Project overview
We were commissioned to carry out a site investigation for an 11kV switchboard replacement in Hertfordshire. The scope included foundation design recommendations and a risk assessment for human health due to potential contamination from poly-chlorinated biphenyls (PCBs), commonly associated with electrical substations and transformer cooling fluids.
Our approach
- Conducted geotechnical investigations to assess foundation options.
- Evaluated soil contamination levels, specifically for PCBs, and assessed associated risks to human health from contact, inhalation, or ingestion.
Findings and recommendations
- Foundation design: Shallow foundations were deemed suitable for the development, eliminating the need for costlier deep piling options and delivering significant savings for the client.
- Contamination mitigation: PCB contamination was identified in the soils. However, through a detailed risk assessment, we demonstrated that implementing appropriate mitigation measures would minimise risks to human health.
Outcome
Our findings and recommendations supported a cost-effective and safe development process, ensuring compliance with health and safety standards.
Key details
- Client: Freedom Group of Companies
- Cost: Not disclosed
For more details on the redevelopment project, visit: [Link]
Our efficient and detailed investigation provided the client with practical solutions, balancing safety and cost efficiency for this critical infrastructure upgrade.