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Posted By Luke.
I'm trying to build a semi-generic list for hazards associated with Excavations ..
So would appreciate your input please!
here is what i have off the top of my head.
Striking Buried Services
Mobile plant on site
People & Vehicles falling into Excavations
Materials falling onto people in Excavations
Slips and Trips
Vibration from power tools/plant
High noise levels
Dust
unstable ground
inflow of ground/surface water
undermining nearby structures
fumes / oxygen deficiency
Am i missing any glaringly obvious ones or can you add to this list?
Thanks in advance!
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Posted By Philip Roche
Contact with contaminated soil .
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Posted By Chris Smith RSP
Contact with overhead cables?
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Posted By Luke.
Thanks Phillip
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Posted By Chris Smith RSP
I feel left out :(
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Posted By GT
Luke,
Please don't leave Chris out in the cold - he did contribute! Thanks Chris
You may want to consider Access and Egress especially in emergency situations.
Regards GT
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Posted By Luke.
Hi Chris,
Sorry about that - posted the thanks at the exact time you posted yours .. so..
Thanks Chris!and Thanks GT!
(going to regret all this individual thanking!)
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Posted By GT
LUKE,
Types of soil I think there are 3 classes, Depth of excavation ( engineering design for shoring required below 20 feet I believe) and the location of the excavation in terms of other surrounding risks, where migration of any substances may be a danger.
Regards
GT
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Posted By Luke.
Thanks GT,
Been looking at Asphyxiation & Poisoning (i.e. Chalk/Limestone coming into contact with acidic water creating carbon dioxide, glauconitic sand oxidising, release of methane or hydrogen sulphide etc).
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Posted By Mike B
Luke,
Buried ordnance, anthrax, buried chemicals or other hazardous materials. Consideration should also be given to any plants growing in the soil which may be poisonous or invasive.
Mike
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Posted By Mark Eden
Luke
Have you considered the type of plant used to dig your hole such as semi automatic quick hitch devices that have just been banned from the Olympic Park site
If you have a lot of under ground services the use of the fairly new vacuum excavation system is worth looking into
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Posted By A Campbell
Don't rule out confined spaces??
Also consider rescue plan and/or first aid assessment
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Posted By ipaterson
Collapse of side of excavation - especially if the guys are working in the excavation - doesn't take much to suffocate a buried person especially if loose soil eg sand - shoring required from start depending on depth of excavation.
Irene
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Posted By Peter F.
The sides collapsing
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Posted By Luke.
Out of interest..
I have always carried out my risk assessments as detailing the hazard and then the risk (i.e. mobile plant on site; being struck by reversing/moving vehicles, bucket coming off excavator etc ...)
but someone has just asked the question...
can you just put "mobile plant on site" and not detail everything else... that way its more simple.
I'm not convinced that it's a good idea!
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Posted By philip john
Trespasser i.e. children playing in excavation (covering issues when not being used)
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Posted By Mike B
Better to list the likely hazards that might arise from the mobile plant. In the same way as it is better to list the various underground services as each of them can generate different hazards.
Couple of more unlikely ones for the list:
Abandoned mine workings, wells - which may have been abandoned and covered over (had one of them. Radon.
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Posted By Luke.
Thanks all..
Another one...
would you say its RP to use a temp barrier system around an open excavation if the barrier can be secured around 1.5-2 meteres from the edge of the excavation?
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Posted By justgossip
If you use a trench box they can be ordered with guard rails that fit the box
garry
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Posted By justgossip
Temp barrier, depends on the RA and time that the excavation is open.
some times I use portable barriers and on others I have used scaffold poles driven and tied in.
Or
As I saw on Ilford High street, moveable barriers.
The public moved them and jumped over the trench to cross the road.
garry
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Posted By claret65
(1)Position of petrol/diesel driven combustion engines i.e. generators,pumps, mobile lighting towers, etc. Location of these types of equipment ,in respect of position of excavation, could result in carbon monoxide build-up in the excavation. This hazard obviously introduced into the workplace by exhaust gases.
(2)Intrinsically designed task lighting to mitigate against any poor lighting in excavation, whilst providing some protection against explosive gases.
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Posted By Alan Nicholls
Luke
Have you considered the site itself. Is the site flat or an incline, is it more than one type of material,eg rock and soil.
What about disused septic tanks or disused filter beds.
Regards Alan
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Posted By Lwood
Don't forget animals getting into your excavations, we had a horse get into one of ours once!
Also don't forget excavations on slopes.
L
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