TestSafe NSW engaged SciDev to dewater the dams, treat the contaminated water, dispose of the contaminated sediments, and upgrade the stormwater retention dams. Water treatment activities remain ongoing, as fire training exercises continue to be carried out on the site, and contaminated stormwater continues to be generated.
The Temporary Water Treatment Plant (TWTP) has been mobilised and commissioned five times in total to undertake water treatment activities on site. To date, the TWTP has treated and discharged 6.9 megalitres to the environment without the need for media replacement or disposal of waste generated.
- Design, construct, and commission a TWTP capable of treating up to 2.8L/s with continuous discharge to the environment via drip irrigation in accordance with our NSW Environmental Protection Agency license.
- The final retention dam was reshaped to increase the holding capacity from 209kL to 610kL. The dam was lined with high-density polyethylene (HDPE) liner to prevent leaching of the contaminated water.
- SciDev has now remediated and capped two of the original three secondary retention dams on-site, transporting and disposing of up to 438.5 tonnes of Restricted Solid Waste and 520.1 tonnes of General Solid Waste.
- The final retention dam was reshaped to increase the holding capacity from 209kL to 610kL and lined with a HDPE liner to prevent leaching of contaminated water.
- A concrete spillway was designed and constructed to allow for controlled overflow and to reduce erosion.
- The TWTP has treated and discharged 6.9 megalitres to the environment without the need for media replacement or disposal of waste generated.