Unexploded Ordnance

The discovery of unexploded ordnance (UXO/EOD) on a development site is a cause for great concern. Apart from the obvious worry of injury to personnel, there is also the risk of damage to plants, structures, neighbours and reputation.

The potential costs could be substantial and the risk therefore needs to be assessed and mitigated as soon as possible.

The Three Stage SUMO Approach

1. Qualify the risk

A Desk Based Assessment (DBA) should be carried out to research the site history, in advance of contacting SUMO. 

2. Carry out a non-invasive site investigation

Should the DBA indicate the potential for UXO, a programme of on-site non-invasive investigation is carried out using geophysical survey techniques.

3. Unexploded ordnance monitoring, clearance and disposal

If found, UXO is cleared in conjunction with our partner Ramora, including emergency attendance if necessary.

All our surveys comply with CIRIA Guidelines


Case study

Andover Business Park on the site of the WWI Andover Airfield

SUMO carried out a magnetometer survey over an area of 50ha on an old airfield. The survey revealed several prehistoric ring ditches and a marked cluster of magnetic debris covering a circular area of a 200m diameter. Upon investigation this proved to be numerous small RFC ordnance which the RAF bomb disposal squad investigation proved were practice devices and not armed. All the devices that were discovered were removed and disposed of. It is likely that the ordnance were being used for practicing bombing raids on enemy trenches during WWI.