Case Study - Westrac
The Problem
Westrac underwent a significant services upgrade to their Mt Thorley maintenance centre in 2007. Redevelopment of their machinery wash area was subject to water restrictions forbidding the use of mains water for cleaning of machinery. This necessitated an alternative water source to be supplied to the site to keep up their 10,000L a day demand.
The Solution
Water Harvest Australia performed a water audit to analyse the various sources of water available in order to determine the optimal solution. Due to the toxicity of the on-site wastewater and groundwater, rainwater was the chosen source. Water Harvest Australia designed and installed a system to maximise the collection from the 6000m2 of roof area. A sophisticate filtration and control system was introduced to disinfect the water before being stored in two 250kL rainwater tanks.
The Outcome
The system proved large and efficient enough to make the wash pad self-sufficient for its water supply. An independent laboratory confirmed the filtration process produced a quality of water similar to that of mains water. Westrac now have a system that gives them a level of self sufficiency and will provide a financial payback over the 25 year life of the system.