A major landfill site in Scotland has been covered over and restored in a £16m project completed by Sita UK.
Sita installed an impermeable cap to seal the Ness landfill site and prevent rainwater from percolating through the waste where it would pick up contaminants and pollute groundwater.
Capping the site has also controlled the escape of landfill gas. This gas is now being collected to determine whether it can be used to generate electricity.
Aberdeen City Council appointed Sita UK to prevent the site from becoming an environmental hazard in 2000. The project was developed with the Scottish Environment Protection Agency (Sepa) and put into place in 2009 after six years of testing to assess pollution. The council believes it to be the largest restoration project in Scotland.
Approximately three million tonnes of waste from local homes and businesses was disposed of on the site over 30 years.
Much of this waste was deposited uncontained, causing the pollution of groundwater and the local coastline. Odorous landfill gas also escaped in breach of the sites environmental obligations, according to Sita UK.
The restoration involved landscaping and new pathways.
Sita UK Regional Engineering Manager, Edwin Farr added: “The systems we have installed along with the monitoring now in place, means that the site should no longer present a danger to the local environment.”