SciDev was approached to treat contaminated surface water at the future site of the Stabling and Maintenance Yard for Parramatta Light Rail. The 6.2-hectare site at Camellia will be used to maintain and house light rail vehicles and a control centre to operate the new light rail system.
Treatment works were carried out to support remediation of the site which had a legacy of chromium contamination from past industrial processes.
SciDev designed, constructed, and operated a temporary water treatment plant (TWTP) that removed hexavalent chromium and other metals from the surface water on sitedown to a non-detect limit of reporting and discharged the water to sewer in accordance with the client’s trade waste agreement.
Summary
The temporary water treatment plant treated over 39ML of water contaminated with total chromium levels as high 4.2mg/L and hexavalent chromium as high as 2.46mg/L. The TWTP generated 6m3 of restricted solid waste (RSW), equating to 0.0154% of the total volume processed. This waste was sent to an appropriately licensed landfill and no waste required thermal treatment.
Discharge to trade waster below the limit of reporting: total hexavalent chromium <0.001mg/L.
