General Hospital, Southampton

POSTED ON: 02/11/2021

RML carried out a Ground Investigation at Southampton General Hospital for the NHS foundation trust to inform the design of a proposed two-storey bridge link between a new extension and the main Hospital building.

Walkover Survey

A walkover survey was carried out by an RML Engineer to establish if contamination is present from any undocumented practice or industrial use of the land and surrounding land and if necessary to confirm the accuracy of the information obtained from elsewhere as part of the Preliminary Risk Assessment (PRA) data gathering process . A visual assessment of the land to check for signs of industrial activity, landfilling, fly tipping , fuel storage, fuel tanks, asbestos related materials or any land contamination was undertaken and a photographic record made to provide evidence to show the condition of the land at the time of the Walkover Survey.

Phase 1 Environmental Risk Assessment

Environmental data, comprising geo-environmental hazards, hydrology and hydrogeology, was obtained for the current site covering an area of up to 1000m from the site boundary.

Historical Maps

Historical Ordnance Survey maps were also obtained for the site, as part of the PRA data gathering process. These maps were used to inform of potential historical contaminative processes.

Site Works

2 No. Cable Percussion boreholes up to 25m depth were undertaken at the site. Monitoring installations were subsequently fitted within the boreholes to facilitate land-borne gas monitoring.

Laboratory Testing

Particle size distribution, pH & sulphate tests, chemical analysis, asbestos identification, waste acceptance criteria (WAC) tests were undertaken for the project.