This project involved undertaking preliminary risk assessments and technical due diligence assessments of 40 sites in Wirral Northside, Hamilton Park and Dock Branch Park, forming part of a major urban regeneration initiative for the Wirral Peninsula.   

Our input involved collaboration between our Land Quality, Geotechnical and GIS teams, to provide preliminary risk assessments and an abnormal costs appraisal for the demolition, clearance and remediation of an array of brownfield sites, including former landfills, power stations, engineering works and gas works. This process has been enhanced by a portfolio of in-house geospatial analysis, considering environmental constraints, LiDAR elevation, geology, and historical gasworks plans courtesy of the National Grid Archive.

Sites have been taken forward for intrusive ground investigation works comprising trial pits, cable percussive boreholes, installations for ground gas and groundwater monitoring, and geoenvironmental and geotechnical testing. Sites of particular interest include:  

• Lime Kiln Lane, historically occupied by an electricity generating station, and bounded to the east by the former site of the Wallasey Gas Works.
• Wirral Council Depot, historically occupied by a steel rolling mill.
• Oakdale Road, historically occupied by a former landfill and tannery lagoon for British Leather.

The accompanying Phase 2 Geoenvironmental and Geotechnical Generic Quantitative Risk Assessment determined the risk of contamination to human health and controlled waters receptors from the identified contamination sources and pathways at each individual site.