Waverley Council needed a compliant washdown bay at its works depot to clean a mixed fleet, from heavy waste collection trucks to small mowers. The bay had to handle frequent vehicle movements and meet Sydney Water trade wastewater discharge requirements and environmental standards.
Washbay Specialists designed and built a 13.5 m × 15 m bunded concrete wash slab, pinned to the existing floor slab and fitted with flexible PVC side curtains to contain overspray. The trade wastewater treatment system comprises a 1,200 L underground silt trap, a 3,000 L balance tank and a 1,500 L/hr oil/water separator, sized to achieve discharge levels of ≤100 ppm. The scope also included demolition of the existing wash bay, backflow prevention, electrical works and training for depot staff.
The depot now has a turnkey washdown facility that contains wash water on the slab and treats it before discharge, removing the contamination risk and simplifying fleet cleaning. Built to Sydney Water requirements by an ISO 9001 and ISO 45001 certified contractor, the facility gives Council a compliant, durable wash point for its full fleet.
