Kogarah Council- Council Depot, Stormwater Harvesting Design, Construction & Commissioning

Optimal Stormwater won the design and construction of a reasonably small harvesting system for the Kogarah Council depot at Carlton.
A previous harvesting system was in place on a Sydney Water channel nearby, and Optimal Stormwater was selected to upgrade the offtake works which included upgrading the existing drop grate offtake, plan a new rising main to get this water to the Council depot, install a new treatment and disinfection system, and store the water in new elevated polymer tanks. Harvested water is to be used for high pressure washing of garbage trucks, put tankered away for remote irrigation of median strips, parks and gardens. The water was desired to have a 0.5mg/L chlorine residual, so a sodium hypochlorite dosing system was used for the disinfection and Optimal Stormwater has now added chlorine disinfection to our capabilities.

All the treatment and storage works had to fit within the existing Council depot and cause minimal disruption to existing activities. The construction was priced to suit Council’s available budget and re-used a lot of existing infrastructure. Construction was finalised in 2016.