Remediation works

History of Works completed

Since the site closed in 1985, there have been numerous environmental investigations, which are summarised in the final Remediation Action Plan (RAP)

The Stage 1 Remediation works included the removal of above-ground infrastructure and limited soil remediation. These works did not require development consent. A RAP for Stage 1 was prepared, and an Environmental Management Plan followed, to manage potential impacts on the local community or environment. The Stage 1 works were validated by environmental consultants and the validation report was provided to the EPA in November 2015.

Other work included the completion of soil and groundwater sampling and the installation of a boundary groundwater control system (now decommissioned). Most recently, works have involved regular groundwater sampling and sampling of surface water in Styx Creek, upgrades to security lighting, fence repairs and the removal of graffiti.

The EIS was assessed by DPI&E, with input from the EPA and other relevant agencies.  DPI&E granged consent for the project on July 18, 2019 and work was completed on site in August 2020, with all consent conditions finalised in April 2021.

Project Timeline



1913 – 1985

Clyde Street Gasworks are operated by the Newcastle Gas Company (AGL) from 1913 to 1985, producing ‘town gas’, which was used for heating, lighting and cooking.

June 1988

The site is first regulated as a contaminated site requiring remedial action, pursuant to a notice under Section 35 of the NSW Environmentally Hazardous Chemicals Act 1985 issued on 10 June 1988.

1998 – 2015

Various environmental assessments and investigations are conducted at the site since 1988.

February 2005

Innova Soil Technology trialled the use of direct thermal desorption on 500 tonnes of contaminated soil from the site. The trial involved excavation of contaminated soil, transportation of the contaminated soil to the Mayfield site where the Innova thermal desorption unit was located, screening, mixing and blending of the contaminated soils and treatment by direct thermal desorption.

September 2006

AGL lodges an application for Ministerial approval to carry out the proposed remediation of the site under Part 3A of the EP&A Act.

AGL also seeks the Director-General’s environmental assessment requirements (DGRs) to address in the Environmental Assessment (EA) of the proposed remediation works.

December 2006

Jemena acquires the site from AGL as part of a business transaction.

February 2007

DGRs to be addressed in the EA are issued to AGL, with an expiration date of 8 February 2009. Application is subsequently withdrawn.

June 2011

VeruTEK Technologies conducted out a laboratory scale oxidation trial to assess potential degradation of gasworks organic contaminants from the site. The trial found that the surfactant and activated oxidant can degrade the hydrocarbon and coal tar related chemical compounds at the site.

August 2011

The 1988 remediation order issued Section 35 Environmentally Hazardous Chemicals Act 1985 is revoked as the legislation is repealed.

EPA declare the site to be significantly contaminated land under the Contaminated Land Management Act 1997 (CLM Act) on 18 August 2011.

March 2012

Jemena submit Voluntary Management Proposal No. 1 for the site (VMP No.
1), to the EPA for approval.

August 2012

EPA approves VMP No. 1 for the site, pursuant to Section 17 of the CLM Act on 17 August 2012. The main objectives of VMP No. 1 were to:

  • “Define the nature and extent of the impact of soil and groundwater contamination at the site.
  • Define the nature and extent of the impact of groundwater contamination from the site to adjoining sites.
  • Collection of information to enable a subsequent VMP No. 2 to be provided to the EPA which will assess contamination management options for the site (i.e. feasibility studies and the identification of pilot trials for suitable contamination management technologies to remediate the site, as required).”

December 2013

Jemena submit Voluntary Management Proposal No. 2 for the site (VMP No.
2), to the EPA for approval, after completing the investigative works required by VMP No. 1.

January 2014

EPA approves VMP No. 2 for the site, pursuant to Section 17 of the CLM Act on 20 January 2014. The main objectives of VMP No. 2 are:

  • “To undertake targeted investigations and works to address the immediate environmental risks posed on Styx Creek by the site.
  • To develop and then implement (subject to necessary approvals) an initial remedial action plan (RAP – Stage 1) with the intent to remediate material on the site that is known to be contaminated, has been assessed as required remediation, and for which no additional investigation works are required.
  • In parallel with the works specified above, to undertake additional investigation and feasibility assessment work at the site to provide information required to produce a subsequent remediation action plan (RAP – Stage 2), which will address any remaining contamination at the site that is assessed as requiring remediation, where the nature and extent of that contamination is not fully understood, as at the date of this proposal.”

June 2014

Elgas LPG gas storage facility located in the southern portion of the site is removed.

August 2014

Jemena submit RAP – Stage 1 for approval by the site auditor and EPA for approval on 31 August 2014.

Sept 2014

EPA and site auditor approve RAP – Stage 1.

November 2014

Enviropacific Services undertake a solidification/stabilisation treatment trial for tar impacted material at the site. The main purpose of this assessment was to demonstrate that ex-situ solidification/ stabilisation technology can be applied to the site.

November 2014

On 6 November 2014, Jemena notify Newcastle City Council of the pending commencement of Stage 1 remediation works at the site in December 2014, as per RAP – Stage 1. The Stage 1 remediation works are limited to remediation works that fall within the definition of Category 2 remediation works as defined by the NSW State Environmental Planning Policy No 55 – Remediation of Land and therefore do not require development consent.

December 2014

On 10 December 2014, Newcastle City Council confirms that the Stage 1 remediation works can be carried out as Category 2 remediation works without development consent.

December 2014

Stage 1 remediation works commence 15 December 2014.

February 2015

Stage 1 remediation works temporarily suspended at site due to an internal operational review.

30 June 2015

Jemena lodge application to Minister for Planning & Environment for the project to be ‘called-in’ as a State Significant Development project.

August 2015

Jemena re-notify Newcastle City Council of the recommencement of the Stage 1 remediation works.

August 2015

Stage 1 remediation works recommence at the site.

October 2015

Minister for Planning declares the remediation project a ‘State Significant Development’ (SSD) under the Environmental Planning and Assessment Act.

December 2015

Stage 1 remediation works complete.

December 2015

Management Order (MO) issued by the EPA on 21 December 2015 imposing timeframes for site assessment activities and the main remediation works.

May 2016

Preliminary Environmental Assessment (PEA) submitted to the Department of Planning & Environment (DP&E).

June 2016

On 15 June 2016 the DP&E chaired a planning focus meeting with the relevant agencies, Jemena, and its consultants.

June 2016

Stage 2 RAP submitted to EPA on 30 June 2016.

September 2016

DP&E issues Secretary’s Environmental Assessment Requirements (SEARs).

October 2016

Jemena asks EPA and DP&E whether some work could be done ahead of the SSD approval.

December 2016

DP&E confirms all work is required to be done as part of the SSD approval process.

February 2017

Jemena’s consultant JBS&G starts work on a revised Stage 2 RAP addressing the SEARs and especially the requirement to include future land use.

October 2017

Revised Stage 2 RAP submitted to EPA-accredited Site Auditor for review and endorsement.

November 2017  

Revised Stage 2 RAP submitted to the EPA for approval.

March 2018

EPA’s review of RAP completed.

March 2018

Jemena continues writing the Environmental Impact Statement (EIS) ahead of submission to DP&E.

June 2018

Contract awarded to Remediation Contractor, detailed design commences.

August 2018

EIS completed and goes on public exhibition

September 2018

Response to submissions to the EIS.

July 2019 Project Approved by the Minister for Planning
July-Sept 2019 Obtain post-approvals and prepare environmental management plans as required.
Sept 2019 Stage 2 remediation works commence.
August 2020 Remediation works complete.
March 2021 Minor works & maintenance completed
April 2021 EPA Site Auditor Report and Section B4 Sie Audit Statement received indicating compliance with MO.