500 million

Litres of water treated


Contractual Criteria success rate


EPL listed contaminants

Client Lendlease Building Pty Limited
Location Barangaroo | NSW
Value $22m
Timeline Jan 2011 - Dec 2015

Synergy provided groundwater extraction, excavation, dewatering, surface stormwater collection, water treatment, sludge dewatering, immobilisation, waste management and various remediation services for the Barangaroo redevelopment site.

Barangaroo was Australia’s first gasworks providing Sydney’s electricity supply between 1839 and 1928. After it was decommissioned the area was used as a commercial wharf built on reclaimed land using landfill.

As a consequence, the soil and groundwater on the site contained 40 EPL listed contaminants in concentrations which are hazardous to human and aquatic life.

Synergy designed, constructed and operated a multi-barrier Water Treatment Plant (WTP) to treat contaminated water and manage sludge associated with redevelopment of the site. Synergy’s treatment process addressed all contaminants listed in the EPL and treated over 500 million litres of recovered water in a continuous process prior to discharge into Darling Harbour