Who:
The LK Group
What:
Windowless Sampling, Rotary Open Hole & Rotary Core Drilling (Contaminated Land)
Where:
Anglesey
How long:
20 weeks
Outcome:
Significantly reduced potential remediation costs
THE PROJECT
D&I Drilling were commissioned to drill the former Anglesey Aluminium site. It was essential that no cross contamination due to impacted soil and groundwater occurred during drilling, which could overestimate the risk and remediation costs. Previous work by others had identified a risk to deep groundwater for parts of the site.
THE SOLUTION
Shallow superficial and deeper bedrock was targeted by drilling using Windowless sample boreholes, open-hole rotary drilling and cored rotary drilling extending from between circa 5mbgl to 15mbgl. The casing was left in place where contamination was identified at high level, to prevent cross contamination to the materials below.
Additional constraints were identified relating to a live electrical substation; we implemented appropriate health and safety protocol.
Samples were collected, soils were logged and in-situ geotechnical materials characterisation tests were undertaken.
THE BENEFIT
We carried out a safe investigation without incidence. Water sampling demonstrated that deeper groundwater was not impacted in many areas of the site due to our use of sacrificial casing technique preventing cross contamination to deeper strata. The investigation reduced the requirements for deeper remediation of groundwater within the bedrock, significantly reducing costs for the client