3e worked with Aldi Stores Ltd on the £800,000 extension of their store in Cockermouth. The project involved extensions of the store retail space and the existing car parking over the area of the adjacent former petrol filling station. The site required a remediation exercise of hydrocarbon contaminated groundwater, threatening the nearby River Derwent within 20 metres of the site boundary.
3e Consulting Engineers carried out a geo-environmental investigation at an early stage that identified hydrocarbon contamination of groundwater requiring treatment prior to development. 3e Consulting Engineers discussed the contamination issues with the Environment Agency and local authority environmental health officer and negotiated site-specific remedial target values to provide a robust, cost effective solution for Aldi.
The remediation works were carried out by Geo2 Remediation for Aldi and overseen by 3e Consulting Engineers. The remediation involved the prevention of contaminated groundwater migrating towards the river during remediation by the installation of boundary abstraction wells and treatment plant, removal of the underground fuel tanks and pipework, chemical oxidation of the groundwater with ongoing pumping and ex situ treatment for three month following the removal of the underground tanks.
3e Consulting Engineers have also designed the structures, drainage and car parks for the development.