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Jack AW  
#1 Posted : 28 January 2016 12:15:03(UTC)
Rank: New forum user
Jack AW

Hi, I am relatively new to H&S and certainly COSHH assesments.

I work for an office furniture supplier and we have recently started producing our own seating range.
This seating is being assembled in our warehouse and involves the use of a spray adhesive called Multitak (SDS http://www.pwflooring.co...EET/Multi-Tak_Safety.pdf ) to attach the seating foam to the seat outer shells.

I am told that the adhesive is used for approx 15mins 4 or 5 times a day (I will check and monitor this) in a well ventilated warehouse (1 roller shutter door open 90% of the day).

Is there some way to calculate the WEL knowing the aerosol size (500ml) and the number used per day or do we have to bring in a specialist to monitor the air ?

Thanks in advance Jack
Roundtuit  
#2 Posted : 28 January 2016 12:34:13(UTC)
Rank: Super forum user
Roundtuit

Personally I would start by getting an up to date Safety Data Sheet from the supplier.

The document in your link is from March 2013 and classified according to the previous Dangerous Preparations Directive.

A lot will have changed since this was prepared in the available knowledge being accumulated for the component substances in registration dossiers submitted under the REACH Regulations.

Ideally you need a Classification, Labelling & Packaging (EC 1272/2008) SDS - this became mandatory for mixtures in June 2015.
Roundtuit  
#3 Posted : 28 January 2016 12:34:13(UTC)
Rank: Super forum user
Roundtuit

Personally I would start by getting an up to date Safety Data Sheet from the supplier.

The document in your link is from March 2013 and classified according to the previous Dangerous Preparations Directive.

A lot will have changed since this was prepared in the available knowledge being accumulated for the component substances in registration dossiers submitted under the REACH Regulations.

Ideally you need a Classification, Labelling & Packaging (EC 1272/2008) SDS - this became mandatory for mixtures in June 2015.
Kate  
#4 Posted : 28 January 2016 12:50:48(UTC)
Rank: Super forum user
Kate

You don't "calculate the WEL" - you assess whether or not the WEL is exceeded, and reduce the exposure as much as you reasonably can below it.
If you are using the product for the purpose for which it is intended and in the way in which it is intended to be used, then often following the manufacturer's instructions will be enough to assure you of this - the data sheet (especially if you can get an 'extended safety data sheet') may give you enough information about safe use (eg use in a well ventilated area).
Ian Bell2  
#5 Posted : 28 January 2016 13:32:42(UTC)
Rank: Super forum user
Ian Bell2

If the information you have given is correct, unless the substance has a pretty low WEL, I would doubt that you are exceeding the WEL.

When you say 'used for 15 minutes, 4-5 times per day' - do you really mean the substance is sprayed a few times during each 15minute period, for a few seconds?

In which case the exposure time is probably less than 15 minutes.

If the door is open for most of the day, is it possible to arrange the work such that that ventilation air is carrying the aerosol spray mist away from the workers breathing zone?

I would only arrange monitoring/sampling if there was serious/genuine concern that workers were being exposed beyond the WEL on a regular basis.
stonecold  
#6 Posted : 28 January 2016 13:38:10(UTC)
Rank: Super forum user
stonecold

Kate wrote:
You don't "calculate the WEL" - you assess whether or not the WEL is exceeded, and reduce the exposure as much as you reasonably can below it.
If you are using the product for the purpose for which it is intended and in the way in which it is intended to be used, then often following the manufacturer's instructions will be enough to assure you of this - the data sheet (especially if you can get an 'extended safety data sheet') may give you enough information about safe use (eg use in a well ventilated area).


Hi,

When you say use the product in the way it was intened to be used, would that also include having to use the recommended PPE which appears on the SDS (link provided in the orginal post)
JohnW  
#7 Posted : 28 January 2016 14:01:11(UTC)
Rank: Super forum user
JohnW

Jack,

No-one has yet pointed out that the SDS states that the substance contains up to 30% DCM dichloromethane also known as methylene chloride.

All the companies I have worked with BANNED the use of that material because it is has been classified as a Category 3 carcinogen; it has the risk phrase R40 ‘Possible risk of irreversible effects’ - so it is suspected of causing cancer in humans but not certain.

The advice from me is that if you have no alternative adhesive, at present, you should eliminate completely any possibility of employees breathing DCM. So they should work with a local exhaust ventilation, preferably something like a fume cabinet where air is drawn towards the workpiece and exhausted outside the building.

There is specific guidance from HSE wis19 see link, though it seems to be dated 2001, worth getting more recent guidance.

http://www.hse.gov.uk/pubns/wis19.pdf


John
Ian Bell2  
#8 Posted : 28 January 2016 14:13:31(UTC)
Rank: Super forum user
Ian Bell2

Before we start getting all emotional and using capital letter and banning things.

It is necessary to check/obtain a more up to date MSDS if one is available. Also check EH/40 for the WEL limit.

But from the information given, the substance is not banned from the legal perspective, just some companies seem to have made their own choice in not using it.

Provision of adequate ventilation remains a key control measure, to carry the mist away from the user(s).

However following CoSHH principles, substituting for a 'safer' substance should also be considered and adopted if possible.

A suitable and sufficient task analysis is required i.e. a CoSHH assessment, which considers all relevant factors.
JohnW  
#9 Posted : 28 January 2016 14:17:42(UTC)
Rank: Super forum user
JohnW

And Jack, get hold of a modern MSDS for the DCM, one which has the new CLP phrases and symbols, send it to your supplier and ask them to get their system up to date.

Fisher Scientific msds is worth looking at, not sure if this link will work but you'll find it via Google

http://www.fishersci.com...%2B1L%26catNo%3DD37-1%2B

John
JohnW  
#10 Posted : 28 January 2016 14:23:37(UTC)
Rank: Super forum user
JohnW

I wasn't getting emotional, just giving advice that my customers would give.

I've never encountered DCM used in an aerosol, only with a brush application or a dip tank.

The problem with the aerosol, is that any local exhaust LEV will likely render the process useless, i.e. most of the spray will be sucked away before it gets onto the chair.

Without the LEV the HSE wis19 states: The minimum protective equipment requirements for anyone working with DCM are impermeable overalls, apron, footwear, long gloves
and gauntlets and chemically resistant goggles or visor!

I think the employees would prefer LEV - so maybe a brush application is the way forward.


John
Jack AW  
#11 Posted : 28 January 2016 14:44:37(UTC)
Rank: New forum user
Jack AW

Thanks for the responses.

It is the DCM that I am concerned about and it appears that the only way to get a definite answer is to call somebody in to do some monitoring. We are in the process of having a purpose built unit for the seating manufacture so LEV has been talked about for that.

Regarding the substance being banned i read that it is in relation to its use as a paint stripper at a higher concentration as it was being applied neat.

I have requested an uptodate MSDS from the manufacturer.

The Aerosol is marketed as - Made to bond carpet tiles, foam and other underlays, fabrics & textiles to most hard surfaces.

The use as a carpet tile adhesive will make LEV difficult in a customers premises & RPE to fit carpet tiles seems a bit excessive.

chris.packham  
#12 Posted : 28 January 2016 15:20:45(UTC)
Rank: Super forum user
chris.packham

Methylene Chloride . . .
Keep in mind that for this chemical the only gloves that provide more than 10 minutes protection (nominal according to EN374-3 and not what you may get in real use) are gloves manufactured from Viton. These cost about £80 per pair and even these will only give you a nominal protection class 4 (2-4 hours, then they are effectively scrap!).
Chris
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