remedial measures for the analysed noise problem. 4. Ensure remedial measures are properly implemented.	1. Submit noise mitigation proposals to IEC. 2. Implement noise mitigation proposals.
Limit Level	1. Identify the source. 2. Notify IEC, ER, EPD and the Contractor. 3. Repeat measurement to confirm findings. 4. Increase monitoring frequency. 5. Carry out analysis of Contractor’s working procedures to determine possible mitigation to be implemented. 6. Inform IEC, ER, and EPD the causes & actions taken for the exceedances. 7. Assess effectiveness of the Contractor’s remedial actions and keep IEC, EPD and ER informed of the results. 8. If exceedance stops, cease additional monitoring.	1. Discuss amongst ER, ET Leader and the Contractor on the potential remedial actions. 2. Review the Contractor’s remedial actions whenever necessary to assure their effectiveness and advise ER accordingly. 3. Supervise the implementation of remedial measures.	1. Confirm receipt of notification of exceedance in writing. 2. Notify the Contractor. 3. Require the Contractor to propose remedial measures for the analysed noise problem. 4. Ensure remedial measures are properly implemented. 5. If exceedance continues, consider what activity of the work is responsible and instruct the Contractor to stop that activity of work until the exceedance is abated.	1. Take immediate action to avoid further exceedance. 2. Submit proposals for remedial actions to IEC within 3 working days of notification. 3. Implement the agreed proposals. 4. Resubmit proposals if problem still not under control. 5. Stop the relevant activity of works as determined by the ER until the exceedance is abated.

Water Quality

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.
2. 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 Engineer 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
1. Exceedance for one sample	1. Repeat in-situ measurement to confirm finding; 2. Identify source(s) of impact; 3. Inform IEC, Contractor and EPD; 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 Engineer 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.
2. 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; 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 Engineer, to slow down or to stop all or part of the marine work or construction activities.

Appendix E. Calibration certificates

Appendix F. Graphical plots of the monitoring results

Appendix G. Weather conditions during the monitoring period

Appendix H. Ecological Monitoring conducted

May 2013	1	2	3	4	5	6	7	8	9	10	11	12	13	14	15
Mammals			ü				ü							ü
Birds			ü				ü							ü
Herpetofauna														ü
Dragonflies & butterflies			ü											ü
Water Quality
Inspection Visits			ü							ü				ü

May 2013	16	17	18	19	20	21	22	23	24	25	26	27	28	29	30	31
Mammals						ü							ü
Birds						ü							ü
Herpetofauna
Dragonflies & butterflies													ü
Water Quality									ü
Inspection Visits									ü							ü

Note: Light grey cells indicate public holidays, Saturdays or Sundays.

.

Appendix I. Summary of Bird Surveys conducted

Table I1. Summary of bird species of conservation importance and/or wetland-dependence recorded in the Survey Area (excluding the WRA)

Species Name^(5)	Scientific Name^(5)	Conservation Status ^(2)	May 2013
			Occurrence^(3)	Mean^(4)
Little Grebe	Tachybaptus ruficollis	LC, (1)	5	5.8
Black-crowned Night Heron	Nycticorax nycticorax	(LC), (1)	2	1.2
Chinese Pond Heron	Ardeola bacchus	PRC, (RC), (1)	5	4.2
Little Egret	Egretta garzetta	PRC, (RC), (1)	5	9.0
Intermediate Egret	Egretta intermedia	RC, (1)	2	0.6
Great Egret	Egretta alba	PRC, (RC), (1)	5	4.0
Tufted Duck	Aythya fuligula	LC, (1)	2	0.4
Black Kite	Milvus migrans	RC	1	0.2
Common Moorhen	Gallinula chloropus	(1)	1	0.2
Green Sandpiper	Tringa ochropus	(1)	2	0.6
Common Sandpiper	Actitis hypoleucos	(1)	1	0.2
Whiskered Tern	Chlidonias hybrida	LC, (1)	2	1.2
Common Kingfisher	Alcedo atthis	(1)	3	0.8
Eastern Yellow Wagtail	Motacilla tschutschensis	(1)	2	0.8
White Wagtail	Motacilla alba	(1)	5	3.2
White-shouldered Starling	Sturnus sinensis	(LC), (1)	1	0.6
No. of Species Recorded			16

(1) Indicates wetland-dependant or wetland-associated species.

(2) Conservation status follows that of Fellowes et al. (2002) and BirdLife International listing (2011).

(3) Indicates number of surveys recorded within the reporting period.

(4) Refers to the mean number of individuals recorded in the reporting period (excluding the WRA)

(5) Follows HK bird list (dated 2013-2-25).

Table I2. Summary of bird species of conservation importance and/or wetland-dependence recorded in the WRA

Species Name^(5)	Scientific Name^(5)	Conservation Status ^(2)	May 2013		Records Outside Surveys
			Occurrence^(3)	Mean^(4)
Little Grebe	Tachybaptus ruficollis	LC, (1)	1	1.5	ü
Yellow Bittern	Ixobrychus sinensis	LC, (1)	2	1.0	ü
Little Egret	Egretta garzetta	PRC, (RC), (1)	2	0.6
Black Kite	Milvus migrans	RC	1	0.2
White-breasted Waterhen	Amaurornis phoenicurus	(1)	-	-	ü
Common Sandpiper	Actitis hypoleucos	(1)	1	0.2
Common Kingfisher	Alcedo atthis	(1)	3	0.6
Eastern Yellow Wagtail	Motacilla tschutschensis	(1)	1	0.2
White Wagtail	Motacilla alba	(1)	2	1.0
No. of Species Recorded			9

(1) Indicates wetland-dependant or wetland-associated species.

(2) Conservation status follows that of Fellowes et al. (2002) and BirdLife International listing (2011).

(3) Indicates number of surveys recorded within the reporting period.

(4) Refers to the mean number of individuals recorded in the reporting period at WRA.

(5) Follows HK bird list (dated 2013-02-25).

Appendix J. Summary of Herpetofauna, Mammal and Insect Surveys conducted

Table J1. Summary of herpetofauna monitoring in the Survey Area (excluding the WRA)

Species Name	Scientific Name	Conservation Status^(1)	May 2013
			Occurrence^(2)	Mean^(3)
Amphibian	No. of	Species Recorded	0
Gunther's Frog	Rana guentheri	-	1	1
			Occurrence^(2)	Mean^(3)
Reptile	No. of	Species Recorded	0
(No recordsin May 2013)

(1) Conservation status follows that of Fellowes et al. (2002), Chan et al. (2005) and Karsen et al. (1998).

(2) Indicates number of surveys recorded within the reporting period.

(3) Refers to the mean number of individuals recorded in the reporting period (excluding the WRA).

Table J2. Summary of herpetofauna monitoring in the WRA

Species Name		Scientific Name	Conservation Status^(1)	May 2013
				Occurrence^(2)	Mean^(3)
Amphibian		No. of	Species Recorded	0
(No records in May 2013)
				Occurrence^(2)	Mean^(3)
Reptiles	No. of		Species Recorded	0
(No records in May 2013)

(1) Conservation status follows that of Fellowes et al. (2002), Chan et al. (2005) and Karsen et al. (1998).

(2) Indicates number of surveys recorded within the reporting period.

(3) Refers to the mean number of individuals recorded in the reporting period in the WRA.

Table J3. Summary of mammal monitoring in the Survey Area (excluding the WRA)

Species Name	Scientific Name	Conservation Status^(1)	May 2013
			Occurrence^(2)	Mean^(3)
Mammal	No. of	Species Recorded	0
(No records in May 2013)

(1) Conservation status follows that of Fellowes et al. (2002) and Shek (2006).

(2) Indicates number of surveys recorded within the reporting period.

(3) Refers to the mean number of individuals recorded in the reporting period (excluding the WRA).

Table J4. Summary of mammal monitoring in the WRA

Species Name	Scientific Name	Conservation Status^(1)	May 2013		Records Outside Surveys
			Occurrence^(2)	Mean^(3)
Mammal	No. of	Species Recorded	0
(No records in May 2013)

(1) Conservation status follows that of Fellowes et al. (2002) and Shek (2006).

(2) Indicates number of surveys recorded within the reporting period.

(3) Refers to the mean number of individuals recorded in the reporting period in the WRA.

Table J5. Summary of odonate and butterfly monitoring in the Survey Area (excluding WRA)

Common Name	Scientific Name	Conservation Status^(1)	May 2013
			Occurrence^(2)	Mean^(3)
Odonate	No. of Species Recorded		6
Common Bluetail	Ischnura senegalensis	-	2	27.3
Common Flangetail	Ictionogomphus pertinax	-	2	1.7
Variegated Flutterer	Rhyothemis variegata arria	-	1	1.0
Saddlebag Glider	Tramea virginia	-	2	1.0
Green Skimmer	Orthetrum sabina sabina	-	1	0.3
Asian Amberwing	Brachythemis contaminata	-	1	1.3
Butterfly	No. of Species Recorded		6
Long-tailed Blue	Lampides boeticus	-	1	0.3
Pale Grass Blue	Pseudozizeeria maha serica	-	2	1.0
Indian Cabbage White	Pieris canidia	-	2	1.0
Common Grass Yellow	Eurema hecabe	-	2	1.3
Paris Peacock	Papilio paris	-	0	0.0
Mottled Emigrant	Catopsilia pyranthe	-	1	0.3

(1) Conservation status follows that of Fellowes et al. (2002), Lo & Hui (2004), Tam et al. (2011) and Young & Yiu (2002).

(2) Indicates number of surveys recorded within the reporting period.

(3) Refers to the mean number of individuals recorded in the survey (excluding the WRA).

Table J6. Summary of dragonfly and butterfly monitoring in the WRA

Common Name	Scientific Name	Conservation Status^(1)	May 2013
			Occurrence^(2)	Mean^(3)
Odonate	No. of Species Recorded		14
Common Bluetail	Ischnura senegalensis	-	3	201.3
Organge-tailed Sprite	Ceriagrion auranticum ryukyuanum	-	1	0.3
Asian Pintail	Acisoma panorpoides	-	1	0.3
Blue Percher	Diplacodes trivialis	-	1	0.3
Evening Skimmer	Tholymis tillarga	-	1	0.3
Lessor Emperor	Anax parthenope julius	-	1	0.3
Common Flangetail	Ictionogomphus pertinax	-	2	2.0
Variegated Flutterer	Rhyothemis variegata arria	-	2	32.0
Saddlebag Glider	Tramea virginia	-	2	1.7
Wandering Glider	Pantala flavescens	-	1	0.7
Blue Dasher	Brachydiplax chalybea flavovittata	-	1	0.3
Pied Percher	Neurothemis tullia tullia	-	1	0.3
Green Skimmer	Orthetrum sabina sabina	-	1	1.7
Asian Amberwing	Brachythemis contaminata	-	1	1.7
Butterfly	No. of Species Recorded		4
Pale Grass Blue	Pseudozizeeria maha serica	-	1	0.7
Indian Cabbage White	Pieris canidia	-	2	1.0
Common Grass Yellow	Eurema hecabe	-	2	1.3
Paris Peacock	Papilio paris	-	1	0.3

(1) Conservation status follows that of Fellowes et al. (2002), Lo & Hui (2004), Tam et al. (2011) and Young & Yiu (2002).

(2) Indicates number of surveys recorded within the reporting period.

(3) Refers to the mean number of individuals recorded in the reporting period in the WRA.

Appendix K. Summary of Monitoring of Water Quality associated with Ecological Monitoring conducted

Table K1. Water quality at WRA in May 2013

Cell No.	Temp. (°C)	pH	Salinity (ppt)	Turb (mg/L)	DO (mg/L)	Water Level (cm)
1	29.1	8.00	0.85	11.2	6.2	220
2	29.0	8.11	1.04	9.7	5.5	180
3	29.0	7.99	0.87	6.2	4.9	220
4	28.7	8.21	0.89	18.7	5.5	220

Note: Values highlighted in bold indicate that action level is reached; whereas values in bold and underline indicate that limit level is reached.

Appendix L. Environmental Mitigation Measures - Implementation Status

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