Location
Aylesford, Kent
Sector
Commercial
No further contaminated-land investigation was required.
No further SI
Contamination, drainage and pavement covered in one investigation.
3 workstreams
01
The uncertainty
An existing building was to be demolished and replaced with a car park. Contaminated-land risk, drainage feasibility and subgrade strength were all unknown, and each was holding up a different part of the design team.
02
What we established
No soil exceedances against commercial criteria and Low risk overall. Infiltration rates showed soakaways were feasible.
03
What changed
The civils team could progress soakaway and pavement design straight away, with contaminated land closed out subject to a standard discovery strategy.
04
What was avoided
Any further contaminated-land investigation, and separate mobilisations for each design workstream.
05
How we got there
- 3 windowless sampler boreholes and 3 trial pits across the footprint
- Soil and leachate testing
- BRE 365 infiltration testing in three pits
- 5 DCP tests for pavement design
- Two groundwater monitoring visits
About the author
Director
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Services on this project
Phase 2 Site Investigation, BRE 365 Soakaway Testing
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