We undertook a desk study and risk assessment to support an application for a certificate of completion for a closed landfill site. A conceptual model of the site was developed on which a risk assessment model was based. This confirmed that the waste presented no pollution risk to the surrounding environment or harm to human health. The client benefited from our robust conceptualisation and risk assessment modelling which enabled a straightforward application to be made to the regulator and a rapid procedure of completion reporting for the specified cell.
The client had a number of former quarries in the project area that had later been permitted for use as landfill sites under the Waste Management Licence process. The sites were post-operational and had been restored to farmland and fisheries. Following a period of post-closure monitoring the client wished to surrender the Waste Management Licence for one area of the site and apply for a Certificate of Completion from the Environment Agency. This process requires an assessment to determine whether, as a result of waste disposal activities, the condition of the land still risks causing pollution of the environment or harm to human health.
We were asked to complete a review of the available information, provide a desk study and risk assessments, and submit completion documents to the Environment Agency for the surrender of the Waste Management Licence.
The scope of the work included an assessment of the geological, hydrological and hydrogeological context of the site and determining whether the fill and engineering of the landfill were producing any impact on the local and regional environment. The site was in the vicinity of a number of environmentally sensitive sites including Sites of Special Scientific Interest (SSSI), an Area of Outstanding Natural Beauty (AONB) and a Ramsar site for wetland protection.
We assessed the historical development of the landfill and the regional and local hydrogeological and hydrochemical data provided from various sources. The available data was used to develop a site-specific conceptual model. The conceptual model was in turn used to develop a risk assessment model to confirm that the waste deposited at the site presented no pollution risk to the surrounding environment.
Our client benefited from our robust conceptualisation and risk assessment modelling which enabled a straightforward application to be made to the regulator and a rapid procedure of completion reporting for the specified cell.