Kendall Bay Sediment Remediation Project: Project Update Jemena - - PowerPoint PPT Presentation

Kendall Bay Sediment Remediation Project: Project Update

Jemena Limited

Objectives of Presentation

• To provide an update on the current progress of the proposed

remediation project

• To provide a summary of the proposed remediation methodology as
• utlined in the remediation action plan (RAP)
• To provide an estimated timeline for the proposed works in the next 2

years

• Q and A session.

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Community Consultation

• Jemena continues to actively engage the community on a regular basis:
• Community newsletters (7) – distributed on a regular basis to ~4,400 households across

Breakfast Point, Cabarita Park and Mortlake regions

• Project hotline and email address
• Community, business and stakeholder meetings – an open offer to all who would like to hear

from the project team

• Consultation website www.kendallbayremediation.com.au - including background reports,

newsletters, presentations, information and display boards, feedback forms, summaries of community feedback, an issues and response log, and summary notes from the Community Liaison Group (CLG)

• Community Liaison Group (CLG) meetings – approximately once every 4 – 6 weeks
• Community Information and Feedback Sessions (CIFS) – open to all, drop-in information and

displays, formal presentations, Q and A, formal feedback forms.

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Community Consultation (cont…)

• Other activities include:
• Email updates to a broad stakeholder database – including all who have registered on the

website or through other events to receive further information and updates

• Advertising in the local newspapers – Burwood Scene (circulation 35,000, readership 50,000;

Inner West Courier (circulation 79,110, readership 100,000)

• Letter updates and invitations to the Mayor, Councillors, Director of Planning and Manager of

Health, Building and Environment at Canada Bay Council, and State and Federal Members of Parliament

• Community surveys and attendance at local events (such as markets)
• An open invitation to let us know of other ways to engage and communicate with people

throughout the process.

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Background

• Kendall Bay - historically used for loading and unloading coal and other materials

associated with the former AGL Mortlake gasworks. Mortlake gasworks was successfully rehabilitated in 2002, and is now part of the Breakfast Point residential development.

• With the completion of the remediation works at the gasworks, the NSW Environment

Protection Authority (EPA) then focused on regulating and achieving remediation of sediments within relevant areas of Kendall Bay.

• Investigations carried out in the Bay by AGL 2001-2004 established that areas of the

Bay are contaminated.

• In May 2004, an area comprising Kendall Bay within 200m from the shoreline was

declared a ‘Remediation Site’ under Section 21 of the Contaminated Land management Act.

• In 2005, AGL prepared a voluntary remediation proposal and entered into a voluntary

remediation agreement (VRA) with the EPA. AGL committed to further investigate and then remediate areas of Kendall Bay identified as requiring remediation.

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Background cont…

• Jemena (Alinta) inherited AGL’s VRA obligations in late 2006, when the AGL Group

was split up.

• In 2006/07 AGL and then Alinta agreed with NSW EPA and Department of Health on

the areas of Kendall Bay requiring remediation. This was assessed based on the need to protect human health, and information available at that time.

• From 2007 – 2010 a number of studies were carried out, and in 2010 a tender process

was initiated by Jemena to determine and cost a potential remediation approach.

• Since then, the focus has been on resolving land access issues as well as better

understanding the extent of the contamination and geotechnical conditions within the areas requiring remediation.

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Background cont…

• In Dec 2012, Jemena submitted a Planning Proposal to Canada Bay Council for the

use of a portion of Cabarita Park to access the remediation area. This was not supported.

• Council asked Jemena to find an “Option B” for accessing the remediation area.
• Jemena had already sought alternative sites for a number of years, without success.

However, in early 2013, Jemena identified the property at 140 Tennyson Rd, Mortlake. This property was previously not available.

• Following the completion of a technical due diligence process, the Tennyson Rd

property was purchased in Dec 2013.

• The purchase of the property is based on the view that its use in the remediation of

Kendall Bay is technically feasible.

• However, a further detailed environmental assessment is required through an

Environmental Impact Statement (EIS), before the Property can be used as part of the remediation of Kendall Bay.

Access Options Assessment

• A range of site access options were investigated according to specific criteria,

summarised as follows:

• Availability – timing of when the site is required
• Authority approvals – compliance with EPA contaminated land guidelines and site remediation

principles, planning approval and other legal requirements and zoning

• Engineering/ Logistics – the nature of the works in order to identify what needs to enter and

depart the works area, the scale of logistics required in order to appreciate the potential environmental impacts, acceptable safety, including maritime safety.

• Since 2009, 51 locations were investigated as potential access points and treatment

sites, the furthest being a site in Port Kembla, approx. 95km south of the Kendall Bay

• This included the RMS site at Wentworth Point. Jemena engaged advisors APP to

approach RMS on their behalf, on several occasions, regarding the option of using Wentworth Point for remediation works.

• RMS advised that the site was neither available nor appropriate for use. This advice

was provided again most recently on 20 February 2014.

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Access Options Assessment Cont…

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Access Options Assessment Cont…

The investigation regarding alternative access options concluded that:

• 140 Tennyson Road is the only site which is available to Jemena, so close to site that for

practical purposes it should satisfy the EPA’s strong preference for treatment on site, and potentially capable of satisfying requirements for authority approvals.

• Confirmation that Cabarita Park is the only other site capable of satisfying all the

technical and potentially regulatory requirements. Legal mechanisms exist to enable regulatory compliance, but require Council support.

• The EPA is unlikely to support a remediation strategy that involves the offsite

transportation of un-treated material.

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Remediation Areas

• According to the Planning Guidelines of SEPP 55, written by the EPA in 1998, the RAP

is to: “demonstrate how the proponent or their consultant proposes to reduce risks to acceptable levels and

achieve the clean-up objectives for the site”

• Based on the use of 140 Tennyson Road as a treatment facility and staging area for the

proposed works, the remediation methodology would entail:

• a wet excavation technique, potentially using suction pipes to move the sediment to the

treatment facility (140 Tennyson Rd)

• the sediment would be de-watered; with the treated water returned to the Parramatta River
• the sediments would then be stabilised to a General Waste classification prior to transport to

an off-site authorised waste transport facility

• the excavated area is then capped to the original seabed surface level.

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Remediation Action Plan (RAP)

Before Remediation Capping Activities After Remediation Capping Activities

Clean sandy fill layer Engineered layer Remaining sediments Existing impacted sediments Existing sea bed Same sea bed level

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Concept Site layout: 140 Tennyson Rd

Proposed Remediation Works Cont…

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• The proposed treatment facility will maintain the following mitigation measures:
• A reverse pressure enclosure will be constructed in order to minimise atmospheric exposure

to odours

• There will be continuous monitoring of air quality (odour and dust), water (turbidity and

impacts) and noise.

• It may also be noted that remediation works routinely occur in residential areas, a

current example of which is at HMAS Platypus , Neutral Bay

• The remediation strategy must satisfy the following requirements:
• No unacceptable risk to human health or the environment
• Remediation strategy is technically feasible
• Remediation work is environmentally justifiable
• Consistent with relevant laws, policies and guidelines.

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Site Establishment Remediation Works Site De-mobilisation Total Project Time (incl Contingency)

3 months 3 months 6 months 12 months 4 months 3 9 12

Estimated Project Works Timeline

Contingency

Environmental Impact Statement

• Initially the remediation of Kendall Bay was considered under the Part 3A framework. In

2011, the NSW Government repealed Part 3A of the EP&A Act 1979

• In May 13 Jemena received notification from the Department of Planning and

Infrastructure (DPI) that the proposed Kendall Bay remediation works were being transitioned from a Part 3A to the State Significant Development framework

• An SSD planning proposal requires an Environmental Impact Statement (EIS) to

assess all potential impacts of the remediation works, including the use of 140 Tennyson Rd. When completed, the EIS will be on public exhibition for a minimum of 30 days

• The EIS has been initiated with all specialist studies scheduled to be undertaken during

the months Feb-May 14. The EIS will be based on the method included in the Remediation Action Plan (RAP)

• Community consultation will continue throughout the EIS process.

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Sequencing of the Planning Process

Updated Director General Requirements Carry out baseline environmental reporting Commence EIS Identify potential impacts and mitigation measures Finalise EIS Submit to DP&I for public exhibition

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• WE

ARE HERE

Environmental Impact Statement cont…

• The EIS will include specialist studies to investigate potential issues and impacts as a

result of the proposed works

• The specialist studies will include the following topics:
• Jemena will make the EIS and all specialist studies available as part of the

development application, which will be publicly exhibited.

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• Traffic
• Air Quality (dust

and odour)

• Soil and Water
• Flora and Fauna
• Human Health

Risk Assessment

• Visual Impact

Analysis

• Community

Impact Assessment

• Heritage/

Archeology

• Acoustic
• Site Security
• Waste

Management

• Hydrology

Assessment

• Preliminary

Hazard Analysis

Illustration of Impact Assessment Approach

• The EIS is a concise environmental assessment - identifies potential

environmental and social impacts, recommends mitigation measures

• The EIS will include a comprehensive cumulative impact assessment.

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Traffic Acoustics Air/odour Water

Step 1 - Baseline studies and data Traffic counts for 7 days identifying traffic movements in the vicinity

• f the site

Noise logging at nearest residential receivers in Mortlake and Kendall Bay Sediment sampling within Kendall Bay of impacted sediments. Odour flux assessment by independent laboratory Collect water samples within Kendall Bay and Fairmile Cove Step 2 - Modelling and assessment Assess traffic impact on local roads, in terms of safety (turning movements) and efficiency. Assess intersection impacts and level of service post project. Assess cumulative traffic impacts Model impacts based on machinery proposed, equipment and remediation

• approach. Assess impacts

based on Industrial Noise Policy, vibration and impacts to receivers from both remediation activities and traffic noise Determine odour thresholds to determine

• dour units of the project

based on remediation approach Consider and assess water discharge levels from waste water treatment plant Step 3 - Impact and mitigation measures Assess impacts of project

• n traffic and mitigation

measures on and off-site Assess impacts and mitigation measures, such as hours, noise shielding, type of equipment, etc Assess impact and consider mitigation measures for management

• f sediment

Determine the appropriate discharge point for waste water and mitigation devices

Q and A Session

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Way Forward

(Q4 2014) SSD Approval Following the public exhibition of the EIS, Jemena seeks SSD approval from the DP&I (Q3 2014) EIS Public Exhibition Results and outcomes of the EIS will be made publicly available (Q1- Q2 2014) EIS Begin specialist study investigations (Q1 2014) 140 Tennyson Road Ownership Jemena take

• wnership of the

property (Q1 - Q2 2015) Break Ground Set up of Tennyson Rd facility and remediation works to begin. Works expected to be12 months in duration (Q2 2014) RAP Approval EPA Approval of the RAP for the remediation of Kendall Bay

Close

Thank you

Visit: www.kendallbayremediation.com.au Phone: 1800 266 901 Email: kendallbay@jemena.com.au

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