The primary objective of the soil remediation works was to reduce risks to environmental and human receptors to acceptable levels and SLP formulated an Environmental Remediation Strategy for the site that comprised of i) the controlled excavation of the contaminated material, ii) the ex-situ stabilization of the contaminated material to reduce contaminant mobility, iii) the disposal of the stabilized material to a licensed hazardous waste landfill, and iv) the backfilling of the excavation void with clean imported materials.

Following the excavation of the contaminated materials the base of the remediation excavation was subject to sampling and rapid turnaround chemical testing to verify that the residual contaminant concentrations were below the Remediation Target Values (RTVs) developed for the Project. Any area recording exceedances of the project RTVs were subject to further localised excavation and retesting until compliance with the Project RTVs was achieved. Once it was verified by SLP that the residual contaminant concentrations were below the project RTVs the excavated soils were replaced with a chemically acceptable granular fill material which was then compacted to a suitable standard to enable continued current operations at the facility.

The contaminated soils were stabilized with proprietary stabilizing agents and transported to a licensed hazardous waste landfill for final disposal. A cradle to grave waste transfer manifest regime was strictly implemented and monitored during the works and SLP Environmental produced a detailed Remediation Validation Report for the project that detailed the works that were undertaken and presented the supporting documentation and data to verify that the site had been successfully remediated and no longer presented a risk to environmental and/or human receptors.