Today we woke up to reports of a huge unexploded World War II bomb
being identified at a building site in Southwark, south London.
With households within the vicinity evacuated while the Army manages the safe
removal of the device, it highlights the importance of undertaking Unexploded
Ordnance (UXO) assessments at the outset of any building development works, as the
probability of identifying UXO originating from the Second World War might not
be as uncommon as you think.
According to the Construction Industry Research and Information
Association (CIRIA), between 2006 and 2009, approximately 15,000 devices were
removed from construction sites – of which 5% were live.
Add to this, it has been reported that during WWII over 17,000 tonnes of
explosive fell on London alone, with figures suggesting that approximately 10%
did not detonate on impact.
Site Assessments:
Help is available to the construction industry: the first port of call
is a desktop tool called a Preliminary
UXO Risk Assessment. It quickly provides a 'yes/no' answer as to whether
there is any risk of encountering a bomb. It has been developed in line with
guidance from CIRIA and endorsed by the Health and Safety Executive.
If a positive ‘yes’ output is identified, the next stage of assessment
is to conduct a Detailed UXO Risk
Assessment. This will detail the type of threat, the size, origin and also
takes into account the proposed construction method and how that would impact
on risk of detonation. Risk mitigation
measures are then provided to allow construction to proceed.
The ‘Bomb Search’ assessments are available from Envirocheck, part of
Landmark Information Group, and are provided by renowned experts in the field
of UXO, 6 Alpha Associates.
Talking about the potential risks, Simon Cooke, Managing Director at 6
Alpha Associates, in partnership with Landmark Information Group, said:
“Encountering an unexploded bomb
on a construction site is a low probability but extremely high consequence
event, particularly when you take into account potential loss of life. Not to
mention shock waves which could spread underground for some distance, causing
damage to foundations and other underground works. As we
see it, it is the potential consequence, rather than the probability, which
really drives the importance of undertaking detailed risk assessments before
any work starts.”
Ultimately, at the start of any new ground works project, the first
stage Preliminary search is a must. While the potential risk may be considered
small, it is clear it should not be overlooked for the ultimate safety of all
concerned.
More details regarding
Envirocheck Bomb Search can be found here:
More details regarding 6 Alpha
can be found here:
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