WALO UK LINES LARGEST CELL AT WESTMILL LANDFILL SITE
We are now lining the 11th cell at Westmill Landfill site in Hertfordshire using Dense Asphaltic Concrete (DAC). This is the largest of the cells we have lined at Westmill since 2003 and once completed, the site, operated by Biffa Waste Services Ltd, will have an overall storage capacity of around 2.5 million cubic metres.
The area to be lined in Westmill’s 11th cell, with over 13,000 tonnes of asphalt, consists of a basal surface area of 18,400 sq. m, with slopes of 9,300 sq. m. The longest slope length to be lined measures 60 m with an incline of 1:2. WALO UK is also constructing intercell bunds, measuring two metres high, into adjacent existing asphalt lined cells, which will cover an area of 3,600 sq. m., again with a slope incline of 1:2.
The lining system itself has been formulated in our Zurich laboratory to a design mix specific to this project. Once the lining works are completed, a leachate collection and removal system will be installed.