Enviropacific completes treatment of lead-impacted site

URS engaged Enviropacific when it needed to undertake chemical immobilisation treatment of 700 m³ of lead contaminated soil on its site in Alexandria, NSW.

The project included the collection of samples, completion of treatment trials and preparation of an application to EPA for a Specific Immobilisation Approval (SIA). Enviropacific was required to relocate contaminated soil, classified as hazardous and restricted solid waste (maximum leachable concentration >70 mg/L), from beneath a suspended slab and from within the building located on-site.

The work included: screening of contaminated soil to remove oversize (>100 mm) material prior to treatment; on-site chemical immobilisation of lead-impacted soil to reduce the waste classification to General Solid Waste; conformance sampling to ensure that the material met the requirements of the SIA; and transport and disposal of the validated material as general solid waste (maximum leachable concentration 0.07 mg/L) to an EPA licensed landfill.

The works were completed on time and all conformance sampling met the disposal criteria.