Stewart Milne appointed McAuliffe to unlock this heavily zinc-contaminated site (zinc up to 52,000mg/kg), ready for a development of 265 new homes. The site had been derelict for five years, largely due to lack of site investigation data, resulting in a limited remediation options appraisal.
McAuliffe took a technology-led approach to unlocking this site, using our intelligent equipment and engineering capabilities to conduct precise sampling and reduce the predicted contamination zone by 50%. Zinc-contaminated soils were stabilised to a 125ug/l leachate target, enabling safe reuse of 29,439m2 material. As ever, McAuliffe enjoyed an exceptional health and safety record on this project.
We designed and delivered a cost-effective, compliant methodology that made the site viable for development, reusing 99.88% of material that would otherwise have gone to landfill. Stewart Milne was so impressed with our team, it named McAuliffe āBest New Contractorā at its supplier awards.
| Client | Stewart Milne Homes |
| Site Area | 15ha |
| Time Frame | 6 Months |
| Location | Roften, near Ellesmere Port |
This project received a Highly Commended award in the Best Re-use of Materials category at the Brownfield Awards 2019 for sustainable and compliant materials management under the CL:AIRE DoW CoP.
Our team delineated the site using a computer-generated grid for precise sampling. The grid was then uploaded onto a digital terrain model of the site, which was viewable on the in-cab display of our 3D GPS-enabled excavators. This clearly marked out known zinc-hotspot locations and depths for machine operators.
Through 3D Site Link software, our intelligent excavators recorded each material movement in real-time, providing detailed records for verification.
We found the entire McAuliffe team to be very professional and always looking to offer alternative solutions which would benefit us.
