contamination assessment plan · 4.5 past si record, (hydro) geology and underground soil profile...

Annex 9A

Contamination Assessment

Plan

Additional Gas-fired Generation Units Project Contamination Assessment Plan 29 October 2015 Environmental Resources Management 16/F, Berkshire House 25 Westlands Road Quarry Bay, Hong Kong Telephone 2271 3000 Facsimile 2723 5660 www.erm.com

Additional Gas-fired Generation Units Project Contamination Assessment Plan Document Code: 0308057_Contamination Assessment Plan_Rev 2.docx

Environmental Resources Management 16/F, Berkshire House 25 Westlands Road Quarry Bay Hong Kong Telephone: (852) 2271 3000 Facsimile: (852) 2723 5660 E-mail: [email protected] http://www.erm.com

Client: Castle Peak Power Company Limited (CAPCO)

Project No: 0308057

Summary: Date: 29 October 2015

This document presents the contamination assessment plan as part of the land contamination impact assessment for the Additional Gas-fired Generation Units Project.

Approved by:

Frank Wan Partner

2 Revised Issue to EPD Var JNG FW 29/10/15

1 Revised Issue to EPD Var JNG FW 13/10/15

0 Issue to EPD Var JNG FW 07/09/15

Revision Description By Checked Approved Date This report has been prepared by Environmental Resources Management the trading name of ‘ERM Hong-Kong, Limited’, with all reasonable skill, care and diligence within the terms of the Contract with the client, incorporating our General Terms and Conditions of Business and taking account of the resources devoted to it by agreement with the client. We disclaim any responsibility to the client and others in respect of any matters outside the scope of the above. This report is confidential to the client and we accept no responsibility of whatsoever nature to third parties to whom this report, or any part thereof, is made known. Any such party relies on the report at their own risk.

Distribution

Internal

Government

Public

CONTENTS

1 INTRODUCTION 1

1.1 BACKGROUND 1 1.2 OBJECTIVES OF THE CAP 1 1.3 STRUCTURE OF THIS CAP 1

2 STATUTORY REQUIREMENTS AND EVALUATION CRITERIA 3

2.1 STATUTORY FRAMEWORK 3 2.2 SELECTION OF RBRG LAND USE SCENARIO 3

3 DESCRIPTION OF THE PROPOSED PROJECT 4

3.1 CONSTRUCTION OF NEW CCGT UNITS 4 3.2 CONSTRUCTION OF WATER INTAKE FACILITY 4 3.3 CONSTRUCTION OF WATER DISCHARGE FACILITY 5 3.4 CONSTRUCTION OF ELECTROCHLORINATION FACILITY 6

4 SITE APPRAISAL FINDINGS 7

4.1 SURROUNDING LAND USE OF BPPS 7 4.2 SITE WALKOVER FINDINGS 7 4.3 REVIEW OF PAST LAND USES 7 4.4 REVIEW OF HISTORICAL SPILLAGE AND LEAKAGE RECORD 11 4.5 PAST SI RECORD, (HYDRO) GEOLOGY AND UNDERGROUND SOIL PROFILE 12

5 SITE INVESTIGATION PLAN 15

5.1 PROPOSED SAMPLING LOCATIONS AND TESTING PARAMETERS 15 5.2 POTENTIAL SITE CONSTRAINTS AND MODIFICATION AT PROPOSED SAMPLING

LOCATIONS 21

6 SAMPLING METHODOLOGY 22

6.1 OVERVIEW 22 6.2 BOREHOLE DRILLING 22 6.3 TRIAL PIT EXCAVATION 23 6.4 SOIL SAMPLING 23 6.5 GROUNDWATER SAMPLING 24 6.6 SAMPLE SIZE 24 6.7 SAMPLE HANDLING AND LABORATORY ANALYSIS 25 6.8 QUALITY ASSURANCE /QUALITY CONTROL SAMPLES 25 6.9 HEALTH AND SAFETY 25

7 CONCLUSIONS 27

7.1 RECOMMENDATIONS 27

ANNEXES ANNEX A SITE LOCATION AND LAND-BASED PROJECT PLAN ANNEX B SELECTED SITE PHOTOGRAPHS AND SITE WALKOVER CHECKLIST ANNEX C REFERENCED AERIAL PHOTOGRAPHS ANNEX D LETTER FROM FSD ON FIRE INCIDENTS, CHEMICAL SPILLAGE AND DG STORAGE ANNEX E PROPOSED SITE INVESTIGATION PLAN ANNEX F PREVIOUS GROUND INVESTIGATION LOGS ANNEX G SCHEMATIC DRAWING OF GROUNDWATER MONITORING WELL ANNEX H RISK-BASED REMEDIATION GOALS

ENVIRONMENTAL RESOURCES MANAGEMENT CASTLE PEAK POWER COMPANY LIMITED 0308057_CONTAMINATION ASSESSMENT PLAN_REV 2.DOCX 29 OCTOBER 2015

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1 INTRODUCTION

1.1 BACKGROUND

Castle Peak Power Company Limited (CAPCO) proposes to install up to two additional gas-fired generation units (combined cycle gas turbine, CCGT) at Black Point Power Station (BPPS) (hereafter referred to as “the Project”) to increase the use of natural gas for local power generation and reduce the carbon intensity of local electricity generation. The Project requires an Environmental Permit from the Hong Kong SAR Government. In relation to this, CAPCO has prepared a Project Profile for application for an Environmental Impact Assessment (EIA) Study Brief, which was submitted to Environmental Protection Department (EPD) on 22 April 2015. The EIA Study Brief (No. ESB-286/2015) (hereafter referred to as “the Study Brief”) was issued by EPD on 2 June 2015.

Environmental Resources Management (ERM) was commissioned by CAPCO for the EIA Study for the proposed Project. In accordance with Clause 3.4.8 and Appendix D2 Requirements for Assessment of Land Contamination of the Study Brief, land contamination assessment shall be carried out for the Project. This Contamination Assessment Plan (CAP), as part of the land contamination assessment, is prepared to identify potential sources of soil and/or groundwater contamination due to past and present operations at the proposed locations of the new CCGT units and other supporting facilities (hereafter referred to as ‘the Site’). This CAP will form part of the EIA submission for the application of the Environmental Permit.

1.2 OBJECTIVES OF THE CAP

This CAP details the past and present land uses of the Site in relation to potential soil and groundwater contamination at the Site and associated works areas. This CAP will also determine the need and methodology for an intrusive site investigation (SI) of the Site to identify the nature and extent of on-site contamination (if any). If required, the findings of the SI will be evaluated and reported in the Contamination Assessment Report (CAR). If the SI results indicate that the soil and/or groundwater to be excavated or extracted for the construction of the Project exceed the Risk Based Remediation Goals (RBRGs) of corresponding future land uses, a Remediation Action Plan (RAP) will also be prepared. All the CAP, CAR and RAP will be submitted to the Environmental Protection Department (EPD) for approval.

1.3 STRUCTURE OF THIS CAP

This section introduces the background of the Project, while subsequent sections are structured according to the assessment methodology for contaminated sites.


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• Section 2 outlines the statutory requirements and the evaluation criteria for land contamination assessment;

• Section 3 describes the project components and the associated construction works;

• Section 4 presents the findings of the site appraisal, including site survey, information on the past and present land uses, etc;

• Section 5 proposes the sampling plan to assess the potential contamination in the Site;

• Section 6 proposes the proposed sampling method;

• Section 7 presents the conclusion and recommendations.

This CAP is also supplemented by the following annexes:

Annex A Site Location and Land-based Project Plan

Annex B Selected Site Photographs and Site Walkover Checklist

Annex C Referenced Aerial Photographs

Annex D Letter from FSD on Fire Incidents, Chemical Spillage and DG Storage

Annex E Proposed Site Investigation Plan

Annex F Previous Ground Investigation Logs

Annex G Schematic Drawing of Groundwater Monitoring Well

Annex H Risk-Based Remediation Goals


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2 STATUTORY REQUIREMENTS AND EVALUATION CRITERIA

2.1 STATUTORY FRAMEWORK

Annex 19 of the Technical Memorandum on Environmental Impact Assessment Process (EIAO-TM) requires that the Project Proponent of a Designated Project shall give consideration to the historical land uses which have the potential to cause or have caused land contamination. As power plant is one of the listed land uses, submission of a CAP to EPD for endorsement is required.

The following key guiding documents are to be referenced for land contamination assessment:

• Guidance Manual for Use of Risk-based Remediation Goals for Contaminated Land Management (the RBRGs Guidance Manual);

• Guidance Note for Contaminated Land Assessment and Remediation (the RBRGs Guidance Note); and

• Practice Guide for Investigation and Remediation of Contaminated Land (the RBRGs Practice Guide).

The following legislation, documents and guidelines may cover or have some bearing upon the assessment of contamination and the handling, treatment and disposal of contaminated materials for the Project:.

• Water Pollution Control Ordinance (WPCO) (Cap 358);

• Waste Disposal Ordinance (WDO) (Cap 354);

• Waste Disposal (Chemical Waste) (General) Regulation (Cap 354C); and

• Code of Practice on the Packaging, Labelling and Storage of Chemical Wastes.

2.2 SELECTION OF RBRG LAND USE SCENARIO

In accordance with section 2 of the RBRGs Practice Guide, the Site’s future land use and the appropriate set of RBRGs corresponding to the land use scenarios should be determined prior to the site appraisal.

As the proposed Project comprises engineering works for building of new CCGT units and the future land use of the Site will continue to be for the operation within the BPPS, the RBRGs conceptual site model under industrial land use scenario will be adopted.


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3 DESCRIPTION OF THE PROPOSED PROJECT

The proposed Project comprises four components, including the construction of up to two new CCGT units (hereafter referred as ‘CCGT No. 1’ and ‘CCGT No. 2’ respectively), cooling water intake facility, water treatment facility and water discharge facility. Annex A1 shows the proposed location of the new CCGT units and supporting facilities described below. With regard to the construction work of the Project, most of the proposed buildings and pipes will be supported on shallow pad footings or rafts founded directly on reclaimed land rock fill material.

3.1 CONSTRUCTION OF NEW CCGT UNITS

The new CCGT units mainly comprise a building of approximately 30m tall for the housing of turbines and generators (hereafter referred as ‘the Generation Building’). There are also supporting facilities planned, including transformers, exhaust stacks and facilities for fuel, power, service water, cooling water uptake and discharge, etc. The existing ground level of the Generation Building is +6.00 mPD (meters above Principle Datum), while the deepest excavation required is + 2.55 mPD (i.e. approximately 3.45m lower than the existing ground). According to the information provided by CAPCO, the approximate area to be occupied by the new CCGT units is 4,000 m2 (hereinafter referred as ‘the New Generation Area’).

3.2 CONSTRUCTION OF WATER INTAKE FACILITY

3.2.1 Water Intake Pump House and Pipeline for CCGT No. 1

The Water Intake Facility includes the construction of a cooling water pumping station, a foam monitor house and water pipelines connecting CCGT No. 1 with the pump house and further to the water intake (hereinafter referred as ‘the Water Intake Area’). The details of the construction within the Water Intake Area include:

• Construction of a cooling water pumping station which interconnects the water intake and CCGT No.1 by underground water pipelines. The pumping station shall house seawater pumps, penstocks, bar screens and band screens in a reinforced structure majority below ground level. An above ground steel structure for supporting the lifting facilities to remove equipment for maintenance shall also be constructed. The existing ground level is +5.50 mPD, while the deepest level of the pumping station is estimated to be – 6.60 mPD (i.e approximately 12.1m below the existing ground level [bgl]).

• Construction of underground water pipes which transfer cooling water from the sea to CCGT No.1. The existing ground level is +5.70 mPD and the proposed excavation depth for the housing of the pipeline is 0.00 mPD,


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with the deepest section up to -4.00 mPD. (i.e. approximately 9.7m below ground level (m bgl); and

• Relocation of an existing foam monitor house to the immediate west of the existing fuel oil storage tank.

3.2.2 Water Intake Pump House and Pipeline for CCGT No. 2

In view of the increase in demand of cooling water due to potential construction of CCGT No.2, CAPCO propose the construction of an additional Water Intake Facility associated with CCGT No. 2. The details of the construction within the Water Intake Area include:

• Construction of an additional water intake point adjacent to the BPPS seawall;

• Construction of an additional water pumping station with the deepest excavation up to 16mbgl; and

• Construction of underground water pipes by means of tunnelling method at an approximate level of 7.3m bgl. The water pipes will transfer cooling water from the sea to CCGT No.2. The water pipes will be constructed and advanced by means of tunnelling. Excavation of surface fill materials is not anticipated.

An indicative layout plan showing the Water Intake Pump House and Pipeline for both CCGT No. 1 and CCGT No. 2 is provided in Annex E of this CAP.

3.3 CONSTRUCTION OF WATER DISCHARGE FACILITY

3.3.1 Water Discharge Pipeline for CCGT No. 1

The Water Discharge Facility includes the construction of a Water Treatment Facility and the underground pipelines connecting CCGT No.1 with the pump house and further to the existing water outfall (hereinafter referred as ‘the Water Discharge Area’). The construction activities within the Water Discharge Area include:

• The Construction of a Water Treatment Facility along Sea Bank Road and the connection of pipelines which direct the used cooling water from the Generation Building to the discharge outlet of the BPPS. Majority of the portion of the discharge water pipeline is buried at the level of +1.0 mPD (i.e. 4.7m lower than the existing ground). The deepest excavation required is up to – 3.7 mPD (i.e. 9.4m lower than the existing ground). The new Water Treatment Plant Building is expected to be built on footings which a shallow excavation (0.8m below existing ground level) is expected.


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3.3.2 Water Discharge Pipeline for CCGT No. 2

In view of the water discharge capacity of the existing cooling water outfall, CAPCO propose to construct an additional seal pit and cooling water outfall immediate to the east of the existing cooling water outfall, which shall be connected to CCGT No. 2. The construction activities within the Water Discharge Area include:

• The Construction of a new outfall to the east of the existing cooling water outfall;

• The construction of a seal pit for treatment of cooling water before discharging to the sea (excavation up to 4.5m bgl); and

• The construction of water pipes which connect CCGT No.2 to the additional seal pit and cooling water outfall. The water pipes will be constructed and advanced by means of tunnelling with the deepest excavation at 7.2m bgl. Excavation of surface fill materials is not anticipated.

An indicative layout plan showing the Water Discharge Pipeline for both CCGT No. 1 and CCGT No. 2 is provided in Annex E of this CAP.

3.4 CONSTRUCTION OF ELECTROCHLORINATION FACILITY

The existing electrochlorination facility associated with cooling water treatment will be upgraded to meet the increased need of cooling water due to the construction of new CCGT units. Construction of additional electrochlorination facility is proposed to be built on footings with a shallow excavation of 0.8m below existing ground level (hereafter referred as ‘the Electrochlorination Area’). The existing vehicle access road and pedestrian adjacent to the existing electrochlorination facility will be realigned and extended to enclose the Electrochlorination Area.


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4 SITE APPRAISAL FINDINGS

The site appraisal comprises site walkover, review of historical aerial photographs and maps, review of historical spillage and leakage records, and review of previous SI conducted at the Site.

4.1 SURROUNDING LAND USE OF BPPS

The BPPS is located at Black Point of Tuen Mun. Surrounding land uses of the neighbouring environment are summarised as follow:

North: Immediate to the north is the mouth of Shenzhen Bay. Further north is Shenzhen.

East: Immediate to the east is a mountain. Further east is the Hong Kong Sludge Treatment Facility and the West New Territories Landfill.

South: Immediate to the south is part of a mountain. Further south includes a cluster of open materials/ container storage owned by multiple entities.

West: Immediate to the west is the shore of Urmston Road Navigation Channel.

A map showing the location of BPPS is presented in Annex A2.

4.2 SITE WALKOVER FINDINGS

A walkover of the Site was conducted on 20 July 2015. Site observations were summarised in Table 4.1 using the ‘Standard Form 3.1 – Current Use’ in accordance with the RBRGs Guidance Manual. Annex B presents the selected photographs of the Site.

4.3 REVIEW OF PAST LAND USES

A review of past land uses of the New Generation Area, Water Intake Area, Water Discharge Area and Electrochorination Area were conducted by reviewing the aerial photographs in the years of 1975, 1985, 1992, 1993, 1994, 1995, 1997, 2000, 2003, 2006, 2011, 2013 and 2015. The aerial photographs were obtained from the Surveys and Mapping Office of the Lands Department. Land use information of these areas was also provided by CAPCO. Key changes of site setting observed within these areas is summarised in Table 4.2 using the ‘Standard Form 3.2 – Past Use’ in accordance with the RBRGs Guidance Manual. The referenced aerial photographs are attached in Annex C.


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Table 4.1 Standard Form 3.1 Summary of On-Site Land Use – Current Use

Proposed Works Area

Type of Existing Facility/Business

On-site Property Land Use

Date Began/ Period

Description of Site Walkover Findings Owner or Occupier

Approximate Size of On-site Property (m2)

Off-site Property Affected?

New Generation Area

Open ground with a temporary covered material storage warehouse

Industrial 1993 - 2015

The site was paved with a layer of gravels on top of asphalt. The area is separated into two lots by a vehicle access road and both lots were used mainly for open material storage along with one temporary covered warehouse.

During the site appraisal, some materials are stored in the open area within the New Generation Area. A warehouse used for storage of inert materials such as cables and PVC pipes was also observed. No chemicals were observed being stored within the warehouse. Temporary contractor container offices were observed at the southern perimeter of the New Generation Area. No signs of chemical spills/ oil stains were observed within the New Generation Area. No potential land contaminating activities were observed being performed within the New Generation Area.

CAPCO ~40,000 No

Water Intake Area Vehicle access road and green area


Majority of the proposed Water Intake Area is vehicle access roads/ vacant area. The area in which the future pumping station for CCGT No.1 and foam monitoring house will be located is a green area immediately adjacent to an existing tank farms of BPPS. The Water Intake Area is outside the concrete retaining wall of the tank farms.

Proposed Water Intake Facility locations for CCGT No. 2 were used as vehicle access road (Cooling Water Pump Road East) and a vacant area to the west of a contractor village. A section of the water pipes to be connected to the CCGT No. 2 from the pumping station pass through an existing material storage / temporary contractor offices. No sign of chemical spills/ oil stains were observed within the Water Intake Area. No potential land contaminating activities were observed being performed within the Water Intake Area.

CAPCO ~1400 (pump houses only)

No


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Proposed Works Area

Type of Existing Facility/Business


Date Began/ Period

Description of Site Walkover Findings Owner or Occupier



Water Discharge Area

Vehicle access road and material storage


The proposed water discharge pipeline alignment connected to CCGT No.1 will run along vehicle access roads adjacent to an existing helicopter pads and by the bank of BPPS, which will connect to the existing water outfall of BPPS.

The location of the proposed new water treatment facility is occupied by a contractor as open material storage (e.g. metal scaffolds). It is next to the fresh water pump house and the existing water treatment plant. The area is generally paved with gravels and the contractor used wooden boards to pave part of the area on top of the gravel layer.

Water discharge pipeline connected to potential CCGT No.2 will run along vehicle access roads surrounding the existing gas turbines in BPPS. The water discharge pipeline will be connected to an additional seal pit and water outfall immediate to the west of the existing seal pit and water outfall.

CAPCO ~300 (water treatment facility and seal pit only)

No

Electrochlorination Area

Pedestrian path/ vehicle access road


The additional electrochlorination facility is an upgrade to an existing electrochlorination facility and will be located immediate adjacent to it. The area is currently part of a pedestrian path and vehicle access road. The new vehicle access road and pedestrian path will be realigned along the edge of the additional electrochlorination facility, which is occupied by contractor container offices and partly concrete paved at the time of site appraisal. No sign of chemical spills and oil stains/ oil stains were observed within the Water Intake Area. No potential land contaminating activities were observed being performed within the Electrochlorination Area.

CAPCO ~180 No


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Table 4.2 Standard Form 3.2 Summary of On-Site Land Use – Past Use

Proposed Works Area

Type of Facility/Business


Date Began/ Period

Description of Site History Owner or Occupier



New Generation Area

Open ground with a temporary covered material storage warehouse

Industrial 1993 Reclamation was completed. Construction of the BPPS appeared to have been in the early stages as the newly formed land is being zoned (observed from aerial photograph taken in 1993, reference no. CN5914).

CAPCO ~40,000 No

1994 The New Generation Area was an unpaved open ground and some areas of this area was used for construction material storage (observed from aerial photograph taken in 1994, reference no. CN6627).

1995 - 1997

No specific change of site configuration was observed between the aerial photos taken from 1995 (reference no. CN13146) and 1997 (reference no. CN17011), construction of BPPS was completed in 1996.

1997 - 2015

Minor changes to the site configuration were observed through 1997 – 2015, except the temporary covered warehouse. Materials/ temporary structures were stored/ erected within the New Generation Area. However, the land use of the New Generation Area has been consistently used as material storage.

Water Intake Area Vehicle Access Road

Non- Industrial 1993-2015

Since the operation of BPPS, the proposed water intake facility locations for CCGT No.1 and CCGT No.2 were not occupied by buildings. The area is kept clear and not used for any temporary storage.

CAPCO ~1400 (pump houses only)

No


Vehicle access road

Industrial 1993-2015

Since the operation of BPPS, the area in which the proposed water discharge facilities for CCGT No.1 and CCGT No.2 would be located was not occupied by buildings. The area is concrete paved and used as pedestrian/ vehicle access.

CAPCO ~300 (water treatment facility and seal pit only)

No


Pedestrian path Non- Industrial 1993-2015

Since the operation of BPPS, the area in which the proposed electrochlorination unit would be located has not been occupied by buildings. The area is concrete paved and is generally used for material storage.

CAPCO ~180 No


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4.4 REVIEW OF HISTORICAL SPILLAGE AND LEAKAGE RECORD

Enquiries were made to the EPD and the Fire Services Department (FSD) on chemical waste producer record and historical spillage and leakage records at BPPS, respectively.

A visit to the Chemical Waste Collection Licensing Section of the EPD Territorial Control Office was arranged on 28 July 2015. Information related to chemical waste producers registered in BPPS was extracted and summarised in Table 4.3. As of the latest available record (up to 30 June 2015), a total of 12 chemical waste producers were registered in BPPS, of which only nine of them remained valid. Upon confirmation with CAPCO, all chemical waste producers and their corresponding chemical waste producing activities were not located within the Site, except part of the New Generation Area which was used by a contractor (Leighton Contractors (Asia) Ltd) as office/ material storage. A valid chemical waste producer record was registered under the abovementioned contractor as of 30 June 2015. At the time of the site walkover, the contractor did not have any operation undertaken within the New Generation Area.

Table 4.3 List of Chemical Waste Producer Registered in BPPS as of 30 June 2015

No. Company Name (English) Business Nature Status

1. Black Point Power Station Generation Valid

2 DCN Diving Asia Limited Construction Services Valid

3. Thorn Security (Hong Kong) Limited

Construction Services Valid

4. Leighton Contractors (Asia) Ltd.

Construction Valid

5. Hong Kong Fuji Technology Co. Ltd.

Contractors Company Valid

6. Getz Bros & Co. (HK) Ltd. GBG Mgmt Building of BPPS Valid

7. CAPE Hong Kong Fuji Company Ltd.

Maintenance Valid

8. Hong Kong Fuji Technology Company

Engineering Valid

9. Wai Kee (Zens) Construction & Transportation Co, Ltd.

Construction Valid

10. Ready Mixed Concrete (HK) Ltd.

Concrete Manufacturing Invalid

11. Nowsco UK Ltd. C/O Raymons Supply Co. Ltd.

Pipeline/ Well Services Invalid

12. Paul Y C&E Company Ltd. Construction Services Invalid

An information request was sent to the FSD regarding the records of any historical chemical spillages, fire incidents and Dangerous Goods (DG) storage


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within the BPPS. The request was made in the form of facsimile and was attached in Annex D together with the response from FSD. A total of 42 DG storage records were identified within the whole of the BPPS. As confirmed by CAPCO, none of the 42 DG storages were located within the Site. Part of the New Generation Area was used as the temporary site office by the contractors of the Black Point Gas Supply Project (around 2010 – 2013). The contractor office location was paved with concrete. Small quantities of chemicals (<35L) (e.g. paint, lube oil and solvent in metal cans) were stored in enclosed metal cabinet within the contractor office. Other than that, chemical storage was only confined to DG storages which were not located within the Site. A request of information was sent to EPD’s Regional Office (West) on 25 September 2015 to obtain any records of leakage/ spillage incident. A reply from EPD was received on 23 October 2015 and no events of spillage/ leakage of chemicals were recorded at the Site. Correspondences of the information request and reply from EPD are attached in Annex D. No incident records of fire within the proposed CCGT Project site were reported. For BPPS, one alarm sounding incident (spark reported at one of the transformer) was recorded on 15 May 2014. There was a minor hydraulic oil leakage from a mobile crane on 12 April 2012. The location of the leakage was along the transformer road to the south of the New Generation Area. The oil leaked onto the concrete road was cleaned up immediately with no release to the environment. The case was reported as an environmental near-miss. The indicative location of the leakage incident is shown in Annex E.

4.5 PAST SI RECORD, (HYDRO) GEOLOGY AND UNDERGROUND SOIL PROFILE

4.5.1 Environmental Site Investigation Conducted by CAPCO in 2012

Previous environmental site investigation (SI) for a land contamination assessment was conducted by CAPCO within BPPS in 2012 (hereafter referred as ‘the 2012 SI’). Soil and groundwater samples were collected for analysis. A plan showing the sampling locations is attached as Annex E. As compared to the area of the Site, a total of seven borehole locations were within/ adjacent to the boundary of the Site, which include BPBH1, BPBH4, BPBH5, BPBH6, BPBH7, BPBH8 and BPBH9. The above borehole locations covered the New Generation Area (including the location occupied by the contractor mentioned in Section 4.4), Water Intake Area and Water Discharge Area.

The SI was conducted in accordance with the RBRGs Practice Guide. The seven sampling locations were conducted by means of borehole drilling. Soil and groundwater samples were collected and tested against Heavy Metals, Petroleum Carbon Ranges (PCR), Volatile Organic Compounds (VOCs), Semi-Volatile Organic Compounds (SVOCs) and PCBs. The general site geology/ hydrogeology recorded from the borehole logs showed that the Site has approximately 2m of coarse sand fill materials, followed by gravels and rock fragments. The approximate level of groundwater is at 4m bgl. No level of monitored parameters reportedly exceeded corresponding RBRGs for industrial landuse.


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Table 4.5 Summary of Relevant Land Contamination Assessment Results from 2012

Sampling Locations

As-built Coordinate of the Sampling Locations

Drilling Depth (m bgl)

Soil Samples Collected

(m bgl)

No. of Groundwater Samples Collected

Testing Parameters Exceeding RBRGs (Yes/No)

Heavy Metals (b) PCR© VOCs(d) SVOCs(e) PCBs

Sampling Locations within the New Generation Area

BPBH4 E 808727.51 N 830246.14 7.55 2 1 No BDL BDL BDL BDL

BPBH6 E 808595.27 N 830303.71 2.40 3 (a) 0 No BDL BDL BDL BDL


Sampling Locations at the Water Intake Area



Sampling Locations adjacent to Water Discharge Area


BPBH9 E 808895.04 N 830699.89 5.00 3 1 No BDL BDL BDL BDL Notes: (a) Soil duplicate sample was collected at 1.5m bgl. (b) Heavy Metals: Antimony, Arsenic, Barium, Cadmium, Cobalt, Copper, Lead, Maganese, Molybdenum, Nickel, Tin, Zinc, Mercury, Chromium (III) and Chromium (VI). (c) PCR: C6 – C8, C9 – C16 and C17 – C35

(d) VOCs: For soil: Acetone, Benzene, Bromodichloromethane, 2-Butanone, Chloroform, Ethylbenzene, Methyl tert-Butyl Ether, Methylene Chloride, Styrene, Tetrachloroethene, Toluene, Trichloroethene and Xylenes (Total)

(e) SVOCs: For soil: Acenaphthylene, Acenaphthene, Anthracene, Benzo(a)anthracene, Benzo(a)pyrene, Benzo(b)fluoranthene, Benzo(k)fluoranthene, Benzo(g,h,i)perylene, Bis-(2- ethylhexyl)phthalate, Chrysene, Dibenz(a,h)anthracene, Fluoranthene, Fluorene, Hexachlorobenzene, Indeno(1,2,3cd)pyrene, Naphthalene, Phenanthrene, Phenol and Pyrene. For groundwater: Acenaphthylene, Acenaphthene, Anthracene, Benzo(b)fluoranthene, Chrysene, Fluoranthene, Fluorene, Hexachlorobenzene, Naphthalene, Phenanthrene and Pyrene.

BDL – Below Laboratory Detection Limit.


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In general three soil samples can be collected from each sampling location at 0.5m and 1.5m and 3.0m bgl. The soil strata below 3.0m are mainly gravels and rock fragments. Based on the site formation of BPPS, part of the area is flattened and cleared from existing hill while the remaining is by reclamation. Such formation arrangement gives rise to an underground geology abundant with rock fragments and boulders. Therefore, rock fragments were used as reclamation material with a thin surface fill soil layer on top. Corresponding borehole logs are summarised in Annex F.

The laboratory analysis results indicate that no exceedances of the RBRGs industrial land use for heavy metals, PCR, VOCs, SVOCs and PCBs for all the soil and groundwater samples tested. All the parameters (including heavy metals, PCR (C6 – C8, C9 – C16 and C17 – C35), VOCs, SVOCs and PCBs analysed were below the relevant detection limits. Quality control samples (field blanks, equipment blanks and trip blanks) were taken and no evidence of cross contamination was found.

The site investigation and soil/ groundwater sampling were conducted in accordance with the RBRGs Practice Guide and there was no change in landuse for the Site after the SI conducted in 2012. It is considered that the SI data collected in 2012 provided an up-to-date information of the ground condition of the Site and therefore the results will be used as part of the land contamination assessment of this Project.


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5 SITE INVESTIGATION PLAN

5.1 PROPOSED SAMPLING LOCATIONS AND TESTING PARAMETERS

Section 4.1 – 4.4 summarized the findings from site walkover and review of historical aerial photographs, from which potential soil and groundwater contamination concerns in the New Generation Area, Water Intake Area, Water Discharge Area, and Electrochlorination Area were identified by a risk-based approach. Section 4.5 presents the results and locations of previous SI conducted within/ adjacent to the Site.

Based on the observation from the site walkover and the review of historical aerial photographs, there was no high risk potential land contamination activity being carried out within the above-mentioned Areas. The general land use of the Site include: material storage, temporary contractor offices, vehicle access roads and vacant area. Part of the New Generation Area, Water Intake Pump House and Pipeline 1 and 2 and Electrochlorination Area were used as material storage and temporary contractor offices. The Water Discharge Area was used as vehicle access roads (as mentioned in Table 4.1 and 4.2). As confirmed by CAPCO, chemicals were mainly stored in DG storages which were not located within the Site. No potential land contaminating activities were historically conducted within the abovementioned Areas. As a conservative approach to confirm the land condition of the Site, sampling locations are proposed within the Site as illustrated in Section 5.1.1 to 5.1.5 below .

5.1.1 New Generation Area

For the New Generation Area, a total of seven boreholes were proposed to be conducted to account for the ground condition of the Area, namely BH2 - BH8. The New Generation Area was mainly left vacant with part of it being used for open material storage. A material storage warehouse was also located within the area. As confirmed by CAPCO, only inert construction materials (e.g. wood, metal parts and electric cables) were stored within the New Generation Area. To address the ground condition at the location being used as material storage and warehouse, sampling location BH2 – BH6 were proposed.

Sampling location BH7 was positioned at the former contractor office of Black Point Gas Supply Project (2010 – 2013). The contractor office was located at the southwest corner of the New Generation Area. Since small quantities of chemicals were stored within enclosed metal cabinet in the contractor office, BH7 proposed shall address any potential impact on soil/ groundwater due to activities performed during 2010 - 2013.

Sampling location BH8 was positioned in adjacent to the location of the leakage incident mentioned in Section 4.4. The leakage incident was located


16

outside the southern perimeter of the New Generation Area and BH8 shall address any adverse impact on soil/ groundwater due to the leakage incident.

In addition to the boreholes proposed in this CAP, three boreholes from the 2012 SI (BPBH4, BPBH6 and BPBH7) were also located within the New Generation Area. Since the 2012 SI, there was no change of operation and no potential land contaminating activities were undertaken within the New Generation Area. Therefore, the results obtained from the boreholes conducted in 2012 SI are considered to be valid and shall form part of the SI plan for this land contamination assessment.

5.1.2 Water Intake Area

Majority of the Water Intake Area, including one of the pumping stations and the water intake pipelines will be located at a vacant areas and existing vehicle access roads. A section of the water intake pipeline alignment will pass through an existing material storage/ temporary contractor offices. As confirmed by CAPCO, only inert materials (e.g. wood and metal parts) were stored within the material storage and temporary contractor offices and no potential land contaminating activities were historically conducted at this location. One sampling location (BPBH1) was conducted at the material storage during the 2012 SI and no change of operation was conducted since then. Therefore, the results obtained from sampling locations BPBH1 is considered valid in this assessment. In addition, to address the ground condition at the temporary contractor offices, sampling location BH1 was also proposed in this CAP.

The remaining pumping station was located at a vacant grass lawn adjacent to an existing tank farm. During the 2012 SI, sampling location BPBH5 was conducted at this location and no change of operation was conducted since then. The grass lawn was separated from the tank farm by concrete retaining walls. In addition, the tank farm was also concrete paved. CAPCO has implemented strict monitoring of the tank farm (e.g. daily inspection and patrol by CAPCO officers) to confirm no leakage of content from the tanks. No leakage incident was recorded by CAPCO after the 2012 SI and none were recorded by EPD. Considering the above, there is low risk of leakage from the existing tank farm. However, as a conservative approach, one sampling location (BH9) was proposed to confirm the land condition of the proposed Water Intake Area adjacent to the tank farm. .

5.1.3 Water Discharge Area

For the Water Discharge Pipeline 1 and 2, majority of the pipeline will be located along vehicle access roads (the Sea Bank Road and Chimney Road). A new wastewater treatment facility and a seal pit are also proposed to be constructed. Two boreholes with end depth of 3.0 m bgl are proposed in this SI (BH9 and BH10) to address the mentioned project components along Sea Bank Road. Since only shallow excavation is anticipated at the Water Discharge Area, and as both locations are located near the existing water


17

outfall as well as power generation facilities, in case there are any site constraints (e.g. presence of underground utilities/ headroom concern) which render borehole construction not feasible/ unsafe, trial pit method shall be adopted at BH10 and BH11 with an end depth of 3.0 m bgl.

Further to the locations proposed in this CAP, two sampling locations (BPBH8 and BPBH9) were conducted during the 2012 SI and they were located adjacent to the water discharge alignment along Chimney Road and Sea Bank Road.

5.1.4 Electrochlorination Area

The Electrochlorination Area will be located at vehicle access road/ temporary contractor offices. This area was previously used for temporary material storage. As confirmed by CAPCO, only inert construction materials (e.g. wood and metal parts) were stored in this area. One sampling location (BH1) located at the previous temporary material storage is proposed to account for the ground condition of the area.

5.1.5 Proposed Locations for SI

Considering the information presented in Section 4.5, a SI plan for the Project is presented in this section and Table 5.1 summarises the number of sampling locations conducted and proposed within the Site.

Table 5.1 Proposed Site Investigation Locations

Works Area Sampling Locations Conducted in 2012

Proposed Sampling Locations to be Conducted

Borehole Borehole

New Generation Area 3 7

Water Intake Area 2 1(b)

Water Discharge Area 2(a) 2(b)

Electrochlorination Area 0 1

Total 7 11 Notes: (a). Soil and Groundwater sampling were conducted at the periphery of Water Discharge

Area.

(b). Some proposed boreholes are positioned to serve more than one Works Area, which include: BH1 for Water Intake Area and Electrochlorination Area; BH2 for Water Intake Area and New Generation Area. The number of boreholes is reflected in Water Intake Area and Electrochlorination Area to avoid double counting.

Table 5.2 presents the number of sampling locations, their sampling methods, the number of samples, and the parameters that will be analysed. Sampling locations were determined based on a risk based approach. The locations of the proposed sampling locations are included in Annex E. Soil sampling depths were determined based on the anticipated full depth of contamination and previous ground investigation records at those particular works areas.


18

Table 5.3 presents the laboratory analytical methods and reporting limits proposed for the SI. Sampling parameters for both soil and groundwater are proposed with reference to chemicals which may be encountered due to potential contaminative activities at power plant as stipulated in EPD’s Guidance Note.

Table 5.2 Proposed Sampling and Analysis Plan

Sampling Location ID

Proposed Coordinates (a)

Soil Sampling Groundwater Proposed Testing Parameters

Depths (m bgl)

Sampling Depths (m bgl)

BH1 E 808418.73 N 830093.53

Manual excavation of inspection Pit (0-1.5 m bgl): - To collect disturbed

samples at 0.5 m and 1.5 m bgl.

Rotary Drilling of boreholes (1.5-7.0 m bgl): - Continuous drilling

and retrieving of soil materials for visual inspection at every 1m from the bottom of inspection pit to a maximum of 7 m below ground level or 2m below static groundwater level, whatever shallower.

- To collect undisturbed soil samples at 3.0 m and 6.0m bgl.

At each borehole, to collect one groundwater sample at static groundwater level (Groundwater level was detected at approximately 4m bgl during previous sampling conducted in 2012).

Heavy Metals (b), PCR(c), VOCs(d), SVOCs(e), PCBs

BH2 E 808541.94 N 830228.43

BH3 E 808600.64 N 830211.71

BH4 E 808635.52 N 830269.98

BH5 E 808652.27 N 830183.24

BH6 E 808689.67 N 830221.97

BH7 E 808698.56 N 830126.61

BH8 E 808762.79 N 830194.40

BH9 E 808490.39 N 830265.07

BH10 E 808783.24 N 830626.67

Manual excavation of inspection Pit (0-1.5 m bgl):

If groundwater is encountered during drilling,


19

Sampling Location ID

Proposed Coordinates (a)

Soil Sampling Groundwater Proposed Testing Parameters

Depths (m bgl)

Sampling Depths (m bgl)

BH11 E 808932.10 N 830742.77

- To collect disturbed samples at 0.5 m and 1.5 m bgl.

Rotary Drilling of boreholes - Continuous drilling

and retrieving of soil materials for visual inspection at every 1m from the bottom of inspection pit to a maximum of 3 m below ground level.

- To collect undisturbed soil samples at 3.0 m bgl.

groundwater well shall be installed and groundwater sample shall be collected.

Notes: (a) By experience, the exact sampling locations will be subject to fine adjustment due to site-

specific conditions/ constraints (e.g. presence of underground utilities, foundations, insufficient headroom, spaces occupied by vehicles, etc) during the actual SI.

(b) Heavy Metals: For soil: Antimony, Arsenic, Barium, Cadmium, Cobalt, Copper, Lead, Maganese, Molybdenum, Nickel, Tin, Zinc, Mercury, Chromium (III) and Chromium (VI); For groudwater: Mercury

(c) PCR: C6 – C8, C9 – C16 and C17 – C35 (d) VOCs: For soil: Acetone, Benzene, Bromodichloromethane, 2-Butanone, Chloroform,

Ethylbenzene, Methyl tert-Butyl Ether, Methylene Chloride, Styrene, Tetrachloroethene, Toluene, Trichloroethene and Xylenes (Total)

(e) SVOCs: For soil: Acenaphthylene, Acenaphthene, Anthracene, Benzo(a)anthracene, Benzo(a)pyrene, Benzo(b)fluoranthene, Benzo(k)fluoranthene, Benzo(g,h,i)perylene, Bis-(2- ethylhexyl)phthalate, Chrysene, Dibenz(a,h)anthracene, Fluoranthene, Fluorene, Hexachlorobenzene, Indeno(1,2,3cd)pyrene, Naphthalene, Phenanthrene, Phenol and Pyrene.

For groundwater: Acenaphthylene, Acenaphthene, Anthracene, Benzo(b)fluoranthene, Chrysene, Fluoranthene, Fluorene, Hexachlorobenzene, Naphthalene, Phenanthrene and Pyrene

(f) m bgl = meter below ground level.

Table 5.3 Laboratory Testing Methods and Reporting Limits

Test Parameter Soil Groundwater Reference Method

Detection Limit (mg/kg)

Reference Method

Detection Limit (µg/L)

Metals (b) Lead USEPA 6020 1 USEPA 6020 Not to be tested(a) Antimony USEPA 6020 1 USEPA 6020 Not to be tested(a) Arsenic USEPA 6020 1 USEPA 6020 Not to be tested(a) Barium USEPA 6020 1 USEPA 6020 Not to be tested(a)


20



Reference Method


Cadmium USEPA 6020 0.2 USEPA 6020 Not to be tested(a) Cobalt USEPA 6020 1 USEPA 6020 Not to be tested(a) Copper USEPA 6020 1 USEPA 6020 Not to be tested(a) Manganese USEPA 6020 1 USEPA 6020 Not to be tested(a) Molybdenum USEPA 6020 1 USEPA 6020 Not to be tested(a) Nickel USEPA 6020 1 USEPA 6020 Not to be tested(a) Tin USEPA 6020 1 USEPA 6020 Not to be tested(a) Zinc USEPA 6020 1 USEPA 6020 Not to be tested(a) Chromium III By Calculation 1 By Calculation Not to be tested(a) Chromium VI USEPA3060 1 APHA3500 Cr:D Not to be tested(a) Mercury APHA3112B 0.05 APHA3112B 0.5 Petroleum Carbon Ranges (b) C6-C8 USEPA 8015 5 USEPA 8015 20 C9-C16 USEPA 8015 200 USEPA 8015 500 C17-C35 USEPA 8015 500 USEPA 8015 500 VOCs (b) Benzene USEPA 8260 0.2 USEPA 8260 5 Toluene USEPA 8260 0.5 USEPA 8260 5 Ethylbenzene USEPA 8260 0.5 USEPA 8260 5 Stryene USEPA 8260 0.5 USEPA 8260 5 Xylenes (Total) USEPA 8260 2 USEPA 8260 20 Acetone USEPA 8260 50 USEPA 8260 500 2-Butanone USEPA 8260 5 USEPA 8260 50 Methylene chloride USEPA 8260 0.5 USEPA 8260 50 Trichloroethene USEPA 8260 0.1 USEPA 8260 5 Tetrachloroethene USEPA 8260 0.04 USEPA 8260 5 Chloroform USEPA 8260 0.04 USEPA 8260 5 Bromodichloromethane USEPA 8260 0.1 USEPA 8260 5 Methyl tert-Butyl Ether USEPA 8260 0.5 USEPA 8260 5 SVOCs (b) Acenaphthene USEPA 8270 0.5 USEPA 8270 2 Acenaphthylene USEPA 8270 0.5 USEPA 8270 2 Anthracene USEPA 8270 0.5 USEPA 8270 2 Benzo(a)anthracene USEPA 8270 0.5 USEPA 8270 Not to be tested (a) Benzo(a)pyrene USEPA 8270 0.05 USEPA 8270 Not to be tested(a) Benzo(b)fluoranthene USEPA 8270 0.5 USEPA 8270 1 Benzo(k)fluoranthene USEPA 8270 0.5 USEPA 8270 Not to be tested (a) Benzo(g,h,i)perylene USEPA 8270 0.5 USEPA 8270 Not to be tested (a) Bis-(2-Ethylhexyl)phthalate USEPA 8270 5 USEPA 8270 Not to be tested (a) Chrysene USEPA 8270 0.5 USEPA 8270 1 Dibenzo(a,h)anthracene USEPA 8270 0.05 USEPA 8270 Not to be tested (a) Fluoranthene USEPA 8270 0.5 USEPA 8270 2 Fluorene USEPA 8270 0.5 USEPA 8270 2 Hexachlorobenzene USEPA 8270 0.2 USEPA 8270 4 Indeno(1,2,3-cd)pyrene USEPA 8270 0.5 USEPA 8270 Not to be tested (a) Napththalene USEPA 8270 0.5 USEPA 8270 2 Phenanthrene USEPA 8270 0.5 USEPA 8270 2 Pyrene USEPA 8270 0.5 USEPA 8270 2


21



Reference Method


Phenol USEPA 8270 0.5 USEPA 8270 Not to be tested (a) PCBs PCBs USEPA 8270 0.1 USEPA 8270 1 Notes: (a). Not to be tested – No corresponding RBRGs was established for groundwater. (b). All analysis shall be conducted according to the reference test methods accredited by HOKLAS

or one of its Mutual Recognition Arrangement partners, along with laboratory internal Quality Assurance/Quality Control (QA/QC) procedures.

5.2 POTENTIAL SITE CONSTRAINTS AND MODIFICATION AT PROPOSED SAMPLING LOCATIONS

5.2.1 Geological Strata

According to the SI record from 2012, it is shown that the geological strata encountered within BPPS is generally a shallow fill layer (approximately 2m thick from ground) followed by gravels/ boulders fill. As a result, no soil samples could be collected below 3.0m bgl.

Considering that similar geological strata would be encountered at the proposed sampling locations, it is therefore anticipated that limited deep soil sample will be collected.

5.2.2 Underground Utility

Underground utility scanning and mapping at the sampling locations conducted in 2012 was conducted by Gammon Construction Limited. Other than the New Generation Area, intensive underground utility network was detected at areas around buildings within BPPS. Utility scanning will be carried out in order to determine the actual SI location. Any major deviation from this CAP due to underground utility encountered during the site investigation will be reported in the CAR.


22

6 SAMPLING METHODOLOGY

6.1 OVERVIEW

Borehole drilling has been proposed as the means of sampling to investigate and determine the presence of potential soil and groundwater contamination. The drilling works will be supervised by a CAPCO engineer and soil and groundwater sampling will be supervised by a land contamination specialist of ERM. The soil sampling methodologies are based on methods developed by the US EPA, and adapted to Asian standards of operation and practices, as appropriate. These methods include decontamination procedures, sample collection, preparation and preservation, and chain-of-custody documentation as described in the following sections.

6.2 BOREHOLE DRILLING

The borehole will be advanced by means of dry rotary drilling method, i.e. without the use of a flushing medium, as far as practicable. Water can only be used as a flushing medium to facilitate the drilling if rocks/ large boulders are encountered during the drilling.

For safety reasons and to inspect for underground utilities, utility scanning will be performed at all proposed borehole locations to ensure clearance of underground structures prior to ground disturbance. In addition, an inspection pit will be excavated down to about 1.5m bgl to manually perform underground utility clearance at each of the borehole locations before drilling commences.

Disturbed soil samples will be collected at the depth of 0.5 m and 1.5 m bgl from the excavation pits. Soil boring using rotary drill rigs will then be performed from 1.5 m bgl to a maximum depth of 7.0 m bgl.

Soil samples will be retrieved at approximately 1.0 m intervals for inspection of geological characters and for visual inspection for potential contamination (such as visual evidence of discolouration, staining, presence of non-aqueous liquid phase and abnormal odour). The soil profile with evidence of contamination (if any) will be recorded in the drilling log. The log will also include the general stratigraphic description, depth of sampling, sample notation, and level of groundwater (where encountered).

Undistributed soil samples will be collected at depths of 3.0 m and 6.0 m bgl using the U76 core. Where there are suspected signs of contamination, extra samples will be taken for laboratory analysis.


23

6.3 TRIAL PIT EXCAVATION

If borehole method cannot be adopted at BH10 and BH11 due to presence of site constraints as mentioned in Section 5.1.3, trial pits shall be adopted as an alternative sampling methodology. The trial pit area will be approximately 1.5m by 1.5m. The excavation will proceed by hand digging in a series of shallow cuts, typically between 0.2 and 0.3m thickness. This will allow visual examination of the ground conditions, logging of the soil strata and the collection of soil samples.

For safety reasons, available utility service plans will be checked and the surrounding area for visible covers/service runs. Utility scanning will be performed at all proposed trial pit locations to ensure clearance of underground structures prior to ground disturbance.

Disturbed soil samples will be collected at the depth of 0.5m, 1.5m and 3.0 m bgl from the trial pits. Where there are suspected signs of contamination, extra samples will be taken for laboratory analysis.

The excavated materials will be positioned away from the immediate edge of the trial pit to avoid collapse. Upon completion, trial pits will be backfilled immediately in reverse order to which they were excavated.

6.4 SOIL SAMPLING

The sampling programme will be undertaken with strict adherence to appropriate protocols to minimise the potential for cross-contamination between sampling locations. The following will be implemented while sampling:

• A ceramic spoon shall be used to collect disturbed soil sampling, which will be cleaned between sampling;

• Where possible, a new set of sampling equipment will be used for each sampling event. If this is not possible then the equipment will be cleaned with a non-phosphate detergent between each sampling event. Larger equipment such as drilling rigs, drill rods, casings, will be steam cleaned where possible, or at a minimum pressure jet washed with water from the mains.

• The ceramic sampling spoon, sampling cores and other sampling equipment that come into direct contact with the samples will be decontaminated first with fresh water and Decon 90 detergent; rinsed with distilled water and air dried prior to the sampling and between samples;

• Clean latex gloves will be worn during sample collection and changed before each sample is collected to prevent cross contamination;


24

• The presence of volatile organic compounds (VOCs) from the samples shall be screened by using a Photo-ionisation Detection (PID) meter. Where PID readings over 20 ppm are recorded or where significant visual or olfactory evidence of contamination is present, further laboratory analysis may be necessary; and

• The thickness of any free product and groundwater if present at locations shall be measured with an interface probe.

6.5 GROUNDWATER SAMPLING

Groundwater samples will be collected if groundwater is encountered in the boreholes. Groundwater monitoring wells shall be installed in accordance with the instructions given by the land contamination specialist. Annex G presents a schematic drawing of groundwater monitoring well for reference.

After the installation of the monitoring wells, the depth of water table at all monitoring wells will be measured in order to delineate the local groundwater table contours at the subject site. Well developments (approximately five well volumes) will be carried out to remove silt and drilling fluid residing from the wells. The wells will then be allowed to stand for a day to permit groundwater conditions to stabilise.

Groundwater levels and thickness of any free product layer, if present, will be measured at each well before groundwater samples are taken. One groundwater sample will be collected from each well, using a disposable Teflon bailer.

6.6 SAMPLE SIZE

Prior to sampling, the laboratory responsible for chemical analysis will be consulted on the particular sample size and preservation procedures that are necessary for each chemical analysis. Table 6.1 lists the recommended sample container types, sizes and preservation method.

Table 6.1 Summary of Sample Container Type, Sizes and Preservation Method

Test Parameters Container Type, Size and Preservation Method

Soil

Heavy Metals 1 x 250ml glass jar with teflon-lined cap

VOCs / PCR 1 x 250ml glass jar with teflon-lined cap

SVOCs 1 x 250ml glass jar with teflon-lined cap

PCBs 1 x 250ml glass jar with teflon-lined cap

Groundwater

Metals (Mercury) 1 x 250ml plastic (no preserve)

VOCs / PCR 2 x 40ml amber glass vials (hydrochloric acid)

PCR / SVOCs / PCBs 1 x 1,000ml amber glass (no preserve)


25

6.7 SAMPLE HANDLING AND LABORATORY ANALYSIS

All samples will be directly collected in pre-cleaned sample bottles provided by the laboratory. Chain-of-custody documentation will be initiated immediately after samples are collected. Containers will be labelled in the field with the date, well designation, project name, time of collection and analysis to be performed. If the field work is expected to take several days, soil samples will be kept chilled with ice (at approximately 4°C) on-site and during transport. Samples will be delivered to a Hong Kong Laboratory Accreditation Scheme (HOKLAS) accredited laboratory or an equivalent laboratory approved by the Engineer, for chemical analyses. All analysis will be conducted according to the test methods accredited by HOKLAS or one of its Mutual Recognition Arrangement partners, along with laboratory internal Quality Assurance/Quality Control (QA/QC) procedures.

6.8 QUALITY ASSURANCE /QUALITY CONTROL SAMPLES

QA/QC samples will be collected to allow an assessment of the quality of data collected. The QA/QC samples are listed below.

• One field soil duplicate sample/one groundwater duplicate sample per 20 soil and groundwater samples will be collected for full suite analysis;

• One field blank per proposed Works Area (i.e. four) will be collected for full suite analysis. The field blank will consist of laboratory supplied de-ionized water stored in the cooler boxes during sample shipment;

• One equipment blank per each set of drilling tools and rig will be collected and analysed for heavy metals to account for any potential cross-contamination due to drilling equipment. De-ionized water is poured onto decontaminated sampling equipment, and collected in appropriate sampling containers; and

• One trip blank per trip will be analysed for VOCs to account for any potential cross-contamination.

6.9 HEALTH AND SAFETY

A site health and safety plan will be prepared before any site work is performed at the Site. The health and safety plan will include:

• Instruction of works on work procedures, safe practices, emergency duties, and applicable regulations;

• Regularly scheduled meetings of the workers in which the possible hazards, problems of the job, and related safe practices are emphasised and discussed;

• Good housekeeping practices; and


26

• Availability of and instruction in the location, use and maintenance of personal protective equipment.

The specific safety measures to be implemented during the site work will depend on the nature and content of contamination, the site conditions and the regulations related to site safety requirements. In general, the site work will be performed with the following safety measures:

• Maintain proper safety devices, barriers to minimise hazards during the SI;

• Prohibit smoking and open flames;

• Develop and maintain a written emergency plan applicable to the land contamination SI;

• Maintain equipment in good operating condition and have emergency and first aid equipment ready for immediate use, where applicable;

• Conduct equipment tests to ensure that equipment is properly placed and in good operating condition, and that workers are able to respond to emergency situations;

• Require all workers employed or retained by the Contractor, or a subcontractor, to at all times wear clothing suitable for the works, weather and environmental conditions; and

• The personnel are required to wear respirator and gloves for vapour exposure protection, if necessary. Safety helmet and protective boots should be worn.


27

7 CONCLUSIONS

In accordance with Clause 3.4.8 and Appendix D2 Requirements for Assessment of Land Contamination of the Study Brief, land contamination assessment shall be carried out for the Project. The Site is divided into four proposed work areas, namely the New Generation Area, Water Intake Area, Water Discharge Area and Electrochlorintion Area, in accordance with their future functionality. A site walkover was conducted on 20 July 2015 to identify any potential land contamination issues within the above mentioned work areas. Review of historical landuse by aerial photographs and from information provided CAPCO was also conducted to identify potential land contamination issues due to historical landuses.

A SI was conducted within BPPS by CAPCO in 2012. A total of seven sampling locations were identified to be located within/ adjacent to the Site. Review of laboratory analytical data collected in 2012 show no exceedance of RBRGs for industrial landuse. As confirmed by CAPCO, there was no change in land use and no historical potential land contaminating activities were conducted within the abovementioned areas. Considering the SI results obtained in 2012 and the site appraisal findings, a total of eleven (11) sampling locations are proposed based on a conservative approach. A sampling and testing plan and the sampling method at these locations are proposed in this CAP.

7.1 RECOMMENDATIONS

The SI is tentatively scheduled in October 2015. Upon receiving all laboratory analytical results, a Contamination Assessment Report (CAR) shall be prepared to report the details of the SI to be conducted with reference to this CAP and summarise the laboratory analytical results obtained. The analytical results will be compared against the RBRGs which are presented in Annex H. If land contamination is identified, a Remediation Action Plan (RAP) will be submitted alongside with the CAR for EPD’s endorsement. The tentative submission time of the CAR/RAP is December 2015.

Annex A

Site Location and Land-based Project Plan

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4

GAS RECEIVING STATION ROAD (5M WIDE)

2222 2 2 2 2

28

C.W. INTAKE

CAR PARK

CAR PARK

CAR PARK

61

66

5945

17

1016

181819

43

15

11

12

10

61

5

35

4

3

1

102929292929 29 29 6767

30

3232323232

36

37

1

29

10

323333

31

41

41A

40

42 10

444444

26

25

26

OIL TANK ROAD

TRACK

STATION EN

TRANCE RO

AD W

EST

C.W. OUTFALL

SEAL PIT ROAD

HRSG ROAD 7

DANGEROUS GOODS PLANT ROAD

NULLAH

NULLAH

PFA TRACK

EASTERN ROAD

WATER TREATMENT PLANT ROAD

SEA BANK ROAD

CHIMNEY ROAD

OUT SIDE FACE OF EXISTING SEAWALL

TRANSFORMER ROAD

NULLAH

+10.00m.P.D.

+5.73m.P.D.+5.73m.P.D.

+5.89m.P.D.

+5.73m.P.D.

+10.00m.P.D.

CAR PARK

NULLAH

ENTRANCE ROAD

CENTRAL ROAD EAST

CENTRAL ROAD

ELECTROCHLORINATION PLANTHOUSE ROAD

NULLAH


+5.73m.P.D.

NULLA

H


GAS RECEIVING STATION

57

56

7.3m

5.8m

4.8m

CAR PARK

27

27

(FOR 50 PC)

(FOR 9LV, 7HV)

(FOR 53 PC)

(FOR 23 PC)

(FOR 24 PC)

CAR PARK (FOR 4 PC)

CAR PARK (FOR 8 PC)

(FOR 4 PC)CARPARK

+5.73m.P.D.

6m

6m

6m

6m

9.5m

15.4m

6m

5m

5m

7m

6m 6m 6m 6m 6m 6m 6m 6m

6m

6m

4m 4m 4m 4m

NATURALSLOPE

NATURALSLOPE

3m

5m

10m

17.5m

12m

5m

6m

5m

5m

6.5m

5m

5m

6m

NATURALSLOPE

G5

G1G2 G3

G4

BLDG. HIGHEST LVL.+22.00mPD

BLDG.HIGHESTLVL.

+13.60mPD

+29.50mPDSTRUCTURE HIGHEST LVL.

BLDG.HIGHESTLVL.

+13.60mPD


+19.80mPDBLDG. HIGHEST LVL.

BLDG. HIGHEST LVL.

+10.82mPD

BLDG.HIGHESTLVL.

+12.35mPD

+106.00mPD

LVL.

HIGHESTSTRUCTURE

BLDG.HIGHEST

+11.00mPDLVL.

BLDG. HIGHESTLVL. +8.80mPD

+7.30mPDBLDG. HIGHESTLVL.








+16.150mPD

BLDG.HIGHESTLVL.


+11.00mPD

BLDG.HIGHESTLVL.


BLDG.HIGHESTLVL.+30.35mPD

+15.35mPDLVL.HIGHESTBLDG.


74

RETAINING WALL

RETAINING

WALL

1 : 2 FILL SLOPE

RETAINING WALL

RETAINING WALL

RETAINING WALL

1 : 2 FILL SLOPE

RETAININGWALL

RETAINING WALL

4.0m

6.4m 6.4m

6.0m

11.68m

6.0m

5.0m

5.0m

3.5m 3.5m

6.0m

10.0m

6.0m

6.0m

9.0m

4.0m

6.5m6.5m

3.m

38

4.0m

6.0m

4.0m

10.0m

7.0m

3m

5.5m

12A

STRUCTURE HIGHEST LVL.+28.20mPD



LOADING AND UNLOADING

AREA FOR ONE HV

(3.5m x 11m)

68

35A

22 23

24

FOR ONE HV

(3.5m x 11m)

UNLOADING AREA

LOADING AND

NATURALSLOPE

OUTFALL

BASE LVL.+1.640mPD

STRUCTURE

STRUCTURE

HIGHEST LVL

+60.570mPD

6.5m

+9.55mPD

BLDG. HIGHEST LVL.14

13A+13.528mPD

BLDG. HIGHEST LVL.

STRUCTUREHIGHEST

+106.00mPD

LVL.

7.2m

BASE LVL.+2.912mPD

+2.912mPDBASE LVL.

OUTFALL

72

-0.960mPDBASE LVL.STRUCTURE

BASE LVL.STRUCTURE

-0.96mPD72

STRUCTURE

-0.60mPDBASE LVL. 10

-0.062mPD

STRUCTUREBASE LVL.

LVL. +3.975mPDSTRUCTURE BASE



73 9

LVL. -0.80mPD

STRUCTURE

FD


G

A2

B

+5.7 m P.D.

E

CH+11.56mPD

LVL.HIGHESTBLDG.

25 4m4m4m

4m

7m

1 : 2 SLOPE

TEMPORARY SLIPWAY

13ISO CYLINDER

RACK

ISO CYLINDER

RACK

LVL. +10.00mPDBLDG. HIGHEST

+11.00mPD

LVL.HIGHESTBLDG.

A1

CAR PARX(FOR 4 PC)

OIL UNLOADING AND HEAVY LOAD BERTHS

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA) (EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA) (EVA)(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

HRSG ROAD 8

HRSG ROAD 6

HRSG ROAD 5

HRSG ROAD 1

HRSG ROAD 2

HRSG ROAD 3

HRSG ROAD 4

HRSG ROAD 3

HRSG ROAD 4

HRSG ROAD 2

HRSG ROAD 1

HRSG ROAD 5

HRSG ROAD 7

HRSG ROAD 6

HRSG ROAD 8

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

3.2m WIDE PIPE

TRENCH AT CENTER

LINE OF EVA

ROUTE

(EVA)

(EVA)

7

+5.20m.P.D.

+5.20m.P.D.

+5.50m.P.D.

+5.20m.P.D.

+5.70m.P.D.

+5.70m.P.D.

+5.70m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+6.00m.P.D.

+10.00m.P.D. +6.00m.P.D.

+6.00m.P.D.+11.00m.P.D.

+10.00m.P.D.

75

76

71

71

7171

10

I69

STRUCTURE

+2.305mPDBASE LVL.

PFA PIPELINE & GASPIPE

TRENCH UNDER TRACK

TRENCH UNDER TRACK


CENTRAL ROAD WEST

C.W. PUMP ROAD EAST

7171

71

71

76

75

PFA PIPELINE

UNDER TRACK

UNDER TRACK

PFA PIPELINE

TEMPORARY

END OF BERTHS END OF BERTHS

FUTURE

HELIPAD

80

86

85

88

87

PERIMETER ACCESS ROAD

89

EnvironmentalResourcesManagement

Proposed Project Boundary (Land-based)

Annex A1

File: T:\GIS\CONTRACT\0308057\Mxd\0308057_Proposed_Project_Boundary_AnnexA1.mxdDate: 30/9/2015

LegendWater Intake Area for CCGT No.1

Water Intake Area for CCGT No.2

! ! Water Discharge Area for CCGT No.1


New Generation Area


0 200100Meters

´Water Intake Area

ElectroChlorinationArea

New Generation Area

Water Treatment Facility


Black PointPower Station

Urmston Road

Container Yards

Lung Kwu Tan

Hill

Hill

HK SludgeTreatment Centre

Key

Site Boundaryof BPPS(Land-based)


Annex A2

FILE: 0308057aDATE: 03/08/2015

Location of Black Point Power Station

Annex B

Selected Site Photographs

and Site Walkover Checklist

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Annex B1

Selected Site Photographs Black Point Power Station

A4 0

ERM-Hong Kong, Limited 16/F Berkshire House 25 Westlands Road Quarry Bay, HK Tel: (852) 2271 3000 Fax: (852) 2723 5660

© ERM

This print is confidential and is supplied on the understanding that it will be used only as a record to identify or inspect parts, concepts or designs and that it is not disclosed to other persons or to be used for construction purposes without permission.

CLP CCGT EIA

Photo 2: Gate entrance to the New Generation

Area, noted the warehouse afar.

Photo 3: Temporary contractor offices within the

New Generation Area.

Photo 4: The temporary warehouse and materials

stored next to it.

Photo 6: Vehicle access road separating the New

Generation Area.

Photo 5: Material storage inside the warehouse.

Photo 1: Southern perimeter of the New Genera-

tion Area

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© ERM


CLP CCGT EIA

Photo 8: Part of the vacant New Generation Area Photo 9: Future alignment of water intake pipe-

lines—vehicle access road

Photo 10: Proposed pump house and foam moni-

toring house location.

Photo 12: Future vehicle access road, currently

part of a temporary contractor site office.

Photo 11: The proposed Electrochlorination Area

vehicle access road

Photo 7: Material storage at the New Generation

Area

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© ERM


CLP CCGT EIA

Photo 14: Future proposed water discharge pipe alignment next to the sea bank.

Photo 15: Fire water pump house next to the pro-posed water treatment plant.

Photo 16: Material storage located at the proposed water treatment plant.

Photo 18: Green area and vehicle access roads adjacent to the New Generation Area.

Photo 17: Proposed outfall of discharged water.

Photo 13: Part of the proposed water discharge alignment, a vehicle access road.


Annex B4 Site Walkover Checklist

General Site Details

Site Owner/Client: The Site was part of the Black Point Power Station (BPPS) under the management of Castle Peak Power Company Ltd (CAPCO).

Property Address: BPPS, Tuen Mun, N.T.

Person Conducting the Questionnaire:

- Name: Lam Ho Yin, Stephen

- Position: Consultant

Authorized Owner/Client Representative (If Applicable):

- Name: Lau Sin Wai, Oscar

- Position: Safety, Health and Environmental Officer

- Telephone: 2678 4062

Site Activities

Briefly describe activities carried out on-site, including types of products/chemicals/materials handled. Obtain a flow schematic if possible.

Number of employees:

- Full-time: Varying

- Part-time: Varying.

- Temporary/Seasonal: Varying.

Maximum no. of people on site at any time: Not specifically stated.

Typical hours of operation: continuous operation.

Number of shifts: Not specifically stated.

Days per week: Seven (7) days a week.

Weeks per year: Not specifically stated.

Scheduled plant shut-down: NA.

Detail the main sources of energy at the site:

- Gas: Yes (natural gas).

- Electricity: Yes.

- Coal: NA.

- Oil: Yes.

- Other: NA.

Site Description

This section is intended to gather information on site setting and environmental receptors on, adjacent or close to the site.

What is the total site area: The site investigation area for plant area is approximately 4,000 m2.

What area of the site is covered by buildings (%): Area of the Site covered by buildings is less than 10%.

Please list all current and previous owners/occupiers if possible. The Site was part of the BPPS under the management of CAPCO since the development of the BPPS in 1993.

Is a site plan available? If yes, please attach. Yes (See Annex A).

Are there any other parties on site as tenants or sub-tenants? No.

If yes, identify those parties: NA.

Describe surrounding land use (residential, industrial, rural, etc.) and identify neighbouring facilities and types of industry.

- North: Immediate to the north is the mouth of Shenzhen Bay. Further north is Shenzhen.

- East: Immediate to the east is a mountain. Further east is the Hong Kong Sludge Treatment Facility and the West New Territories Landfill.

- South: Immediate to the south is part of a mountain. Further south includes a cluster of open materials/ container storage owned by multiple entities.

- West: Immediate to the west is the shore of Urmston Road Navigation Channel..

Describe the topography of the area (flat terrain, rolling hills, mountains, by a large body of water, vegetation, etc.).

The Site is situated on a slope descending from south to north, artificially flattened and paved with concrete.

State the size and location of the nearest residential communities.

The nearest residential communities is Lung Kwu Tan Village located approximately one (1) km due southeast of the Site.

Are there any sensitive habitats nearby, such as nature reserves, parks, wetlands or sites of special scientific interest?

NA.

Questionnaire with Existing/Previous Site Owner or Occupier Yes/ No Notes 1. What are the main activities/operations at the

above address? NA Inert material storages,

contractor offices, roads

2. How long have you been occupying the site? NA Since development of the site in 1993.

3. Were you the first occupant on-site? (If yes, what was the usage of the site prior to occupancy.)

Yes CAPCO is the first occupant of the site.

4. Prior to your occupancy, who occupied the site? NA NA

5. What were the main activities/operations during their occupancy?

NA NA.

6. Have there been any major changes in operations carried out at the site in the last 10 years?

No NA.

7. Have any polluting activities been carried out in the vicinity of the site in the past?

No NA.

8. To the best of your knowledge, has the site ever been used as a petrol filling station/car service garage?

No NA.

9. Are there any boreholes/wells or natural springs either on the site or in the surrounding area?

No Yes, boreholes were conducted at vicinity of the site.

10. Do you have any registered hazardous installations as defined under relevant ordinances? (If yes, please provide details.)

Yes Yes in BPPS as a whole, but no hazardous installations were located within the Site.

11. Are any chemicals used in your daily operations? (If yes, please provide details.) •Where do you store these chemicals?

No NA

No chemical is used within the Site

12. Material inventory lists, including quantities and locations available? (If yes, how often are these inventories updated?)

No NA.

Yes/ No Notes 13. Has the facility produced a separate hazardous

substance inventory? No No hazardous substance

stored within the site.

14. Have there ever been any incidents or accidents (e.g. spills, fires, injuries, etc.) involving any of these materials? (If yes, please provide details.)

Yes A spillage incident was recorded outside the entrance to the New Generation Area along the transformer road (not within assessment area). A puncture was found at the oil hose of a mobile crane and leakage of hydraulic oil was found from the broken hose.

Spilled oil was soaked with sorbents immediately and pathway to floor drain was protected with buns. Soaked sorbents were removed and dispose as chemical waste.

15. How are materials received (e.g. rail, truck, etc.) and stored on site (e.g. drums, tanks, carboys, bags, silos, cisterns, vaults and cylinders)?

NA Only inert construction materials were transported into/ out of the New Generation Area by truck.

16. Do you have any underground storage tanks? (If yes, please provide details.) •How many underground storage tanks do you have on-site? •What are the tanks constructed of? •What are the contents of these tanks? •Are the pipelines above or below ground? •If the pipelines are below ground, has any leak and integrity testing been performed? •Have there been any spills associated with these tanks?

No NA NA NA NA NA NA

NA.

17. Are there any disused underground storage tanks?

No NA.

18. Do you have regular check for any spillage and monitoring of chemicals handled? (If yes, please provide details.)

No No chemical was used within the site.

19. How are the wastes disposed of? NA Wastes were centrally stored at the waste storage area of BPPS (not within the Site).

20. Have you ever received any notices of violation of environmental regulations or received public complaints? (If yes, please provide details.)

No NA.

21. Have any spills occurred on-site? (If yes, please provide details.) •When did the spill occur? •What were the substances spilled? •What was the quantity of material spilled? •Did you notify the relevant departments of the spill? •What were the actions taken to clean up the spill? •What were the areas affected?

No NA NA NA NA NA NA

NA.

Yes/ No Notes 22. Do you have any records of major renovation of

your site or re- arrangement of underground utilities, pipe work/underground tanks (If yes, please provide details.)

No NA.

23. Have disused underground tanks been removed or otherwise secured (e.g. concrete, sand, etc.)?

No NA.

24. Are there any known contaminations on-site? (If yes, please provide details.)

No NA.

25. Has the site ever been remediated? (If yes, please provide details.)

No NA.

Observation

Yes/ No Notes 1. Are chemical storage areas provided

with secondary containment (i.e. bund walls and floors)?

NA No chemical storage was located within the Site

2. What are the conditions of the bund wall and floors?

NA NA

3. Are any surface water drains located near to drum storage and unloading areas?

NA NA

4. Are any solid or liquid waste (other than wastewater) generated at the site? (If yes, please provide details.)

Yes Only general wastes and construction wastes were generated from the site..

5. Is there a storage site for the wastes? No The waste storage area of BPPS is not located within the site.

6. Is there an on-site landfill? No NA

7. Were any stressed vegetation noted on site during the site reconnaissance? (If yes, please indicate location and approximate size.)

No NA

8. Were any stained surfaces noted on-site during the site reconnaissance? (If yes, please provide details.)

No NA

9. Are there any potential off-site sources of contamination?

Yes Area surrounding the site were used as power generation facilities and include installations such as generators, transformers and oil tanks.

10. Does the site have any equipment which might contain polychlorinated biphenyls (PCBs)?

No Transformers were installed in BPPS, but were not within the Site.

11. Are there any sumps, effluent pits, interceptors or lagoons on site?

No NA

12. Any noticeable odours during site walkover?

No NA

13. Are any of the following chemicals used on sire: fuels, lubricating oils, hydraulic fluids, cleaning solvents, used chemical solutions, acids, anti-corrosive paints, thinners, coal, ash, oily tanks and bilge sludge, metal wastes, wood preservatives and polyurethane foam?

No NA

Annex C

Referenced Aerial Photographs

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Annex C1

Referenced Aerial Photographs CLP Black Point Power Station

A4 0


© ERM


CLP CCGT EIA Approximate Area of Water Discharge Facility

Source - GEO INFO, Lands Department, HKSARG

Year 1992 (ref: A32845, height: 10,000ft) — Site of the Black Point Power Station

prior to reclamation.

Year 1993 (ref: CN 5914, height: 10,000ft) — Reclamation of the area where the

BPPS has been complete. Construction is in the early stages with no buildings

erected yet.

Approximate Area of New Gas Turbines

Approximate Area of Water Intake Facilities

Approximate Area of Electrochlorination Unit

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© ERM




Year 1994 (ref: CN6627, height: 4,500) — BPPS construction is still on-going with

evidence of buildings starting to be erected. The areas for the proposed work

appear to be unpaved with concrete and mainly used for material storage.

Year 1995 (ref: CN 13146, height: 3,500ft) — Construction of BPPS is starting to

approach completion with the main power generation buildings in the final stag-

es of construction.




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© ERM




Year 1997 (ref: CN17011, height: 4,000) — BPPS has been completed in 1996. No

significant changes were noted to have been made after almost 1 year of comple-

tion.

Year 2015 (ref: CS55456, height: 6,000ft) — Overview of the BPPS in the most

recent aerial photographs. No significant changes have been made to the land

use since commencement of operation.




Annex D

Letter from FSD on Fire Incidents, Chemical Spillage and DG Storage

Facsimile Environmental Resources Management 16/F, Berkshire House, 25 Westlands Road, Quarry Bay, Hong Kong

To: Access to Information Officer

Company: Fire Service Department

Fax number: 2739 5879

From: Kimberley Ip

File number:

Date: 15 July 2015

Number of pages: 2

Dear Sirs,

I would like to make an inquiry of information for the following on the CLP Black Point

Power Station:

1. historical spillage records

2. DG records

3. fire incident records

The area of interest of our research is highlighted in the Figure 1 below. The timeline of

the research will be from 1990 to present.

The mailing address of our company is 16/F, Berkshire House, 25 Westlands Road,

Quarry Bay, Hong Kong.

Please kindly address the information to Ms. Kimberley Ip, fax number is 27235660.

Yours sincerely, Kimberley Ip

Assistant Consultant

Direct Tel: 22713112

E-mail: [email protected].

mailto:[email protected]

P A G E 2

Figure 1: Areas of interest

Figure 2: Location of target, Black Point Power Station, Yung Long Road,

Lung Kwu Tan, Tuen Mun, New Territories, Hong Kong

Facsimile Environmental Resources Management 16/F, Berkshire House, 25 Westlands Road, Quarry Bay, Hong Kong

To: Access to Information Officer

Company: Fire Service Department

Fax number: 2739 5879

From: Stephen Lam

File number:

Date: 23 September 2015

Number of pages:

Dear Sirs,

Further to our letter of request sent on 15 July 2015 and your reply received by us on 6

August 2015 (see attached in Appendix A), we would like to make an inquiry of additional

information for the following on the CLP Black Point Power Station:

1. historical spillage records

2. DG records

3. fire incident records

The area of interest of our research is slightly changed as compared that attached in the

previous letter of request (please refer to Figure 1). The timeline of the research will be from

1990 to present.

The mailing address of our company is 16/F, Berkshire House, 25 Westlands Road, Quarry

Bay, Hong Kong.

Please kindly address the information to Mr. Stephen Lam, fax number is 27235660.

Yours sincerely, Stephen Lam

Consultant

Direct Tel: 22713391

E-mail: [email protected]

P A G E 2

Figure 1: Areas of interest

Figure 2: Location of target

P A G E 3

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+11.00mPDLVL.










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74

RETAINING WALL

RETAINING

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LOADING AND

NATURALSLOPE

OUTFALL

BASE LVL.+1.640mPD

STRUCTURE

STRUCTURE

HIGHEST LVL

+60.570mPD

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+9.55mPD


13A+13.528mPD

BLDG. HIGHEST LVL.

STRUCTUREHIGHEST

+106.00mPD

LVL.

7.2m

BASE LVL.+2.912mPD

+2.912mPDBASE LVL.

OUTFALL

72


BASE LVL.STRUCTURE

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STRUCTURE


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73 9

LVL. -0.80mPD

STRUCTURE

FD


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B

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E

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LVL.HIGHESTBLDG.

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A1

CAR PARX(FOR 4 PC)


(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA) (EVA)

(EVA)

(EVA)

(EVA)

(EVA)

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(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA) (EVA)(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

HRSG ROAD 8

HRSG ROAD 6

HRSG ROAD 5

HRSG ROAD 1

HRSG ROAD 2

HRSG ROAD 3

HRSG ROAD 4

HRSG ROAD 3

HRSG ROAD 4

HRSG ROAD 2

HRSG ROAD 1

HRSG ROAD 5

HRSG ROAD 7

HRSG ROAD 6

HRSG ROAD 8

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(EVA)

(EVA)

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(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

3.2m WIDE PIPE

TRENCH AT CENTER

LINE OF EVA

ROUTE

(EVA)

(EVA)

7

+5.20m.P.D.

+5.20m.P.D.

+5.50m.P.D.

+5.20m.P.D.

+5.70m.P.D.

+5.70m.P.D.

+5.70m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+6.00m.P.D.

+10.00m.P.D. +6.00m.P.D.

+6.00m.P.D.+11.00m.P.D.

+10.00m.P.D.

75

76

71

71

7171

10

I69

STRUCTURE

+2.305mPDBASE LVL.


TRENCH UNDER TRACK

TRENCH UNDER TRACK


CENTRAL ROAD WEST

C.W. PUMP ROAD EAST

7171

71

71

76

75

PFA PIPELINE

UNDER TRACK

UNDER TRACK

PFA PIPELINE

TEMPORARY


FUTURE

HELIPAD

80

86

85

88

87


89


Proposed Project Boundary (Land-based)

Annex A1

File: T:\GIS\CONTRACT\0308057\Mxd\0308057_Proposed_Project_Boundary_AnnexA1.mxdDate: 30/9/2015

LegendWater Intake Area for CCGT No.1




New Generation Area


0 200100Meters

´Water Intake Area


New Generation Area



Annex E

Proposed Site Investigation Plan

!!

! ! ! !

!

!!!

!!!!!!!!!!!!!!!!!!!!!

!

!

! !!

! !!! ! !

!

!!

!!

!! ! ! ! ! ! !

!! ! ! ! ! ! ! ! ! ! ! !

!!

!

!

! !

!

!

A A

A

A

A A

A A

A

A

A

A

A

A

A

A

A

A

GF

4


2222 2 2 2 2

28

C.W. INTAKE

CAR PARK

CAR PARK

CAR PARK

61

66

5945

17

1016

181819

43

15

11

12

10

61

5

35

4

3

1

102929292929 29 29 6767

30

3232323232

36

37

1

29

10

323333

31

41

41A

40

42 10

444444

26

25

26

OIL TANK ROAD

TRACK

STATION

ENTRA

NCE R

OAD W

EST

C.W. OUTFALL

SEAL PIT ROAD

HRSG ROAD 7


NULLAH

NULLAH

PFA TRACK

EASTERN ROAD


SEA BANK ROAD

CHIMNEY ROAD


TRANSFORMER ROAD

NULLAH

+10.00m.P.D.

+5.73m.P.D.+5.73m.P.D.

+5.89m.P.D.

+5.73m.P.D.

+10.00m.P.D.

CAR PARK

NULLAH

ENTRANCE ROAD

CENTRAL ROAD EAST

CENTRAL ROAD


NULLAH


+5.73m.P.D.

NULLA

H



57

56

7.3m

5.8m

4.8m

CAR PARK

27

27

(FOR 50 PC)

(FOR 9LV, 7HV)

(FOR 53 PC)

(FOR 23 PC)

(FOR 24 PC)

CAR PARK (FOR 4 PC)

CAR PARK (FOR 8 PC)

(FOR 4 PC)CARPARK

+5.73m.P.D.

6m

6m

6m

6m

9.5m

15.4m

6m

5m

5m

7m

6m 6m 6m 6m 6m 6m 6m 6m

6m

6m

4m 4m 4m 4m

NATURALSLOPE

NATURALSLOPE

3m

5m

10m

17.5m

12m

5m

6m

5m

5m

6.5m

5m

5m

6m

NATURALSLOPE

G5

G1G2 G3

G4


BLDG.HIGHESTLVL.

+13.60mPD


BLDG.HIGHESTLVL.

+13.60mPD



BLDG. HIGHEST LVL.

+10.82mPD

BLDG.HIGHESTLVL.

+12.35mPD

+106.00mPD

LVL.

HIGHESTSTRUCTURE

BLDG.HIGHEST

+11.00mPDLVL.










+16.150mPD

BLDG.HIGHESTLVL.


+11.00mPD

BLDG.HIGHESTLVL.





74

RETAINING WALL

RETAINING

WALL

1 : 2 FILL SLOPE

RETAINING WALL

RETAINING WALL

RETAINING WALL

1 : 2 FILL SLOPE

RETAININGWALL

RETAINING WALL

4.0m

6.4m 6.4m

6.0m

11.68m

6.0m

5.0m

5.0m

3.5m 3.5m

6.0m

10.0m

6.0m

6.0m

9.0m

4.0m

6.5m6.5m

3.m

38

4.0m

6.0m

4.0m

10.0m

7.0m

3m

5.5m

12A





AREA FOR ONE HV

(3.5m x 11m)

68

35A

22 23

24

FOR ONE HV

(3.5m x 11m)

UNLOADING AREA

LOADING AND

NATURALSLOPE

OUTFALL

BASE LVL.+1.640mPD

STRUCTURE

STRUCTURE

HIGHEST LVL

+60.570mPD

6.5m

+9.55mPD


13A+13.528mPD

BLDG. HIGHEST LVL.

STRUCTUREHIGHEST

+106.00mPD

LVL.

7.2m

BASE LVL.+2.912mPD

+2.912mPDBASE LVL.

OUTFALL

72


BASE LVL.STRUCTURE

-0.96mPD72

STRUCTURE


-0.062mPD

STRUCTUREBASE LVL.




73 9

LVL. -0.80mPD

STRUCTURE

FD


G

A2

B

+5.7 m P.D.

E

CH+11.56mPD

LVL.HIGHESTBLDG.

25 4m4m4m

4m

7m

1 : 2 SLOPE

TEMPORARY SLIPWAY

13ISO CYLINDER

RACK

ISO CYLINDER

RACK


+11.00mPD

LVL.HIGHESTBLDG.

A1

CAR PARX(FOR 4 PC)


(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA) (EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA) (EVA)(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

HRSG ROAD 8

HRSG ROAD 6

HRSG ROAD 5

HRSG ROAD 1

HRSG ROAD 2

HRSG ROAD 3

HRSG ROAD 4

HRSG ROAD 3

HRSG ROAD 4

HRSG ROAD 2

HRSG ROAD 1

HRSG ROAD 5

HRSG ROAD 7

HRSG ROAD 6

HRSG ROAD 8

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

(EVA)

3.2m WIDE PIPE

TRENCH AT CENTER

LINE OF EVA

ROUTE

(EVA)

(EVA)

7

+5.20m.P.D.

+5.20m.P.D.

+5.50m.P.D.

+5.20m.P.D.

+5.70m.P.D.

+5.70m.P.D.

+5.70m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+10.00m.P.D.

+6.00m.P.D.

+10.00m.P.D. +6.00m.P.D.

+6.00m.P.D.+11.00m.P.D.

+10.00m.P.D.

75

76

71

71

7171

10

I69

STRUCTURE

+2.305mPDBASE LVL.


TRENCH UNDER TRACK

TRENCH UNDER TRACK


CENTRAL ROAD WEST

C.W. PUMP ROAD EAST

7171

71

71

76

75

PFA PIPELINE

UNDER TRACK

UNDER TRACK

PFA PIPELINE

TEMPORARY


FUTURE

HELIPAD

80

86

85

88

87


89

BH9BPBH9

BPBH1

BPBH8

BPBH7

BPBH6

BPBH5

BPBH4

BH8BH7

BH6BH5

BH4BH3

BH2BH1

BH10

BH11


Proposed Site Investigation Plan

Annex E

File: T:\GIS\CONTRACT\0308057\Mxd\0308057_Proposed_Site_Investigation_Plan_AnnexE.mxdDate: 28/10/2015

LegendGF Indicative Location of the Hydranlic Oil Leakage in 2012

A Site Investigation Conducted by CLP in 2012

A Proposed Borehole Locations





New Generation Area


0 200100Meters

´

Water Intake Area


New Generation Area



"GF

Annex F

Previous Ground Investigation Logs

A

B

C

D

1

2

100

12/12/2012

12/12/201214/12/2012

14/12/2012

5.60

2.90

1.90

1.70

PX

PX4.00

101 bls

CONCRETE slab.

Grey, fine to coarse SAND with occasionalangular to subangular fine to coarse GRAVELsized concrete fragments. (CEMENT MORTAR)

Wash boring, no sample recovered. Inferred asFILL.

Grey, COBBLE sized concrete fragments. (FILL)End of hole at 4.20m depth.

08:00

Dryat

18:00Dryat

08:00

2.82at

18:00

100

1.70

0.450.50

0.951.00

1.451.50

1.952.00

2.50

2.953.00

4.00

4.20

0.30

3.00

4.00

4.204.20

14/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-7

Dep

th

U76 undisturbed sample

Depth

Standard penetration test

Wat

er

No.

5.90

DATE

to

(m)

Tot

al c

ore

of

Water sample

17/12/2012

Gra

de

Large disturbed sample

FLUSHING MEDIUM

15/12/2012

808599.85

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 1

4500784154

Outline Agreement No 4600004073 2-Year Outline Agreement for Site Investigation Works for Existing / Prospective Sites of CLPPower's Premises (2010-2012) - BPPS Site Investigation for ADO Study

Impression packer test

REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+

In-situ vane shear test

HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.90 0.00

Water absorption (Packer) test

OUTLINE AGREEMENT 4600004073

1. 2 nos. inspection pits were dug to 1.70m and 2.00m depths.2. 3 nos. soil samples (0.50m, 1.50m and 3.00m) were sent toenvironmental laboratory for testing.3. Environmental pipe was installed at 4.20m depth.

DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample

Small disturbed sample

830110.72

Dril

ling Tests

1SHEET

ORIENTATION

11/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL

Piezometer / standpipe tip

PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

A

B

C

D

1

27

47

30

22/12/2012

22/12/201227/12/2012

27/12/2012

3.34

1.84

1.34

-1.71

PX

PX4.50

87 bls

Light brown and grey, fine to coarse SAND withmuch subangular fine to coarse gravel sized rockfragments. (FILL)

Brownish grey and pink, COBBLE sized rockfragments. (FILL)

Dark grey, pink and greyish brown, subangularfine to coarse GRAVEL and COBBLE sized rockfragments. (FILL)Pink and greyish pink, COBBLE with someangular medium to coarse gravel sized rockfragments. (FILL)

End of hole at 7.55m depth.

08:00

Dryat

18:00Dryat

08:00

4.06mat

18:00

0

-1.71

0.450.50

0.951.00

1.451.50

1.952.00

2.50

4.00

4.454.50

6.00

7.55

2.50

4.00

4.50

7.557.55

27/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-7

Dep

th


Depth


Wat

er

No.

5.84

DATE

to

(m)

Tot

al c

ore

of

Water sample

29/12/2012

Gra

de


FLUSHING MEDIUM

28/12/2012

808727.51

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 4

4500784154



REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+


HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.84 0.00



1. 6 nos. inspection pits were dug to 1.00m, 2.00m, 1.50m, 1.50m,1.50m and 2.00m depths.2. Environmental pipe was installed at 7.55m depth.DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample


830246.14

Dril

ling Tests

1SHEET

ORIENTATION

22/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL


PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

A

B

C

55

62

53

07/12/2012

07/12/201212/12/2012

12/12/2012

3.97

1.72

PX

PX2.90

Brown, fine to coarse SAND with some angularfine to coarse gravel sized rock fragments.(FILL)

Light brown and grey, angular coarse GRAVELand COBBLE sized rock and concrete fragments.(FILL)


08:00

Dryat

18:00Dryat

08:00

3.10mat

18:00 1.72

0.450.50

0.951.00

1.451.50

1.70

2.30

2.90

3.95

1.70

3.953.95

12/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-10

Dep

th


Depth


Wat

er

No.

5.67

DATE

to

(m)

Tot

al c

ore

of

Water sample

14/12/2012

Gra

de


FLUSHING MEDIUM

13/12/2012

808484.09

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 5

4500784154



REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+


HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.67 0.00



1. Inspection pit was dug to 1.50m depth.2. 2 nos. soil samples (0.50m and 1.50m) were sent to environmentallaboratory for testing.DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample


830266.17

Dril

ling Tests

1SHEET

ORIENTATION

07/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL


PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

A

B

C

D20

21/12/2012

21/12/201222/12/2012

22/12/2012

3.83

3.43

PX

PX2.00

Light brown, fine to coarse SAND with somesubangular fine to medium gravel sized rockfragments. (FILL)

Light grey and pink, COBBLE with occasionalsubangular coarse gravel sized rock fragments(FILL)End of hole at 2.40m depth.

08:00

Dryat

18:00Dryat

08:00Dryat

18:00

3.43

0.450.50

0.951.00

1.451.50

1.952.00

2.40

2.00

2.402.40

22/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-10

Dep

th


Depth


Wat

er

No.

5.83

DATE

to

(m)

Tot

al c

ore

of

Water sample

27/12/2012

Gra

de


FLUSHING MEDIUM

24/12/2012

808595.27

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 6

4500784154



REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+


HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.83 0.00



1. 3 nos. inspection pits were dug to 2.00m, 1.50m and 2.00m depths.2. 2 nos. soil samples (0.50m and 1.50m) were sent to environmentallaboratory for testing.DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample


830303.71

Dril

ling Tests

1SHEET

ORIENTATION

21/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL


PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

A

B

C

D

60

50

70

55

20/12/2012

20/12/201222/12/2012

22/12/2012

4.71

3.26

-1.59

PX

PX6.05

Grey, subangular fine to coarse GRAVEL sizedrock fragments in sandy matrix. (FILL)

Greyish brown, subangular fine to coarseGRAVEL sized rock fragments. (FILL)

Light grey and pink, subangular medium tocoarse GRAVEL and COBBLE sized rockfragments. (FILL)

4.65 - 4.93m: Boulder.


08:00

Dryat

18:00Dryat

08:00

7.30mat

18:00

1.06

0.78

-1.59

0.450.50

0.951.00

1.451.50

1.952.00

2.45

3.60

5.00

6.05

7.30

1.00

2.45

7.30

4.65

4.93

7.30

22/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-7

Dep

th


Depth


Wat

er

No.

5.71

DATE

to

(m)

Tot

al c

ore

of

Water sample

27/12/2012

Gra

de


FLUSHING MEDIUM

24/12/2012

808686.52

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 7

4500784154



REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+


HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.71 0.00



1. Inspection pit was dug to 2.00m depth.2. 2 nos. soil samples (0.50m and 1.50m) were sent to environmentallaboratory for testing.3. Environmental pipe was installed at 7.30m depth.

DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample


830333.38

Dril

ling Tests

1SHEET

ORIENTATION

20/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL


PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

A

B

C

1

2

3

4

86

88

68

28

17/12/2012

17/12/201218/12/2012

18/12/201219/12/2012

19/12/2012

4.08

3.08

1.58

0.08

-1.86

PX

PX5.50

187 bls

Dark brown, fine to coarse SAND with occasionalangular fine to coarse gravel sized rockfragments. (FILL)

Firm, brownish grey, sandy SILT with occasionalangular to subangular fine to medium gravelsized rock fragments. (FILL)

Dark grey, pink and orangish brown, angularcoarse GRAVEL and COBBLE sized rockfragments. (FILL)

3.76 - 4.00m: Boulder.

Dark grey and light brown, angular coarseGRAVEL and COBBLE sized rock fragments insandy matrix. (FILL)

Grey and light brown, angular coarse GRAVELand COBBLE sized rock fragments. (FILL)


08:00

Dryat

18:00Dryat

08:00

2.72mat

18:002.80m

at08:00

4.25mat

18:00

100

1.82

1.58

-1.86

0.450.50

0.951.00

1.451.50

1.952.00

2.50

3.20

4.00

4.454.50

4.955.00

5.50

6.00

7.44

1.50

2.50

4.00

5.50

7.44

3.76

4.00

7.44

19/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-7

Dep

th


Depth


Wat

er

No.

5.58

DATE

to

(m)

Tot

al c

ore

of

Water sample

21/12/2012

Gra

de


FLUSHING MEDIUM

20/12/2012

808633.85

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 8

4500784154



REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+


HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.58 0.00



1. 8 nos. inspection pits were dug to 0.85m, 0.85m, 0.85m, 0.85m,1.30m, 1.30m, 1.30m and 1.50m depths.2. 3 nos. soil samples (0.50m, 1.50m and 4.00m) were sent toenvironmental laboratory for testing.3. Environmental pipe was installed at 7.44m depth.

DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample


830410.48

Dril

ling Tests

1SHEET

ORIENTATION

17/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL


PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

A

B

C

1

88

56

76

100

17/12/2012

17/12/201218/12/2012

18/12/201219/12/2012

19/12/2012

3.90

1.40

0.90

0.70

PX

PX4.80

51 bls

Light brown, angular to subangular fine tocoarse GRAVEL sized rock and concretefragments. (FILL)

Pink, light brown and light grey, angular tosubangular coarse GRAVEL and COBBLE sizedrock fragments. (FILL)

Light brown, mottled dark grey, angular tosubangular fine to coarse GRAVEL sized rockfragments in sandy matrix. (FILL)Pink, COBBLE sized rock fragments. (FILL)End of hole at 5.00m depth.

08:00

Dryat

18:00Dryat

08:00

3.00mat

18:004.26m

at08:003.04m

at18:00

0

0.70

0.450.50

0.951.00

1.451.50

1.80

2.20

3.50

4.30

4.754.80

5.00

1.80

4.30

4.80

5.005.00

19/12/2012

Rec

over

y %

CHECKED

Water

PURCHASE ORDER No.

WATER

MACHINE & No.

PROJECT

Depth

MSK-10

Dep

th


Depth


Wat

er

No.

5.70

DATE

to

(m)

Tot

al c

ore

of

Water sample

21/12/2012

Gra

de


FLUSHING MEDIUM

20/12/2012

808895.04

R.Q

.D.

P O POON

Samples

(m)

Vertical

BPBH 9

4500784154



REMARKS

Red

uced

Permeability test

Cas

ing

METHOD

Type

Inde

x

E

W K SIU

mPD

Mazier sample

+


HOLE No.

N

Description

LOGGED

Sol

id c

ore

t:\gi

ntw

\libr

ary\

1jul

y20

09.g

lb\3

159

clp

dril

lhol

e

5.70 0.00



1. 4 nos. inspection pits were dug to 1.60m, 1.60m, 1.60m and 1.50mdepths.2. 3 nos. soil samples (0.50m, 1.50m and 4.30m) were sent toenvironmental laboratory for testing.3. Environmental pipe was installed at 5.00m depth.

DATE


Pro

gres

s

Fra

ctur

e

DATE from

Rec

over

y %

dept

h/si

ze

Rec

over

y %

SPT liner sample


830699.89

Dril

ling Tests

1SHEET

ORIENTATION

17/12/2012

CO-ORDINATES

Leve

l

Lege

nd

1

GROUND LEVEL


PRELIMINARY

Rotary

DRILLHOLE RECORD

Piston sample

Annex G

Schematic Drawing of Groundwater Monitoring Well

Cap

Flush Mount Well Cover Concrete Pad

Coarse Sand Pack

Seal Cap

Minimum 2 Metres

PerforatedPipe Screen(1mm or lessslot aperture)

Solid Pipe

Sand Filter Pack

BentoniteGrouting

Ground Water Level

Ground Ground

Annex G

FILE: 0131608a

DATE: 04/04/2011


Schematic Drawing of Groundwater Monitoring Well

Minimum 1 Metres

Minimum 50 mm

Minimum 100 mm

Annex H

Risk-based Remediation Goals

Chemical

Risk-Based Remediation Goals for SoilSoil Saturation

Limit (Csat

) (mg/kg)Urban Residential (mg/kg)

Rural Residential (mg/kg)

Industrial (mg/kg)

Public Parks (mg/kg)

VOCs

Acetone 9.59E+03 4.26E+03 1.00E+04* 1.00E+04* ***

Benzene 7.04E-01 2.79E-01 9.21E+00 4.22E+01 3.36E+02

Bromodichloromethane 3.17E-01 1.29E-01 2.85E+00 1.34E+01 1.03E+03

2-Butanone 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04* ***

Chloroform 1.32E-01 5.29E-02 1.54E+00 2.53E+02 1.10E+03

Ethylbenzene 7.09E+02 2.98E+02 8.24E+03 1.00E+04* 1.38E+02

Methyl tert-Butyl Ether 6.88E+00 2.80E+00 7.01E+01 5.05E+02 2.38E+03

Methylene Chloride 1.30E+00 5.29E-01 1.39E+01 1.28E+02 9.21E+02

Styrene 3.22E+03 1.54E+03 1.00E+04* 1.00E+04* 4.97E+02

Tetrachloroethene 1.01E-01 4.44E-02 7.77E-01 1.84E+00 9.71E+01

Toluene 1.44E+03 7.05E+02 1.00E+04* 1.00E+04* 2.35E+02

Trichloroethene 5.23E-01 2.11E-01 5.68E+00 6.94E+01 4.88E+02

Xylenes (Total) 9.50E+01 3.68E+01 1.23E+03 1.00E+04* 1.50E+02

SVOCs

Acenaphthene 3.51E+03 3.28E+03 1.00E+04* 1.00E+04* 6.02E+01

Acenaphthylene 2.34E+03 1.51E+03 1.00E+04* 1.00E+04* 1.98E+01

Anthracene 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04* 2.56E+00

Benzo(a)anthracene 1.20E+01 1.14E+01 9.18E+01 3.83E+01

Benzo(a)pyrene 1.20E+00 1.14E+00 9.18E+00 3.83E+00

Benzo(b)fluoranthene 9.88E+00 1.01E+01 1.78E+01 2.04E+01

Benzo(g,h,i)perylene 1.80E+03 1.71E+03 1.00E+04* 5.74E+03

Benzo(k)fluoranthene 1.20E+02 1.14E+02 9.18E+02 3.83E+02

bis-(2-Ethylhexyl)phthalate 3.00E+01 2.80E+01 9.18E+01 9.42E+01

Chrysene 8.71E+02 9.19E+02 1.14E+03 1.54E+03

Dibenzo(a,h)anthracene 1.20E+00 1.14E+00 9.18E+00 3.83E+00

Fluoranthene 2.40E+03 2.27E+03 1.00E+04* 7.62E+03

Fluorene 2.38E+03 2.25E+03 1.00E+04* 7.45E+03 5.47E+01

Hexachlorobenzene 2.43E-01 2.20E-01 5.82E-01 7.13E-01

Indeno(1,2,3-cd)pyrene 1.20E+01 1.14E+01 9.18E+01 3.83E+01

Naphthalene 1.82E+02 8.56E+01 4.53E+02 9.14E+02 1.25E+02

Phenanthrene 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04* 2.80E+01

Phenol 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04* 7.26E+03

Pyrene 1.80E+03 1.71E+03 1.00E+04* 5.72E+03

Metals

Antimony 2.95E+01 2.91E+01 2.61E+02 9.79E+01

Arsenic 2.21E+01 2.18E+01 1.96E+02 7.35E+01

Barium 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04*

Cadmium 7.38E+01 7.28E+01 6.53E+02 2.45E+02

Chromium III 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04*

Chromium VI 2.21E+02 2.18E+02 1.96E+03 7.35E+02

Cobalt 1.48E+03 1.46E+03 1.00E+04* 4.90E+03

Copper 2.95E+03 2.91E+03 1.00E+04* 9.79E+03

Lead 2.58E+02 2.55E+02 2.29E+03 8.57E+02

Manganese 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04*

Mercury 1.10E+01 6.52E+00 3.84E+01 4.56E+01

Molybdenum 3.69E+02 3.64E+02 3.26E+03 1.22E+03

Nickel 1.48E+03 1.46E+03 1.00E+04* 4.90E+03

Tin 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04*

Zinc 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04*

Dioxins / PCBs

Dioxins (I-TEQ) 1.00E-03 1.00E-03 5.00E-03 1.00E-03

PCBs 2.36E-01 2.26E-01 7.48E-01 7.56E-01

Petroleum Carbon Ranges

C6 - C8 1.41E+03 5.45E+02 1.00E+04* 1.00E+04* 1.00E+03

C9 - C16 2.24E+03 1.33E+03 1.00E+04* 1.00E+04* 3.00E+03

C17 - C35 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+04* 5.00E+03

Other Inorganic Compounds

Cyanide, free 1.48E+03 1.46E+03 1.00E+04* 4.90E+03

Organometallics

TBTO 2.21E+01 2.18E+01 1.96E+02 7.35E+01

2-9

Notes:(1) For Dioxins, the cleanup levels in USEPA Off ice of Solid Waste and Emergency Response (OSWER) Directive of 1998 have been adopted. The

OSWER Directive value of 1 ppb for residential use has been applied to the scenarios of “Urban Residential”, “Rural Residential”, and “Public Parks”, while the low end of the range of values for industrial, 5 ppb, has been applied to the scenario of “Industrial”.

(2) Soil saturation limits for petroleum carbon ranges taken from the Canada-Wide Standards for Petroleum Hydrocarbons in Soil, CCME 2000.(3) * indicates a ‘ceiling limit ’ concentration.(4) *** indicates that the C

sat value exceeds the ‘ceiling limit ’ therefore the RBRG applies.

Table 2.1 Risk-Based Remediation Goals (RBRGs) for Soil & Soil Saturation Limit

2-10

Notes:(1) Blank indicates that RBRG could not be calculated because the toxicity or physical/chemical values were unavailable, or the condition of

Henry’s Law Constant>1.00E-05 was not met for the inhalation pathway.(2) Water solubilities for Petroleum Carbon Range aliphatic C9-C16 and greater than C16 generally are considered to be effectively zero and

therefore the aromatic solubility for C9-C16 is used.(3) * indicates a ‘ceiling limit ’ concentration.(4) *** indicates that the solubility limit exceeds the ‘ceiling limit ’ therefore the RBRG applies.

Chemical

Risk-Based Remediation Goals for GroundwaterSolubility Limit

(mg/L)Urban Residential (mg/L)

Rural Residential (mg/L)

Industrial (mg/L)

VOCs

Acetone 1.00E+04* 1.00E+04* 1.00E+04* ***

Benzene 3.86E+00 1.49E+00 5.40E+01 1.75E+03

Bromodichloromethane 2.22E+00 8.71E-01 2.62E+01 6.74E+03

2-Butanone 1.00E+04* 1.00E+04* 1.00E+04* ***

Chloroform 9.56E-01 3.82E-01 1.13E+01 7.92E+03

Ethylbenzene 1.02E+03 3.91E+02 1.00E+04* 1.69E+02

Methyl tert-Butyl Ether 1.53E+02 6.11E+01 1.81E+03 ***

Methylene Chloride 1.90E+01 7.59E+00 2.24E+02 ***

Styrene 3.02E+03 1.16E+03 1.00E+04* 3.10E+02

Tetrachloroethene 2.50E-01 9.96E-02 2.95E+00 2.00E+02

Toluene 5.11E+03 1.97E+03 1.00E+04* 5.26E+02

Trichloroethene 1.21E+00 4.81E-01 1.42E+01 1.10E+03

Xylenes (Total) 1.12E+02 4.33E+01 1.57E+03 1.75E+02

SVOCs

Acenaphthene 1.00E+04* 7.09E+03 1.00E+04* 4.24E+00

Acenaphthylene 1.41E+03 5.42E+02 1.00E+04* 3.93E+00

Anthracene 1.00E+04* 1.00E+04* 1.00E+04* 4.34E-02

Benzo(a)anthracene

Benzo(a)pyrene

Benzo(b)f luoranthene 5.39E-01 2.03E-01 7.53E+00 1.50E-03

Benzo(g,h,i)perylene

Benzo(k)f luoranthene

bis-(2-Ethylhexyl)phthalate

Chrysene 5.81E+01 2.19E+01 8.12E+02 1.60E-03

Dibenzo(a,h)anthracene

Fluoranthene 1.00E+04* 1.00E+04* 1.00E+04* 2.06E-01

Fluorene 1.00E+04* 1.00E+04* 1.00E+04* 1.98E+00

Hexachlorobenzene 5.89E-02 2.34E-02 6.95E-01 6.20E+00

Indeno(1,2,3-cd)pyrene

Naphthalene 6.17E+01 2.37E+01 8.62E+02 3.10E+01

Phenanthrene 1.00E+04* 1.00E+04* 1.00E+04* 1.00E+00

Phenol

Pyrene 1.00E+04* 1.00E+04* 1.00E+04* 1.35E-01

Metals

Antimony

Arsenic

Barium

Cadmium

Chromium III

Chromium VI

Cobalt

Copper

Lead

Manganese

Mercury 4.86E-01 1.84E-01 6.79E+00

Molybdenum

Nickel

Tin

Zinc

Dioxins / PCBs

Dioxins (I-TEQ)

PCBs 4.33E-01 1.71E-01 5.11E+00 3.10E-02

Petroleum Carbon Ranges

C6 - C8 8.22E+01 3.17E+01 1.15E+03 5.23E+00

C9 - C16 7.14E+02 2.76E+02 9.98E+03 2.80E+00

C17 - C35 1.28E+01 4.93E+00 1.78E+02 2.80E+00

Other Inorganic Compounds

Cyanide, free

Organometallics

TBTO

Table 2.2 Risk-Based Remediation Goals (RBRGs) for Groundwater and Solubility Limit

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