Contaminated Ground Remediation

Frews are experts in contaminated ground remediation ranging from low level heavy metals to heavy contaminated asbestos soil remediation. Below is a couple of examples.

Christchurch Southern Motorway Stage 2 (CSM2)

Frews were subcontracted onto the CSM2 project in January 2017 and since then have removed several thousand tonnes of contaminated material from multiple sites along the motorway corridor. Throughout the course of this project Frews have demonstrated our ability to manage contaminated material in a range of scenarios, from bulk removal of contaminated stockpiles, to excavating and removing historical landfills and asbestos pipelines.

Due to the uncertainty at times around conditions and possible contaminants, work was sometimes of a reactive and adaptive nature. Frews allocated additional resources when new or unexpected contamination was discovered, to maintain pre-programmed deadlines. The complex nature of the work and the specific requirements for both handling and disposal of the different contaminant types necessitated detailed site management plans and careful implementation. In addition to bulk earthworks, Frews also provided transport, material screening, demolition works and skilled staff.

This project has included many challenges including traffic management requirements, difficult access to sites, complex site conditions and coordinating with multiple stakeholders including other contractors, property owners and environmental specialists.

Health and safety is a priority on all projects but it is critical to be managed well on projects of this magnitude. A record of zero injuries for Frews staff on this project is evidence of a robust health and safety system with commitment from highly trained and motivated staff.


Redwood Fire Station

Frews were contracted to provide remediation and siteworks for the new Redwood Fire Station.

The works required the removal of asbestos from the buildings prior to demolition. Historic asbestos contamination in the soil was removed as well as arsenic contamination before the siteworks began.

A large shelterbelt was removed from the roadside to enable the installation of new reticulation systems.

Frews provided expert staff to remove the shelterbelt efficiently, minimising disruption to traffic. Qualified staff were made available during the holiday period to progress the demolition and asbestos remediation works, enabling the early commencement of bulk earthworks.