The original gasworks operated between 1879 and 1970, and the historical operations contaminated soil and groundwater at the site. The remediation involved the ex-situ stabilisation and treatment of around 8,000m3 of contaminated soil.

Works began at the site in November 2018 with all remediation work completed in late 2019. All remaining environmental investigations were completed successfully with the independent Site Auditor issuing the Site Audit Statement for the former gasworks confirming the remediation was successfully completed.

AnewX was engaged by EnviroPacific to undertake design and construct foundation works including the permanent low permeability secant pile cutoff wall, CFA piles to protect buildings of heritage significance and the temporary staged sheet pile box design and construct to enable removal, treatment and replacement of contaminated ground at the old gas works site.

An innovative feature of the sheet pile design was the provision of an external steel capping waler with associated adjustable props. This feature ensured the excavator could access all of the soil against the sheet pile for treatment.


Goulburn NSW

Services applied


  • Complete design construct package for both temporary and permanent retaining structures
  • Permeability assessments and recommendations for the work.
  • Design for external waler system to improve production in the cell remediation excavation
  • Development and implementation of all safe work methods collaboratively with EnviroPacific to ensure the safety of the workforce and adjoining public.

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