We delivered this project as a partner relationship with Goulburn Mulwaree Council and supported them over a three-year period through design, construction, commissioning, and then ongoing support.

The full scope of our involvement in the project included the following services:

  • Options investigation – to review the concept design and identify a best for project treatment option
  • Stakeholder liaison – with the EPA, DPIE and the previous Sydney Catchment Authority to provide technical justification and reach agreement on the recommended upgrade option
  • Membrane procurement – which included membrane supply specification development and procurement management on GMC’s behalf
  • Detailed design – including process, hydraulic, civil, mechanical and electrical design for the plant, including membrane integration
  • Tender documentation – development of comprehensive tender documents followed by tender phase technical support
  • Construction assistance – during the construction phase we undertook technical discipline site inspections at key points of the construction, contractor design reviews, and performed the superintendent’s representative site role
  • Commissioning – We managed the commissioning phase to ensure the plant met its licence conditions. During commissioning we provided hands-on training to operations staff to provide a smooth handover

The project delivered significant achievements across a broad spectrum of areas:

  • Capital and whole of life savings – through challenging the concept design our team realised a 17% and 11% saving in capital and lifecycle cost, respectively. The detailed design and construction contracts were both delivered under GMC’s budget expectations
  • Improved environmental outcomes – in adopting our design there was a reduction in the order of 85% and 97% of nitrogen and phosphorus loads in the effluent compared with the existing plant, and allowed GMC to shutdown the overloaded irrigation farm. Improved protozoa removal levels of the treated effluent discharging into the Wollondilly River (which feeds the Sydney Catchment) addressed a key concern of SCA
  • Adaptive planning – a design for the future providing a lower cost next upgrade and a platform to expand regional effluent re-use