1.0               INTRODUCTION

 

Leader – Wai Kee (C&T) Joint Venture (LWKJV) appointed Environmental Team (ET) of ETS-Testconsult Limited (ETL) to undertake the Environmental Monitoring and Audit (EM&A) for Remaining Engineering Infrastructure Works for Pak Shek Kok Development Package 2A (Contract No.: TP 37/03).

 

In accordance with the Section 10 of Environmental Permit to Construct and Operate a Designate Project (EP-108/2001/AEP-108/2001), EM&A programme as set out in the EM&A Manual is required to be implemented. In accordance with the EM&A manual, environmental monitoring of air quality and noise is required for the Project. The EM&A requirement for each parameter are described in details in subsequent sections, including:

 

·   All monitoring parameters;

·   Action and Limit levels for all environmental parameters;

·   Event-Action Plans;

·   Environmental mitigation measures, as recommended in the project EIA study report;

·   Environmental requirements in contract documents.

 

This monthly EM&A report summarizes the impact monitoring results and audit findings of the EM&A program during the reporting period from 01 to 31 July 2006.

 

 

2.0               PROJECT INFORMATION

 

2.1               Background

 

Remaining Engineering Infrastructure Works for Pak Shek Kok Development Package 2A (Contract No.: TP 37/03) was planned and designed by the Civil Engineering and Development Department (CEDD).

 

As the main Contractor of the captioned project: contracted by, LWKJV will follow the environmental monitoring recommendation stated at the EM&A Manual that was prepared with reference to the EIA Study for Feasibility Study on the Pak Shek Kok Development Area (PSKDA) Environmental Monitoring and Audit Manual under Agreement No. CE 90/96.

 

2.2               Site Description

 

Generally, the construction site is located at Pak Shek Kok development area. Surrounding the construction site, there are two air sensitive receivers: HKIB Staff Accommodation and Cheung Shue Tan Village and three noise sensitive receivers: HKIB Staff Accommodation, CUHK Residence No.10 and Cheung Shue Tan Village.

 

Figure 1and 2 show the noise and air monitoring locations of this project.

 

2.3               Construction Programme

 

Details of construction programme are shown in Appendix F.

 

            2.4         Project Organization and Management Structure

 

The organization chart and lines of communication with respect to the on-site environmental management and monitoring program are shown in Appendix A.

 

            2.5        Contact Details of Key Personnel

 

The key personnel contact names and telephone numbers, and construction programme are shown in table 2.1.

 

Table 2.1      Contact Details of Key Personnel

Organization	Project Role	Name of Key Staff	Tel. No.	Fax No.
CEDD	Mr. M. S. Lam	Employer	2158 5630	2693 2918
Hyder	Mr. Herman Fong	Engineer	2603 6638	2603 7883
LWJV	Mr. T. T. Wong	Project Manager	2442 1123	2442 9733
Hyder	Ir. Coleman Ng	Independent Environmental Checker	2911 2233	2805 5028
ETL	Mr. C.L. Lau	Environmental Team Leader	2946 7791	2695 3944

 

 

3.0       Construction Progress in this reporting month

 

The site area of this project is shown in Appendix G.

 

A summary of the major construction activities undertaken in this monitoring month is shown in Table 3.1. The implementation of corresponding mitigation measures is summarized in Table 3.2.

 

Table 3.1      Major Construction Activities in this reporting month

Major Construction Activity	Location
Drainage works (Excavation, pipe lying and breaking)	Section 1 & 2
Construction of column and wall	Voided Abutment, RE Wall and pile cap at North Abutment,  and Retaining wall No.1
Construction of MLS Subway pump ramp and barrel	SA3
Construction of foundation slab for Toilet No.2	Toilet No.2 at Public Plaza
Drainage work, landscape softworks, finishing works and installation of precast concrete planter units and concreting of insitu concrete planter	Section 7 & 8 (Promenade)
Footpath construction, desilting and CCTV inspection of the completed drainage works	Section 5 (Road L4)
Installation additional valves for watermains	Cycle track at Section 6
Installation of lighting footing and duct, finishing the landscape structure	Proposed Landscape Node P1, P2 & P3
Construction of mass concrete coping	Proposed Landscape Node P1, P2 & P3
Construction of bus bays	Section 10 of the Works
Setting back of existing stockpile mound adjacent to the proposed cycle track	Housing Site 4
Filling of soil mix at planter	Node 1
Further in-situ concreting of section above +2.5mPD	Proposed Public Landing Steps

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Table 3.2      Implementation of Environmental Mitigation Measures

General construction works

·  Effective water sprays used on the site at potential dust emission sources such as haul roads and unpaved areas; ·  The heights from which fill materials are dropped should be controlled to a practical height to minimize the fugitive dust arising from unloading; ·  Minimize of exposed soil areas to reduce the potential for increased siltation and contamination of run-off; ·  Water, hydro-seed or cover the open stockpile and exposed loose soil areas by using clean tarpaulin sheets; ·  Provide proper and efficient drainage facilities (e.g. wheel washing facilities) and sedimentation system to ensure that site runoff should be treated before discharged to drains; ·  Remove the sand/rubbish accumulated in the drain/channel regularly; ·  Use and maintenance of silt curtain properly during marine works; ·  Provide good site practice (e.g. selection of quieter plant and working methods and reduction in number of plant operating in critical areas close to NSRs) to limit noise emissions at source; ·  Remove the construction waste accumulated inside or outside the site regularly.

 

4.0               AIR QUALITY MONITORING

 

4.1        Monitoring Requirement

 

1-hour and 24-hour TSP monitoring were required to conducted to monitor the air quality, at designated monitoring locations:

-            HKIB Staff Accommodation (on ground floor near the entrance facing south-east);

-            Cheung Shue Tan Village (near the outer building, temple) for 1-hr TSP monitoring;

-             Cheung Shue Tan Village (in front of Man Kee Store) for 24-hr TSP monitoring;

-             Near Wen Chih Tang at the CUHK.

 

            4.2        Monitoring Equipment

 

                        Continuous 24-hour TSP air quality monitoring was performed using a GMWS2310 High Volume Air Sampler (HVS) located at each of the designated monitoring station.  One portable dust meter was used to carry out the 1-hour TSP monitoring.  Table 4.1 summarizes the equipment used in the air quality monitoring programme. A copy of the calibration certificates for the HVS and portable dust meter are attached in Appendix B1.

 

Table 4.1   Air Quality Monitoring Equipment

Equipment	Model and Make
HVS	Greasby GMWS2310
Calibrator	Tisch TE-5025A
1-hour TSP Dust Meter	TSI Model 8520 Dust TrakTM Aerosol Monitor

 

4.3        Monitoring Parameters, Frequency and Duration

 

                        Table 4.2 summarizes the monitoring parameters, monitoring duration and frequencies of air quality monitoring.

 

                        Table 4.2         Monitoring parameters, duration, frequencies of impact air quality monitoring

Parameter	Duration	Frequency
24-hr TSP	24 hr (0000-2400)	Once every six days
1-hr TSP	1 hr (0700-1900)	Three times every six days

 

4.4        Monitoring Locations and Schedule

 

                        Table 4.3 tabulates the air quality monitoring locations of this project.

 

Table 4.3          Air quality monitoring locations

Monitoring stations	Locations
AM1	HKIB Staff Accommodation (on ground floor near the entrance facing south-east) for 1-hr TSP monitoring
AM3	Cheung Shue Tan Village (near the outer building, temple) for 1-hr TSP monitoring
AM3A	Cheung Shue Tan (in front of Man Kee Store) for 24-hr TSP monitoring
AM5	Near Wen Chih Tang at the CUHK

 

The air quality monitoring schedule for 24-hr and 1-hr TSP monitoring at designated monitoring locations is summarized in table 4.4.

 

                        Table 4.4           Monitoring Schedule for the air quality monitoring stations

Air quality monitoring stations	Location	Monitoring Period
		24-hr TSP						1-hr TSP
		Start				Finish		Date	Start	Finish
		Date		Time		Date	Time
AM1	HKIB Staff Accommodation	---						04/07/06	10:45	11:45
								06/07/06	10:15	11:15
								08/06/06	10:00	11:00
								11/07/06	09:30	10:30
								13/07/06	08:30	09:30
								15/07/06	09:15	10:15
								18/07/06	09:00	10:00
								20/07/06	09:30	10:30
								22/07/06	11:00	12:00
								25/07/06	09:20	10:20
								27/07/06	08:40	09:40
								29/07/06	09:40	10:40
AM3	Cheung Shue Tan Village (Near the outer building, temple)	---						04/07/06	13:06	14:06
								06/07/06	13:00	14:00
								08/06/06	13:00	14:00
								11/07/06	10:55	11:55
								13/07/06	14:15	15:15
								15/07/06	14:00	15:00
								18/07/06	10:20	11:20
								20/07/06	13:00	14:00
								22/07/06	13:00	14:00
								25/07/06	15:10	16:10
								27/07/06	13:30	14:30
								29/07/06	13:30	14:30
AM5	Near Wen Chih Tang at the CUHK	---						04/07/06	14:28	15:28
								06/07/06	16:00	17:00
								08/06/06	14:20	15:20
								11/07/06	18:00	19:00
								13/07/06	13:00	14:00
								15/07/06	15:20	16:20
								18/07/06	15:00	16:00
								20/07/06	14:30	15:30
								22/07/06	14:20	15:20
								25/07/06	17:06	18:06
								27/07/06	14:50	15:50
								29/07/06	15:30	16:30
AM1	HKIB Staff Accommodation	04/07/06	10:55		05/07/06		10:53	---
		10/07/06	14:30		11/07/06		14:30
		15/07/06	09:20		16/07/06		08:22
		21/07/06	14:00		22/07/06		13:09
		27/07/06	08:45		28/07/06		08:40
AM3A	Cheung Shue Tan (in front of Man Kee Store)	04/07/06	13:15		05/07/06		13:52	---
		10/07/06	15:05		11/07/06		15:05
		15/07/06	14:06		16/07/06		14:19
		21/07/06	14:20		22/07/06		14:27
		27/07/06	13:36		28/07/06		14:01
AM5	Near Wen Chih Tang at the CUHK	04/07/06	14:38		05/07/06		14:48	---
		10/07/06	14:45		11/07/06		14:45
		15/07/06	16:25		16/07/06		16:54
		21/07/06	14:40		22/07/06		14:56
		27/07/06	14:55		28/07/06		14:59

 

 

4.5       Monitoring Methodology

 

            4.5.1     24-hour TSP Monitoring

 

Instrumentation

High volume sampler, as HVS, (Greasby GMWS2310) complete with appropriate sampling inlets are employed for 24-hour TSP.  The sampler is composed of a motor, a filter holder, a flow controller and a sampling inlet and its performance specification complies with that required by USEPA standard Title 40, Code of Federation Regulations Chapter 1 (Part 50).

 

Installation

The installation of HVS refers to the requirement stated in EM&A Manual.

 

Operation/Analytical Procedures

Operating/analytical procedures for the operation of HVS are as below:

 

Prior to the commencement of the dust sampling, the flow rate of the high volume sampler was properly set (between 0.6m³/min and 1.7m³/min.) in accordance with the manufacturer’s instruction to within the range recommended in USEPA Standard Title 40, CFR Part 50.

 

·       For TSP sampling, fiberglass filters (GA-55) were used.

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

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

·       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.

·       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 holder frame was tightened to the filter holder with swing bolts.  The applied pressure should be sufficient to avoid air leakage at the edges.

·       The programmable timer will be set for a sampling period of 24 hours.  Information was recorded on the record sheet, 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.).

·       After sampling, the filter was transferred from the filter holder of the HVS to a sealed plastic bag and sent to the laboratory for weighting.  The elapsed time was also recoded.

·       Before weighting, all filters were equilibrated in a desiccator for 24 hour with the temperature of 25^oC + 3^oC and the relative humidity (RH) <50% +5%.

 

Maintenance & Calibration

 

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

·       HVS should be calibrated at bi-monthly intervals.

 

4.5.2    1-hour TSP Monitoring

 

Measuring Procedures

 

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

 

·       Set POWER to ON, check the battery indicator to ensure whether the power supply is enough to conduct the TSP monitoring;

·       Calibrate the dust meter by zero check;

·       Set the time constant of the dust meter;

·       Press sample to start the TSP monitoring;

·       Record the maximum, minimum and average reading directly from the dust meter by press Statistics when monitoring complete.

 

Maintenance & Calibration

 

·       1-hr dust meter should be checked at 3-month intervals and calibrated at 1-year intervals throughout all stages of impact air quality monitoring.

 

4.5.3          Wind Data Monitoring

 

Wind data (wind speed and wind direction) were directly extracted from Sha Tin Station (located at Sha Tin Race Course) of Hong Kong Observatory. All wind data during this reporting month are shown in Appendix D.

 

 

4.6       Action and Limit Levels

 

Action and Limit levels for 24-hr TSP and 1-hr TSP derived as illustrated in Table 4.5.

 

Table 4.5           Action and Limit Levels for 24-hr TSP and 1-hr TSP

Monitoring Location	24-hr TSP (mg/m3)		1-hr TSP (mg/m3)
	Action Level	Limit Level	Action Level	Limit Level
AM1	164 *	260 *	325 *	500 *
AM3	---	---	306 **	500 **
AM3A	183 **	260 **	---	---
AM5	174	260	329	500

*   =  Reference to the information contained in the Baseline Monitoring Report submitted under the “Advance Engineering Infrastructure Works for Pak Shek Kok Development – Southern Access Road and Sewage Pumping Station No.3.

** =  Reference to the information contained in the Baseline Monitoring Report submitted under the “Remaining Engineering Infrastructure Works for Pak Shek Kok Development Package 1 – Contract No. TP 35/02.

 

4.7        Event-Action Plans

 

              Please refer to Appendix E for details. 

 

4.8       Results

 

            4.8.1     24-hour TSP Monitoring

 

All monitoring data of 24-hour TSP monitoring is provided in Appendix B2. Graphical presentation of 24-hour TSP monitoring results for the reporting month is shown in Appendix B3.

 

No exceedances of Action and Limit Level of 24-hour TSP monitoring results were recorded during the reporting month.

 

                        4.8.2     1-hour TSP Monitoring

 

1-hour TSP monitoring was carried out at monitoring stations, AM1 and AM3 in the reporting month. All monitoring data of 1-hour TSP monitoring is provided in Appendix B2. Graphical presentation of 1-hour TSP monitoring results for the reporting month is shown in Appendix B3.

 

No exceedances of Action and Limit Level of 1-hour TSP monitoring results were recorded during the reporting month.

 

 

5.0       Noise Monitoring

 

            5.1        Monitoring Requirements

 

As the requirement in EM&A Manual, noise monitoring was conducted at designated monitoring locations:

 

-       HKIB Staff Accommodation (on ground floor near the entrance facing south-east);

-       Cheung Shue Tan Village (near the outer building, temple);

-       CUHK Residence No.10;

-       Near Wen Chih Tang at the CUHK.

 

5.2        Monitoring Equipment

 

Integrating Sound Level Meters were used for noise monitoring. They were Type 1 sound level meters capable of giving a continuous readout of the noise level reading including equivalent continuous sound pressure level (L_eq) and percentile sound pressure level (Lx). They comply with International Electro technical Commission Publications 651:1979 (Type1) and 804:1985 (Type1), and speed in m/s was used to monitor the wind speed.

 

Table 5.1 summarized noise monitoring equipment model being used. A copy of the calibration certificates for noise meters and calibrator are attached in Appendix C1.

 

Table 5.1        Noise Monitoring Equipment

Equipment	Model
Integrating Sound Level Meter	Rion NL-31 Sound Level Meter
Calibrator	Rion NL-73 Sound Level Calibrator
Portable Wind Speed Indicator	TSI Model 8340-M Air Velocity Meter

 

5.3        Monitoring Parameters, duration and Frequency

 

Noise monitoring for the A-weighted levels Leq, L10 and L90 were recorded.  The following guide on the regular monitoring frequency for each monitoring station on a per week basis when noise generating activities are underway:

·       One set of measurements between 0700-1900 hours on normal weekdays (6 consecutive L_eq(5-min));

·       One set of measurements between 1900-2300 hours (3 consecutive L_eq(5-min))*;

·       One set of measurements between 2300-0700 hours of next day (3 consecutive L_eq(5-min))*;

·       One set of measurements between 0700-1900 hours on holidays (3 consecutive L_eq(5-min))*.

 

(*): Noise monitoring to be conducted only when there is construction work.

 

Duration, frequencies and parameters of noise measurement are presented in Table 5.2.

 

Table 5.2     Duration, Frequencies and Parameters of Noise Monitoring

Time period	Duration/min	Parameters	Frequency
Day-time: 0700-1900 hrs on normal weekday	30	Leq, L10, L90	Once per week
Evening-time: 1900-2300 hrs	15	Leq, L10, L90	Once per week
Night-time: 2300-0700 hrs of next day	15	Leq, L10, L90	Once per week
Holiday: 0700-1900 hrs	15	Leq, L10, L90	Once per week

 

5.4        Monitoring Locations and Period

 

In this reporting month, there were four noise monitoring locations: HKIB Staff Accommodation, Cheung Shue Tan Village, CUHK Residence No.10 and Near Wen Chih Tang at the CUHK. The location of the monitoring stations are described in Table 5.3 and depicted in Figure 1.

 

                        Table 5.3        Noise Monitoring Locations

Noise Monitoring station	Location
NM1	HKIB Staff Accommodation (on ground floor near the entrance facing south-east)
NM2	CUHK Residence No.10
NM3	Cheung Shue Tan Village (near the outer building, a temple)
NM8	Near Wen Chih Tang at the CUHK

 

The noise-monitoring programme of monitoring locations (Day-time, Evening-time, Holiday and Night-time) is summarized in Table 5.4.

 

                        Table 5.4           Monitoring Periods for noise monitoring stations

Monitoring stations	Monitoring Period
	Day-time		Evening-time		Holiday		Night-time
NM1	04/07/06	10:50	---	---	---	---	---	---
	11/07/06	13:10	---	---	---	---	---	---
	18/07/06	09:02	---	---	---	---	---	---
	25/07/06	09:25	---	---	---	---	---	---
NM2	04/07/06	17:38	---	---	---	---	---	---
	11/07/06	16:10	---	---	---	---	---	---
	18/07/06	16:15	---	---	---	---	---	---
	25/07/06	18:30	---	---	---	---	---	---
NM3	04/07/06	13:11	---	---	---	---	---	---
	11/07/06	17:15	---	---	---	---	---	---
	18/07/06	10:22	---	---	---	---	---	---
	25/07/06	15:15	---	---	---	---	---	---
NM8	04/07/06	14:33	---	---	---	---	---	---
	11/07/06	18:15	---	---	---	---	---	---
	18/07/06	15:02	---	---	---	---	---	---
	25/07/06	17:25	---	---	---	---	---	---

 

5.5           Monitoring Procedures and Calibration Details

 

                        Operation/Analysis Procedures

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

·      For free field measurement, the meter was positioned away from any nearby reflective surfaces. 

·      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  :  5 mins

·      Prior to and after each noise measurement, the meter was calibrated using a Calibrator for 94 dB at 1000HZ.  If the difference in the calibration level before and after measurement was more than 1dB(A), the measurement would be considered invalid and repeat measurement would be required after re-calibration or repair of the equipment.

·      The wind speed was frequently checked with a portable wind meter.

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

·      Free Field correction to the measurements should be made. Correction factor of +3dB(A) should be made to the free Field measurements.

·      Noise monitoring would be cancelled in the presence of fog, rain, wind with a steady speed exceeding 5m/s, or wind gusts exceeding 10m/s.

 

Maintenance and Calibration

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

·      The meter is sent to be supplier or HOKLAS laboratory to check and calibrated at yearly intervals.

 

5.6       Action and Limit Levels

 

The Action and Limit levels for noise levels derived as illustrated in Table 5.5.

 

Table 5.5        Action and Limit Levels for noise monitoring

Time Period	Time Period	Action	Limit
Normal hours	0700-1900 hrs on normal weekdays	When one documented complaint is received	75 dB(A) *
Holiday	0700-1900 hrs on holidays		70 dB(A) **
Evening-time	1900-2300 hrs on all other days
Night-time	2300-0700 hrs of next day		55 dB(A) **

*    =    Reduce to 70 dB(A) for schools and 65 dB(A) during school examination periods.

**   =    Area Sensitivity Rating (ASR) C is selected from the “Technical Memorandum on Noise from Construction Work Other Than Percussive Piling”.

 

5.7        Event-Action Plans

 

              Please refer to the Appendix E for details. 

 

5.8       Results

 

Only Day-time noise monitoring were carried out at monitoring stations in this reporting month. No Evening-time, Night-time and Holiday noise monitoring were required since no construction works were processed during the night-time period. All noise levels are provided in Appendix C2. Graphical presentation of the monitoring results for the reporting month is shown in Appendix C3.

 

No Day-time noise monitoring results at all monitoring stations exceeded the Action Level since no documented complaints on noise issue were received in this reporting month. Besides, no exceedances in Limit Level were recorded according to the results from Day-time noise monitoring.

 

 

6.0               Wastewater monitoring

 

Effluent Discharge License of this Project is valid from 06 December 2004 (Discharge Licence No.: 3246-Part A and Part B).

 

During this reporting month, wastewater monitoring was carried out at Pak Shek Kok Workshop Area Adjacent to Site Office on 13 July 2006. One wastewater sample was collected from the discharge point during the monitoring. The result of suspended solids content of the wastewater sample was complied the discharge limit of the Discharge Licence. The test report was attached at Appendix I.

 

Since the Discharge Licence required carrying out wastewater monitoring at effluent discharge point quarterly, the next wastewater monitoring should be at October 2006.

 

 

7.0               Environmental Non-conformance

 

7.1              Summary of environmental monitoring

 

No exceedances of Action and Limit Level of 24-hour and 1-hour TSP monitoring results were recorded during the reporting month.

 

No day-time noise level measured at all monitoring stations exceeded the Action and Limit Level in the reporting month. No evening-time, night-time and holiday noise monitoring were required since no construction works were processed during these periods.

 

During this reporting month, wastewater monitoring was carried out at Pak Shek Kok Workshop Area Adjacent to Site Office on 13 July 2006. One wastewater sample was collected from the discharge point during the monitoring. The result of suspended solids content of the wastewater sample was complied the discharge limit of the Discharge Licence.

 

7.2              Summary of Environmental Complaints

 

No environmental complaints were received in this monitoring month.

 

            7.3        Summary of Notification of Summons and Prosecution

There was no notification of summons respect to environmental issues registered in this month.

 

 

8.0        SITE INSPECTION

 

Weekly site inspections were carried out by the ET in this reporting month (08, 13, 21 and 29 July 2006). Monthly joint site inspection at 21 July 2006 was carried out by Engineer’s Representative, IEC and LWKJV. The implementation status of the mitigation measures on site inspections in this reporting month is presented in Appendix H.

 

8.1                Summary of the site inspection findings and Action(s) taken by LWKJV and ET

 

Summaries of the site inspection findings in this reporting month are shown in Table 8.1.

 

Table 8.1     The summary of the site inspection findings and Action(s) taken by LWKJV and ET

Item	Aspects	Findings	Action(s) taken by LWKJV	ET Verification
1	Air	Stockpiles at SA3 were found covered improperly during the weekly site inspections on 08/07/06 and 13/07/06.	LWKJV replied to hydro-seed the stockpiles as soon as possible.	Since the stockpiles were found to be hydro-seeded during the subsequent weekly site inspection (21/07/06), no further verification was required to be taken by ET.
2	Air	Silt and sand track was observed on the public road between SA1 and SA3 during weekly site inspection on 21/07/06.	LWKJV replied to clean up the road immediately.	During the subsequent weekly site inspection, no silt and sand track was observed and hence no further verification was required.
3	Air	Stockpiles at SA1 were found without cover during weekly site inspections on 21/07/06 and 29/07/06.	LWKJV replied to cover the stockpiles with tarpaulin sheets to avoid dust generation.	Since the finding was still noted during the last inspection of this reporting month, it will be verified during the first weekly site inspection of the coming month.
4	Water	Follow up action to the finding of previous month, damaged part of silt curtain at Node 2 was found to have repaired during weekly site inspection on 21/07/06.	Since the finding was improved, no further action was required to be taken by LWKJV.	Since the finding was improved, no further ET verification was required.
5	Water	Storm water was found to be accumulated at Node 1 and SA1 during weekly site inspection on 08/07/06.	LWKJV replied to provide temporary ditches to drain the accumulated storm water out.	During the subsequent weekly site inspection on 13/07/06, no storm water was found at Node 1and SA1. Hence, no further verification was required.
6	Water	Wastewater was found directly discharged to u-channel during weekly site inspection on 29/07/06.	LWKJV replied to divert the wastewater to sedimentation tank before discharge.	Since the finding was observed at the last inspection of this reporting month, it will be verified during the first weekly site inspection of the coming month.

 

Item	Aspects	Findings	Action(s) taken by LWKJV	ET Verification
7	Water	Manhole at SA3 was found full of silt and mud during weekly site inspection on 13/07/06.	LWKJV replied to clean up the silt and mud inside the manhole immediately.	During the subsequent weekly site inspection on 21/07/06, no silt and mud was found inside the manhole. Since the finding was improved, no further verification was required.
8	Water	Stagnant water was accumulated at Workshop during weekly site inspection on 29/07/06.	LWKJV replied to provide temporary ditches to drain the accumulated storm water out.	Since the finding was observed at the last inspection of this reporting month, it will be verified during the first weekly site inspection of the coming month.
9	Water	Muddy water was observed at cycle track near Ma Liu Shui site entrance during weekly site inspection on 29/07/06.	LWKJV replied to clean up the muddy water immediately.	Since the finding was observed at the last inspection of this reporting month, it will be verified during the first weekly site inspection of the coming month.
10	Chemical	A 200L chemical container was found at SA3 without drip tray during weekly site inspection on 21/07/06.	LWKJV replied to relocate the chemical container to an appropriate chemical storage area.	During the subsequent weekly site inspection on 29/07/06, the chemical container was removed.
11	Chemical	Follow up action to the finding of previous month, an appropriate chemical storage area was provided at Workshop during weekly site inspection on 27/07/06.	Since the finding was improved, no further action was taken by LWKJV.	Since the finding was improved, no further verification was required to be taken by ET.
12	Site Practice	Valid CNP was recommended to be post on the notice board of site office during weekly site inspection on 21/07/06..	LWKJV replied to post the valid CNP immediately.	Since the valid CNP was found post during weekly site inspection on 29/07/06, the finding was improved and no further verification was required.

 

 

8.2                Status of Environmental Licensing and Permitting

 

All permits/licenses valid in this reporting month are summarized in Table 8.2.

 

Table 8.2           Summary of environmental licensing and permit status

Description	Permit No.	Valid Period		Section
		From	To
Construction Noise Permit for the Construction Works of the Project at Pak Shek Kok Development Package 2A, Tai Po	GW-RN0006-06	26/01/06	25/07/06	Group A Two Poker, vibratory, hand-held (CNP170) Two Concrete lorry mixer (CNP044) One Excavator, tracked (CNP081)   Group B One Dump Truck (CNP067) One Excavator, tracked (CNP081)   Group C One Asphalt Paver (CNP004) One Roller, Vibratory (CNP186) One Road Roller (CNP185) One Dump Truck (CNP067)   Group D One Dump Truck (CNP067) One Excavator, tracked (CNP081) One Crane, mobile (diesel) (CNP048) One Lorry with crane
Construction Noise Permit for Reclamation area of Science Park Phase 2 & 3, Pak Shek Kok, N.T.	GW-RN0305-06	17/06/06	16/12/06	Group A Two Derrick Barge (CNP061) One Tug Boat (CNP221) One Generator, standard (CNP101)   Group B Two Excavator, tracked (CNP081) Two Dump truck (CNP067) One Generator, standard (CNP101)

 

 

Description	Permit No.	Valid Period		Section
		From	To
Construction Noise Permit for the use of Powered Mechanical Equipment for the Purpose of carrying out Construction Work other than Percussive Piling and/or the carrying out of prescribed Construction Work	GW-RN0240-06	30/05/06	29/12/06	Group A Two Poker, vibrator, hand-held (CNP170) Two Concrete pump, lorry mounted (CNP047) Two Concrete lorry mixer (CNP044)   Group B One Dump Truck (CNP067) One Excavator, tracked (CNP081) One Roller, vibratory   Group C One Asphalt Paver (CNP004) One Roller, Vibratory (CNP186) One Road Roller (CNP185) One Dump Truck (CNP067)   Group D One Dump Truck (CNP067) One Excavator, tracked (CNP081) One Crane, mobile (diesel) (CNP048) One Lorry with crane
Construction Noise Permit for the Construction Works of the Project at Pak Shek Kok Development Package 2A, Tai Po	GW-RN0388-06	27/07/06	26/01/07	Group A Two Poker, vibratory, hand-held (CNP170) Two Concrete lorry mixer (CNP044) One Excavator, tracked (CNP081)   Group B One Dump Truck (CNP067) One Excavator, tracked (CNP081)   Group C One Asphalt Paver (CNP004) One Roller, Vibratory (CNP186) One Road Roller (CNP185) One Dump Truck (CNP067)   Group D One Dump Truck (CNP067) One Excavator, tracked (CNP081) One Crane, mobile (diesel) (CNP048) One Lorry with crane
Construction Noise Permit for the use of Powered Mechanical Equipment for the Purpose of carrying out Construction Work other than Percussive Piling and/or the carrying out of prescribed Construction Work	GW-RN0307-06	21/06/06	20/12/06	Group A One Derrick Barge (CNP061) Four Dump truck, 5.5 tonne < gross vehicle weight < 38 tonne One Excavator, tracked (CNP081) One Generator, standard (CNP101)   Group B One Derrick Barge (CNP061) One Tug Boat (CNP221) One Generator, standard (CNP101)
Construction Noise Permit for Ma Liu Shui Bridge at Sui Cheung Street adjacent to Ma Liu Shui	GW-RN0347-06	26/06/06	08/07/06	One Crane, mobile (diesel) (CNP048) Two Lorry with crane Two welding set
Wastewater Discharge License	3246 – Part A	06/12/04	05/12/09	Discharge of trade Effluent, surface run-off and all other wastewater arising from the construction site and sedimentation tank to Coastal water or communal drain for the carriage of surface drainage water.
Wastewater Discharge License	3246 – Part B	06/12/04	05/12/09	Discharge of trade Effluent, surface run-off and all other wastewater arising from the construction site and on-site aerobic waste water treatment system to soak-away pit.
Chemical Waste Producer	5113-729-LL1113-01	24/09/04	---	Spent lubricating oil, spent battery parts containing heavy metals

 

 

8.3                Recommendations on site inspection findings in Site Inspections of this month

 

Based on the site inspection findings, the recommendations are as below:

·       All stockpiles should be covered with clean tarpaulin sheets, spraying with water or hydro-seeding to avoid wind and water erosion;

·       The heights from which fill materials are dropped should be controlled to a practical height to minimize the fugitive dust arising from unloading;

·       Minimize of exposed soil areas to reduce the potential for increased siltation and contamination of run-off;

·       Checking and maintaining all the site machines to prevent dust emission;

·       Providing briefing to the concerned site staff on remedial actions, such as handling method of chemicals and chemical waste;

·        Use and maintenance of silt curtain properly during marine works;

·       Provide good site practice (e.g. selection of quieter plant and working methods and reduction in number of plant operating in critical areas close to NSRs) to limit noise emissions at source;

·       Maintain good waste management at the site.

 

 

9.0               Waste Management

 

9.1        Waste Management Audit

 

Waste management audit was carried out by the ET on a weekly basis. The implementation status of the mitigation measures on waste management in this reporting month is presented in Appendix H.

 

9.2                Records of Waste Quantities

 

All type of wastes arising from the construction work are classified into the following:

·       General refuses;

·       Chemical waste;

·       Construction & demolition (C&D) material.

 

The quantities of waste for disposal in this month are summarized in Table 9.1.

 

Table 9.1           Summary of Quantities of Waste for Disposal in this reporting month

Type of Waste		Quantity	Disposal Location	Cumulative Quantity
Inert C&D Materials	Total Quantity Generated (m3)	3000	Reused in the Contract	113365
	Broken Concrete (m3)	0	N/A	865
	Reused in the Contract (m3)	3000	N/A	112500
	Reused in other Projects (m3)	0	N/A	0
	Disposal as Public Fill (m3)	0	N/A	0
C&D Waste	Metals (1000kg)	0.050	N/A	37.565
	Paper/Cardboard Packaging (1000kg)	0.100	N/A	1.136
	Plastics (1000kg)	0.010	N/A	0.043
	Chemical Waste (1000kg)	0.000	N/A	3.000
	Other, e.g. General Refuse (1000kg)	48.37	SENT	246.98

 

 

10.0      Implementation Status

 

10.1      Implementation Status of Environmental Mitigation Measures

               

LWKJV has been implementing the required environmental mitigation measures according to the Mitigation Protection Measures stated in Implementation Schedule of the EM&A Manual. The implementation status of the environmental mitigation measures in this reporting month is presented in Appendix H.

 

Air Quality

The Contractor was reminded to water or cover all the stockpiles by using clean tarpaulin sheets. The Contractor was also reminded to cleanup the access road regularly to avoid dust emission and provide effective wheel washing facilities.

 

Noise

All mitigation measures stated in Appendix H were implemented properly in this reporting month.

 

Water Quality

The Contractor was reminded to provide more effort to implement mitigation measures, such as diverting site runoff to suitable treatment processes before discharge, sedimentation system and drainage facilities.

 

Waste Management

LWKJV has been implementing most mitigation measures on waste management.

 

10.2            Implementation Status of Event and Action Plan

 

There were no exceedances in air quality and noise monitoring parameters recorded in this monitoring month. No further mitigation measures were required.

 

10.3      Implementation Status of Environmental Complaint Handling

 

            No complaints had been received during this monitoring month.

 

 

11.0      Conclusion

 

Impact monitoring of air quality and noise were carried out at designated locations in accordance with the EM&A Manual in this reporting month.

 

According to the summary of air and noise monitoring results, no exceedances of Action and Limit Level of 24-hour and 1-hour TSP monitoring results were recorded during the reporting month. Besides, No Day-time noise level measured at all monitoring stations exceeded the Action and Limit Level in the reporting month. No Evening-time, Night-time and Holiday noise monitoring were required since no construction works were processed during these periods.

 

During this reporting month, wastewater monitoring was carried out at Pak Shek Kok Workshop Area Adjacent to Site Office on 13 July 2006. One wastewater sample was collected from the discharge point during the monitoring. The result of suspended solids content of the wastewater sample was complied the discharge limit of the Discharge Licence.

 

According to the ET weekly site inspection and IEC monthly site audit carried out this month, it indicated that site practices of the LWKJV were generally undertaken in an environmentally acceptable manner and the overall site environmental performance was satisfactory.

 

 

12.0            Future Key Issues

 

12.1            Upcoming EM&A Schedule in coming two months

 

The Proposed EM&A program in coming two months are presented as following table:

 

Table 12.1         Upcoming EM&A Schedule in coming two months

Type of Monitoring	August 2006	September 2006
Noise Monitoring (Day-time)	01, 08, 15, 22, 29	05, 12, 19, 26
1-hour TSP	01, 03, 05, 08, 10, 12, 15, 17, 19, 22,24,26, 29, 31	02, 05, 07, 09, 12, 14, 16, 19, 21, 23, 26, 28, 30
24-hour TSP	02, 08, 14, 19, 25, 31	06, 12, 18, 23, 29
Site Inspection	03, 10, 17, 24, 31	07, 14, 21, 28

 

12.2           Upcoming construction works schedule in the coming months

 

The major construction works planned to be carried out in next two months and their possible impact is tabulated (Table 12.2) for reference.

 

Table 12.2         Construction Plan in the coming months

Month

Works Planned to be Carried Out

Between August and September 2006

§   Drainage Works (excavation, pipe lying and breaking) at Section 1 and 2 (Ma Liu Shui), 7 and 8 (Promenade) of the Works; §   Installation of watermains at Section 1 of the Works; §   Steel fixing and concreting of beam and wall at Voided Abutment, construction of RE wall and pile cap at North Abutment, and erection of formwork and falsework for deck costruction for the Alternative Design of the proposed Ma Liu Shui Bridge; §   Construction of Retaining Wall No.1; §   Construction of pedestrian ramps and barrel of the proposed Ma Liu Shui Subway (Alternative Design); §   Construction of wall and columns, and installation of sewerage and drainage system for Toilet No.2; §   Paving of footpath at the proposed Road L4 under Section 5 of the Works; §   Installation of additional valves and connection for watermains at the cycle track, pavement construction and fencing erection at Section 6 of the Works; §   Installation of public light footing and duct along the proposed Promenade, construction of hard landscape structures, and CCTV inspection of the completed drainage pipes; §   Hard landscaping works at Section 7 of the Works; §   Constructon of mass concrete coping at the proposed Landscape Node P1, P2 & P3; §   Installation of precast concrete planter and parapet wall units along the proposed Promenade at Section 8 of the Works; §   Construction of in-situ concreting of section above +2.5mPD and shelter foundation at the proposed Public Landing Steps; §   Setting back of surcharge mound at Housing Site 4 as per VO/146; §   Filling of soil mix at planter wall.