environmental assessment report project application

Block 5, Barangaroo and Hickson RoadSurfactant-Enhanced In Situ Chemical Oxidation (SISCO) and Surfactant-Enhanced Product Recovery (SEPR) Pilot Trial

November 2010 10051

Environmental Assessment ReportProject Application

Submitted toDepartment of PlanningOn Behalf of Lend Lease (Millers Point) Pty Ltd

JBA Urban Planning Consultants Pty Ltd ABN 84 060 735 104 ACN 060 735 104 w jbaplanning.com.auLevel 7, 77 Berry Street North Sydney NSW 2060 t +61 2 9956 6962 29 Beach Street Wollongong NSW 2500 t +612 4225 7680

Reproduction of this document or any part thereof is not permitted without prior written permission of JBA Urban Planning Consultants Pty Ltd.

JBA Urban Planning Consultants Pty Ltd operates under a Quality Management System. This report has been prepared and reviewed in accordance with that system. If the report is not signed below, it is a preliminary draft.

This report has been prepared by: Stephanie Ballango

Signature Date 05/11/10

This report has been reviewed by: Lesley Bull

Signature Date 05/11/10

Block 5, Barangaroo and Hickson Road Project Application – Pilot Trial | November 2010

JBA Urban Planning Consultants Pty Ltd 10051 i

Executive Summary 1

1.0 Introduction 3

1.1 Background 3 1.2 Summary of Approval Sought 5 1.3 Project Team 7

2.0 Site Analysis 9

2.1 Site Location and Context 9 2.2 Project Application Site Description 10 2.3 Land Ownership and Description 11 2.4 Existing Development and Structures 14 2.5 Traffic and Transport 15 2.6 Physical Characteristics 16 2.7 Surrounding Development 19

3.0 Stakeholder Engagement Strategy 20

3.1 Technical Working Groups 20 3.2 Stakeholder Consultation 22 3.3 Council and Agency Consultation 25

4.0 Proposed Project 27

5.0 Director General’s Environmental Assessment Requirements 32

6.0 Environmental Assessment 33

6.1 Relevant EPIs, Policies and Guidelines 33 6.2 Consistency with the Barangaroo Concept Plan 38 6.3 Traffic Management and Accessibility 38 6.4 Soil and Water Impact Assessment 40 6.5 Geotechnical Assessment 42 6.6 Remediation of Contaminated Material 43 6.7 Waste Management 43 6.8 Air Quality and Odour 44 6.9 Noise & Vibration 50 6.10 Health Impacts 60 6.11 Visual Impact Assessment 61 6.12 Environmental, Construction and Site Management 61 6.13 Heritage 62

7.0 Draft Statement of Commitments 64

7.1 Monitoring and Contingency Procedures 64 7.2 Traffic Management and Accessibility Impacts 64 7.3 Soil and Water 64 7.4 Waste Management 65 7.5 Air Quality and Odour 65 7.6 Noise & Vibration 65 7.7 Health 65 7.8 Environmental, Construction and Site Management 65 7.9 Heritage 65

8.0 Conclusion 67


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Figures

1 Locality Plan showing the approximate locations of the Pilot Trial sites 9 2 DECCW Declaration Area (in red) as provided in Remediation Site

Declaration 21122. 10 3 Site context plan 11 4 The Block 5 and Hickson Road Pilot Trial areas which form the

Project Application Site 11 5 Cadastral layout and land ownership plan 13 6 Site Plan of Block 5 Pilot Trial area (Source: VeruTek) 29 7 Site Plan of Hickson Road Trial Area (Source: VeruTek) 29 8 Example of a full scale S-ISCO® treatment facility 31 9 Barangaroo Zoning Map (Source: Major Development SEPP) 34 10 Hickson Road Zoning Map (Source: Sydney LEP) 35 11 Sensitive receptor locations 47 12 Pilot Trial locations and noise catchment areas 52 13 Sensitive receivers 53 14 Noise measurement locations 54 15 Combined indicative construction program 58

Tables

1 Technical Working Group Memberships for Implementation Plans/Strategies 21 2 Proposed consultation methods 24 3 Operating hours 31 4 Director General’s Environmental Assessment Requirements 32 5 Summary of AQIA dispersion modelling assumptions 46 6 Summary of adopted AQIA ambient air quality cirtieria and emissions rates 46 7 Predicted cumulative pollutant concentrations at sensitive receptors 49 8 Surveyed noise levels for daytime, evening and night periods at sensitive

residential receivers 55 9 Predicted noise levels – Residential receivers 57 10 Predicted noise levels – Commercial receivers 57 11 Predicted noise levels – Billabond Childcare Centre 58

Appendices

A Director General’s Environmental Assessment Requirements

NSW Department of Planning

B Work Plan

VeruTek Technologies

C S-ISCO Laboratory Treatability Study

VeruTek Technologies

D Survey Plan

Rygate and Company Pty Ltd

E Waste Management Plan

AECOM

F Noise and Vibration Impact Assessment

AECOM


JBA Urban Planning Consultants Pty Ltd 10051 iii

G Remediation Action Plan

ERM

H Construction Traffic Management Plan

AECOM

I Visual Impact Assessment

AECOM

J Photomontages

Virtual Ideas

K Non-Indigenous Archaeological Assessment

Casey and Lowe Pty Ltd

L Non Indigenous Archaeological Research Design and Management Strategy

Casey and Lowe Pty Ltd

M Aboriginal Archaeological and Cultural Heritage Assessment

Comber Consultants Pty Ltd

N Aboriginal Archaeological Management Plan and Research Design

Comber Consultants Pty Ltd

O Geotechnical Report

AECOM

P Soil and Water Management Plan

AECOM

Q Interpretation Strategy

Tanner Architects

R Air Quality Impact Assessment

AECOM

S Health Impact Assessment AECOM

T S-ISCO Construction Management Plan

AECOM

U SEPP 33 Assessment

AECOM


iv JBA Urban Planning Consultants Pty Ltd 10051

Statement of Validity Prepared under Part 3A of the Environmental Planning and Assessment Act, 1979 (as amended)

Environmental Assessment prepared by

Name Lesley Bull

Qualifications BTP, MEL

Address Level 7, 77 Berry Street, North Sydney

In respect of Study and Concept Plan Application

Concept Plan

Applicant name

Applicant address

Land to be developed

Proposed development

Environmental Assessment An Environmental Assessment (EA) is attached

Certificate I certify that I have prepared the content of this Environmental Assessment and to the best of my knowledge:

It is in accordance with the Environmental Planning and Assessment Act and Regulation.

It is true in all material particulars and does not, by its presentation or omission of information, materially mislead.

Signature

Name Lesley Bull

Date 5 November 2010


JBA Urban Planning Consultants Pty Ltd 10051 1

Executive Summary The Barangaroo Concept Plan was approved in February 2007 and covers whole of site urban design and policy initiatives and is the statutory master planning instrument, to guide the urban renewal of Barangaroo. In 2008, the Concept Plan was amended to increase the floor space and in 2009 was further amended to refine the Headland Park & Northern Cove. In May 2009, the Department of Environment Climate Change and Water (DECCW) declared specific portions of Barangaroo and of Hickson Road as a “remediation site” (Declaration Area) (under the provisions of the Contaminated Land Management Act 1997. The Barangaroo Delivery Authority, as owner of part of the “remediation site”, has prepared a Voluntary Management Plan (VMP) for the remediation. The Phase 1 VMP details the undertaking of S-ISCO and SEPR Pilot Trials as a key objective to determine the methodology for the remediation of the Declaration Area. The Barangaroo Delivery Authority has appointed Lend Lease to undertake the remediation of the declaration area, on behalf of the Authority.

Proposed Application

This Project Application seeks approval for the Pilot Trial of two in-situ technologies to remediate soil and groundwater contamination at Barangaroo Block 5 and a part of Hickson Road (Declaration Area) adjoining Barangaroo. These technologies are being assessed for potential future remediation of contaminated soils and groundwater (where selected) associated with NSW DECCW Remediation Site Declaration 21122, and potentially also the area adjacent. The proposed Pilot Trial constitutes investigation works that are being undertaken specifically as part of trialling and assessment of methodology options for the future remediation of the Barangaroo site and adjacent parts of Hickson Road, and are a pre-cursor to future full scale remediation works. The future remediation works for the site will be detailed in a separate and in a future Remediation Action Plan or Remediation Works Plan, as appropriate, which will form part of a future project application.

Environmental Assessment

The Project Application has considered and assessed a range of environmental issues including:

traffic management and accessibility;

soil and water impacts;

air, noise and odour impacts;

construction management;

waste management;

non indigenous archaeology;

indigenous archaeology; and

visual impacts.

This application demonstrates that any potential environmental impacts can be effectively managed, by the measures outlined within the Project Application and Draft Statement of Commitments.


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The objective of the Pilot Trial is to assess the effectiveness of the two nominated in situ technologies at remediating contaminated soils and groundwater on the site, in a manner that does not give rise to unacceptable impacts to human health or to the environment and to refine the design of these technologies for potential full scale implementation. As stated above, any full-scale remediation using these technologies will be the subject of a separate future Project Application. These proposed technologies have been selected as the current preferred remediation method based on a number of key benefits, including:

the methods are less intrusive than traditional ex-situ treatment techniques which would involve the removal of contaminated soil and groundwater and its transportation for subsequent treatment. The in-situ technologies, if proved successful through trialling, will avoid the need for excavation of contaminated soils from both Block 5 and Hickson Road and subsequent transportation to a treatment site of Barangaroo, which would benefit the local community through the reduction in environmental impacts including air, odour, noise and vibration impacts.

SEPR and S-ISCO are considered sustainable technologies that can achieve remediation with a lower energy use and waste generation compared to ex-situ treatments and disposal methods. This minimises waste to landfill and associated truck movements.

SEPR and S-ISCO has been successfully proven at other gasworks sites.

as excavation of Block 5 or Hickson Road is not required as part of Barangaroo Stage 1 works, an in-situ method is likely a more cost-effective approach than ex-situ methods.



1.0 Introduction This Project Application and Environmental Assessment Report (EAR) is submitted to the Minister for Planning pursuant to Part 3A of the Environmental Planning and Assessment Act 1979 (NSW) (EP&A Act). This Project Application seeks approval for the Pilot Trialling of two in-situ remediation methods known as Surfactant-Enhanced In Situ Chemical Oxidation (S-ISCO) and Surfactant-Enhanced Product Recovery (SEPR), to verify their effectiveness in addressing the contaminants in the soil and groundwater within parts of the Barangaroo site and Hickson Road within the area subject of the Declaration of Remediation Site No 21122 (Declaration Area) as described in Section 4.0 of this EAR. The Pilot Trial areas are hereafter referred to as the Project Application Site. In May 2009, the Environmental Protection Authority (EPA) declared a part of the former Millers Point gasworks as a remediation site under the Contaminated Land Management Act 1997 (NSW) (the Declaration Area). The Declaration Area (Declaration No. 21122) includes parts of the Hickson Road reservation immediately adjacent to Barangaroo, as well as parts of Blocks 3, 4 and 5 of the Barangaroo site. This EAR has been prepared by JBA Urban Planning Consultants Pty Ltd, for the proponent, Lend Lease (Millers Point) Pty Ltd, and is based on the Work Plan: Surfactant Enhanced In Situ Chemical Oxidation and Surfactant Enhanced Property Recovery: Block 5 and Hickson Road Pilot Trial (the Work Plan) prepared by VeruTek Technologies (Appendix B) and other supporting technical documents provided by the expert consultant team (see Table of Contents). The EAR describes the Project Application Site, its environment and the proposed development, and includes an assessment of the proposal in accordance with the Director-General’s Environmental Assessment Requirements (DGRs) under Part 3A of the EP&A Act (Appendix A). It should be read in conjunction with the studies and other information appended to this report which addresses the DGRs for the environmental assessment. The studies provide a technical assessment of the environmental impacts of the proposed development, and recommend proposed mitigation measures to manage potential human health and environmental impacts associated with the proposal.

1.1 Background

1.1.1 Approved Concept Plan An international design competition for Barangaroo was held in 2005, attracting 139 entries from around the world. The winning design by Hill Thalis Architecture + Urban Projects, Paul Berkemeier Architects and Jane Irwin Landscape Architecture was announced in March 2006 together with a naming competition for the new headland precinct. The jury recommended key changes to the winning proposal which were required to be incorporated into the Barangaroo Concept Plan development. The Barangaroo Concept Plan was approved in February 2007. The Concept Plan covers urban design and policy initiatives and is the statutory planning approval to guide the urban renewal of Barangaroo.



The Concept Plan approval (as modified) provides for:

A mixed use development involving a maximum of 489,500 m2 gross floor area (GFA), comprising of:

(a) a maximum of 97,075 m2 and a minimum of 58,245 m2 residential GFA; (b) a maximum of 50,000 m2 GFA for tourist uses; (c) a maximum of 39,000 m2 GFA for retail uses; and (d) a minimum of 2,000 m2 GFA for community uses.

Approximately 11 hectares of new public open space / public domain, with a range of formal and informal open spaces serving separate recreational functions and including a 1.4km public foreshore promenade.

A maximum of 8,500 m2 GFA for a passenger terminal and a maximum of 3,000 m2 GFA for active uses that support the public domain within the public recreation zone.

Built form design principles, maximum building heights and GFA for each development block within the mixed use zone.

Public domain landscape concept, including parks, streets and pedestrian connections.

Alteration of the existing seawalls and creation of two enlarged coves and a natural headland.

The Statements of Commitment approved under the existing Concept Plan (as modified) require a series of Implementation Plans and Strategies to be prepared prior to the lodgement of future project applications to address:

Design Excellence;

Public Domain;

Transport Management and Access;

Community and Social Impacts;

Utility Services and Infrastructure;

Housing;

Marketing and Promotion;

Retail Management; and

Geotechnical and Environmental Site Remediation.

The Statements of Commitment require the establishment of Technical Working Groups to prepare each Implementation Plan and Strategy. The Technical Working Groups have been convened and meet regularly (refer to Section 3 for further details).

1.1.2 Barangaroo Delivery Authority The Barangaroo Delivery Authority was established under the Barangaroo Delivery Authority Act 2009 (NSW) to manage the redevelopment of Barangaroo and to deliver world class benchmarks in urban design, public domain and sustainability. The creation of the Barangaroo Delivery Authority reinforces the NSW Government’s commitment to the delivery of Barangaroo in a coordinated and financially responsible manner. The Barangaroo Delivery Authority was established on 30 March 2009 under the Barangaroo Delivery Authority Act 2009. The Barangaroo Delivery Authority is subject to the control and direction of the NSW Premier.



The objects of the Act are:

to encourage the development of Barangaroo as an active, vibrant and sustainable community and as a location for national and global business;

to create a high quality commercial and mixed use precinct connected to and supporting the economic development of Sydney;

to facilitate the establishment of Barangaroo Headland Park and public domain land;

to promote the orderly and sustainable development of Barangaroo balancing social, economic and environmental outcomes; and

to create in Barangaroo an opportunity for design excellence outcomes in architecture and public domain design.

The Barangaroo Delivery Authority is the landowner of most of the Barangaroo site. The Barangaroo Delivery Authority has entered into a Phase 1 Voluntary Management Proposal (VMP) with the Environmental Authority, to undertake investigation works to determine the preferred remedial strategy to address the contamination identified in the Declaration Area. Lend Lease, has been appointed by the Barangaroo Delivery Authority, is to undertake investigation works in the Phase 1 VMP. The proposed Pilot Trials are part of the investigation works.

1.2 Summary of Approval Sought The proposed Pilot Trials will trial two in-situ remediation technologies to remediate contaminants present in the soil and groundwater at Barangaroo Block 5 and a part of Hickson Road adjoining Barangaroo. The objective of the Pilot Trial is to assess the effectiveness of the two nominated in-situ technologies at remediating contaminated soils and groundwater on the site, and to refine the design of these technologies for potential full scale implementation. The results of the Pilot Trials will also be used to refine the design of the full-scale Surfactant-Enhanced In-Situ Chemical Oxidation (S-ISCO) and Surfactant Enhanced Product Recovery (SEPR) remediation technologies, if they are proven to be effective and if they are approved by the EPA as the appropriate remedial technologies for the Declaration Area. This Project Application only relates to the SISCO and SEPR Pilot Trials. Any future full-scale implementation of SISCO and SEPR will be subject of a separate project application. These Pilot Trials will be undertaken as part of the investigation works set out in Phase 1 VMP agreed by the Barangaroo Delivery Authority with the EPA. Any future full-scale implementation of SISCO and SEPR will be subject of a separate VMP (i.e.: Phase 2 VMP) between the Department of Environment, Climate Change and Water (DECCW) and the Barangaroo Delivery Authority. As demonstrated by the S-ISCO Laboratory Treatability Study prepared by VeruTek Technologies (refer to Appendix C) a series of laboratory-scale tests have been conducted to investigate the effectiveness of the remediation technologies and to collect engineering data to refine the process for field application. These technologies are being assessed for potential future remediation of contaminated soils and groundwater associated with NSW DECCW Remediation Declaration Area, and potentially also the area adjacent.



The S-ISCO technology will be trialled to address contaminants present in the soil and groundwater at Block 5. A two phase treatment involving SEPR and S-ISCO techniques will be trialled to address contaminants present in an existing sub surface tar tank below Hickson Road. These Pilot Trials are proposed to demonstrate that where applied, remediation can be undertaken to address the NSW DECCW Remediation Site Declaration 21122 and the treated areas can be made suitable for the proposed future mixed use development of the site, through the full scale implementation of these in-situ technologies. These proposed technologies have been selected as the current preferred remediation method being pursued by Lend Lease for the Block 5 and Hickson Road sites within the Declaration Area following a detailed review of various options. They are preferred based on a number of key benefits, as outlined below:

the technologies are less intrusive than traditional ex-situ treatment techniques which would involve the removal of contaminated soil and groundwater and its transportation for subsequent treatment. The in-situ technologies, if proved successful through trialling, will avoid the need for excavation of contaminated soils from both Block 5 and Hickson Road and subsequent transportation to a treatment site of Barangaroo, which would benefit the local community through the reduction in environmental impacts including :

- a reduction in air quality and odour impacts associated with significant excavation, transportation, treatment and either reinstatement of the remediation work area or offsite disposal of treated soils;

- a reduction in noise and vibration impacts associated with excavation, transport, treatment and reinstatement (or offsite disposal) of contaminated soils;

- a reduction in heavy vehicular traffic arising from excavation, transport, treatment and reinstatement (or offsite disposal) of contaminated soils;

- avoiding the need for temporary closure, diversion and excavation of part of Hickson Road, and associated impacts on local community, service infrastructure and the like; and

- the need to relocate existing infrastructure services within Hickson Road is significantly diminished in comparison to ex situ remediation technologies.

SEPR and S-ISCO technologies are considered sustainable technologies that can achieve remediation with a lower energy use and waste generation compared to ex-situ treatments and disposal methods. This minimises waste to landfill and associated truck movements.

SEPR and S-ISCO technologies have shown promise for remediation at gasworks sites in the United States, but the technologies have not been employed in Australia;

The Pilot Trials are temporary and will only be in place for between approximately four to six months, with no permanent structures proposed after completion of the Pilot Trials. The proposed remediation technologies comprise several components which will be common across both the trial sites of Block 5 and Hickson Road. These generally include (but are not necessarily limited to):

establishment of treatment staging area on Block 5, drilling of subsurface wells and test points and installing various sub-surface product supply lines; and

establishment and operation of injection and monitoring wells.



The Block 5 Pilot Trial area will include (but is not limited to) the following distinct components:

installation of a bunded chemical storage area including a shipping container to be used for storage of some chemicals;

set up of injection system facility;

installation of double wall tanks for use in treatment process;

temporary facilities for testing of groundwater; and

installation of injection/extraction wells and associated equipment.

The Hickson Road Pilot Trial area will also include several distinct components including:

establishment of a temporary trench with a depth of 0.25m across Hickson Road to accommodate the Pilot Trial injection and extraction lines and installation of steel plates above the trench as approved for heavy traffic; and

the erection of a 2.4m high hoarding and temporary concrete barricade around the injection and monitoring wells to prevent public access and provide protection from traffic; and

installation of injection/extraction wells and associated equipment.

The injection system and storage area established for the Block 5 Pilot Trial will also service the trial works proposed within Hickson Road. Upon completion of the Pilot Trials, the works areas within Hickson Road would be reinstated to their original condition prior to the trial commencement, with the exception of flush well point covers. The trial is expected to take between approximately four to six months to complete.

1.3 Project Team The Barangaroo Delivery Authority has appointed Lend Lease to undertake remediation as a contractor. An expert project team has been formed to deliver the project and includes: Proponent Lend Lease (Millers Point) Pty Limited

Urban Planning JBA Urban Planning Consultants

Work Plan VeruTek Technologies

S-ISCO Laboratory Treatability Study VeruTek Technologies

Construction Traffic Management AECOM

SEPP 33 Assessment AECOM

Geotechnical AECOM

Soil and Water AECOM

Waste Management AECOM

Visual Impacts AECOM

Air Quality and Odour AECOM

Noise and Vibration AECOM

Health Impacts AECOM



Heritage

Interpretation Strategy Tanners Architects

Non Indigenous Archaeology Casey and Lowe

Indigenous Heritage and Archaeology Comber Consultants

Construction Management Plan VeruTek Technologies

Lend Lease has engaged AECOM to manage, co ordinate and undertake the Pilot Trials within the Project Application Site in addition to the undertaking of various environmental assessments that support the Project Application. AECOM have engaged VeruTek Technologies to undertake the specialist components of the Pilot Trial.



2.0 Site Analysis

2.1 Site Location and Context Barangaroo is located on the north western edge of the Sydney Central Business District, bounded by Sydney Harbour to the west and north, the historic precinct of Millers Point (for the northern half), The Rocks and the Sydney Harbour Bridge approach to the east; and bounded to the south by a range of new development dominated by large CBD commercial tenants. The 22 ha Barangaroo site is generally rectangular in shape and has a 1.4 kilometre harbour foreshore frontage, with an eastern street frontage to Hickson Road. The locational context of the Barangaroo site is shown in Figure 1 within the overall Barangaroo site. Barangaroo South is being redeveloped for a range of uses.

Figure 1 – Locality Plan showing the approximate locations of the Pilot Trial sites



2.2 Project Application Site Description The proposed Pilot Trials will be carried out on an area of land within Barangaroo referred to as Block 5, as well as an area of Hickson Road, beyond the eastern boundary of Barangaroo. As noted above, the EPA declared parts of Blocks 3, 4 and 5 within the Barangaroo site and parts of the immediately adjacent land within the Hickson Road reservation to be a remediation site under the Contaminated Land Management Act, 1997. The whole of the Project Application Site falls within the Declaration Area. Geotechnical investigations of the Declaration Area indicate that the site is underlain by manmade fill, which is in turn underlain by marine sediment and Hawkesbury Sandstone. The fill material is up to 17.5m deep and comprises a mix of silt clay, course gravel and fragments of concrete, brick, steel, glass and ash. Plans showing the location of the Declaration Area, as well as the context of the site are provided at Figures 2 and 3. The Block 5 and Hickson Road Pilot Trial sites, and the Pilot Trial sites within them which form the Project Application Site, are shown in Figure 4.

Figure 2 - DECCW Declaration Area (in red) as provided in Remediation Site Declaration 21122.



Figure 3 – Site context plan

Figure 4 - The Block 5 and Hickson Road Pilot Trial areas which form the Project Application Site

2.3 Land Ownership and Description A site survey plan is included at Appendix D. Land ownership is shown at Figure 5. Under the Barangaroo Delivery Authority Act 2009 (NSW), Barangaroo is defined as the land identified as the “Barangaroo Delivery Authority operational area on the Barangaroo Delivery Authority Operational Area Map”. The operational area comprises Lots 1-6 in DP 876514, Lot 7 in DP 43776, Lot 100 in DP 83823 and Lots 6 and 7 in DP 869022.

Approx. area of S-ISCO Pilot Trials

Block 5 Pilot Test Area



The Barangaroo Delivery Authority owns the majority of the Barangaroo site, however small areas are owned by other Government agencies including the Marine Ministerial Holding Corporation, the Maritime Services Board of NSW (NSW Maritime) and the Crown. The Project Application Site comprises part of Lot 3 in DP 876514 (the Block 5 Pilot Trial site) and STP 162 which forms part of the Hickson Road reservation (the Hickson Road Pilot Trial site). The Barangaroo Delivery Authority owns the Block 5 Pilot Trial site. Sydney City Council owns the Hickson Road portion of the Project Application Site. The Barangaroo Delivery Authority has issued landowner’s consent, as evidenced by the completed Application Form submitted under separate cover. Landowner’s consent will be obtained from Sydney City Council prior to determination of the Project Application in accordance with the Environmental Planning and Assessment Regulation, 2000.



Figure 5 - Cadastral layout and land ownership plan



2.4 Existing Development and Structures

2.4.1 Built Form The Block 5 Pilot Trial site is covered by a flat concrete and asphaltic concrete surface area. There is no development on the site apart from a two storey amenities building on the site’s eastern boundary with Hickson Road, which is proposed to be demolished prior to the Pilot Trial, under an existing consent (MP07_ 0077). Access to this part of the Project Application Site is currently restricted by a cyclone wire fence with three security gatehouses at locked gates. The Hickson Road Pilot Trial site is located within the City of Sydney’s road reserve, within the paved surface of the road and footpath in front of 36 Hickson Road. The Pilot Trial will be carried out within an existing circular tar tank beneath the Road’s surface. Hickson Road is a wide, asphaltic concrete road with a stone kerb and gutter. It carries two lanes of traffic (one north-bound lane and one south-bound lane) with parking on either side of the road.

2.4.2 Infrastructure and Services

Stormwater

The existing stormwater network within Barangaroo South is characterised by a series of transverse piped stormwater systems (typically between 450mm to 600mm in diameter) draining the Barangaroo South pavements, Hickson Road and other external catchments through the Barangaroo site directly to the Harbour. Existing pits and lines within Hickson Road generally feed into the Barangaroo stormwater network.

Water

The existing water supplies to the Barangaroo site are supplied from a 300mm diameter Sydney Water main in Hickson Road.

Sewer

There are existing Sydney Water sewer services within the Hickson Road road reserve that feed into an existing SWC SPS No 1129. A sewer rising main from SPS 1129 rises to the south east of the pump station, across Hickson Road through adjacent Lot 3 DP 873158. The Block 5 S-ISCO trial is to be undertaken directly adjacent SPS 1129, directly outside the SWC easement at its northern boundary. Access to SPS 1129 form Hickson Road and operation of SPS 1129 will be retained throughout the Pilot Trial.

RailCorp

An existing RailCorp High Voltage electrical main exists within the Hickson Road road reserve.

Electricity There are a number of existing 5kV HV Energy Australia (EA) supplies to the Barangaroo site. There are no substations within the Project Application Site. Street lighting on Hickson Road is serviced by existing in ground electrical supplies.

Telecommunications

A telephone exchange is located in Kent Street, and existing Telstra copper lines feed into the site at various locations along Hickson Road and Dalgety Road. There are mobile phone equipment shelters located near Hickson Road.



Natural Gas

There is an existing 110mm low pressure (7kPa) nylon gas main along Hickson Road and a high pressure gas main located at the corner of Sussex and Napoleon Streets. There is no existing high pressure main connection serving the Barangaroo site, however, there are small low pressure connections. The route of the Pilot Trial delivery and extraction lines within the Declaration Area and passing across the Hickson Road road reserve will be contained in a shallow trench which will typically cross the services discussed above which pass within the Hickson Road road reserve in a north south direction. Prior to the excavation of the Pilot Trial delivery and extraction lines across Hickson Road, appropriate steps will be undertaken to locate and protect then existing services within Hickson Road.

2.5 Traffic and Transport

2.5.1 Vehicular and Pedestrian Access Hickson Road connects into Sussex Street south of Napoleon Street and is the predominant north-south access road for the Project Application Site. Local road access to the Barangaroo site area is provided as follows:

from the CBD via Napoleon Street;

from Millers Point via Dalgety Road;

via George Street from the north east;

via Sussex Street / Kent Street / Napoleon Street from the southern CBD;

via Harbour Street, Wheat Road (through King Street Wharf) to Shelley Street from the south; and

via the east-west alignment of Napoleon Street and Margaret Street.

Key local intersections surrounding the site have been modelled as a component of previous studies, and were found as having reasonable levels of operation.

2.5.2 Public Transport The site is served by the following public transport modes:

Rail: Wynyard, Martin Place, Town Hall and Circular Quay railway stations are within viable walking distance of the Barangaroo site and provide frequent services throughout the day.

Bus: There is a major bus interchange located at Wynyard Station for buses servicing the Hills District, Northern Beaches and North Shore areas. These services all utilise the bus lane on the Harbour Bridge to access Wynyard.

A number of bus routes also terminate in the vicinity of the Barangaroo site, King Street Wharf and Circular Quay.

Ferry: Commuter ferry services arrive and depart from both King Street Wharf and Circular Quay.



2.5.3 Pedestrians and Cyclists

Pedestrian Access

Pedestrian access is available along all local roads, which are lined with footpaths. Pedestrian access is also available across the Barangaroo site and along the waterfront via fenced routes. Notwithstanding the high degree of pedestrian accessibility in the area, there are generally low levels of pedestrian activity adjacent to the site. On days when the Passenger Terminal is operational, passengers arriving and departing the site use the Sussex Street / Shelley Street intersection to access Wynyard Station. This intersection is controlled by traffic signals and has pedestrian crossing facilities on all three approaches. Pedestrian traffic movements to and from the Passenger Terminal are in the order of 1,700 pedestrian movements in total for each cruise ship visit, with the majority typically occurring between the hours of 11am and 2pm.

Bicycles

A bicycle lane exists along Hickson Road between Circular Quay and Napoleon Street, which is utilised by both commuter and recreational cyclists. Cycling connections to the site are being improved through the construction of separated cycleways along King Street (completed May 2009) and Kent Street (scheduled for completion early 2011). Internally, the site is relatively flat which will encourage pedestrian and cycle movement. However, the site is somewhat constrained by considerable grade differences between the site and other parts of the CBD and Wynyard.

2.6 Physical Characteristics

2.6.1 Topography The ground surface of the entire Project Application Site is at an elevation of approximately 2m (AHD). The surrounding landform to the east of the Project Application Site rises rapidly. A 10m high man-made sandstone cliff is situated to the east of Hickson Road and Sussex Street.

2.6.2 Geology and Geomorphology Investigation reports prepared previously by AECOM and others provide a detailed analysis of the geological and geomorphological characteristics of the Pilot Trial sites and the Barangaroo site generally. The Sydney Geological Map Scale 1:100,000 and the Sydney Geological Map Scale 1:250,000 indicate the Barangaroo site is underlain by Hawkesbury Sandstone. Quaternary sediments and man-made fill overlay the Hawkesbury Sandstone. A Geotechnical Statement prepared by AECOM (refer to Appendix O) for the Declaration Area (within which the Project Application Site is located) indicates that the site is underlain by manmade fill, which is in turn underlain by marine sediment and Hawkesbury Sandstone. The fill material is up to 21m deep and comprises a mix of silt clay, course gravel and fragments of concrete, brick, steel, glass and ash.



2.6.3 Groundwater and Hydrogeology The groundwater profile beneath the Project Application Site is likely to be influenced by the groundwater flow from the east beneath the CBD and tidal fluctuations associated with Sydney Harbour. Data collected in previous investigations indicates that the depth of groundwater ranged between approximately 1.3m and 2.9m below ground level across the Barangaroo site were reported due to the influence of tides within Darling Harbour. Groundwater within the Declaration Area has been found to be contaminated by total petroleum hydrocarbons (TPHs), polycyclic aromatic hydrocarbons (PAHs), toluene, ethylbenzene and xylenes (BTEX), ammonia and cyanide. These contaminants are present in concentrations that exceed the relevant trigger values for the protection of human health and aquatic ecosystems. The measures that will be implemented during the Pilot Trials to ensure that groundwater contaminants are appropriately managed are outlined in Section 6.4.

2.6.4 Site Contamination Investigation reports prepared by AECOM (and others) have revealed that both the soil and groundwater of the Project Application Site is contaminated. The Barangaroo site has an extensive history of commercial and industrial land uses dating back to the early 19th Century, including as a gasworks, ship berthing and associated commerce, and a passenger terminal. From 1840 to 1921, portions of the site were used to manufacture gas, with parts of the former gasworks infrastructure, including a retort house, meter house, gasholders and purifier beds, remaining in place beneath the current slab surface and adjacent part of Hickson Road. The most significant contamination within the Project Application Site is associated with the former gasworks, although some contamination has also been identified relating to the importation of fill materials of unknown origin for land reclamation of the existing wharf areas. The waste tar present in the Hickson Road portion of the Project Application Site is also a result of the previous use of the site as a gasworks plant. The contaminants identified within the gasworks waste include the following substances: TPHs, PAHs, benzene, toluene, BTEX, ammonia, phenol and cyanide. The concentrations of these contaminants variably exceed criteria levels in fill materials, natural soil, bedrock and groundwater within the footprint of the former gasworks. The purpose of this Project Application is to enable Lend Lease to carry out Pilot Trials of SEPR and S-ISCO to determine their effectiveness in addressing the contamination on the Project Application Site which has been identified in the Declaration Area. If S-ISCO and SEPR prove to be effective, and if the EPA approves these remedial technologies, Lend Lease proposes to use these remedial methodologies to remediate contamination in Block 5 and Hickson Road within the Declaration Area, and potentially assessed as a remediation option for adjacent areas. The details and benefits of the treatment are included in Section 4.

Overarching Remedial Action Plan

ERM has prepared an Overarching Remedial Action Plan (RAP) for the Barangaroo site for the Barangaroo Delivery Authority (Appendix G). The Overarching RAP presents a summary of the contamination issues identified on the Barangaroo site and outlines an approach to the remediation of the site as a whole.



The Overarching RAP requires that site specific RAPs be developed for the Declaration Area and for the other development sites. With respect to the Project Application Site, no RAP is required before works are undertaken because the works are intended to test S-ISCO and SEPR, and not to remediate the land. The proposed Pilot Trial constitutes investigation works that are being undertaken specifically as part of trialling and assessment of methodology options for the future remediation of the Barangaroo site and adjacent parts of Hickson Road, and are a pre-cursor to future full scale remediation works. The future remediation works for the site will be detailed in a separate and in a future Remediation Action Plan (RAP) or Remediation Works Plan (RWP), as appropriate, which will subject of a separate project application. At this stage of the remediation planning process, it is not required or necessary within the framework of the Overarching RAP for a RAP or detailed RWP to be prepared for this Project Application. Lend Lease has consulted with the independent Site Auditor, who has confirmed that a RAP is not required for the Pilot Trials. The Pilot Trials are consistent with the framework of the Overarching RAP, and the level of detail within the existing Overarching RAP is sufficient for this stage of the process. A copy of the Overarching RAP is included as an appendix for reference and information.

2.6.5 Vegetation The Project Application Site is largely devoid of vegetation with the exception of a strip of mature Fig Trees along the western side of Hickson Road, which forms the interface with the Barangaroo Site. It is not expected that the Pilot Trial works will impact these trees.

2.6.6 Heritage and Archaeology

Non Indigenous Heritage

Neither the Project Application Site nor any buildings, structures or elements within it, are listed as a local or state heritage item. The approved Concept Plan and subsequent Demolition Project Application comprehensively addressed the heritage significance of the Barangaroo site. The Heritage Impact Statement prepared for the site by City Plan Heritage in 2007 (refer to Demolition Project Application) also confirms the Project Application Site is not of heritage significance and does not exhibit heritage values (including existing buildings and structures).

Non-Indigenous Archaeology

A Non-Indigenous Archaeological Assessment has been prepared by Casey and Lowe for the Pilot Trial sites (Appendix L). The Assessment notes that archaeological resources may be present in the subsurface of the Pilot Trial area. These resources may include timber, metals, sandstone, ceramics, glass, masonry, lime mortar, organics and middens. An assessment of the impact of the proposed works on these archaeological resources is provided in Sections 6.13.

Indigenous Heritage and Archaeology

A search of the Department of Environment, Climate Change and Water’s (DECCW’s) Aboriginal Heritage Information Management System (AHIMS) indicates that no known Aboriginal sites have been previously recorded within or in the vicinity of the Project Application Site or the broader Barangaroo site. Comber Consultants have undertaken an Aboriginal Archaeological and Cultural Heritage Assessment for the Block 5 and Hickson Road Pilot Trial areas (refer to Appendix M). The statement notes that Block 5 does not contain parts of the original shoreline (which may contain archaeological deposits).



Similarly, the Hickson Road Pilot Trial area is within a tar tank, the construction of which would have disturbed any potential Aboriginal sites. Because no Aboriginal objects will be damaged or disturbed during the Pilot Trial, no permit is required from DECCW for the S-ISCO Pilot Trial.

2.7 Surrounding Development The proposed Pilot Trial work areas are temporary. The works within the Block 5 Pilot Trial work area will take place beneath the surface of redevelopment Block 5, however some equipment and structures are required above ground to facilitate the Pilot Trials. The Pilot Trials will be completed as part of Phase 1 VMP. No development of Block 5 will be undertaken at this stage. Any proposed development of Block 5 will be the subject of separate future Project Applications. A description of the existing development and future proposed development envisaged under the approved Concept Plan (as modified) is outlined below. The Hickson Road Pilot Trial work area lies on and beneath the Hickson Road reserve and footpath.

2.7.1 Existing Development

To the North

Immediately to the north of the Block 5 Pilot Trial area lies the remainder of the Barangaroo site. To the north of the Hickson Road Pilot Trial area lie commercial and residential developments.

To the East

Immediately to the east of the Block 5 Pilot Trial area lies the boundary of the Barangaroo site with Hickson Road. To the east of the Hickson Road Pilot Trial area lie developments at numbers 30 and 36 Hickson Road. Number 30 Hickson Road is a multi-storey commercial building with a childcare centre at ground level known as ‘The Bond’, number 36 Hickson Road, is a multi-storey residential building.

To the South

To the south of the Block 5 Pilot Trial area lies SWC SPS 1129 and redevelopment Blocks 3 and 4. Beyond the Barangaroo site lies the KPMG, Macquarie Bank and Amex buildings and the King Street Wharf precinct. To the south of the Hickson Road site lies ‘The Grafton Bond’ and the intersection of Sussex and Napoleon Streets. Existing structures to the south of the Block 5 Pilot Trial area within Barangaroo will be demolished prior to the commencement of the Trial works under existing consent MP07_0077).

To the West

To the west of the site is Sydney Harbour and the waters of Darling Harbour. Further west is Darling Island.



3.0 Stakeholder Engagement Strategy In accordance with the Environmental Assessment Requirements for this Project issued by the Director-General (refer Appendix A), consultation must be undertaken with relevant public authorities, community groups and affected landowners. This section details the consultation undertaken as part of the preparation of this Application and proposed ongoing stakeholder engagement. A strong commitment to an inclusive and pro-active community and stakeholder engagement process underpins this strategy. Lend Lease’s key objective to the ongoing consultation is:

To set the path for carrying out effective and meaningful consultation through an ‘early and often’ approach which incorporates stakeholder feedback into every stage of the project.

It is noted that both Lend Lease (as the project applicant) and the Barangaroo Delivery Authority (as party to the VMP) will work collaboratively in undertaking stakeholder engagement for the proposed Pilot Trials. Lend Lease and the Barangaroo Delivery Authority are committed to ensuring the approach is inclusive, transparent and provides a forum for community feedback. In compliance with the Barangroo Delivery Authority's undertaking under the Voluntary Management Proposal (VMP), the Barangaroo Delivery Authority has prepared a strategy for communicating with relevant stakeholders about the VMP implementation including the actual management works that will be conducted as part of the VMP. The Barangaroo Delivery Authority believes that appropriate, timely and effective communications and consultations with relevant stakeholders are important to the successful implementation of the VMP works. The purpose of the Communications Strategy is to outline the communication plans for communicating and consulting with the relevant stakeholders. Having regard to the communications principles that the Barangaroo Delivery Authority adheres to the Communications Strategy identifies specific communications objectives and outcomes which would guide the communications methods used for the VMP implementation. The communications objectives include ensuring that relevant stakeholders are informed of the VMP, and ensuring that any concerns or submissions made by stakeholders are adequately identified and addressed. Several communications and consultations methods will be used which include letters to stakeholders, Barangaroo newsletter, community information sessions, the Barangaroo Delivery Authority's website updates, media releases, and letter box drops (as appropriate).

3.1 Technical Working Groups The approved Concept Plan Statement of Commitments requires the establishment of Technical Working Groups to prepare a series of Implementation Plans and Strategies for Barangaroo. Nine (9) Technical Working Groups have been established for consultation in the preparation of the various Implementation Plans and Strategies. The membership of all Technical Working Groups are summarised in Table 1.



Table 1 – Technical Working Group Memberships for Implementation Plans/Strategies

Implementation Plan/Strategy Required by Concept Plan

Technical Working Group Name

Membership

Geotechnical and

Environmental Site

Remediation and Remedial

Action Plan

Remediation Barangaroo Delivery Authority

Lend Lease

DECCW

Transport Management

and Access Plan

Transport and Access Barangaroo Delivery Authority

Lend Lease

NSW Transport and Infrastructure

City of Sydney Council

Utility Services

Infrastructure Plan

Physical Infrastructure Barangaroo Delivery Authority

Lend Lease

Sydney Water


DECCW

Design Excellence Strategy Built Form Barangaroo Delivery Authority

Lend Lease


Public Domain Plan Public Domain Barangaroo Delivery Authority

Lend Lease

Sydney Harbour Foreshore Authority

NSW Maritime


Community and Social

Plan

Community Development Barangaroo Delivery Authority

Lend Lease

Department of Housing

City of Sydney

Marketing and Promotion

Strategy

Investment Barangaroo Delivery Authority

Lend Lease

Department of Industry and Investment

Retail Management Plan Investment Barangaroo Delivery Authority

Lend Lease

Department of Industry and Investment

Housing Strategy Community Development Barangaroo Delivery Authority

Lend Lease

Department of Housing

City of Sydney

Since their establishment, the Technical Working Groups have met numerous times and three Implementation Plans/Strategies that are relevant to this Project Application have been prepared in consultation with these Technical Working Groups. Further to this consultation, several of the specialists responsible for the preparation of the technical reports that comprise the appendices to this EAR have engaged in various consultations with relevant stakeholders, including the relevant utility providers.



3.2 Stakeholder Consultation The Barangaroo Delivery Authority and Lend Lease are consulting with local residents and other relevant stakeholders as part of its ongoing community engagement program related to Barangaroo. The opportunity to participate has been provided through a number of direct and indirect mediums:

there has been more than 7 months of consultation on the evolution of the proposed design for Barangaroo South, as well as presentations regarding the Headland Park and consultation on the central precinct that were additional to any statutory planning requirements

more 13,000 people have viewed in person or online the plans for Barangaroo (many recording comments), attended one of the seven community consultation events or participated in the online forum.

the Authority has hosted seven presentations and workshops outlining the plans for Barangaroo and seeking community feedback:

- presentation at the City Recital Hall in Angel Place on 23 February, where both Lord Richard Rogers and Paul Keating spoke about the plans and answered questions from the public.

- series of four information sessions and community workshops held during May. The first was at the Lower Town Hall on 3 May, the second at Parramatta on May 17, the third at Caringbah on May 19 and the fourth at Customs House on 24 May.

- headland Park Design Open Day on July 10

- community forum held at the Sydney Opera House on 1 September.

the Barangaroo Development Authority has held or attended more than 100 meetings, briefings and discussions with a broad cross section of the community representing groups as diverse as the arts, education, housing, tourism, business and sustainability interests.

since March this year, Lend Lease has been involved in more than 20 community information sessions, involving more than 500 members of the community.

on 16 June Lend Lease hosted a briefing about the updated design for Barangaroo South which was attended by community representatives, business groups, government bodies and the media. On the same day Lend Lease also launched its Barangaroo South website as well as its 1300 community information line. To date approximately 9,000 people have visited the Barangaroo South website.

Lend Lease has distributed its Barangaroo South newsletter to over 3,000 residents and information update notifications in the form of letters have also been distributed to over 2,000 local residents.

the Lend Lease Community Relations Team has met with 14 local building managers from commercial properties and businesses to discuss upcoming site works.



Consultation to Date for the S-ISCO Pilot Trials

In conjunction with the Barangaroo Delivery Authority, and in accordance with the Communications Strategy required under Phase 1 VMP, Lend Lease has commenced early consultation about the S-ISCO Pilot Trials with those stakeholders considered to be potentially most impacted by the works. This early consultation has assisted Lend Lease in understanding the needs and concerns of these key community members,and has allowed for issues to be considered in the design and assessment of the Pilot Trials. Lend Lease and the Barangaroo Delivery Authority has consulted with the following stakeholders prior to lodgement of this Project Application:

38 Hickson Road Executive Committee Regular meetings held with Executive Committee to provide updates about the planning and upcoming works and address any key concerns upfront. These meetings were attended by key people from the Lend Lease Barangaroo South Team and Barangaroo Delivery Authority.

Residents and owners of 38 Hickson Road Presentation provided to the residents as nearby owner / occupants. A Q&A session was also held after this presentation.

Millers Point Resident Action Group A meeting was held to discuss general issues including contamination and potential future remediation and Pilot Trials.

Billabond Childcare Centre Ongoing personalised consultation has been carried out with the Childcare centre to provide updates about the nature of the upcoming activities.

30 The Bond Facilities Manager A meeting has been held with the Bond Facilities Manager to open the communication channel and provide updates about the nature of the upcoming activities.

Top Floor Café (36 Hickson Road) A meeting has been held with the owner of this business to outline the upcoming activities and provide contact details of Lend Lease should they have any further queries. Further consultation closer to the start of works will be undertaken.

City of Sydney Council Meetings were held with Lend Lease, City of Sydney Council and the Barangaroo Delivery Authority , to discuss the proposed Pilot Trials, in particular the proposed works on Council land (Hickson Road).

DECCW Regular meetings between Lend Lease, Barangaroo Delivery Authority and DECCW have been held as part of the Technical Working Group. Specific presentations were given to provide information on the proposed Pilot Trials.

Local Authorities (Police / Fire) Consultation undertaken regarding the proposed Pilot Trials and outlining the nature of the works.

Sydney Water Consultation undertaken regarding the Pilot Trials, specifically as they are in close proximity to a Sydney Water asset (Sewer Pumping Station #1129). No issues noted as long as access is maintained during the work.

Sydney Ports Corporation A meeting has been held with Sydney Ports to discuss the proposed Pilot Trials, specifically in the context of the Sydney Ports cruise passenger terminal being located nearby



Ongoing Community Consultation and Notification

Following lodgement of this Project Application, Lend Lease will undertake further detailed consultation and notification to the local community and relevant stakeholders, prior to the commencement of Pilot Trials. A wide range of communication channels will be used to consult with and notify the community and stakeholders about the S-ISCO Pilot Trials. This will ensure that all parties are truly consulted with and informed about the Pilot Trials in a timely manner. Table 2 summarises the communication methods proposed for consulting with, involving and informing stakeholders, community and the public during the S-ISCO Pilot Trials period. A systematic approach will be developed to communicating with stakeholders and the community to ensure the right information is readily available, at the right time and in the right place. This is generally consistent with the communications and stakeholder engagement plan prepared for the Phase 1 VMP. Table 2 – Proposed consultation methods

Method of Consultation Purpose

Community Information

Sessions to discuss with members of the community who are located in

direct proximity to the work what the Pilot Trials involve and the measures that are being taken to reduce the potential impact on the community.

to enable an opportunity for the community to raise any questions or concerns they may have about the Pilot Trials.

these community information sessions will be attended by key people from the Lend Lease Barangaroo Team and Barangaroo Delivery Authority (Barangaroo Delivery Authority) who have an in depth understanding of the S-ISCO Pilot Trials to present to the group about the Pilot Trials and answer any questions.

in addition to this, feedback forms will be provided to further understand the needs and current opinion of the community.

Stakeholder one-on- one

briefings to ensure that commercial stakeholders in close proximity to

the work are consulted with and informed about the Pilot Trials both prior and during the activities.

the Community Relations team will personally meet with these commercial properties to address any concerns they may have about the work and understand requirements of these groups during the S-ISCO Pilot Trials..

Door- knocking to personally discuss concerns raised by the local business community (particularly the businesses along King Street Wharf and cafes in the high rise commercial buildings) face-to-face on a one-on-one basis, proactively address any issues and provide assurances about the work.

Signage to inform the community about who is responsible for the remediation activities and the contact details for further information about the work

1300 Community Enquiry

Line a key channel for the community to raise issues, ask questions

and speak directly to a member of the Community Relations team. An afterhours service will also be provided to ensure any issues occurring outside of business hours are addressed in a timely manner.

Barangaroo Website information about the application will be available on the Barangaroo.com website.

Barangaroo South Blog an opportunity for open communication between the community, stakeholders and general public about the project, including the S-ISCO Pilot Trials.

this will be moderated by the Lend Lease team to ensure no explicit language is posted.



Method of Consultation Purpose

Barangaroo South Website the central portal to all information about the project. it is the one-stop-shop for everything the community and

stakeholders will need to know about the development, including the S-ISCO Pilot Trials. It will also contain electronic copies of all newsletters, notifications, press releases and links to the Department of Planning website and submissions.

The website will also contain the contacts details of the Lend Lease Barangaroo South Community Relations team should they have any comments or require further information about

the Pilot Trials. Barangaroo Delivery

Authority Community

Update

this newsletter will provide the community with clear information on the Project Application and impacts

Fact Sheet a fact sheet outlining information about the S-ISCO Pilot Trials and impacts.

Community Newsletter

to provide key information about the S-ISCO Pilot Trials and

wider project to those community members and stakeholders in reasonable proximity to the work or who have expressed interest in being updated about Barangaroo South.

the community newsletter will also encourage the community to contact the Lend Lease Barangaroo South Community Relations team should they require any further information or would like to provide feedback about the work.

Community Notifications to ensure all community members and stakeholders in close proximity to the work are informed about the S-ISCO Pilot Trials prior to the work commencing and provided updates when appropriate about the work.

issued to the neighbouring community and stakeholders to provide formal notification about the commencement of the S-ISCO Pilot Trials. This notification will include details about the nature and location of the Pilot Trials, the hours of work and the contact details of the Community Relations team should they require any further information about the work.

Commercial Property

Notice Boards When appropriate, general information about the Pilot Trials

and overall project will be included on the notice boards in commercial properties.

This will also contain the contacts details of the Lend Lease Barangaroo South Community Relations team should they require any further information about the work.

3.3 Council and Agency Consultation Lend Lease recognises the importance of positive relationships with Council and agencies and seeks to proactively engage with them over the duration of the Pilot Trials. Lend Lease proposes to undertake stakeholder engagement to ensure all individuals and/or groups that have an interest in, or are affected by, the Project Application are consulted with.

Ongoing Agency Consultation

Following lodgement of this Project Application, Lend Lease will undertake further detailed consultation with the relevant agencies, prior to the commencement of, and during, the Pilot Trials.

City of Sydney Council Extensive consultation and notification will be undertaken with the City of Sydney Council prior to commencement and during the Pilot Trials particularly in relation to works proposed to be undertaken on Council land (Hickson Road and the footpath area).



Department of Environment, Climate Change and Water (DECCW) Ongoing consultation will be undertaken with DECCW prior to and during the Pilot Trials, in accordance with the Phase 1 VMP and provision of environmental monitoring reports.

Other Consultation will be undertaken with other agencies as required (eg. Sydney Ports) to consider issues and provide notification in a timely manner.



4.0 Proposed Project A summary of the proposed remedial technologies to be trialled during the Pilot Trial works is described below. A detailed description of the proposed Pilot Trials for the proposed remediation technologies is described in the Work Plan prepared by VeruTek Technologies and included at Appendix B. The proposed Pilot Trials will trial two in-situ remediation methods, that is, S-ISCO and SEPR to verify their effectiveness in addressing the contamination in the soil and groundwater on parts of Block 5 and Hickson Road within the Declaration Area. The results of the Pilot Trials would also be used to refine the design of the full-scale SISCO and SEPR remediation technologies (if they are proven to be effective and if they are approved by the EPA as the appropriate remedial technologies for the Declaration Area) to address contamination on parts of the Declaration Area or other areas of Barangaroo to be detailed in future RAPs. This Project Application only relates to the SISCO and SEPR Pilot Trials. Any future full-scale implementation of S-ISCO and SEPR will be subject of a separate application. The S-ISCO chemical treatment technology will be trialled on contaminants present in the soil and groundwater in a section of Block 5. A two-phase technology involving SISCO/ SEPR chemical techniques will be trialled on contaminants present in an existing sub-surface tar tank below Hickson Road. No permanent works are proposed as part of the Pilot Trials, and any full-scale remediation using these techniques will be the subject of a separate future Project Application. The S-ISCO technology to be trialled at the Block 5 site involves the injection of specially formulated chemical doses into the soil and groundwater. The two phase SEPR / S-ISCO technology to be trialled at the Hickson Road site consists of an initial SEPR phase which comprises injections and subsequent extractions from the confined tar tank, aimed at removing bulk tar contamination. Extracted liquids will be stored, characterised and disposed of appropriately as per the Work Plan. This will then be followed by the S-ISCO phase, which will ‘polish’ the soil by injecting specially formulated chemicals into the contamination inside the tar tank structure. This two phase process will (subject to successful trialling) reduce or eliminate contamination. Programs of extensive monitoring of potential or actual impacts to human health and to the environment will be implemented prior to, during and after completion of the Pilot Trials. Specifically, the Pilot Trials will:

demonstrate the effectiveness of the technologies within the specific site conditions of Barangaroo

provide necessary and sufficient information to design and optimise full scale implementation (subject to successful trialling and approval by the EPA) of S-ISCO and SEPR. The information to be obtained includes:

- Chemical doses,

- Chemical formulation,

- Injection procedures,

- Injection flow rates,

- Well spacing, and

- Monitoring type and frequency.



evaluate the distribution of the injected co-solvent/surfactant-enhanced activated oxidant in the subsurface;

evaluate the effectiveness of SEPR in the removal of tar from the soil and as a pre treatment for S-ISCO in that area;

evaluate the effectiveness of S-ISCO in the destruction of contaminants of concern (COC) in the soil;

evaluate the effectiveness of S-ISCO in reducing COC concentrations in groundwater migrating from the future site areas to be treated;

evaluate the potential for un-reacted S-SICO and / or SEPR chemical migration towards Darling Harbour and the basement of 38 Hickson Road;

in the event of un-reacted S-SICO and / or SEPR chemical migration toward either Darling Harbour or the basement of 38 Hickson Road, evaluate the performance of mitigation measures to prevent or minimise such migration;

evaluate the potential for volatile emissions to result from injections; and

evaluate the potential for volatile emissions to impact the basement of 38 Hickson Road.

The Pilot Trials at the Block 5 and Hickson Road sites comprise the following common elements:

establishment of injection, extraction soil vapour extraction (SVE) and monitoring wells;

pre-injection baseline monitoring;

delivery of individual chemical stream to injection wells. The injection system will operate with a continuous injection schedule of 10-12 hours each day, 6 days per week; and

performance process and validation monitoring and review of groundwater, soils and soil gas samples.

The Pilot Trial for Block 5 comprises the following elements:

establishment of treatment staging area including injection system. This will occupy an area of approximately 100m2 (10m x 10m in size) along the eastern portion of Block 5 adjacent to Hickson Road as illustrated in Figure 6;

installation of bunded chemical storage area including a shipping container to be used for storage of chemicals; and

temporary on-site laboratory and field analysis to determine effectiveness of the Pilot Trial.



Figure 6 - Site Plan of Block 5 Pilot Trial area (Source: VeruTek)

The Pilot Trial for Hickson Road comprises the following elements:

establishment of a trench across Hickson Road to a depth of 0.25m to contain injection lines, and installation of steel plates approved for heavy traffic. The trench will be graded towards the injection wells, so that in the event of a leaking pipe, liquids can be collected in the vault boxes of injection wells within the barricaded / fenced Pilot Trial Area;

establishment of injection, extraction and monitoring wells that will connect to the treatment staging area and extraction pumps in the Block 5 area as illustrated in Figure 7;

the erection of a wire fence and concrete barricade around the injection and monitoring wells to prevent public access and protect from traffic; and

performance monitoring and review of groundwater, soil and soil gas samples.

Figure 7 - Site Plan of Hickson Road Trial Area (Source: VeruTek)



All chemicals will be stored in the Block 5 area which is located within the cyclone wire fence that surrounds the Barangaroo site. All tanks and injection system equipment will be secured and locked to prevent public access and to avoid vandalism.

Staging

The Pilot Trial will be staged as outlined below.

mobilisation and set up including (Block 5 and Hickson Road)

- drilling and installation of groundwater monitoring and injection wells

- drilling and installation of soil vapour points and set up of a soil vapour extraction system

- excavation of a shallow trench from west to east across Hickson Road and within the Hickson Road footpath to allow installation of injection / extraction lines which will run between the injection system compound, located within Block 5, and the Hickson Road injection system

- pre-injection baseline monitoring

injection and extraction phase (Hickson Road)

- injection of chemicals and extraction of waste products

- during the injection and extraction, the groundwater levels within and outside the tar tank will be monitored in the groundwater monitoring wells

- during the works, the soil vapour extraction system will be used to extract and treat vapour from unsaturated soils above the surrounding tar tank

injection phase (Block 5)

- injection of chemicals.

- during the injection, groundwater samples from within and around the injection zone will be collected and analysed to monitor the progress of the reaction

- during the works, the soil vapour extraction system will be used to extract and treat vapour from unsaturated soils above the injection zone.

post injection performance monitoring (Block 5 and Hickson Road), which will include monitoring and sampling the groundwater monitoring wells within and surrounding the tar tank.

demobilisation (Block 5 and Hickson Road) which will include reinstatement of the trench across Hickson Road.

The site establishment and set-up phase will take approximately 2 weeks (pending conditions imposed by the City of Sydney), the injection phases approximately 8 weeks and post-injection performance monitoring will occur for a period of about 6 weeks. The proposed operating hours are outlined in Table 3 below. It is noted that the injection and system operation phase may occasionally be required to occur later than 6:00pm in order to meet target injection programming. This work would be limited to running the injection system or analysing of samples in the on-site lab and so would have minimal impact on adjoining land occupiers. No work will be undertaken on Sundays or public holidays. The Pilot Trials will take between approximately four to six months to complete. Following completion of the Pilot Trials, the success of the remediation will be validated.



Table 3 – Operating hours

Stage Proposed Hours / Days of Operation

Approximate Duration

Drilling / trenching and system setup

7:00am -6:00pm Mon-Fri; 8:00am-1:00pm Sat

2 weeks

Injection and system operation 7:00am -6:00pm (or later) Mon-Sat 8 weeks

Post-injection monitoring 7:00am -6:00pm Mon-Fri; 8:00am-1:00pm Sat

6 weeks

An example of a S-ISCO facility and staging area, generally similar to the facility that will be located on Block 5, is illustrated at Figure 8.

Figure 8 - Example of a full scale S-ISCO® treatment facility



5.0 Director General’s Environmental Assessment Requirements

The project was declared a Major Project on 22 June 2010. Director General’s Environmental Assessment Requirements were formulated on the 12 July 2010(DGRs). Table 4 provides a summary of the individual matters listed in the DGRs and identifies where each of these requirements have been addressed in this report and the accompanying technical studies.

Table 4 - Director General’s Environmental Assessment Requirements

Director General’s requirements Location in Report / Application

1 Relevant EPIs, Policies and Guidelines Section 6.1

2 Concept Plan Section 6.2

3 Traffic Management and Accessibility Impacts Section 6.3

4 Remediation Action Plan Section 6.6

5 Soil and Water Section 6.4

6 Waste Management Section 6.5

7 Air, Noise and Odour Impacts Section 6.7 and Section 6.8

8 Health Impacts Section 6.9

9 Environmental, Construction and Site Management Plan

Section 6.11

10 Temporary Structures Section 4.0

11 Consultation Section 3.0

As noted at Section 2.6.4, this Project Application is accompanied by the Overarching RAP for the Barangaroo site prepared by ERM (Appendix G). The Overarching RAP presents a summary of the contamination issues identified on the Barangaroo site and outlines an approach to the remediation of the site as a whole. Whilst the Overarching RAP requires that site specific RAPs be developed for the DECCW Declared Area and for the other development sites, no separate RAP is required in relation to the remediation works proposed by this application because the works constitute investigation works that are being undertaken specifically as part of trialling and assessment of methodology options, and are a pre-cursor to future full scale remediation works. At this stage of the remediation planning process, it is not appropriate or necessary within the framework of the Overarching RAP to prepare a further separate detailed RAP or detailed Remediation Works Plan. Lend Lease has consulted with the independent Site Auditor, who has confirmed that although remediation will result, a RAP is not appropriate for a Pilot Trial. The Pilot Trial will test the remediation methodologies and provide data that will be used for preparation of a detailed RAP for future remediation works.



6.0 Environmental Assessment This section of the report assesses and responds to the environmental impacts of the proposal. It addresses the matters for consideration set out in the Director-General’s Environmental Assessment Requirements (DGRs). The draft Statement of Commitments complements the findings of this section.

6.1 Relevant EPIs, Policies and Guidelines

6.1.1 Statutory Framework The permissibility, consent role arrangements and planning approvals pathway are set out in the Major Development SEPP, Sydney City LEP 2005, State Environmental Planning Policy No. 55 – Remediation of Land (SEPP 55) and the EP&A Act as outlined below.

Zoning and Permissibility

The land included within the S-ISCO Pilot Trial area is currently zoned as follows:

land within Barangaroo Block 5 - B4 Mixed Use under Part 12 of Schedule 3 of the Major Development SEPP; and

land within Hickson Road reservation - Maritime and Transport under the Sydney Local Environmental Plan, 2005 (Sydney LEP 2005).

The zoning maps from the Major Development SEPP and Sydney LEP are shown at Figure 9 and Figure 10 respectively. As described above the Pilot Trials will remediate soil and groundwater contamination within a nominated test area. The objective of the Pilot Trial is to assess the effectiveness of the in situ S-ISCO and SEPR technologies to treat contaminants present in the soil and groundwater in parts of Block 5 and Hickson Road which are within the Declaration Area. The proposed works involve the injection of specially formulated chemical doses into the soil and groundwater to degrade or remove contamination. A license will likely be required from the NSW Environmental Protection Authority to allow the introduction of chemicals into the groundwater. A RAP is not required because the works are intended to test a remediation methodology and not to remediate the land. The proposed Pilot Trials constitute investigation works that are being undertaken specifically as part of trialling and assessment of methodology options for the future remediation of the Barangaroo site and adjacent parts of Hickson Road, and are a pre-cursor to future full scale remediation works. Nonetheless, because the investigation works will result in destruction of some or all of the contaminants within the treatment areas, the proposed Pilot Trials are categorised as “remediation work” within the meaning of clause 4 of State Environmental Planning Policy No 55 – Remediation of Land (SEPP 55) remediation as follows:

“(a) removing, dispersing, destroying, reducing, mitigating or containing the contamination of any land, or

(b) eliminating or reducing any hazard arising from the contamination of any land (including by preventing the entry of persons or animals on the land).”

Remediation works are permissible with consent in the B4 Mixed Use Zone under the Major Development SEPP.



Remediation works are not specifically identified as permissible with consent in the Maritime and Transport Zone under the Sydney LEP 2005. However, pursuant to Clause 8(1) of SEPP 55 “A person may carry out a remediation work in accordance with this Policy, despite any provision to the contrary in an environmental planning instrument”. The provisions of SEPP 55 prevail over SLEP 2005 to the extent of any inconsistency. The proposed Pilot Trial works are therefore permissible with consent under the existing environmental planning instruments applying to the land.

Figure 9 - Barangaroo Zoning Map (Source: Major Development SEPP)



Figure 10 - Hickson Road Zoning Map (Source: Sydney LEP)

State Environmental Planning Policy No. 55 – Remediation of Land

The land included in the S-ISCO and SEPR Pilot Trial areas is within a Remediation Site as defined under SEPP 55. SEPP 55 defines “remediation site” as:

(a) land declared to be a remediation site by a declaration in force under Division 3 of Part 3 of the Contaminated Land Management Act 1997, or

(b) premises:

(i) in respect of which there is in force a notice under section 35 of the Environmentally Hazardous Chemicals Act 1985 requiring prescribed remedial action to be taken, or

(ii) that are the subject of prescribed remedial action (whether being undertaken by the Environment Protection Authority or by another public authority at the direction of that Authority) under section 36 of that Act.



The land was declared a remediation site under the Contaminated Land Management Act 1997 by the Environment Protection Authority in May 2009 and so falls within this definition.

Category 1 Remediation Works

Clause 9(d) of SEPP 55 provides that “development for which another State environmental planning policy or a regional environmental plan requires development consent” is a Category 1 remediation work. The S-ISCO and SEPR Pilot Trial works within part of Block 5 and Hickson Road within the Declaration Area are ‘Category 1 remediation works’ within the meaning of SEPP 55 because the works are development for which the Major Development SEPP requires development consent. The Major Development SEPP is the established planning framework for the Barangaroo site. Clause 5(1) of Part 12 of Schedule 3 of the SEPP provides that development within the Barangaroo site that has a capital investment value of more than $5 million is a Part 3A project. Conversely, clause 1(3) of Part 1 of Schedule 6 provides that development with a capital investment value of less than $5 million is subject to Part 4 of the EP&A Act. There are no provisions within Schedule 3 or Schedule 6 that enable the S-ISCO and SEPR Pilot Trials to be carried out as exempt development or development without consent. Accordingly, pursuant to the Major Development SEPP, any development (including remediation works) requires consent under either Part 3A or Part 4, irrespective of the capital investment value. Clause 8(2) of SEPP 55 provides that Category 1 remediation works require development consent.

Approvals Regime and Consent Authority

Clause 6 of the Major Development SEPP provides that development that in the opinion of the Minister is development of a kind referred to in Schedule 1 (Classes of development) or Schedule 3 (State Significant Sites) is declared to be a project to which Part 3A of the EP&A Act applies. Clause 28 of Schedule 1 in the Major Development SEPP, entitled “Remediation of contaminated land” identifies development for the purpose of remediation of land that is Category 1 remediation work on a remediation site as a Part 3A Major Project. The S-ISCO and SEPR Pilot Trials satisfy clause 28 of Schedule 1 of the Major Development SEPP as:

the Pilot Trials are categorised as remediation works as defined by clause 4 of SEPP 55;

the remediation works are categorised as Category 1 remediation works as development consent is required by Schedule 3 and / or Schedule 6 of the Major Development SEPP (refer above);

the portion of Block 5 and Hickson Road, on which the S-ISCO and SEPR Pilot Trials will take place, are within the Declaration Area; and

the Declaration Area is a ‘remediation site’ within the meaning of the Major Development SEPP.

Accordingly, under clause 28 of Schedule 1 of the Major Development SEPP, the works proposed by this application are subject to assessment and determination under Part 3A of the EP&A Act.



On 22 June 2010, Lend Lease was advised that the Department of Planning’s Director, Government Land and Social Projects, as the Director-General’s Delegate had formed the opinion pursuant to Schedule 1, Clause 28 of the Major Development SEPP, that the SISCO Pilot Trials are categorised as remediation works which are to be undertaken on a remediation site and therefore Part 3A of the Environmental Planning and Assessment Act, 1979 applies. Section 75B(3) of the EP& A Act states that if only part of any development is a project to which Part 3A applies, the other parts of the development are taken to also be a Part 3A Major Project. Section 75B(3) also provides that any such development is to be dealt with as a single project. Therefore the remediation works at Hickson Road within the Declaration Area form part of the S-ISCO and SEPR Pilot Trial and hence are also subject to Part 3A.

State Environmental Planning Policy No. 33 – Hazardous and Offensive Development

SEPP 33 applies to all development that is categorised as being a “potentially hazardous industry” or a “potentially offensive industry” (as defined by SEPP 33). In such circumstances, SEPP 33 requires the preparation of a preliminary hazard assessment and identifies the particular matters for consideration that must be addressed. The Department Of Planning’s “Applying SEPP 33 Guidelines” also set out that a risk screening process which should to be used to determine whether a proposed development is potentially hazardous. As this project application involves the controlled on-site storage of some chemicals, and in order to form a concluded view as to whether or not SEPP 33 does actually apply in this case, AECOM has prepared a SEPP 33 Assessment (Appendix U) to determine whether chemicals will be stored in quantities that would require the preparation of a Preliminary Hazard Analysis. The report notes that only three Dangerous Goods associated with the S-ISCO Pilot Trial will be stored on site. These include:

Hydrogen Peroxide – Class 5.1 PGIII;

Sodium Persulphate – Class 5.1 PGIII; and

Sodium Hydroxide – Class 8 PGII.

Hydrogen peroxide and sodium persulphate are Oxidising Agents, with 5 tonnes (5,000kg) being the maximum amount of these chemicals that can be stored on site. Sodium Hydroxide is a corrosive substance Class 8 PGII. The maximum permissible threshold for this chemical is 25 tonnes.

The report notes that the total quantity of Hydrogen Peroxide to be stored on site is 2,280kg, well below the threshold limit under SEPP 33. Similarly, the total maximum quantity of Sodium Persulphate on site will be 2.5 tonnes, which is also significantly below the threshold limit. As both Hydrogen Peroxide and Sodium Persulphate are Class 5.1 oxidising agents, the cumulative quantity also requires review. The total quantity of Class 5.1 to be stored on the site is 2.28 tonnes (hydrogen peroxide) and 2.5 tonnes (Sodium Persulphate) resulting in a total of 4.78 tonnes of Class 5.1 Dangerous Goods. This is below the threshold limit and therefore SEPP33 does not apply to the S-ISCO Pilot Trials.



In relation to Sodium Hydroxide, the maximum permissible quantity of Class 8 materials is 25 tonnes. Approximately 1.2 tonnes of this material will be stored on site, which is again below the SEPP33 limit. In addition to the storage thresholds discussed above, SEPP33 is also concerned with the potential for excessive road transport of Dangerous Goods. Over the course of the Pilot Trial, a total of 40 tonnes of Class 5.1 Dangerous Goods will be transported to the site. This will occur over a 60 day period, equating to approximately 5 deliveries per week. In addition, there is a requirement to transport 12 bulk bags over an eight week period, totaling approximately 1.5 truck deliveries per week. In total, there would be 6.5 deliveries per week, which is well within the requirements for Class 5.1 goods, which state that deliveries must not exceed 30 per week with each load not permitted to exceed 2 tonnes.

6.2 Consistency with the Barangaroo Concept Plan

The Project Application seeks approval for the Pilot Trialling of two in- situ remediation technologies comprising S-ISCO and SEPR, as options to remediate (subject to successful trialling) contaminants known to be present in the soil and groundwater within part of the Barangaroo site and on the adjoining Hickson Road within the NSW DECCW Remediation Site Declaration 21122 (and potentially adjoining areas). The detailed procedure for remediating the site will be assessed in future Project Applications. The Pilot Trials are intended to demonstrate a suitable remediation technology option to remediate (subject to successful trialling) relevant parts of the Declaration Area or Barangaroo site.

6.3 Traffic Management and Accessibility A Construction Traffic Management Plan (CTMP) has been prepared by AECOM (refer to Appendix H). The CTMP addresses the estimated vehicular movements associated with the Pilot Trial, the proposed access arrangements, and discusses the impact (including cumulative impacts) of the operations of the Cruise Passenger Terminal on traffic and pedestrian movements on Hickson Road and Block 5. The Block 5 Pilot Trial site will be established off-street, and as a result, will have limited traffic impact. Deliveries of equipment and chemicals required for the implementation phase represents the majority of traffic associated with the Pilot Trial, and will generate less than 10 trucks movements per day. The flow of traffic will be highest during the two-week set-up and mobilisation period. The Hickson Road works involve the drilling of injection, monitoring and soil vapour extraction wells adjacent to the eastern kerbside of Hickson Road which may take up to two weeks to establish. Trenching across Hickson Road will be undertaken in two stages, with the excavated area covered by temporary steel road/trench plates to maintain the trafficable lanes operational during the period of the Pilot Trial. In order to complete the trenching and installation of the Pilot Trial delivery and extraction lines into the Block 5 Pilot Trial worksite, the short term closure of the western footpath of Hickson Road, and the diversion of pedestrians past the worksite will be required. The injection / monitoring wells in the Hickson Road Pilot Trial area will be barricaded to protect workers against traffic on Hickson Road and retain safe access for pedestrians along the footpath. The impact of the works on the 15 minute parking spaces outside of the childcare centre will be minimised as far as possible.



Staging of Traffic Management Works

The Hickson Road works will be staged in the following sequence to minimise traffic impacts. Diagrams located at Appendix B of the CTMP demonstrate the elements and impacts of each stage.

Stage 1 involves trenching across Hickson Road. This will require the temporary closure of a section of the northbound parking lane (approximately 23 spaces subject to detailed design). This will not affect traffic flows on Hickson Road, with one northbound lane and one southbound lane still able to operate. Prior to the trenching of the roadway, the western footpath will be closed for a short period of time, with pedestrians diverted around the work site. The existing north and south bound bicycle lanes will also be closed temporarily, requiring cyclists to merge into the traffic lane. In addition to the closure of the parking lane during the construction of the trench, nine (approximately 9 subject to detailed design) parallel parking spaces will be removed from the eastern kerbside for the duration of the Stage 1 and Stage 2 works, as well as the 39 spaces (approximate and subject to detailed design) on the western side of Hickson Road.

Stage 2 trenching will be completed and the northbound parking lane (approximately 23 spaces subject to detailed design) will be reopened. All remaining affected parking spaces will remain closed for the period of the Pilot Trial.

Stage 2A involves drilling of boreholes for the installation of the injection, monitoring and soil vapour monitoring wells within the eastern footpath, requiring the short term closure of this footpath and the diversion of pedestrians around the work zone. The injection and operation stages will require 20 parking spaces (approximate and subject to detailed design) to be closed on the western side of Hickson Road (i.e. 19 spaces would be re-opened subject to detailed design), with between six (6) and nine (9) spaces remaining closed on the eastern site of Hickson Road.

Stage 3 the operational phase will commence once the drilling phase is completed. This phase will include well injection and monitoring, with staff collecting samples and monitoring the system. Staff will access the worksites on foot, and would be protected from traffic by concrete barriers, hoarding and fencing.

Stage 1 works will be carried out during low traffic periods, and the trench will be covered with steel plates progressively so as to prevent a safety hazard, and to ensure that there is minimal disruption to traffic movements. During the work, reflective cones, barriers and road signs will be used to cordon off the area to ensure that there is adequate space for construction activities, whilst minimising the area of road affected.

As noted previously, the majority of truck and traffic movements associated with the development will occur during the two week set up phase. Once the drilling phase is completed and the wells are established, there is unlikely to be a need for vehicular access to the Hickson Road Pilot Trial area, with all chemicals being delivered to the Block 5 site. All traffic movements on Hickson Road to access either the Block 5 compound or the Hickson Road site would be associated with site sampling (i.e. one to two vehicles) varying from one to three visits per week. During the monitoring and sampling phase, staff will park in the Block 5 site, with no worker’s vehicles proposed to be parked on-street. Limited off-street parking will also be available in Block 5 during the site establishment phase to accommodation site staff vehicles.



Traffic Generation

The CTMP assesses the impact of the additional construction traffic on the surrounding road network, taking into consideration the proposed Pilot Trial works as well as the vehicular movements associated with other concurrent works on the Barangaroo site (basement and bulk excavation works covered under MP 10 -0023) and traffic generated by adjoining land uses. The results indicate that the surrounding intersections would operate to an acceptable level of service during both the AM and PM peak.

Construction and Pedestrian Traffic Management

The impact of the proposed works primarily relate to:

maintaining peak hour traffic capabilities on Hickson Road. This will be mitigated by staging construction so that two way traffic movements on Hickson Road are maintained to accommodate peak hour traffic volumes;

providing traffic controls that are capable of minimising, or avoiding disruptions, during the times of peak pedestrian and traffic movements associated with the Cruise Passenger Terminal;

accommodating concurrent construction activities on the Barangaroo south site;

short term (one day duration) closure of the western footpath for trenching, requiring the diversion of the pedestrian path around the work zone and the short term (one or two day duration per borehole) closure of the eastern footpath for drilling, requiring the diversion of pedestrians around the work site; and

loss of on-street angle parking and parallel meter parking at various stages of the process.

The Temporary Cruise Passenger Terminal generates additional pedestrian and vehicular traffic on Hickson Road. The ships typically arrive early in the morning and depart in the late afternoon, generating an additional 2,300 to 3,000 vehicular movements over a 10 hour day from 6:30am to 4:30pm and 1,700 pedestrian traffic movements between 11am and 2pm. The forthcoming ship arrival dates have been determined, and measures will be put in place to avoid peak times for cruise ship activity coinciding with worksite activities. The report concludes that the construction activities have the potential to disrupt existing pedestrian, cycle and traffic in the surrounding area due to the initial drilling works, kerbside parking lane closures and traffic diversions on Hickson Road. However, once the Pilot Trial worksite areas are established, very low vehicular movements arising from the Pilot Trial are anticipated. The project will be undertaken in accordance with Appendix H and accordingly the above recommendations are reflected in the draft Statement of Commitments.

6.4 Soil and Water Impact Assessment A Soil and Water Impact Assessment has been prepared by AECOM (Appendix P) to address the DGRs relating to the potential impacts of the Pilot Trials on the local surface and groundwater systems. The report outlines the hydrological condition on site, noting that surface water run-off generally drains into stormwater pits and flows via sub-surface drains to Darling Harbour.



Results of recent studies prepared by AECOM indicate that groundwater occurs beneath the DECCW Declaration Area within the fill and natural material. Groundwater was encountered at depth from approximately 1.38m – 2.92m below ground surface and was subject to tidal fluctuation, extending as far east as Hickson Road, however tidal fluctuations decreased towards Hickson Road. The report notes that contamination on Block 5 has been reported in the fill material, natural soil, bedrock and groundwater that underlie Block 5. Tar and other residual contamination have been detected in Hickson Road and are likely to be a significant source of groundwater contamination migrating from Hickson Road. This source material is largely derived from the former gas works structures, including the former tar tank, the portion of the main gasholder that extends into Hickson Road, and the former small gasholder located within Hickson Road.

Water Quality of Sydney Harbour

The report assesses the potential impact of the proposed Pilot Trials on the water quality of Sydney Harbour, with a particular focus on the impacts of:

overflows, spills or leaks from chemical storage containers, conduit, injection and extraction well that may contaminate stormwater and / or stormwater collection areas;

stormwater run-off coming into contact with contaminated materials as it flows to stormwater inlets and the harbour;

stormwater run-off coming into contact with temporary excavated soils and demolition rubble spoil stockpiles and increase turbidity;

displacements of contaminants which may then interact with the surrounding environment; and

S-ISCO and SEPR chemistry within the groundwater entering into the Harbour.

It is not anticipated that activities associated with the S-ISCO or SEPR Pilot Trials will cause significant impact on surface and groundwater hydrology and water quality. The groundwater is currently contaminated, and the Pilot Trial proposes to improve existing groundwater quality within the Pilot Trial sites. Similarly, it is anticipated that the Pilot Trial activities will generate minimal surface water flow and sedimentation. The Soil and Water Impact Assessment, together with the AECOM Waste Management Plan (Appendix P) outlines the measures that will be put in place to mitigate against any potential surface or groundwater contamination (identified above). Collectively, the management and mitigation measures include, but are not limited to:

preparation of a Spill Management Plan to mitigate any risks associated with solid and liquid spills;

development of engineering strategies for spill prevention and control;

training programs to prevent and control spills and leaks;

administrative strategies to prevent and control spills and leaks;

implementation of shut down procedures in the event of an injection line release under Hickson Road;

implementation of shut down procedures in the event of hazardous substances being released from injection line and injection well head;

use of bicarbonate powder to neutralise sodium persulphate release; and

reporting of any releases.



The report concludes that the Pilot Trials will not result in a significant change (either negative or positive) in the level of contamination, treated or otherwise, entering Darling Harbour.

Stormwater Management

The Soil and Water Impact Assessment provides a summary of the measures proposed under the Construction Management Plan to mitigate against any risks associated with erosion and sedimentation during the Pilot Trials. The report notes, that due to the relatively small footprint of the Pilot Trials, the flat topography of the site and the number of pre-existing stormwater drains through the area, the quantity of stormwater will be minimised. Stormwater entering the site of the Pilot Trial will also be minimised by directing surface water away from excavated areas, depressions, pits and stockpiles where it could come into contact with spoil or contaminated material through the use of berms and diversion drains. Stormwater control devices will be installed to minimise sediments entering Darling Harbour, and will be inspected daily (more frequently during storm events) to monitor their effectiveness. In addition, during the set-up phase, a bunded secondary containment area will be constructed in Block 5 to house chemical storage tanks and drums, as well as drums containing SEPR extraction fluid. Stormwater collected in this area will be tested and drained, at a minimum on a weekly basis. Before any water is discharged to stormwater drains, sewers or other outlets, the relevant approvals or licenses will be sought from the appropriate authorities. Water that fails to meet the criteria will be pumped into waste storage containers for off-site disposal. The report notes that no contaminated or treated water will be discharged into Sydney Harbour or any sewers without being compliant with the Protection of the Environment Operations Act 1997, any future Sydney Water Corporation’s Trade Waste Agreement and / or the City of Sydney Council’s water quality requirements for disposal of water and stormwater. All contaminated or treated water will be containerised and stored on site within a secondary containment area and disposed of as described previously. The report concludes that the potential for adverse impacts on the local surface and groundwater systems is low, and that where potential impacts may arise, they will be managed through a series of mitigation and monitoring systems. The project will be undertaken in accordance with Appendix P and accordingly the above recommendations are reflected in the draft Statement of Commitments.

6.5 Geotechnical Assessment A Geotechnical Statement has been prepared by AECOM (Appendix O) to assess the potential risks to Hickson Road and the adjacent footpath and buildings as a result of the geotechnical impacts of the proposed Pilot Trials within the former tar tank beneath the Hickson Road pavement. The report notes that the site is underlain by fill materials overlying Hawkesbury Sandstone bedrock, with borehole investigations indicating that the tar tank backfill material generally comprises loose to medium dense sandy gravel and gravelly sand. The majority of the fill appears to be contaminated with slag and tar, with the tar contamination appearing to increase with depth. This material is overlain by gravelly sand or sandstone, which is in turn overlain by a concrete pavement and asphalt. Groundwater in Hickson Road has been observed at depths ranging from approximately 1.2 to 3.1 m below ground surface. The groundwater levels vary as a result of tidal fluctuations, the nature and distribution of fill materials and the presence of subsurface structures (particularly within the reclaimed area west of



the Pilot Trial). Groundwater level changes resulting from tidal changes decrease with distance from the Harbour and are less significant in Hickson Road. The former tar tank has been back filled with granular materials consisting of sand to sandy gravels, and can therefore be assumed to be free draining. Also, as groundwater levels will be monitored and actively controlled during treatment, it is unlikely that excess pore pressures will build up in the tank. Whilst soil vapour that may be generated by the Pilot Trials could migrate to the underside of concrete road pavement, any soil vapour that may accumulate below the pavement will be removed by a soil vapour extraction system located within the tank. In relation to the trench across Hickson Road, the report concludes that boreholes indicate the pavement is typically a concrete pavement and can be constructed in accordance with the City of Sydney’s requirements for excavating and backfilling conduit trenches. The report concludes that provided piezometric pressures do not rise above the underside of the concrete pavement, the Pilot Trial is unlikely to have any impact on the pavement or surrounding structures. Similarly, due to the limited depth of the tank, settlements of foundations and pavements in the vicinity of the tank due to an increase in effective stress in the gravel fill as a result of lowering of the water table within the tank are considered improbable. As a result, there are not expected to be any negative impact on Hickson Road as a result of the Pilot Trials.

6.6 Remediation of Contaminated Material As noted in Section 2.6.4, no RAP is required for the Pilot Trials. The Pilot Trials are investigation works to trial and assess methodology options for the future potential remediation of the Barangaroo site. Lend Lease has consulted with the independent Site Auditor, who has confirmed that a RAP is not appropriate for a pilot trial. The Overarching RAP for Barangaroo prepared by ERM (Appendix G) has been provided for reference and information. The Overarching RAP establishes the endorsed remediation activities for Barangaroo including the Project Application Site. The proposed future remediation works will be undertaken in conformance with these two future RAPs and the detailed HHERA(s).

6.7 Waste Management A Waste Management Plan (WMP) has been prepared by AECOM (Appendix E) to minimise the creation of waste and the amount of waste sent to landfill, and to maximise recycling. The management procedures outlined in the WMP will prevent pollution and environmental damage, and will ensure that the waste management practices meet local, state and federal waste minimisation legislation and environmental standards. The WMP addresses the following types of waste that will be generated during the Pilot Trial:

impacted soils (i.e. soils that are potentially contaminated);

process wastes, including hazardous materials;

extracted emulsion fluid (from SEPR);

groundwater;

stormwater; and

general waste.



General wastes will be sorted into recyclable and non-recyclable streams and collected and disposed of by a general waste contractor. Trackable solid and liquid wastes, as well as extraction fluid from the SEPR will be containerised and stored on site within the containment area for disposal. Where possible, liquid waste will be treated on-site with S-ISCO chemistry, and re-used in subsequent injections to reduce the amount of material requiring off-site disposal. Contaminated solid waste will be stored in drums within the temporary spoil stockpile area at the Barangaroo Block 5 site prior to classification and off-site disposal at an appropriately licensed waste facility. The temporary storage area will be lined appropriately to prevent risk associated with sedimentation and runoff. Uncontaminated spoil material will be placed into skip bins before being characterised and disposed of. Liquid wastes including stormwater, extracted groundwater and other potentially contaminated liquids will be containerised, and where necessary, stored within the containment area to determine appropriate disposal methods on a weekly basis. Waste will be tracked through the completion of Waste Management Forms and Monthly Recycling and Waste Management Statistics which will document the waste types, volumes and destinations. Daily inspection and monthly compliance reports will also be completed to ensure that waste management practices are maintained. The project will be undertaken in accordance with Appendix E and accordingly the above recommendations are reflected in the draft Statement of Commitments.

6.8 Air Quality and Odour An Air Quality Impact Assessment (AQIA) has been prepared by AECOM and is included at Appendix R. The AQIA assesses the potential release of soil vapours from the injection chemicals and by products and vapours associated with the extraction of material associated with the proposed Pilot Trial works, and appropriate control of these potential emissions. Specifically the AQIA includes:

identification of the potential release of vapours from the injection chemicals and by-products;

identification and assessment of all relevant fugitive vapours from any extracted materials;

appropriate control of both of the above; and

proposed air quality management and monitoring procedures.

The AQIA has been prepared in accordance and/or in consideration of the Approved Methods for Modelling and Assessment of Air Pollutants in New South Wales (DEC, 2005) and Assessment and Management of Odour from Stationary Sources in NSW (EPA 2001) and Technical Notes: Draft Policy: Assessment and Management of Odour from Stationary Sources in NSW (EPA, 2001). As the scale of the proposed works is relatively minor, and their duration temporary, no significant impacts on the environment or sensitive receptors are expected.



The proposed remediation technologies have been selected for trial on the basis of a number of community benefits, including a reduced potential for air, odour, noise and vibration impacts. As demonstrated in the following section, levels of background pollutants of potential concern are negligible, only low potential emissions are anticipated likely to arise from the Pilot Trial works, and potential cumulative air quality impacts during any overlap between the Pilot Trial works and concurrent bulk excavation and basement car parking works is unlikely, but would remain below relevant DECCW assessment criteria if it did occur.

Potential impacts

The AQIA identifies that the Pilot Trials may emit volatile organic compounds (VOCs), and that potential odour emissions may occur. The Pilot Trials will treat contaminants with chemicals, specifically hydrogen peroxide, sodium persulfate, sodium hydroxide, VeruSOL and Fe-TAML. No harm to the environment is anticipated as a result of the injection of these chemicals or their chemical breakdown products. The AQIA identifies that from an air quality perspective, emissions are expected to be limited to the following sources:

emissions during the excavation and installation of the injection wells, namely small scale emissions of dust from concrete coring and drilling activities and vehicle emissions during the drilling activities. Due to the expected short duration of the drilling activities and the small number of expected boreholes to be constructed, emissions from this source are not expected to be significant and have not therefore been further assessed by the AQIA; and

emissions from the vent stack of the soil vapour extraction unit and carbon filter arising from VOCs that may be liberated through the soil vapour extraction processes, resulting in contaminant emissions to air. As these pollutants are contained within the soil, they may be liberated through the soil vapour extraction processes, resulting in contaminant emissions to air. All vent emissions will pass through a carbon scrubber and hence are not expected to be at significant levels. Despite this, as the trial will occur for a significant time period, impacts from the stack source have been further assessed in the AQIA.

The VOC emissions are also the primary source of potential odour. The primary pollutants/contaminants of potential concern that may be generated during the works / process are:

VOCs (BTEX – benzene, toluene, ethylbenzene and xylenes);

Polycyclic Aromatic Hydrocarbons (PAHs - Napthalene); and

Odour (based around the VOC concentration).

The potential effects of these pollutants on health and the environment is provided at Section 4 of the AQIA. The proposed works are not likely to involve large numbers of diesel powered plant and equipment and as a result will not generate a significant amount of pollutant emissions.

Modelling Methodology and Assumptions

Dispersion modelling has been undertaken to predict the potential effects of the proposed operation of the Pilot Trials. The CALPUFF air dispersion model has been used, in accordance with the DECCW Approved Methods (DEC, 2005).



The inputs (specifically meteorology, terrain, building parameters, modelling scenarios, source characteristics and emissions inventory), sensitive receptor locations, and methodology as to how pollutant concentrations have been estimated are detailed at Section 6.0 of the AQIA and summarised in Table 5 below.

Table 5 - Summary of AQIA dispersion modelling assumptions

Parameter Assumptions/Methodology Meteorology DECCW and Bureau of Meteorology (BOM) meteorological data

CSIRO TAPM to define upper air meteorology

CALMET meteorological model to generate three dimensional wind fields

Terrain NASA Shuttle Radar Topographic Mission digital elevation data used along

with the TAPM, DECCW and BOM meteorological data

Modelling scenarios One modelling scenario assuming constant operation of all remediation activity sources identified from VeruTEK’s Work Plan.

Source characteristics Expected stack characteristics provided by VeruTEK

Emissions inventory Inlet concentrations of individual VOC compounds equal to the highest

concentration measured in the soil vapour wells installed in the Pilot Trials

area and 99% scrubbing efficiency

Source: AECOM Air Quality Impact Assessment, September 2010 The DECCW has specified ground level concentration criteria to minimise the adverse effects of airborne pollutants on sensitive receptors (DEC, 2005). This ambient air quality criteria has been adopted for the assessment presented in the AQIA. Emission rates used in the dispersion modelling have been estimated by AECOM based on the following assumptions: Inlet concentration to the charcoal scrubber of the individual VOC compounds

is equal to the highest concentration measured in the soil vapour wells installed in the Pilot Trial areas; and

Scrubbing efficiency of the charcoal scrubber is assumed to be 99%. The DECCW ambient air quality criteria and emissions rates used in the dispersion modelling are summarised in Table 6.

Table 6 - Summary of adopted AQIA ambient air quality cirtieria and emissions rates

Pollutant of potential concern

Averaging period

DECCW criteria (mg/m3)

Emission Rates (g/s)

Emission Concentrations (ug/m3)

Benzene 1 hour 0.029 5E-06 0.0639 Toulene 1 hour 0.36 7E-06 0.0868 Ethylbenzene 1 hour 8.0 5E-05 0.565 Xylene 1 hour 0.19 7E-06 0.0868 Napthalene 1 hour 0.0129 1E-05 0.136 Source: AECOM Air Quality Impact Assessment, September 2010

Sensitive receptors

Sensitive receptors are identified by the DECCW as anywhere someone works or resides or may work or reside, including residential areas, hospitals, hotels, shopping centres, play grounds, recreational centres and the like. The closest receptors to the Pilot Trial area have been identified to be located approximately 20 m to the east of Block 5, at 30 The Bond. A child care centre is located at the bottom of this building, which is open to the street. Combined commercial / residential development is located south of the site, and a number of finger wharves containing a mixture of residential and commercial developments are located to the west, the closest being approximately 500 m south west of the site. The residential suburb of Balmain East is located approximately 700 m to the north west of the proposed Pilot Trial area.



Due to the expected low emissions from the Pilot Trials, only discrete receptors within approximately 100 m of the emission point have been examined. The details and location of sensitive receptors incorporated into the dispersion modelling are provided in the AQIA (refer to Section 6.3, Table 9) and shown on Figure 11 below.

Figure 11 – Sensitive receptor locations

Impact assessment

Predicted pollutant concentrations resulting from the dispersion modelling demonstrate that all predicated concentrations are below the relevant assessment criteria. Refer to Table 7. AECOM concludes that “based on the predicated pollutant concentration from the S-ISCO and SEPR processes, no significant impacts on the environment or sensitive receptors are expected.” In addition, AECOM concludes that “Provided the on-site activities are implemented in a manner consistent with the assumptions made by this modelling report (in accordance with proven and industry standard dust and odour management techniques as outlined in the VeruTEK Work Plan), no exceedences of DECCW criteria are predicted.”



DEC (2005) specifies that AQIAs are to assess the cumulative impact of a proposal against their impact assessment criteria. This involves adding existing background pollutant levels and expected pollutant levels from other concurrent developments to maximum pollutant concentrations predicted by dispersion modelling. As the levels of background pollutants of potential concern are negligible, the dispersion modelling has not included any cumulative values. However there is the possibility that excavation works associated with the Bulk Excavation and Basement Car Parking Project Application (MP 10_023) may occur concurrently with the Pilot Trials. An Air Quality Impact Assessment was prepared for Excavation and Basement Car Parking Project Application which predicted the likely air quality impacts at nearby sensitive receptors. The maximum ground level concentrations predicted to for the bulk excavation and basement car parking works have been assumed to be the worst case background pollutant levels for the Pilot Trials assessment. These background pollutant levels were added to the air quality impacts associated with the Pilot Trials to predict the potential cumulative air quality impacts. The cumulative impact assessment demonstrates that all predicted concentrations are below the relevant assessment criteria. AECOM also note that it is unlikely that worst case emissions from both projects would occur at the same time.



Table 7 - Predicted cumulative pollutant concentrations at sensitive receptors

(Source: AECOM Air Quality Impact Assessment)

Mitigation Measures and Monitoring

VeruTEK proposes a detailed Field Soil Vapour Monitoring Plan as outlined in the VeruTEK Work Plan at Appendix B. The Field Soil Vapour Monitoring Plan will involve:

Soil Vapour Monitoring Wells measured regularly during drilling and daily during early stages of the project, with a multi-gas meter used for screening of both shallow and deep soil gas to monitor for combustible gases and oxygen content as necessary;

Ambient Monitoring: measurement of ambient air quality on a daily basis during the early stages of the project including within the zone immediately adjacent to utility pits, service access points and monitoring well heads; and

Odour Monitoring: daily monitoring of odour at each of the locations nominated for the soil vapour field monitoring, using the Nasal Ranger odour monitoring device.



Sampling will be undertaken to ensure an adopted trigger of 10 mg/m3 of total VOC is not exceeded. Should unacceptable levels of volatile gases be detected at the Pilot Trial boundaries or in the surrounding area during the Pilot Trial, an investigation will be conducted to determine the source of the emissions, and to evaluate the appropriate measures to be implemented. These measures may include the following actions:

alteration in the works program to minimise the extent of disturbed open areas during drilling and trenching within Block 5 and on the footpath and roadway of Hickson Road;

operation of the SVE system to ensure soil vapours are directed through a filtration system before being emitted to the atmosphere;

conducting the work in more favourable weather conditions; and

use of deodorants, which do not pose a contamination or occupational health and safety hazard, within water sprays at locations on site and at the site boundaries.

The proposed monitoring plan has also been incorporated into the VeruTEK Work Plan and CMP prepared for the site (see Appendix T). The project will be undertaken in conformance with Appendices B and T and accordingly the above recommendations have been incorporated into the draft Statement of Commitments.

6.9 Noise & Vibration AECOM has undertaken a Noise and Vibration Impact Assessment for the proposed development (Appendix F). The Noise and Vibration Impact Assessment:

establishes construction Noise Management Levels (NMLs) in accordance with the DECCW’s Interim Construction Noise Guidelines (ICNG);

identifies noise sensitive receivers likely to be affected by noise and vibration from the Pilot Trial activities;

calculates noise levels likely to be associated with the Pilot Trial works; and

considers the impacts that may result from the proposed works and, if necessary, mitigation measures to manage adverse impacts.

Potential noise and vibration sources

The proposed Pilot Trial works include the following operations:

the drilling and installation of the injection wells on Hickson Road;

the excavation of a trench across Hickson Road for the installation of the injection system piping;

the installation of the injection system piping across Hickson Road to Block 5;

the installation of road plates over the trenching across Hickson Road;

the drilling and installation of the injection wells on Block 5;

the setup of the injection system on Block 5;

the undertaking of injection process, and the post injection monitoring; and

demobilisation and reinstatement of the road surface on Hickson Road.



Within these works, potential sources of noise are:

vehicles delivering equipment and materials to the site;

trench digging works;

installation of road plates;

well bore hole drilling activities;

running the injection system pumps and Soil Vapour Extraction (SVE) system; and

reinstatement of the road surface on Hickson Road.

The major noise source within the injection system is the operation of 27 electric pumps. The sound power of each pump has been based upon the sound power of a typical 0.5 HP electric pump. During operation the pumps are located within a dedicated trailer which reduces the sound pressure level of the injection system, and has been taken into account for in the calculation. During the set up phase, it is possible that while the Hickson Road injection wells are being completed, the setup of the Block 5 monitoring wells could also be undertaken. This would mean both trenching / well boring at Hickson Road and well boring at Block 5 could potentially occur at the same time. During the post injection monitoring phase, groundwater monitoring and sampling will occur using hand held submersible pumps, involving approximately 1-2 vehicles on the works site. Noise and vibration impacts from this scenario have not been assessed as no noise or vibration producing activities will be undertaken. During the demobilisation and road re-instatement phase following completion of the Pilot Trials, works will involve removal of the Pilot Trial delivery and extraction lines laid across Hickson Road, filling of the Hickson Road trench and re-instatement of the road surface. These works will take approximately 2 weeks and may take place concurrently with the post injection monitoring.

Sensitive Receivers

The nearest residential receivers have been divided into three noise catchment areas (NCAs) as indicated in Figure 12.



Figure 12 – Pilot Trial locations and noise catchment areas

The locations of nearby residential, commercial and sensitive receivers are shown at Figure 12. As shown on Figure 13 the nearest noise sensitive receivers are located at:

38 Hickson Road – Residential;

36 Hickson Road – Commercial tenant and top floor cafe; and

30 Hickson Road – Commercial tenant and Billabond Childcare Centre.



Figure 13 – Sensitive receivers

Background noise measurements

To determine the existing background noise levels adjacent to the project area, ambient noise monitoring was undertaken at three representative loctions typical of nearby residential receivers in close proximity. These locations were selected after a detailed inspection of the project area taking into consideration sensitive locations and other noise sources which may influence the measurements. The noise monitoring was conducted in accordance with the NSW DECCW Industry Noise Policy (INP) requirements. Three ‘unattended’ noise loggers were used to continuously measure existing ambient noise levels between 29 July and 5 August 2010. The noise loggers comply with Australian Standard 1259.2-1990 “Acoutstics – Sound Level Meters – Part 2: Integrating – averaging” with accuracy suitable for field and laboratory use. The sound level analyser was calibrated before and after the measurements, and no significant drift in calibration was observed. Bureau of Meteorology (BOM) weather data was initially sourced from Fort Denison BOM weather station to validate the monitoring data. Upon examination of the measured noise levels and review of attended measurements, it was determined that nearest BOM weather station data was not valid for the noise logging locations. As a result, additional attended measurements were undertaken under calm weather conditions, to validate the monitoring data. The results of the attended measurements did not show significant variation from the results of the unattended measurements. In addition to the above, ‘attended’ noise monitoring was undertaken on two occasions at a number of relevant locations on 5 and 14 August 2010. The attended noise measurements were made to assist in quantifying the contributing noise sources at the different monitoring locations and validate the monitoring data.



The locations of the surveyed (attended and unattended) noise logging sites are illustrated in Figure 14.

Figure 14 – Noise measurement locations

Construction Noise and Vibration Management Levels and Objectives

The Noise and Vibration Impact Assessment has determined construction noise management levels for residential and commercial receivers, and construction vibration objectives in accordance with DECCW’s ICNG. The Assessment also identifies appropriate construction traffic noise criteria in accordance with DECCW’s requirements. Construction noise management levels – residential receivers Table 8 presents the surveyed noise levels for daytime, evening and night periods at sensitive residential receivers and the construction noise management levels (NMLs) for each residential noise catchment area (NCA) in accordance with DECCW’s ICNG requirements.



Table 8 - Surveyed noise levels for daytime, evening and night periods at sensitive residential receivers

NCA Ref

LA90 Noise Monitoring Location

LA90 Background Noise Levels

DECCW ICNG Noise management levels (NMLs), LAEQ residential

Day Evening Night Day (SH)

Day (OOH)

Evening (OOH)

Night (OOH)

NCA1 25 Edward St Balmain

48 46 42 58 53 51 47

NCA2 50A High St, Millers Point

48 46 40 58 53 51 45

NCA3 314/3 Dalring Island Rd, Pyrmont

50 49 45 60 55 54 50

Source: AECOM Noise and Vibration Impact Assessment SH – Standard hours; OOH – Out of hours Construction noise management levels – commercial receivers The DECCWs ICNG internal NMLs for commercial land uses applicable to the proposed development during typical operating hours are:

Sensitive commercial receivers such as child care centres and community centres, LAeq 15 min 45dB(A) (internal); and

Active recreation areas (characterized by sporting activities, outdoor playgrounds and activities which generate their own noise or focus for participants), LAEQ, 15 min 65dB(A) (external).

A high level permanent opening exists on the Hickson Road façade of the playground area at the Billabond Childcare Centre, 30 Hickson Road. It has been assumed that a maximum of 5dB(A) reduction of external noise levels would be achieved by the composite façade that incorporates this opening. The DECCW’s ICNG recommends that a conservative difference between external and internal noise levels is 10dB with windows open (for adequate natural ventilation) for the purposes of a qualitative assessment. Other commercial receivers such as offices and retail outlets are assessed upon the external noise management level LAeq 15 min 70dB(A) given in the DECCW’s ICNG. Construction traffic noise The Noise and Vibration Impact Assessment adopts the DECCW’s Environmental Criteria for Road Traffic Noise (ECRTN) guidelines for assessment of the impact of traffic movements generated during the Pilot Trials. The main access road is Hickson Road, a collector road. In accordance with DECCW’s ECRTN, considering the low expected increase in vehicular activity in association with the works on Hickson Road, the Pilot Trials will not significantly raise the overall average noise level (LAeq (1hr) 60).



Impact Assessment

The Noise and Vibration Impact Assessment adopts the following assumptions for use in modelling the predicted noise impacts arising from the Pilot Trials: Even though it is unlikely, the works scenario when both trenching on

Hickson Road and well boring on Block 5 may occur at the same time has been modelled; and

For all other works scenarios, all Pilot Trial equipment will be operating at the same time, which is unlikely, and is a conservative assumption.

Tables 9 – 11 present the applicable noise criteria at the nearest sensitive receivers - residential, commercial and pre-school - in the vicinity, and predicted noise levels and identify the expected exceedance for the: Set up period (worst case mobilization and set up works); Injection and extraction operations; and Demobilization and road reinstatement. In summary, the results of the assessment are as follows: Residential receivers

During the injection and extraction operations the noise levels are not predicated to exceed the noise management levels at the nearest affected residential receivers. For the setup and demobilisation and road reinstatement periods a number of nearby receivers will potentially be exposed to noise levels that exceed the construction NMLs during the Pilot Trials works. Therefore mitigation measures should be considered for affected residents that are exposed to noise levels that exceed the NMLs.

The predicted noise levels at residential receivers are worst case situations during the setup and the demobilisation and road reinstatement periods and will not occur for long periods of time. The setup and demobilisation periods which exceed NMLs are proposed to take 2 weeks each and will not therefore substantially affect the amenity of nearby residential receivers.

Commercial receivers

Commercial receivers will only be affected during standard hours (it has been assumed that the Billabond Childcare Centre does not operate on weekends). There are a number of nearby receivers exposed to noise levels that exceed the construction NMLs during the works. Therefore, mitigation measures should be considered for these affected receivers.

Predicated noise levels for internal noise levels within the Billabond Childcare Centre were done assuming a window open for adequate natural ventilation. In the cases where predicted noise levels exceed the internal NMLs within the Billabond Childcare Centre.

Noise levels from the proposed development are not predicted to exceed the NMLs for the Cruise Passenger Terminal.

Predicted noise levels are for the worst case situations during the setup and the demobilisation and road reinstatement periods and so these predicated noise levels will not be the noise levels that the receivers are continually exposed to. It should also be noted that the works in which exceedences occur are short term works and do not occur for periods longer than 2 weeks.



Table 9 - Predicted noise levels – Residential receivers

Receiver (worst affected level of building)

LAeq(15min) Noise level (external) (dB(A)) Predicted (external)

Standard hours OOH (evening) OOH (Saturday) Criteria Exceedance Criteria Exceedance Criteria Exceedance

Setup Period (worst case mobilisation and set up works) 38 Hickson Road, Millers Point

70 58 12 51 19 53 No work

undertaken

Kent St Residential Apartments (western facade)

69 58 11 51 18 53 No work

undertaken

Injection and extraction operations 38 Hickson Road, Millers Point

38 58 - 51 - 53 -


39 58 - 51 - 53 -

Demobilisation and road reinstatement 38 Hickson Road, Millers Point

65 58 7 51 14 53 No work

undertaken


60 58 2 51 9 53 No work

undertaken

Table 10 - Predicted noise levels – Commercial receivers

Receiver LAeq(15min) Noise level (dB(A)) Predicted (external)

Standard hours Criteria Exceedance

Setup period (worst case mobilisation and set up works)

36 Hickson Road, Millers Point 73 70 3

30 Hickson Road – Commercial1 69 70 -

Cruise Passenger Terminal 50 70 -

Injection and extraction operations

36 Hickson Road, Millers Point 33 70 -

30 Hickson Road - Commercial1 47 70 -


Demobilisation and road reinstatement

36 Hickson Road, Millers Point 63 70 -

30 Hickson Road - Commercial1 57 70 -




Table 11 - Predicted noise levels – Billabond Childcare Centre

Receiver LAeq(15min) Noise level (dB(A)) Predicted (external)

Internal Playground area Criteria Exceedance Criteria Exceedance

Setup period (worst case mobilisation and set up works)

Billabond Childcare Centre – 30 Hickson Road, Millers Point

67 552 12 703 -

Injection and extraction operations


471 552 - 703 -

Demobilisation and road reinstatement


57 552 2 703 -

Cumulative Noise Impacts

Construction and excavation works are to take place concurrently with the Pilot Trial works at the Barangaroo Stage 1 area and the Barangaroo Headland Park. The noise impacts on nearby receivers from these works are assessed in the:

Wilkinson Murray Report: Barangaroo Stage 1 Bulk Excavation and Basement Car Parking PA1 (MP 10_0023) Supplementary Excavation and Construction Noise and Vibration Assessment September 2010; and

Acoustic Logic Consultancy Report: Barangaroo Headland Park, Early Works Noise and Vibration Assessment June 2010.

The combined indicative construction program is illustrated in Figure 15.

Figure 15 – Combined indicative construction program

Predicated noise levels of the cumulative activities as a result of the proposed Pilot Trials works and concurrent construction works are detailed at Table x. The impact of concurrent works will increase the noise levels at nearby receivers during the scenarios in which the Pilot Trial works would exceed the construction NMLs.



The cumulative noise levels exceed the construction NMLs at all times during the Pilot Trial period, even though the Pilot Trial works will only contribute to the overall noise level during the 2 week set up and the demobilisation and road reinstatement periods.

Construction Traffic Noise

The Noise and Vibration Assessment adopts DECCW’s Environmental Criteria for Road Traffic Noise (ECRTN) guidelines to assess construction traffic noise associated with the proposed development. The applicable daytime criteria is land use developments with potential to create additional traffic on collector roads (LAeq 1 hr 60). The road most impacted by traffic generated by the proposed activities is Hickson Road. Access to the Site Compound on Block 5 will be via Hickson Road. AECOM has concluded that in all cases traffic arising from the development should not lead to an increase in existing noise levels of more than 2dB and that the increase in traffic numbers as a result of the proposed works would have minimal effect. In order to minimise the potential risk to exceed the noise criteria at residential receivers on collector roads, AECOM has recommended the following measures:

Vehicle movements (including delivery vehicles) to be restricted to the standard construction hours;

Delivery vehicles to have mufflers and any other noise control equipment maintained in good working order;

Drivers are to avoid heavy acceleration and braking as far as is practicable; and

Routes are to be selected so as to minimise the use of reversing alarms.

Vibration Assessment

Vibration intensive works are proposed to occur during the auger boring activities. AECOM has concluded that the recommended noise mitigation measures are sufficient to mitigate the effects of human discomfort due to vibration intensive activities. If works are scheduled to occur near a building, within the safe working distance for cosmetic damage, works should not proceed unless attended vibration measurements are undertaken at the commencement of the works. A permanent vibration monitoring system should be installed, to warn operators when vibration levels are approaching the cosmetic damage objective. If works are scheduled to occur near a building, within the safe working distance for human response but outside the safe working distance for cosmetic damage, additional measures identified in the Noise and Vibration Assessment will be sufficient to mitigate the impact of vibration at nearby residential receivers and therefore vibration monitoring will not be required at these properties. AECOM has concluded that in accordance with measured vibration levels, as long as boring is undertaken at distances greater than 2.5 metres from the nearest potential receiver, there will not be any required mitigation measures for nearby receivers.



Management and Mitigation Strategies

DECCWs ICNG accepts that large scale construction often results in excessive noise, albeit on a temporary basis, and stresses the importance of community engagement and demonstration by contractors of best practicable means of controlling noise, and including noise mitigation measures in the construction management plan to minimise noise impacts. The proposed Pilot Trial works are scheduled to occur Monday to Friday – 7.00 am to 6.00 pm and Saturday – 8.00 am – 1.00 pm, except for during the injection and extraction operations which will by 7.00 am to 6.00 pm Monday to Saturday. All construction activities associated with the proposed works will be subject to the standard noise and vibration mitigation measures identified in the Noise and Vibration Management Plan (refer to Section 5.2 of the Assessment Report). Noisy activities will be subject to additional mitigation measures depending on the extent of predicted or measured impacts, including

Heavy vehicle noise mitigation;

Adoption of truck routes to and from the worksite in accordance with the Traffic Management Plan;

Selection of equipment taking into account noise and vibration emissions;

Management of potential impact of reversing alarms.

It has been recommended that attended noise monitoring be undertaken at a number of representative locations as identified at Table 17 and Appendix E of the Noise and Vibration Assessment during the mobilisation and setup, and demobilisation stages.

Monitoring is not required during the injection and extraction operations phase, or the post injection monitoring phase, however AECOM has suggested that in the case of complaints from close by noise receivers noise monitoring is undertaken to as to determine the problem noise sources and the levels that they are producing.

Any noise or vibration complaints will be addressed in a timely manner, in accordance with the Incidents and Complains Management Plan within the VeruTEK Construction Management Plan.

AECOM has concluded that provided the recommended mitigation measures are implemented the requirements of the DECCW’s ICNG will be satisfied.

The proposed works will be carried out in accordance with the Noise and Vibration Impact Assessment and its recommended mitigation measures which have been incorporated into the draft Statement of Commitments.

6.10 Health Impacts A Health Impact Assessment has been prepared by AECOM (Appendix S) to identify the potential health impacts associated with the proposed Pilot Trials, in order to determine whether the project will result in unacceptable acute or chronic health effects. Due to the limited nature of the proposal, and its temporary time frame, potential health impacts are not considered to be significant. The main potential for human health impacts is considered to be through the inhalation of vapours originating from contaminated materials that are subject of the Pilot Trials.



As identified at Section 6.8 all predicted pollutant concentrations from the S-ISCO and SEPR processes will be below the relevant DECCW assessment criteria, and provided the on-site activities are implemented in a manner consistent with the proven industry standard dust and odour management techniques as outlined in the VeruTEK Work Plan, no exceedences of DECCW criteria are predicated. Therefore, the impacts are considered to be low. As detailed at Appendix S, dermal contact and oral ingestion of deposited dust are not considered likely to significantly affect health. The potential for adverse health effects upon site and maintenance workers is therefore considered to be moderate but manageable. To ensure that potential human health impacts on nearby sensitive receptors, the Health Impact Assessment recommends that the pollutant management measures such as soil and vapour monitoring (refer to Section 6.8), hoardings and the use of extraction pumps will be implemented. With the implementation of effective control measures, the report concludes that the risk of exposure to harmful concentrations of Pollutants of Potential Concern would be low and acceptable. The project will be undertaken in accordance with Appendix S and accordingly the above recommendations are reflected in the draft Statement of Commitments.

6.11 Visual Impact Assessment A Visual Impact Assessment has been prepared by AECOM (Appendix I) to assess the visual impact of the temporary structures on the surrounding environment. The report identifies the key observer groups that will observe the temporary structures as employees of surrounding commercial buildings, users of the child care facility, pedestrians on Hickson Road and residents of surrounding buildings. The report notes that the materials and machinery required to undertake the proposed Pilot Trials will have a relatively minor visual impact, particularly given the placement of the hoarding, which will limit the visual impact from the street. The presence of mature fig trees along the Barangaroo site’s boundary with Hickson Road, will further screen the Block 5 site from the street. The components of the site that will most visible are the concrete barriers and hoarding associated with the Hickson Road Pilot Trial site, and the hoarding attached to the Block 5 fence. Given the temporary nature of the Pilot Trials, the impacts of the works and hoardings are considered to be minor. The photomontages prepared by Virtual Idea (refer to Appendix J) demonstrate the minor visual impact associated with the works. The hoarding will generally comply with the City of Sydney’s standards where relevant, and may incorporate information about the S-ISCO and SEPR Pilot Trials and remediation process.

6.12 Environmental, Construction and Site Management

A Construction Management Plan (CMP) has been prepared by VeruTek Technologies (Appendix T) to address the DGRs. The CMP provides a overview of the project sequencing and addresses the following:

Health and Safety.

Environmental Management Plans including:

- Traffic Management Plan,

- Noise and Vibration Management Plan,

- Waste Management Plan,



- Air Quality and Odour Management Plan,

- Water Management Plan, and

- Community Consultation Strategy.

Incident / Emergency Response Plan.

The Environmental Management Plans address the impact of the Pilot Trials on adjoining developments and outlines the proposed measures to mitigate against those impacts. The project will be undertaken in accordance with Appendix T and accordingly the above recommendations are reflected in the draft Statement of Commitments.

6.13 Heritage

6.13.1 Non-Indigenous Archaeology A Non-Indigenous Archaeological Assessment has been undertaken by Casey and Lowe and is located at Appendix K. The Assessment notes that archaeological resources may be present in the subsurface of the Pilot Trial area. These resources may include timber, metals, sandstone, ceramics, glass, masonry, lime mortar, organics and middens. The Assessment concludes that the impacts are limited to the auguring of seven 100mm boreholes and the penetration of chemicals within the surrounding 100m2 to neutralise contamination within the area. The report confirms that sub-surface relics in the Pilot Trial area will not be affected by the chemical processes which will remediate the soils and groundwater. As a result, the impacts of the Pilot Trials on the gasworks archaeology would be quite minor in terms of the overall size of the gasworks archaeology. The Assessment makes the following recommendations:

due to the minor nature of the 24 small holes in each area and the auguring, no archaeological monitoring is required and so substantial remains would be recovered by this process; and

an Archaeological Assessment should be commissioned for Block 5 which addresses the heritage significance of the gasworks as a whole. This should be undertaken following the Pilot Trials so the success of the in-situ remediation can be factored into the assessment of the site’s heritage significance.

As required by the Barangaroo Concept Plan Statement of Commitments, an Archaeological Research Design and Management Strategy has been prepared by Casey and Lowe and is located at Appendix N. The Strategy is intended to provide guidance and methodologies for undertaking the archaeological program within the approved development. Whilst the Strategy was prepared for Barangaroo Stage 1, the same methodology would be applied to the Pilot Trial works where relevant.

6.13.2 Indigenous Archaeology An Aboriginal Cultural Heritage Assessment has been prepared by Comber Consultants for the Block 5 and Hickson Road Pilot Trial Sites and is located at Appendix M.



There are no recorded Aboriginal sites within the Project Application Site. The statement notes the study area has no archaeological potential. The Pilot Trials will be undertaken within the reclaimed land that has been highly disturbed by the construction and operation of the gasworks. Block 5 does not contain parts of the original shoreline (which may contain archaeological deposits) and the Hickson Road Pilot Trial area is within a tar tank, the construction of which would have disturbed any potential Aboriginal sites. Because no Aboriginal objects will be damaged or disturbed during the Pilot Trials, no permit is required from DECCW for the S-ISCO Pilot Trials. Again, as required by the Barangaroo Concept Plan Statement of Commitments, an Archaeological Research Design and Management Strategy has been prepared by Casey and Lowe and is located at Appendix N. The Strategy is intended to provide guidance and methodologies for undertaking the archaeological program within the approved development. Whilst the Strategy was prepared for Barangaroo Stage 1, the same methodology would be applied to the Pilot Trial works where relevant

6.13.3 Interpretation Strategy The approved Concept Plan’s Statements of Commitment require an Interpretation Strategy to be prepared prior to any works commencing that involve surface disturbance. An Outline Interpretation Plan has therefore been prepared by Tanner Architects and is located at Appendix Q. The principles of the Plan, which was prepared for the entire Barangaroo Stage 1 area, will be adapted for the Block 5 and Hickson Road Pilot Trial sites: The Plan:

identifies the themes and messages considered significant to the Stage 1 area;

develops a conceptual approach to interpretation of the Stage 1 area, using a variety of means;

proposes locations for specific interpretation to enhance the understanding of the heritage significance of the Stage 1 area; and

recommends methods and media appropriate to the interpretation of the Stage 1 area.

Although unlikely to apply, where appropriate, interpretation options recommended in the strategy will be implemented through the Block 5 area. During the works, any archaeological relics or other cultural artifacts identified will, where appropriate, be incorporated into future public displays.



7.0 Draft Statement of Commitments

7.1 Monitoring and Contingency Procedures Lend Lease makes the following commitments regarding the detailed monitoring and contingency procedures required for the Pilot Trials:

implementing environmental, health and safety measures as outlined in the VeruTek Work Plan and CMP to ensure the Pilot Trial works are undertaken in a manner that does not give rise to unacceptable impacts on human health or to the environment;

to undertake the soil, water, air and other monitoring as required by the VeruTek Work Plan and CMP to monitor compliance and effectiveness of the trial, and allow the trial to be adaptive to respond to monitoring results

where required, implement contingency procedures as outlined in the VeruTek Work Plan to respond to monitoring results (eg. Additional water / vapour extraction)..

7.2 Traffic Management and Accessibility Impacts

Pilot Trial works will be undertaken generally in accordance with the Construction Traffic Management Plan prepared by AECOM. Lend Lease make the following commitments regarding construction traffic control:

The site traffic control recommendations for each worksite gate entry or exit point (including all appropriate signage) should be determined by means of a “Traffic Control Plan” to be prepared by an RTA accredited contractor.

Each site entry and/or exit gate number and the name or other description of its proposed activity should be clearly signposted for the benefit of all approaching site traffic, in particular emergency services vehicles.

The vehicular traffic movements at each of the site entry or exit gates for traffic to and from Hickson Road will potentially need to be controlled by a flagman to ensure no potential traffic safety conflicts occur between the site truck traffic and pedestrians on the adjacent footpath.

Traffic management measures will be established to guide and control vehicles through the work site on Hickson Road. These may include temporary speed restrictions, advanced warning signs and delineation where the route alignment has changed.

7.3 Soil and Water Lend Lease make the following commitments regarding soil and water management:

Water quality monitoring will undertaken as described in the Soil and Water Impact Assessment report at Appendix P.

The following water quality control measures will be implemented: erosion and sediment control measures, routine visual inspections, stormwater management and water quality monitoring.

Water quality criteria that will be applied for this project will be generally based on the recommendations provided in the ANZEC Guidelines.



Implement the management and mitigation measures outlined in the Soil and Water Impact Assessment that include, but are not limited to:

- preparation of a Spill Management Plan to mitigate any risks associated with solid and liquid spills;

- development of engineering strategies for spill prevention and control;

- training programs to prevent and control spills and leaks;

- administrative strategies to prevent and control spills and leaks;

- implementation of shut down procedures in the event of an injection line release under Hickson Road;

- implementation of shut down procedures in the event of hazardous substances being released from injection line and injection well head;

- use of bicarbonate powder to neutralise sodium persulphate release; and

- reporting of any releases.

7.4 Waste Management Construction works will be undertaken in accordance with the Waste Management Plan (WMP) prepared by AECOM.

7.5 Air Quality and Odour A monitoring program will be implemented that includes monitoring of PM10 levels, which will allow reactive management of elevated dust concentrations.

7.6 Noise & Vibration All construction activities will be managed in accordance with the Noise and Vibration Management Plan prepared by AECOM.

7.7 Health All construction activities will be managed in accordance with the Health Impact Assessment prepared by AECOM.

7.8 Environmental, Construction and Site Management

All construction activities will be managed in accordance with the Construction Management Plan prepared by VeruTek Technologies.

7.9 Heritage

7.9.1 Non-Indigenous and Indigenous Archaeology

If, during the course of the redevelopment, any previously undetected Aboriginal “objects”, artefacts or sites are uncovered, work must cease in the vicinity of that object, artefact or site and further advice sought from the archaeologist who undertook the program of sub-surface testing.



7.9.2 Interpretation Strategy An Outline Interpretation Plan has been prepared by Tanner Architects and is located at Appendix Q. The Plan was prepared for the Stage 1 area, however the strategies will be adopted in the Block 5 and Hickson Road sites where appropriate. The Plan:

identifies the themes and messages considered significant to the Stage 1 area;

develops a conceptual approach to interpretation of the Stage 1 area, using a variety of means; and

proposes locations for specific interpretation to enhance the understanding of the heritage significance of the Stage 1 area.

Where appropriate interpretation options recommended in the strategy will be implemented on the Block 5 site. During the Pilot Trials any archaeological relics or other cultural artefacts identified will, where appropriate, be incorporated into future public displays.



8.0 Conclusion This Project Application seeks approval for the Pilot Trial of two in situ remediation technologies to remediate soil and groundwater contamination within a nominated test area of Block 5 and a part of Hickson Road within the NSW DECCW Remediation Site Declaration 21122. The objective of the Pilot Trial is to determine the effectiveness of the S-ISCO and SEPR remediation technologies for potential future remediation of contaminated soils and ground water and to refine the design of these technologies for potential full scale implementation. The trials are a necessary precursor to the finalisation of a final remediation strategy. The Pilot Trial involves minimal site works, and is generally limited to the drilling of wells, set-up of the chemical injection facilities and storage of chemicals and equipment. The Pilot Trial to be carried out on Hickson Road will require the establishment of a trench across the Road. The works creating any discernible impacts will be during the set-up and site establishment phase, which will occur during the first 2 weeks (approximately) of work commencing. Further, as the Pilot Trial will only operate for between approximately four to six months, the proposal will not result in any unreasonable or long term disturbances to the surrounding properties. The proposed technologies have been selected as the current preferred remediation method following a review of a number of options. Their selection is based on a number of key benefits, including:

the methods are less intrusive than traditional ex-situ treatment techniques which would involve the removal of contaminated soil and groundwater and its transportation for subsequent treatment. The in-situ technologies, if proved successful through trialling, will avoid the need for excavation of contaminated soils from both Block 5 and Hickson Road and subsequent transportation to a treatment site of Barangaroo, which would benefit the local community through the reduction in environmental impacts including air, odour, noise and vibration impacts.

SEPR and S-ISCO are considered sustainable technologies that can achieve remediation with a lower energy use and waste generation compared to ex-situ treatments and disposal methods. This minimises waste to landfill and associated truck movements.

SEPR and S-ISCO has been successfully proven at other gasworks sites.

as excavation of Block 5 or Hickson Road is not required as part of Barangaroo Stage 1 works, an in-situ method is likely a more cost-effective approach than ex-situ methods.

In light of the merits of the proposal and in the absence of any adverse environmental impacts from the Pilot Trial, it is considered that this development should be granted consent under Part 3A of the EP&A Act.

environmental assessment report project application

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