UNEXPLODED ORDNANCE (SEPARATING FACT FROM FICTION) Mike Sainsbury, Managing Director 21 June 2017 1
ZETICA WHO ARE WE? Who are Zetica Mapping hazards UXO Risk assessment/desk studies Detection Investigation (EOC) Who is the Special sites & situations Single source Trusted Suppliers (e.g. RPAs) 21 June 2017 2
WHY HERE TODAY? Unexploded Ordnance (UXO)- Addressing the hazards for developments Process Risk assessment Detection Risk mitigation Disposal (Ramora) Addressing Inconsistencies in approach Exaggeration Rumour, hearsay, scaremongering Available guidance Integrated surveys (two birds one stone) 21 June 2017 3
SO WHAT IS THE RISK Sources of UXO today in UK Rich in military history. Forces related. Manufacture/testing. Strategically important locations. Often attacked. Heavily defended. Known and uncharted UXO & UXB from local military activities and enemy activities. 21 June 2017 4
SOURCES OF UNEXPLODED ORDNANCE WWII (& WWI) bombing Strategic targets Clydeside, ROFs Dense in parts UK abandoned bomb register. 21 June 2017 5
SOURCES OF UNEXPLODED ORDNANCE Military activity Temporary camps (British & others) Home Guard/Auxiliary Units Ad hoc training rural area Ranges
SOURCES OF UNEXPLODED ORDNANCE Military activity (cont) Barracks Airfields Navy
SOURCES OF UNEXPLODED ORDNANCE Munitions manufacturing & handling Testing Storage Disposal areas
POTENTIAL UXO HAZARD SOURCES OFFSHORE Offshore bombing (convoys/jettisoning) Munitions disposal areas Ranges Gun batteries Mines (buoyant and seabed) Military wrecks Aircraft crashes Torpedoes UXO migration (storms/tidal action)
SO WHAT IS THE RISK Risk Today Many found Left alone/disturbed Planned development - Key is good desk study & risk assessment 21 June 2017 10
RISK ASSESSMENT Recommended practice UK Guidance for UXO assessments and mitigation CIRIA, IExpE, Crown Estates Doesn't need an UXO expert throughout Preliminary assessments (you) UXB maps, internet. Caution for rural areas, bomb maps (showing hits), databases. Pre-desk study assessments. Detailed assessments (UXO specialist) Thorough detailed research Site specific including archive visits Clear objective assessment and advice Provide an understanding of the hazard, risk and how to mitigate it. 21 June 2017 11
RISK ASSESSMENT Risk assessment (Desk study) Critical to understanding risk & ensuring appropriate risk mitigation. Critical to get it right. Sufficient detail Spending time (money) now will save more time/ (money) later Understanding the information available Completeness Corroborative Correct sources (Known UXB) 21 June 2017 12
MITIGATING THE RISK Detection, what are the issues? Depth Depth of ordnance Depth of work/risk Type of ordnance Size Ferrous? Confidence required Safety 21 June 2017 13
MITIGATING THE RISK Depth of detection & noise Many companies Many approaches Differing equipment Law of physics doesn t vary 21 June 2017 14
MITIGATING THE RISK Typical UXB detection depths from surface 50kg ~ 2.0m 250kg+ ~ 5.0m Proved at our Test Site Failure to understand issue of geophysical noise 21 June 2017 15
MITIGATING THE RISK Advantages of approach with various methods/resolution Magnetic or Electromagnetic Ferrous / Non-Ferrous Resolution Size and depth of target Combination/Phasing More discrimination Gross contamination 21 June 2017 16
MITIGATING THE RISK Phase 1(a) Phase 1(b) Phase 2 Magnetics (left), EM61 trolley (middle), EM61 HH (right) Increasing resolution 21 June 2017 17
MITIGATING THE RISK (INTEGRATED SURVEY) While detecting UXO Buried waste/infilled ground Buried obstructions Archaeology Geology and Groundwater Utility Services Reducing Management time/cost Survey costs Impact on site/community Improving Survey effectiveness Understanding 21 June 2017 18
MITIGATING THE RISK Assurance Detection assurance Geophysical prove-out 21 June 2017 19
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MITIGATING THE RISK EOD (Explosive Ordnance Disposal) UK situation Commercial solution Reasonable foresee Regulation (poor) Licencing Guidance 21 June 2017 23
MITIGATING THE RISK Advantages Commercial awareness Enhanced safety Less disruption Quicker/better timing Smaller exclusion zones 21 June 2017 24
MITIGATING THE RISK Northstowe New Town Previous bombs created significant disruption Evacuation days/whole town RA/DS identified more could be found in one area. Survey identified 11 targets (3 high probability) 3No. 500lb bombs found Evacuation none! 21 June 2017 25
MITIGATING THE RISK Advantages Commercial awareness Enhanced safety Less disruption Quicker/better timing Smaller exclusion zones 21 June 2017 26
CONCLUSION Importance of detailed risk assessment Appropriate and understood detection Appropriate risk mitigation for the hazard Benefits of integrated surveys Have confidence to ask probing question about:- Appropriate risk evaluation? Appropriate measures to mitigate the risk? Can the residual risk be proven? 21 June 2017 27
MITIGATING THE RISK Wealth of guidance and resources can be found at.com Over to Dave Welch of Ramora 21 June 2017 28