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 outlined in the remediation action plan (RAP) • To provide an estimated timeline for the proposed works in the next 2 years • Q and A session. 2
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 o Breakfast Point, Cabarita Park and Mortlake regions Project hotline and email address o Community, business and stakeholder meetings – an open offer to all who would like to hear o from the project team Consultation website www.kendallbayremediation.com.au - including background reports, o 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 o Community Information and Feedback Sessions (CIFS) – open to all, drop-in information and o displays, formal presentations, Q and A, formal feedback forms. 3
Community Consultation (cont…) • Other activities include: Email updates to a broad stakeholder database – including all who have registered on the o website or through other events to receive further information and updates Advertising in the local newspapers – Burwood Scene (circulation 35,000, readership 50,000; o Inner West Courier (circulation 79,110, readership 100,000) Letter updates and invitations to the Mayor, Councillors, Director of Planning and Manager of o 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) o An open invitation to let us know of other ways to engage and communicate with people o throughout the process. 4
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. 5
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. 6
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. 7
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 o Authority approvals – compliance with EPA contaminated land guidelines and site remediation o 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 o 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. 8
Access Options Assessment Cont… 9
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. 10
Remediation Areas 11
Remediation Action Plan (RAP) • 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 o treatment facility (140 Tennyson Rd) the sediment would be de-watered; with the treated water returned to the Parramatta River o the sediments would then be stabilised to a General Waste classification prior to transport to o an off-site authorised waste transport facility the excavated area is then capped to the original seabed surface level. o Existing sea bed Same sea bed level Clean sandy fill layer Engineered layer Existing impacted sediments Remaining sediments Before Remediation Capping Activities After Remediation Capping Activities 12
Concept Site layout: 140 Tennyson Rd 13
Proposed Remediation Works Cont… • The proposed treatment facility will maintain the following mitigation measures: A reverse pressure enclosure will be constructed in order to minimise atmospheric exposure o to odours There will be continuous monitoring of air quality (odour and dust), water (turbidity and o 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 o Remediation strategy is technically feasible o Remediation work is environmentally justifiable o Consistent with relevant laws, policies and guidelines. o 14
Estimated Project Works Timeline 3 months Site Establishment 6 months Remediation Works 3 months Site De-mobilisation 12 months 4 months Total Project Time (incl Contingency) 0 3 9 12 Contingency 15
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