1. Slide 1 A Carillion plc company

2. 30 th September 2008 SAFESPUR and Brownfield Risk Management Forum Radioactive vs Non-radioactive Contamination – Tools and Techniques Showcase Site Characterisation – Practical Experiences and Application on Nuclear Licensed Sites Pete Longley

3. Slide 3 A Carillion plc company Introduction Radioactive vs non-radioactive - what are the differences? What are the implications? Impacts on investigation design and execution.

4. Slide 4 A Carillion plc company Comparison Similarities: Like any other complex industrial site Stringent HS&E requirements Interactions with other site operations Non-radioactive contaminants Differences: Potential for radioactive contamination

5. Slide 5 A Carillion plc company Implications Management Issues: Preparation of project documentation (Health and Safety Plan, Method Statements and Risk Assessments). Allowance for HP monitoring Time for entry and exit in to controlled areas Plan for C2 working Consider release of samples

6. Slide 6 A Carillion plc company Implications Contamination control: Selection of clean drilling techniques Difficult to achieve with traditional methods (Shell and Auger, trial pitting etc) Consider open flush drilling system Employ conscientious drillers

7. Slide 7 A Carillion plc company Implications Waste minimisation: Identify potential waste streams Establish site waste disposal capability Use narrowest diameter drilling equipment possible to achieve a good borehole Use dry methods where ground conditions allow to reduce wet waste (dynamic sampling) Consider disposal of arisings and samples

8. Slide 8 A Carillion plc company Impacts on Design and Execution Selection of investigation techniques Impacts on programme Disposal of arisings Health and safety considerations