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Stage 1:

Preliminary UXO Risk Assessment

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There is a very low likelihood of encountering buried explosive ordnance / unexploded ordnance (UXO) at the majority of UK sites. The first step in the risk management process - Stage 1 Preliminary Risk Assessment (PRA) - is the ideal way to quickly identify a low risk and avoid further action at additional cost. 

The main objective of a PRA is to confirm whether or not further research is required to verify the risk. If a low risk cannot be concluded at Stage 1, a Stage 2 Detailed Risk Assessment (DRA) will be recommended. 

Our PRA service is a desktop study service. Every bespoke PRA is researched and written by an experienced risk analyst. We do not use online tools to automatically generate partially site-specific reports. 

The availability of historical records will differ depending on the site's location. As an absolute minimum, all our PRAs involve analysis of:

  • Aerial photography

  • Historic OS mapping

  • Local WW2 bombing density 

  • WW1 air raid records 

  • Our PIEO (potential indicators of explosive ordnance) GIS map. PIEO plots our vast database, the result of over a decade of research.

In accordance with CIRIA C681 / C785 guidelines, our PRAs consider the following:

  • The Site: location, history and occupancy

  • Wartime UXO: enemy action (German bombing and shelling) and British anti-aircraft artillery fire

  • Domestic Military Activity: British and Allied armed forces activity, both wartime and peacetime

  • Mitigating Factors: previous ground works and explosive ordnance clearance (EOC) tasks

  • Proposed Works: the degree of planned soil disturbance 

Standard Delivery: 24 - 48 hours from order confirmation 

Standard Fee: £130* + VAT

*Non-standard fees are also available. 

For extremely large sites, multiple sites, or if you have a very tight time-frame, get in touch and we will be happy to discuss your specific requirement. 

Can I see an example PRA before I order one?

Of course. Your free sample PRA is available on request. 

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