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i have been tasked with advising a client on their requirements for the layout and specification for emergency showers in a chemical plant. This must include maintenance requirements and exposure (i.e. do they need curtains) and water supply requirements.
Any advice on what regulations, codes and/or technical guidance documents I would make reference to would be appreciated.
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Rank: Forum user
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Rank: Super forum user
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Brian,
there is also some good information on:
Note: I have no connection with this company or its suppliers. I have seen their products installed in a number of water and sewage treatment works and scientific laboratories.
There is a British Standard (BS EN 15154) for safety showers for laboratories, but it assumes minimal skin / eye contamination. The standard used by the above company delivers specifies almost twice the water flow rate at the shower head, and is preferred by some industrial Clients. Edited by moderator 11 February 2015 09:34:29(UTC)
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Rank: New forum user
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Rank: Super forum user
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The fact that you have asked whether there should be curtains for safety showers is an interesting one.
On one hand, we could argue that in an emergency situation, stipping off clothing and using the shower is the priority and modesty should not be a significant factor, but it depends how humans behave i.e the cultures the employees originate from and the sex of the users. I have had personal expereince for lab safety shower systems where curtians were not included in the original design/build, but a minor event led us to review the system and retrofit curtains. The main factor was the the showers were at a "safety station" that was adjacent to a glass partition that seperates the labs and office areas and we have a significant female population.
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Rank: Super forum user
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What a coincidence - I have been teaching lab safety all morning.
Emergency showers will be used in the most extreme of circumstances, not for general hygiene purposes. Modesty should not be an issue. Indeed, in circumstances where contamination is severe it may be necessary to hold someone under the shower, and help them - remove contaminated clothing; physically supporting the individual; holding down the pull handle to keep water flowing; restraining the individual to prevent them from making things worse, even if all of this risks some contamination of yourself in the process. Obviously, that needs to be instantly risk assessed, since if the contaminant is so harmful you may have to stand back until other means of protection are available.
This situation is common for serious acid or alkali splashes to the face, where reaching for a 1 litre eyewash bottle may be inadequate. It will help preserve the sight of a screaming victim who is holding hands to their face and running blindly around a lab to restrain them and forcibly push their head into a sink and hold them under a running tap for 5 or 10 minutes.
Not nice, but later they may thank you for such decisive action. It hardly seems like a time to think about modesty.
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Rank: Super forum user
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Also consider screens & curtains as a possible delay in actually getting under the running water?
The chances are that a slight irritation will quickly turn into pain where modesty may be related to where the shower is situated.
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Rank: Super forum user
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Ian,
I agree with you that modesty should not be an issue, but nevertheless, it was done! Fortunately, for us the retrofit was not overly expensive. One of the factors that is not coomon for older labs is that our labs have glass partitions from floor to ceiling that seperates the office areas, and the safety station (the safety station has handwash-basin, eye wash & safety shower, hand wash/care units, safety glasses) is situated in full sight of the office personnel via the glass partition.
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Rank: Super forum user
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Ahh yes. Stand behind the screen or curtain, eyes averted to protect the modesty of someone at dire risk of severe effects or death after some gross splash!
So, eventually all goes quite. At what point to you decide to breach these silly ideas of modest, and take peek inside to find them collapsed on the floor, or worse?
Crazy idea. Never have I seen a laboratory emergency shower surrounded by any obstruction, wall or side panel, screen or curtain. The prime requirements are ease and rapidity of access. A great big grab handle to turn the water on, that will continue to flow for some time after the handle is released in case the person cannot hold on.
The more sophisticated showers have a loud audible alarm sounding locally and at a central station to serve as a call for help and to deal with malicious activations that may cause flood damage.
But then, if this shower is more for personal hygiene etc, what is it doing in or near the laboratory? It should be properly constructed as part of a changing area, rest room etc.
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Rank: Forum user
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Any emergency showers I have came across with curtains have been on internal areas where the contaminated water is retained within the enclosure to avoid any more contamination and they are close to the risk area, external showers for layout are generally in area`s with good visibilty for emergency response to the incident alarms can also be fitted to the base plate for faster response to any activations.
Do you know what the plant will be processing as that could help a lot with layout of showers in relation to high risk areas.
Perhaps a search through comah may help ?
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Rank: Super forum user
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Rank: Super forum user
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Jay
That's the type of shower I see regularly, though often with a great big diffuser on the top to give a wide deluge. They often have a system whereby the handle activates the flow but release of the handle doesn't immediately turn off the supply.
It's just that this concept of requiring modesty screens hints at the use of the emergency shower for less critical and perhaps general hygiene purposes.
Most emergency showers will have a longer or lower lever or chain pull, perhaps to ensure that it can be reached even if you are on your knees in agony? And surprisingly, never is their a raised shower tray - I guess it would need to be very wide and thus cause obstruction - and very rarely is there even a nearby drain. Perhaps because of retrofitting with limited expenditure, but a life is more important that damage to the floor.
However, we should think about safely draining away contaminated wash water, and lastly about Legionella testing of the outlet which will be rarely used (hopefully) but regularly tested.
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Rank: Forum user
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Ian.Blenkharn wrote:Jay
It's just that this concept of requiring modesty screens hints at the use of the emergency shower for less critical and perhaps general hygiene purposes.
as rule of thumb if you are in an emergency shower your there for 10 minutes and should be removing all your clothing for medical assistance and/or possible transport to medical facilities.
The screens i have never associated with modesty more containment of the water spray so that it is drained to a nearby effluent sump for control and containment altho my experiences are generally with cyanides and Acrylonitriles and enclosed drainage systems.
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Rank: Super forum user
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Ian.Blenkharn wrote:Emergency showers will be used in the most extreme of circumstances, not for general hygiene purposes. Modesty should not be an issue. Indeed, in circumstances where contamination is severe it may be necessary to hold someone under the shower, and help them - remove contaminated clothing; physically supporting the individual; holding down the pull handle to keep water flowing; restraining the individual to prevent them from making things worse, even if all of this risks some contamination of yourself in the process. Obviously, that needs to be instantly risk assessed, since if the contaminant is so harmful you may have to stand back until other means of protection are available.
Or you could contain the contaminant and leave someone inside a cubicle, go inside to help them but contaminate yourself, or stand back, stay safe and leave them to it. Not an easy decision, and one nobody will wish to have to make.
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Rank: Super forum user
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Our labs are "newish" i.e. built in 2005/6. No drains, as lab drainage goes to normal sewer system. No draining of chemicals in sinks either and a robust chemical waste disposal procedure
As these are emergency units, its use is rare.
Should we have such an event, it will trigger our emergency response that includes first-aiders, spill responders and most importantly, the on-call "duty incident manager"-all have been trained and we have a combination of desktop/actual stimulations on a regular basis. We are fortunate that we can afford a radio system--all our first aiders and duty incident managers have radios. The duty incident manager becomes the "incident commander". Normally, one would find such arrangemenst on manufacturing sites, not common in reasearch laboratory establishments where typical lab chemicals are handled.
The emergency shower system is part of the site legionella management system
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Rank: IOSH staff
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** NB link removed from post #3 at request of website owner**
Regards
Nick
Web Team
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Rank: Super forum user
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In our emergency showers the main aim of the curtains is to prevent the water going everywhere, not just when they are being used for real but when they are being tested to see that they work. We keep some spare clothing to cover up people after the shower.
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