Client: Cala Homes (South Home Counties)
Nature of works: Soil Remediation & Enabling Works
Contract Value: £1.86m
Soilfix were instructed to carry out extensive soil remediation and site enabling works at the former GSK research & manufacturing facility
An extensive history of site investigation works identified the widespread presence of trace asbestos fibres and PAH’s across the site within varying thicknesses of Made Ground. Remediation works were required in order to address planning conditions pertinent for unlocking this brownfield site for residential redevelopment. However, finished development levels necessitated a significant reduced-level excavation to be carried out, potentially resulting in >6,000 HGV movements onto the local highways and risk the scheme becoming commercially unviable.
A detailed Remediation Strategy & Method Statement was formulated by Soilfix to satisfy a pre-commencement condition, primarily based upon a clean capping ’Inversion’ based approach to achieve required finished levels with a layer of clean subsoil across all external areas and roadways. Processed Made Ground was utilised to backfill excavated voids and construct ’Hybrid’ Pile mats using stabilised fill. Works included:
Soilfix successfully achieved all objectives for the project (including phased handover to CALA) ahead of a 40-week programme with zero lost-time accidents. An effective materials management strategy compliant with CL:AIRE Code of Practice achieved significant cost savings on disposal off-site, whilst significantly reducing the number of HGV lorry movements.
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