Proposed Extension of Public Golf Course

at Kau Sai Chau Island, Sai Kung

 

Environmental Monitoring and Audit

 

Baseline Monitoring Report

 

 

 

 

 

 

 

 

Black & Veatch Hong Kong Limited

Room 1201-11, Millennium City 5,

418 Kwun Tong Road,

Kowloon, Hong Kong

The Hong Kong Jockey Club

One Sports Road

Happy Valley

Hong Kong

 

March 2006


Table of Content

 

EXECUTIVE SUMMARY

1.      Introduction

1.1        Background of the Project

1.2        Objectives of EM&A programme

1.3        Project Organisation

1.4        Structure of the Report

2.      AIR QUALITY

2.1        Air Quality Parameters

2.2        Monitoring Equipment

2.3        Monitoring Parameters, Frequency and Duration

2.4        Monitoring Methodology

2.5        Action and Limit Levels

3.      WATER QUALITY

3.1        Monitoring Requirements

3.2        Monitoring Equipment

3.3        Monitoring Parameters, locations, Frequency and Duration

3.4        Monitoring Locations

3.5        Monitoring Methodology

3.6        Maintenance / Calibration

3.7        QA/QC Procedure

3.8        Results and Observations

3.9        Statistical Analysis of Baseline

4.      ECOLOGY

4.1        Introduction

4.2        Ecological Mitigation Measures and Implementations

4.3        Terrestrial Ecological Conditions Reported in the EIA

4.4        Terrestrial Ecology Baseline Survey For EM&A

4.5        Marine Ecological Baseline Survey

5.      Landscape and Visual

6.      Revision for inclusion into EM&A Manual

7.      Conclusions and Recommendations

 

 

Name

Signature

Date

Prepared

Esther Tong

March 2006

Checked

Manuel Chua

March 2006

Reviewed

Johan Wong

March 2006

Verified

Gary Tam

March 2006

 

List of Appendix

Appendix A      Baseline Monitoring Schedule

Appendix B       Weather Condition

Appendix C       Baseline Monitoring Results (Raw Data)

Appendix D      Baseline Monitoring Results (Graphical)

Appendix E       Calibration Certificates for In-Situ Equipments

Appendix F       Marine Water Quality at Port Shelter (EPD 2003 and 2004)

Appendix G       Photos Plates for Ecology Baseline Monitoring

Appendix H      Tentative Construction Programme

Appendix I        Curricula Vitae of Marine Ecologist

 

List of Figure

1.1        Location of the Proposed project

1.2        Master Layout Plan of the proposed third golf course

1.3        Project Organisation and Lines of Communication

2.1        Proposed Air Quality Monitoring locations

3.1        Proposed Water Quality Monitoring Locations (Construction phase)

4.1        Proposed Ecology Monitoring Locations

4.2        Proposed coral transplantation locations

4.3        Location of coral and seagrass monitoring (Sites D2, D3 and C)

4.4        Control Site for Natural Coral Monitoring

 

List of Table

Table 2.1 Air Quality Monitoring Equipment

Table 2.2 Air Quality Monitoring Equipment

Table 2.3 Air Quality Monitoring Period

Table 2.4 Summary of Baseline Air Quality Monitoring Results

Table 2.5 Action and Limit Levels for Air Quality

Table 2.6 Derived Action and Limit Levels for 24-hour and 1-hour TSP

Table 3.1Discrete Water Quality Monitoring Equipment

Table 3.2 Water Quality Monitoring Locations and Parameters for Baseline Monitoring

Table 3.3 Analytical Methods to be applied to Water Quality Samples

Table 3.4 Tentative Stream and Marine Impact Monitoring Programme (Construction Phase)

Table 3.5 Derivation of Action and Limit Levels for Stream and Marine Waters

Table 3.6a – Marine Water Quality - Average, minimum and maximum values for water depth

Table 3.6b – Marine Water Quality - Average, minimum and maximum values for water temperature

Table 3.6c – Marine Water Quality - Average, minimum and maximum values for Salinity

Table 3.6d – Marine Water Quality - Average, minimum and maximum values for Dissolved Oxygen

Table 3.6e – Marine Water Quality - Average, minimum and maximum values for pH

Table 3.6f – Marine Water Quality - Average, minimum and maximum values for Turbidity

Table 3.6g – Marine Water Quality - Average, minimum and maximum values for Suspended Solids

Table 3.6h – Marine Water Quality - Average, minimum and maximum values for Ammonia Nitrogen

Table 3.6i – Marine Water Quality - Average, minimum and maximum values for Nitrite Nitrogen

Table 3.6j – Marine Water Quality - Average, minimum and maximum values for Nitrate Nitrogen

Table 3.6k – Marine Water Quality - Average, minimum and maximum values for Total Inorganic Nitrogen

Table 3.6l – Marine Water Quality - Average, minimum and maximum values for Total Phosphorus

Table 3.6m – Marine Water Quality - Average, minimum and maximum values for Chlorophyll a

Table 3.7a – River Water Quality - Average, minimum and maximum values for Water Temperature

Table 3.7b – River Water Quality - Average, minimum and maximum values for Salinity

Table 3.7c – River Water Quality - Average, minimum and maximum values for Dissolved Oxygen

Table 3.7d – River Water Quality - Average, minimum and maximum values for pH

Table 3.7e – River Water Quality - Average, minimum and maximum values for Turbidity

Table 3.7f – River Water Quality - Average, minimum and maximum values for Suspended Solids

Table 3.7g – River Water Quality - Average, minimum and maximum values for Ammonia Nitrogen

Table 3.7h – River Water Quality - Average, minimum and maximum values for Nitrite Nitrogen

Table 3.7i – River Water Quality - Average, minimum and maximum values for Nitrate Nitrogen

Table 3.7j – River Water Quality - Average, minimum and maximum values for Total Inorganic Nitrogen

Table 3.7k – River Water Quality - Average, minimum and maximum values for Total Phosphorus

Table 3.7l – River Water Quality - Average, minimum and maximum values for Chlorophyll a

Table 3.8 Summary of Result of ANOVA

Table 3.9 EPD marine water quality data at 2003-2004 (PM4 & PM9)

Table 3.10 Derived Summaries of Action and Limit Levels for Marine Water Quality

Table 3.11 Derived Summaries of Action and Limit Levels for Freshwater Water Quality

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

DOCUMENT CONTROL

Proposed Extension of Public Golf Course at Kau Sai Chau, Sai Kung

No.           382210.REP

AMENDMENT RECORD

Prepared by: Esther Tong

Baseline Monitoring Report

Client:

Hong Kong Jockey Club

Initials:  ET

Date:       March 2006

Pages:

Date:

Issue No.

Description:

Initials:

All

Dec 05

1

Final Report

ET

All

Feb 06

1

Final Report

ET

All

Mar 06

2

Final Report

ET

All

Mar 06

3

Final Report

ET

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 


Executive Summary

 

This baseline monitoring report prepared by the Environmental Team (ET) of Black & Veatch Ltd for baseline monitoring under the Environmental Permit No. EP-224/2005 (the EP) for the Project of “Proposed Extension of Public Golf Course at Kau Sai Chau, Sai Kung. Under the requirements of Section 4 of the EP, EM&A programme as set out in the EM&A Manual is required to be implemented during the construction and operation phases of the Project.

 

Prior to the commencement of construction works, baseline of air quality, water quality and ecology monitoring that were performed in November and December 2005 in order to establish the background environmental conditions in the vicinity of the Project area.  Based on the monitoring results, action and limit levels were determined.

 

14 sets of 1-hour TSP and 24-hour TSP monitoring were carried out on 29th November to 12th December 2005 for 14 days at Bungalow A (GCA B1) at Kau Sai Chau during the baseline monitoring according to the revised EM&A Manual.  The average 1-hour TSP and 24-hour TSP levels at Bungalow A were in the range of 33.3-56.8 mg/m3 and 56.4-147.2 mg/m3 respectively.  The 1-hour TSP and 24-hour TSP results were generally found to be staying in low to intermediate levels.  The monitoring results and calculated action and limit levels are shown in Section 2 of this report.

 

12 sets of water quality monitoring at 9 marine and 7 freshwater stations were carried out on 26th Nov, 28th Nov, 30th Nov, 2nd Dec, 5th Dec, 7th Dec, 9th Dec, 12th Dec, 14th Dec, 16th Dec, 19th Dec and 21st Dec 2005.  Water quality monitoring parameters including dissolved oxygen, temperature turbidity, suspended solids, pH, salinity, nitrate nitrogen, nitrite nitrogen, ammonia nitrogen, total phosphorus, chlorophyll a and other relevant data (such as water depth, monitoring time, tidal stages and weather condition) were recorded during the baseline monitoring. The monitoring results and calculated action and limit levels are shown in Section 3 in this report.

 

Baseline terrestrial ecology surveys were conducted on 16, 20 and 22 December 2005.  The habitats within the project sites, in particular the three natural streams (Stream A, B, & C) remained natural and were of similar conditions as recorded during the EIA study.  While the baseline marine ecology surveys were conducted 13, 19, 20 and 21 December 2005.  Site B2, C, D2 and a Control Site were surveyed for corals while Site D3 was surveyed for seagrasses.  The seagrass beds in Site D3 were found of smaller area and lower coverage percentage than those recorded during the EIA study.  20 hard corals of significant sizes and of good conditions were selected and tagged at each of the sites for coral monitoring. All 80 tagged corals were recommended to be monitored in the EM&A programme. 

 

The landscape and visual site survey was carried on 26th Nov and 21st Dec 2005.  During the period of the baseline monitoring, no major construction activity was carried out.  The site situation is similar to the baseline characteristics during the EIA study.  Section 5 is summarized the site survey in this report.

 

Data collected and details of all the locations were reviewed and analyzed to establish the Action and Limit Levels for air quality and water quality during impact/compliance monitoring. The benchmark of pre-construction freshwater and marine ambient conditions of the area has been established through baseline monitoring surveys.  These together with EPD longer term marine monitoring data and EIA recommendations have been considered in determining the construction phase action and limit levels for impact monitoring purpose.  Statistical analysis of the baseline marine and river water quality data was also performed and provided in the Section 3 of the report.

 

Details of the operation phase monitoring specified in the EM&A Manual should be subject to review taking into account findings of the construction impact monitoring.  Such details should be reported in the monthly EM&A reports as the project progress.

 

The measured results of the monitoring parameters are considered representative of the pre-construction ambient conditions prior to the commencement of the works.   In conclusion, the Contractor is advised to be aware of any site practice that may give rise to significant pollution to the existing environment. Implementation of necessary remedial measures should be instigated to rectify the potential impact on sensitive receivers located in the vicinity of the construction area. 


1.           Introduction

1.1         Background of the Project

 

1.1.1               China Harbour Engineering Co. (Group) (the Contractor) was commissioned by the Hong Kong Jockey Club to carry out the Proposed Extension of Public Golf Course at Kau Sai Chau Island, Sai Kung.  Black & Veatch was employed by the Hong Kong Jockey Club as Environmental Team (ET) to undertake the Environmental Monitoring and Audit (EM&A) works for the Project.  Project location is at Kau Sai Chau, Port Shelter, Northeast New Territories east of Sai Kung.  The Project is more closely defined as being on the east side of Kau Sai Chau immediately south of the existing public golf course (Figure 1.1). 

 

1.1.2               The Project comprises the following (Figure 1.2):

·         Construction of a third 18-hole public golf course on the east side of the island, south of the existing golfing area;

·         A new irrigation lake to collect surface runoff from new 18-hole golf course.  Water stored at the new irrigation lake can also be diverted to existing reservoir for tertiary treatment and recycling;

·         A new desalination plant adjacent to the existing pier serve as an additional irrigation water supply for the new golf course during dry season; and

·         Expansion of existing administration and maintenance buildings.

 

1.2         Objectives of EM&A programme

 

1.2.1               The construction and operation impacts resulting from the implementation of the Project are specified in the EIA Report.  The EIA Report also specifies mitigation measures which need to be implemented to ensure compliance with the required environmental criteria.  The EIA recommends that environmental monitoring will be necessary to assess the effectiveness of measures implemented to mitigate potential environmental impacts during construction of the Project.  Regular environmental auditing during construction is also recommended to ensure that potential impacts are adequately addressed through the implementation of the mitigation measures defined in the EIA Report.

 

1.3         Project Organisation

 

1.3.1               Project organization and lines of communication are shown in Figure 1.3.

1.4         Structure of the Report

1.4.1               Following this introductory section, the  report is set out as follows:

·                 Section 2 details the baseline air quality monitoring requirement s and results;

·                 Section 3 details the baseline water quality monitoring requirements, methodology results;

·                 Section 4 details the baseline ecology monitoring requirements, methodology and results;

·                 Section 5 Conclusion Landscape and Visual; and

·                 Section 6 Conclusion and Recommendations


2.           AIR QUALITY

The baseline air quality monitoring will be conducted in accordance with the EM&A manual.  Details are summarized below.

 

2.1                  Air Quality Parameters

 

2.1.1               The air quality parameters include 1-Hour Total Suspended Particulates (1Hr-TSP) and 24-Hour Total Suspended Particulates (24-Hr TSP):

 

·             24-hour TSP level of samples will be collected using filters and High Volume Sampler and the collected samples will be determined by a local HOKLAS accredited laboratory upon receipt of the samples; and

·             1-hour TSP level will be performed in-situ.

 

2.2                   Monitoring Equipment

 

2.2.1               High volume samplers (HVS - Model GS-2310 Accu-vol) complete with the appropriate sampling inlets were installed for 24-hour TSP sampling. The HVS is composed of a motor, a filter holder, a flow controller and a sampling inlet and its performance specification complies with USEPA Standard Title 40, Code of Federation Regulations Chapter 1 (Part 50 Appendix B). A portable dust meter was used for the 1-hour TSP monitoring. The table summarises the equipment used.

 

Table 2.1 Air Quality Monitoring Equipment

 

Equipment

Model

HVS Sampler

GS 2310 Accu-vol system

Calibrator

GMW 25

1-hour TSP Dust Meter

Laser Dust Monitor – Model LD-1 (L)

 

2.3                   Monitoring Parameters, Frequency and Duration

 

2.3.1               Baseline monitoring shall be carried out to determine the ambient 1-hour and 24‑hour TSP levels at the designated monitoring locations, as shown in Table 2.2, prior to the commencement of the Project works.  During baseline monitoring, there shall not be any construction or dust generating activities in the vicinity of the monitoring stations.

 

2.3.2               TSP baseline monitoring shall be carried out for a continuous period of at least two weeks under typical weather conditions, with the 24-hour and three 1-hour ambient measurements taken daily at each monitoring location.  General meteorological conditions (wind speed, direction and precipitation) and notes regarding any significant adjacent dust producing sources shall also be recorded throughout the baseline monitoring period.

 

Table 2.2 Air Quality Monitoring Equipment

 

Monitoring station

Parameter

Frequency

GCA B1*

24-Hour TSP

Daily, for 14 consecutively days

1-Hour TSP

3 times (at three consecutive hours)/day, for 14 consecutive days

 

Remarks: * - Bungalow A, adjacent ot Kau Sai Chau Public Golf Course Administration Building

 

 

Table 2.3 Air Quality Monitoring Period

 

Location

Monitoring Period

GCA B1

1-Hour TSP

24-Hour TSP

29 Nov 2005 – 12 Dec 2005

29 Nov 2005 – 12 Dec 2005

 

2.4                   Monitoring Methodology

 

24-hour TSP Monitoring

 

(i) Field Monitoring, Operation & Analytical Procedures

 

2.4.1               Operating/analytical procedures for the operation of HVS are as follows.  The sampler was placed on a horizontal platform with appropriate supporting structure such that:

 

·             the filter was at least 1.3 meters above ground;

·             no two samplers should be placed less than 2 metres apart;

·             the distance between the sampler and an obstacle, such as buildings, would be at least twice the height that the obstacle protrudes above the sampler;

·             a minimum of 2 metres separation from walls, parapets and penthouses would be required for the rooftop samplers;

·             a minimum of 2 metres separation from any supporting structure, measured horizontally would be  required;

·             airflow around the sampler would be unrestricted;

·             no furnaces or incineration flues would be operating near the sampler;

·             the sampler would be more than 20 metres from the dripline; and

·             any wire fence and gate, to protect the sampler, should not cause any obstruction during monitoring.

 

2.4.2               Prior to the commencement of the dust sampling, the flow rate of the high volume sampler was properly set (between 1.1 m3/min. and 1.4 m3/min.) in accordance with the manufacturer's instruction to within the range recommended in USEPA Standard Title 40, CFR Part 50.

 

2.4.3               For TSP sampling, fibreglass filters (G810) were used [Note: these filters have a collection efficiency of > 99% for particles of 0.3 mm diameter].

 

2.4.4               The power supply was checked to ensure the sampler worked properly.

 

2.4.5               On sampling, the sampler was operated for 5 minutes to establish thermal equilibrium before placing any filter media at the designated air monitoring station.

 

2.4.6               The filter holding frame was then removed by loosening the four nuts and carefully a weighted and conditioned filter was centered with the stamped number upwards, on a supporting screen.

 

2.4.7               The filter was aligned on the screen so that the gasket formed an air-tight seal on the outer edges of the filter. Then the filter holding frame was tightened to the filter holder with swing bolts. The applied pressure should be sufficient to avoid air leakage at the edges.

 

2.4.8               The shelter lid was closed and secured with the aluminum strip.

 

2.4.9               The timer was then programmed. Information was recorded on the record sheeting, which included the starting time, the weather condition, and the filter number (the initial weight of the filter paper can be found out by using the filter number).

 

2.4.10           After sampling, the filter was transferred from the filter holder of the HVS to a sealable plastic bag and sent to the laboratory for weighing. The elapsed time was also recorded.

 

2.4.11           Before weighing, all filters were conditioned for 24 hours before weighing under temperature of 25°C ±3°C and the relative humidity (RH) < 50% ±5%, preferably 40%.   ALS Technichem (HK) Pty Ltd. has comprehensive quality assurance and quality control programmes.

 

(ii) Maintenance

 

2.4.12           Proper maintenance would be provided for the HVS as follows:

 

·             The HVS motors and their accessories have been properly maintained. Appropriate maintenance such as routine motor brushes replacement (time interval for replacement is about 500 hours) and electrical wiring checking have been conducted to ensure that the equipment and necessary power supply were in good working condition.

 

·             Initial calibration of HVS was conducted upon installation of equipment. The subsequent calibration would be provided at 2-month intervals using GMW-25 Calibration Kit.

 

1-hour TSP Monitoring

 

(i) Measuring Procedures

 

2.4.13           The measuring procedures of the 1-hour dust meter have been 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.

 

·         All measurement procedures in section 2.3 of the approved EM&A Manual are followed during the reporting period.

 

(i) Maintenance

 

2.4.14           The 1-hour TSP meter would be checked at 3-mnth intervals and calibrated at 1-year intervals throughout all stages of the air quality baseline monitoring.

 

2.3                   Results and Observations

 

2.5.1               The baseline air quality monitoring results for GCA B1 are summarized in Table 2.4.  Monitoring data and graphical presentation of the 1-hour and 24-hour TSP monitoring results are presented in Appendix C.

 

Table 2.4 Summary of Baseline Air Quality Monitoring Results

 

Location

Average 1-hour TSP concentration, µg/m³ (Range)

Average 24-hour TSP concentration, µg/m³ (Range)

GCA B1

41.9

( 33.3-56.8 )

88.3

( 56.4-147.2 )

 

 

2.5.2               The weather condition during the monitoring periods was general fine.  No major dust impacts were identified since there was no construction work around the monitoring stations during the baseline monitoring.  Dust monitoring data from the air quality monitoring station can, therefore, be used as background indicator at Kau Sai Chau.

 

2.5                   Action and Limit Levels

 

2.5.1               The Action and Limit Levels have been set in accordance with the Environmental Monitoring and Audit Manual, which states as following table.

 

Table 2.5 Action and Limit Levels for Air Quality

 

Parameter

Action Level (1)

Limit Level

TSP (24 hour average)

§         BL £ 200 μg m-3, AL = (BL * 1.3 + LL)/2

§         BL > 200 μg m-3, AL = LL

260 μg m-3

TSP (1 hour average)

§         BL £ 384 μg m-3, AL = (BL * 1.3 + LL)/2

§         BL > 384 μg m-3, AL = LL

500 μg m-3

 

(1)           BL = Baseline level, AL = Action level, LL = Limit level.

 

 

 

2.5.2               Following these criteria, the Action and Limit Levels for air quality have been set as follows:

 

 

 

 

 

 

 

Table 2.6 Derived Action and Limit Levels for 24-hour and 1-hour TSP

 

Parameter

Location

Action Level

Limit Level

TSP (24 hour average)

GCA B1

 ( 88.3 * 1.3 + 260) / 2

= 187.4 μg m-3

260 μg m-3

TSP (1 hour average)

GCA B1

(41.9 * 1.3 + 500) / 2

= 277.2 μg m-3

500 μg m-3

 

 


3.           WATER QUALITY

 

3.1         Monitoring Requirements

 

3.1.1               In accordance with the EM&A manual, baseline of dissolved oxygen (DO), temperature, turbidity, suspended solids (SS), pH and salinity at 7 freshwater water quality monitoring stations and 9 marine water quality monitoring stations during construction phase were established.  In addition to the above parameters, water quality monitoring parameters also include nitrate nitrogen (NO3-N), nitrite nitrogen (NO2-N), ammonia nitrogen (NH3-N), total phosphorus (TP) and selected pesticides parameters.  Baseline water quality monitoring at designated locations, at a frequency of 3 days per week, for consecutive weeks prior to commencement of works.

 

3.2         Monitoring Equipment

 

3.2.1               The parameters of dissolved oxygen, temperature, turbidity, pH and salinity were measured in-situ and the suspended solids were analysed in a HOKLAS accredited laboratory.  The water quality monitoring equipment deployed is described in Table 3.1.

 

Table 3.1Discrete Water Quality Monitoring Equipment

 

Equipment

Model

Multi-meter

YSI 6920

Water Sample

Wildco Alpha Water Bottle (Vertical)

 

 

3.3         Monitoring Parameters, locations, Frequency and Duration

 

3.3.1               For marine water quality, measurements shall be taken at both mid-flood and mid-ebb tides and at three water depths (1 m below water surface, mid-depth and 1 m above sea bed, except where the water depth is less than 6 m, in which case the mid-depth station may be omitted).  Should the water depth be less than 3 m, only the mid-depth station will be monitored. 

 

3.3.2               For the stream course, measurements shall be taken at mid-water depth.

 

3.3.3               The water quality parameters which need to be monitored are as follows:

 

§             Marine water quality - dissolved oxygen (DO), temperature, turbidity, suspended solids (SS), pH and salinity

§             Stream water quality - dissolved oxygen (DO), temperature, turbidity, suspended solids (SS) and pH

 

3.3.4               Additional marine and stream water quality monitoring parameters for the baseline monitoring also include nitrate nitrogen (NO3-N), nitrite nitrogen (NO2-N), ammonia nitrogen (NH3-N), total phosphorus (TP) and Chl-a.

 

3.3.5               In association with the water quality parameters, relevant data including monitoring location/position, time, weather conditions, and any special phenomena shall also be measured.

 

3.3.6               Measurements shall be taken at all designated monitoring locations including control stations, 3 days per week, for a period of 4 consecutive weeks prior to commencement of works.  The interval between of monitoring shall not be less than 36 hours.  The purpose of the baseline monitoring is to establish ambient conditions without any discharge from the Project.

 

3.3.7               There shall be no construction works in the vicinity of the stations during baseline monitoring.

 

3.4         Monitoring Locations

 

3.4.1               The water monitoring locations (Figure 3.1) are summarized in Table 3.2.

 

 

Table 3.2 Water Quality Monitoring Locations and Parameters for Baseline Monitoring

 

Identification Number

Location

Approx. water depth

Co-ordinates

Monitoring parameters

Marine Water (9 stations)

 

latitude

longitude

 

TTC

Tai Tau Chau Fish Culture Zone

9.5 m

22° 22’ 03.7”

114° 19’ 19.6”

In-Situ:

DO, Temp., Turbidity, pH and Salinity

 

Laboratory testing:

SS, NO3-N, NO2-N, NH3-N, TP and Chl-a.

 

KLW

Kai Lung Wan Fish Culture Zone

13 m

22° 22’ 10.6”

114° 18’ 01.4”

KS

Kau Sai Fish Culture Zone

11 m

22° 20’ 26.5”

114° 18’ 59.9”

M_BP

Temporary barging point

9.6 m

22° 21’ 50.6”

114° 19’ 16.7”

M_RO1

Desalination plant south of the existing pier

5 m

22° 21’ 51.8”

114° 18’ 17.7”

M _ Marsh

Discharge point at the existing marsh

7.7 m

22° 22’ 19.8”

114° 19’ 05.4”

M _ Coral

Marine water of Port Shelter

10.2m

22° 21’ 21.3”

114° 19’ 42.7”

M _ A

Water Control Station of Port Shelter

7.5 m

22° 22’ 51.3”

114° 18’ 34.5”

M _ B

Water Control Station of Port Shelter

16.5 m

22° 20’ 26.4”

114° 20’ 11.8”

Fresh Water (7 stations)

 

 

 

F_UA

F_DA

Upstream and downstream of stream A

-

22° 21’ 32.3”

114° 19’ 06.5”

22° 21’ 33.5”

114° 19’ 06.8”

F_UB

F_DB

Upstream and downstream of stream B

-

22° 21’ 23.9”

114° 19’ 16.1”

22° 21’ 27.2”

114° 19’ 16.0”

F_UC

F_DC

Upstream and downstream of stream C

-

22° 21’ 14.8”

114° 19’ 26.4”

22° 21’ 03.5”

114° 19’ 32.0”

F _ Inland M

Downstream of the existing marsh (Inland)

-

22° 22’ 17.9”

114° 18’ 59.1”

 

3.5         Monitoring Methodology

 

3.5.1               Dissolved oxygen (DO), temperature, turbidity, pH and salinity were measured in situ at the designated water quality monitoring stations.  General observation, weather conditions, with the sampling time, date and location were marked on the field record sheet.

 

3.5.2               Water samples were taken from each monitoring station for laboratory analysis.  The sample identification number, sampling location, data, time, project name and parameter for analyses were required to label on all sampling bottles.

 

3.5.3               The samples were placed in a cooler with ice (to 4°C without being frozen) and kept away from sunlight.  Samples were submitted to a Hong Kong Accreditation Scheme (HOKLAS) or other international accredited laboratory for analysis within 24 hours of sampling.

 

 

3.6                   Maintenance / Calibration

 

Calibration of In-Situ Instruments

 

3.6.1               All in situ monitoring instruments were checked, calibrated and certified by a laboratory accredited under HOKLAS or any other international accreditation scheme before use and subsequently re-calibrated at three monthly intervals throughout all stages of the water quality monitoring programme.  Responses of sensors and electrodes were checked with certified standard solutions before each use.  Wet bulb calibration for a DO meter were carried out before measurement at each monitoring location.

 

Laboratory Analysis

 

3.6.2               All laboratory work were carried out by ALS Technichem Pty Ltd (HOKLAS accredited laboratory). Water samples of about 3 bottles of (1,000 ml x 1, 250 ml x 1 brown bottle and 100 ml x 1 sulfuric preserved) were collected at the monitoring and control stations for carrying out the laboratory determinations.  The determination work will be start within 24 hours after collection of the water samples. The analyses shall follow the standard methods according to APHA Standard Methods for the Examination of Water and Wastewater, 19th Edition, or an equivalent method approved by EPD.

 

Table 3.3 Analytical Methods to be applied to Water Quality Samples

 

Determinant, unit

Standard Method

Reporting Limit

Suspended Solids

APHA 2540 D

2 mg/L

Nitrate Nitrogen

APHA 4500-NO3-

0.01 mg/L

Nitrite Nitrogen

APHA 4500-NO2-

0.01 mg/L

Ammonia Nitrogen

APHA 4500-NH3(D)

0.01 mg/L

Total phosphorus

ASTM D515-88B

0.02 mg/L*

Chlorophyll a

APHA 10200 H2 &3

0.5 µg/L

 

Remarks: The detection limit for TP has been revised to 0.02 mg/L after reviewing the baseline data.

 

3.7                   QA/QC Procedure

 

3.7.1               ALS Technichem Pty Ltd. has comprehensive quality assurance and quality control programmes.  For QA/QC procedures of parameters, one duplicate sample was analysed for every batch of 20 samples as required by HOKLAS.

 

3.8                   Results and Observations

 

3.8.1               Baseline stream and marine water quality monitoring were carried out 3 days per week for 4 weeks prior to commencement of works from 26 November 2005 to 21 December 2005.  Baseline monitoring results are presented in Appendices C & D.

 

3.8.2               The weather condition during the baseline monitoring period is generally fine.  No major water pollution source during the baseline monitoring period.

 

3.8.3               Baseline marine water quality monitoring data is compared with the EPD monitoring data (2003 and 2004) at Port Shelter (PM4 and PM9 are the nearest stations to the proposed third golf course at Kau Sai Chau) and presented in Appendix F.  In general, baseline marine water quality monitoring parameters of salinity, DO (surface + middle), DO (bottom), pH, suspended solids and total inorganic nitrogen are very similar to EPD dry season monitoring data in 2003 and 2004.  The average values of turbidity, ammonia nitrogen and chlorophyll a (EPD dry season monitoring data in 2003 and 2004) are comparatively higher than the baseline water quality monitoring data.

 

3.8.4               For total phosphorus, the entire baseline monitoring results is undetectable.  For nitrite nitrogen, approximate 78% monitoring results are also undetectable.  However, the average values of nitrite nitrogen, nitrate nitrogen and total phosphorus (EPD dry season monitoring data in 2003 and 2004) are comparatively lower than the baseline water quality monitoring data.  The baseline water qualities for these parameters represent a worse case scenario in this report.  Although these parameters are detected below their detection limits in most of the time during the whole baseline monitoring period, reported concentrations are also same as the detection limit.  In real situation, those values should below their detection limits.  

 

3.8.5               Control stations are necessary to compare the water quality from potential impacted sites with the ambient water quality.  Control stations shall be located within the same body of water as the impact monitoring stations but shall be outside the area of influence of the works, and as far as practicable, not affected any other works.  M_A and M_B were the established marine control stations to demonstrate the ambient water quality and natural/seasonal variation in Port Shelter which was outside the impact zone of the project.  The action and limit levels shall be reviewed during the operation phase and make reference to the monitoring data of control stations during construction phase is necessary.

 

3.8.6               Tentative impact monitoring programme is based on the tentative construction programme provided by Contractor (Appendix H) and summarizes as follows table.

 

Table 3.4 Tentative Stream and Marine Impact Monitoring Programme (Construction Phase)

 

Major construction activities

Tentative construction period

Tentative monitoring period

Monitoring parameter

Monitoring Locations

Cut & Fill for

Holes (1-18)

Jan 2006 to Feb 2007

Approx. 12 months

DO, Temp., Turbidity, pH, Salinity & SS.

All

Turf establishment

First phase:

July to Sept 2006.

Second phase:

May to Jul 2007

During the turf establishment period where the permanent low flow drainage system is not yet completed.

DO, Temp., Turbidity, pH, Salinity, SS, NO3-N, NO2-N, NH3-N, TIN, TP and selected pesticides#

*

Dredging for RO pipelines

Mid-Feb to Apr 2006

Approx. 1.5 months

DO, Temp., Turbidity, pH, Salinity & SS.

M_RO1, KLW, M_A, M_B

General works (minor)

Jan 2006 to Jul 2008

Whole construction period

DO, Temp., Turbidity, pH, Salinity & SS.

All

        Remarks:

The action and limit level for each parameter is the same as shown in Tables 3.10 & 3.11.

* - There is no detail information from Contractor on the turf establishment programme.  Monitoring location(s) will be selected by the application of nutrients/pesticides areas and quantity to the nearest stream/marine impact monitoring station(s).  The nearest station(s) will be selected for monitoring.  The monthly EM&A programme shall report the actual application and usage of nutrient and pesticides for the justification of monitoring locations during construction phase.

# - For M_RO1, monitoring parameters shall exclude nutrients and selected pesticides as it is outside the impact zone of the new turf establishment area.

 

 

 

 

 

 

 

 

3.8.7               The action and Limit levels have been set in accordance with the Environmental Monitoring and Audit Manual, which states in the following table.

 

Table 3.5 Derivation of Action and Limit Levels for Stream and Marine Waters

 

 Parameters

Action

Limit

DO in mg L-1

(Surface, Middle & Bottom)

Marine Water

Surface and Middle

5 percentile of baseline data for surface and middle layer

 

Bottom

5 percentile of baseline data for bottom layer

Marine Water

Surface and Middle

1 percentile of baseline data for surface and middle layer or 5 mg/L for FCZs

Bottom

1 percentile of baseline data for bottom layer or 2 mg/L for FCZs

DO in mg L-1 (mid-depth)

Inland Water

5 percentile of baseline data

Inland Water

4 mg/L

pH (depth-averaged)

 

N/A

 

N/A

Inland Water

6.0 - 9.0

Marine Water

6.5 - 8.5

SS in mg L-1 (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

Turbidity in NTU (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

Salinity in ppt (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

Ammonia Nitrogen (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

Nitrate Nitrogen (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

Nitrite Nitrogen (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

TIN in mg L-1 (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

Total Phosphorus in mgL-1 (depth-averaged)

95 percentile of baseline data

99 percentile of baseline data

 

 

3.8.8               Tables 3.6 a-m and 3.7 a-l present the average value, minimum and maximum for baseline marine water monitoring results (9 monitoring stations) and river water quality monitoring results (7 monitoring stations) respectively.


Table 3.6a – Marine Water Quality - Average, minimum and maximum values for water depth

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Water Depth (m)

Average

5.0

13.1

7.5

7.7

9.7

9.6

10.2

16.5

11.3

 

Min

4.3

12.5

7.2

7.2

9.3

8.5

9.2

15.3

9.3

 

Max

5.8

13.9

8.2

8.5

10.0

10.4

11.0

18.0

12.8

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Water Depth (m)

Average

5.0

13.4

7.5

7.8

9.5

9.7

10.2

16.4

11.0

 

Min

4.0

12.6

6.3

7.2

8.8

9.2

8.9

15.1

9.8

 

Max

5.8

13.9

7.9

8.3

10.1

10.3

11.1

17.8

12.5

Tidal Average

 

5.0

13.2

7.5

7.8

9.6

9.7

10.2

16.5

11.2

 

Table 3.6b – Marine Water Quality - Average, minimum and maximum values for water temperature

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Temp. (oC)

Average

20.8

20.7

20.3

20.4

20.4

20.4

20.5

20.6

20.8

 

Min

17.5

17.7

16.7

17.5

17.3

17.3

17.2

17.2

17.7

 

Max

23.4

23.2

23.1

23.3

23.4

23.2

23.3

23.1

23.2

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Temp. (oC)

Average

20.8

20.6

20.4

20.4

20.4

20.5

20.6

20.7

20.9

 

Min

17.5

17.1

16.8

17.3

17.3

17.5

17.5

17.2

17.7

 

Max

23.5

23.4

23.5

23.5

23.7

23.5

23.7

23.6

23.5

Tidal Average

 

20.8

20.8

20.4

20.4

20.5

20.5

20.6

20.7

20.9

 

Table 3.6c – Marine Water Quality - Average, minimum and maximum values for Salinity

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Salinity (ppt)

Average

32.8

33.0

33.0

33.1

33.1

33.2

33.2

33.4

33.4

 

Min

28.3

28.8

32.2

32.1

32.1

32.1

27.5

32.0

31.9

 

Max

34.2

34.4

34.0

34.0

34.0

34.0

34.0

33.9

34.0

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Salinity (ppt)

Average

32.8

33.0

32.6

32.9

33.1

32.9

33.2

33.4

33.5

 

Min

28.5

32.2

22.3

30.2

32.1

24.1

25.7

32.4

32.0

 

Max

34.3

34.2

34.1

34.2

34.3

34.2

34.2

34.3

34.3

Tidal Average

 

32.8

33.0

32.8

33.0

33.1

33.1

33.2

33.4

33.5

Table 3.6d – Marine Water Quality - Average, minimum and maximum values for Dissolved Oxygen

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

DO (mg/L)

Average

7.1

7.1

7.0

7.1

7.0

7.1

7.0

6.9

6.9

Surface & Middle

Min

5.2

6.1

5.6

6.2

5.3

6.2

5.8

5.7

6.1

 

Max

8.7

8.2

8.1

8.3

8.3

8.4

8.4

8.5

8.4

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

DO (mg/L)

Average

7.0

7.0

7.3

7.1

7.0

7.1

7.0

6.9

6.9

Bottom

Min

5.1

6.2

6.4

6.3

6.5

6.2

5.9

5.9

6.3

 

Max

8.6

8.3

8.3

8.4

8.4

8.0

8.2

8.0

8.4

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

DO (mg/L)

Average

7.2

6.9

7.0

7.0

6.9

7.0

7.0

7.0

6.8

Surface & Middle

Min

5.6

5.1

5.3

6.2

6.1

6.0

5.8

6.1

5.7

 

Max

8.3

8.3

8.3

8.4

8.2

8.2

8.3

8.4

8.1

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

DO (mg/L)

Average

7.3

6.9

7.2

6.9

7.0

7.0

7.0

7.0

6.8

Bottom

Min

5.9

5.3

6.2

6.2

6.1

5.9

5.8

6.0

5.8

 

Max

8.4

8.0

8.2

8.1

8.3

8.2

8.2

8.3

8.2

Tidal Average

DO (Surface & Middle)

7.1

7.0

7.0

7.0

6.9

7.0

7.0

6.9

6.8

DO (Bottom)

7.1

7.0

7.2

7.0

7.0

7.0

7.0

6.9

6.9

 

Table 3.6e – Marine Water Quality - Average, minimum and maximum values for pH

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

pH

Average

8.2

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

 

Min

8.1

8.1

8.0

8.1

8.1

8.1

8.2

8.2

8.1

 

Max

8.4

8.4

8.4

8.4

8.4

8.4

8.5

8.4

8.5

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

pH

Average

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

 

Min

8.0

7.9

8.1

8.1

8.1

8.2

8.2

8.1

8.0

 

Max

8.5

8.5

8.5

8.4

8.4

8.4

8.4

8.4

8.5

Tidal Average

 

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

8.3

 

Table 3.6f – Marine Water Quality - Average, minimum and maximum values for Turbidity

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Turbidity (NTU)

Average

1.5

1.7

2.3

1.9

1.9

2.2

2.2

2.1

1.6

 

Min

< 1.0

< 1.0

1.1

< 1.0

< 1.0

< 1.0

< 1.0

< 1.0

< 1.0

 

Max

2.5

4.6

6.5

3.3

3.2

3.7

7.8

4.1

3.8

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

Turbidity (NTU)

Average

2.1

1.8

2.1

2.0

2.0

1.9

2.0

2.1

1.8

 

Min

< 1.0

< 1.0

< 1.0

< 1.0

< 1.0

< 1.0

1.1

< 1.0

< 1.0

 

Max

8.7

3.2

3.2

3.3

4.2

2.7

3.3

3.8

3.3

Tidal Average

 

1.8

1.7

2.2

2.0

2.0

2.1

2.1

2.1

1.7

 

Table 3.6g – Marine Water Quality - Average, minimum and maximum values for Suspended Solids

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

SS (mg/L)

Average

3

3

4

2

3

3

3

3

2

 

Min

< 2

< 2

< 2

< 2

< 2

< 2

< 2

< 2

< 2

 

Max

6

7

15

3

4

3

6

7

3

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

SS (mg/L)

Average

3

3

2

3

3

3

3

3

2

 

Min

< 2

< 2

< 2

< 2

< 2

< 2

< 2

< 2

< 2

 

Max

6

5

3

4

5

5

4

11

5

Tidal Average

 

3.1

2.7

3.3

2.6

2.8

2.5

2.8

3.2

2.3

 

Table 3.6h – Marine Water Quality - Average, minimum and maximum values for Ammonia Nitrogen

Mid-Ebb

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

NH3-N (mg/L)

Average

0.01

0.01

0.01

0.01

0.01

0.01

0.01

0.01

0.01

 

Min

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

 

Max

0.01

0.03

0.04

0.02

0.03

0.02

0.01

0.02

0.03

Mid-Flood

 

M_RO1

KLW

M_A

M_Marsh

TTC

M_BP

M_Coral

M_B

KS

NH3-N (mg/L)

Average

0.01

0.01

0.01

0.01

0.01

0.01

0.01

0.01

0.01

 

Min

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

< 0.01

 

Max