Engineering expertise was provided on the sustainable community in Surrey, which saw the site of a former quarry transformed into a new parkland development.
The £300m scheme consists of over 1000 homes, half of which are affordable, making it the largest development in the history of Elmbridge Borough Council. Plans for the site also include a new primary school as well as a medical centre, local supermarket, a pub and office space. Over 70 acres of the site will be allocated as a new riverside park which will include a five-acre lake, skate park, football pitch and children’s play areas.
Transportation and highways engineering services were provided to support the successful planning application for the development, as well as air quality and noise expertise. We are also coordinating the work of other members of the technical team, including an ecologist and arboriculturalist.
Due to the history of the site, Patrick Parsons’ geoenvironmental team have also completed extensive ground investigation works, which included a desk based geoenvironmental appraisal of the site that indicated sand and gravel quarrying between 1950s and 1990s with concurrent and latter (uncontrolled) landfilling. Targeted ground investigation addressed potential soil and groundwater contamination sources, as well as geotechnical constraints and risks from ground gases. The presence of unforeseen contamination necessitated a reactive approach by site personnel in order to achieve the aims of the ground investigation
Remedial proposals included a combined enabling earthworks and remediation scheme with provision of a 750mm clean capping layer in areas of soft landscaping and raising of site levels by 500mm to mitigate flooding. Further groundwater monitoring and a Detailed Quantitative Risk Assessment (DQRA) together with extended ground gas monitoring is proposed to better understand long term risks.