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  1. #1
    Join Date
    Jul 2006
    Location
    Australia
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    64

    Default Trend airshield pro - asbestos

    Hello all,

    Does anyone have any thoughts on using the Trend airshield pro with stock P2 filters when removing asbestos fibro outdoors? The only issue i can see would be cleaning the unit thoroughly after the job, and the non-availability of P3 filters.

    Leon

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  3. #2
    Join Date
    May 2011
    Location
    Murray Bridge SA
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    3,339

    Default

    I personally wouldn't do it, besides the fact that in SA it is illegal to do so. EPA put out meters to read the air so that no problems arise from litigation.
    You have to be a registered asbestos removal business and do heaps of training, and everything has to be wrapped in a certain thickness plastic and dumped at a special facility, according to when they did the house next door. If you got caught, the fines are horrendous. There have been a few instances where some illegal dumping was done, those that did it, are getting 3 meals a day and visitors on weekends only, plus a massive fine.
    To grow old is mandatory, growing up is optional.

  4. #3
    Join Date
    Feb 2003
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    back in Alberta for a while
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    68
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    worrying about your clothing is probably more important than worrying if your Trend air shield is sufficient.

    fibers on your clothes will contaminate wherever you remove them and potentially expose others in your household.
    regards from Alberta, Canada

    ian

  5. #4
    Join Date
    Jul 2006
    Location
    Australia
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    64

    Default

    In NSW, home owners can remove 10 square metres of non-friable asbestos containing material, provided it is wet down and wrapped correctly before being disposed of at an approved facility provided by my council. Disposable overalls and gumboots solve the clothing problem, so the issue remains with the respirator. I could go with a conventional half-face respirator with P3 filters, but this would lose the benefit of positive pressure and mean I need to remove a substantial beard.

  6. #5
    Join Date
    Feb 2006
    Location
    Perth
    Posts
    27,757

    Default

    Agree about the clothes being a problem and that disposal hooded overall and glove would be the way to go with this.

    I would normally want to be using something with P3 filters as P2 are supposed to be >94% efficient whereas >P3 are 99%.

    However you may be interested in this experimental data I have posted before.
    Want your DC checked for invisible dust?-masks-jpg
    The vertical scale for the Triton and the P2 and P1 is on the left so, 90+ for the triton and 98+% for the P1 and P2 masks, while the vertical scale for the No Brand and "Nuisance" masks are to the right i.e. poor.

    The test for 3M P2 and P1 masks were performed by cutting 50 mm disks of material from the mask and using a "filter mount" that completely sealed the edges, so "No Leaks".
    The Triton full face mask uses P2 filters but does not appear as good as the P2 filter.
    Initially I though it was all due to the non-100% sealing of the mask onto the face.
    However, I now believe that some of this is caused by residual dust that has was inside the head shroud before the start of the test.

    What it does show is that 3M P2 mask material appears to be MUCH better than their >94% rating.
    The limitation will not be the filter but the sealing around the face.

    BTW, disposable overalls only offer direct protection. While working around the asbestos dust, as you flex arms and legs the overalls will act like bellows and pump air and fine dust inside the overalls and contaminate clothes and skin under the overalls. It is important to dispose of the overalls, remove and wash clothing, and take a shower, immediately after the job is complete, otherwise you will expose yourself and others to fine asbestos dust as you continue to walk around in these clothes.

    Thoroughly cleaning the respirator after the process will be VERY important. With the Triton full face respirator I disconnect the pump from the fall face mask and hose the whole mask down inside and out. The shroud is removed and thoroughly and repeated washed. I'm not sure what you can do with the Trend.

  7. #6
    Join Date
    Jul 2006
    Location
    Australia
    Posts
    64

    Default

    Thanks Bob, some excellent information there. Having used the Triton helmet a few years ago, I am surprised how ineffective it is against smaller particles. I've had a look at the Trend now, it looks like cleaning it out thoroughly will be feasible, but I would really like to be able to get some P3 filters to suit it. Somehow I doubt this will be possible. Judging by your data, it looks like I should make some filters out of 3m P2 disposable masks!

  8. #7
    Join Date
    Feb 2003
    Location
    back in Alberta for a while
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    68
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    of course another consideration is how much asbestos cement sheeting you want to remove and how you intend going about it.

    your information ...
    Quote Originally Posted by Aerohydro View Post
    In NSW, home owners can remove 10 square metres of non-friable asbestos containing material, provided it is wet down and wrapped correctly before being disposed of at an approved facility provided by my council.
    suggests the assessed exposure risk (provided the material is kept wet down) is relatively low.

    also, if measured correctly, 10 sq.m is less than 4 sheets, about equivalent to an out door dunny
    regards from Alberta, Canada

    ian

  9. #8
    Join Date
    Feb 2006
    Location
    Perth
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    Quote Originally Posted by Aerohydro View Post
    Judging by your data, it looks like I should make some filters out of 3m P2 disposable masks!
    I would not recommend doing this. It's difficult without a particle counter to test if the filter is sealed against its housing.
    The other aspect is filter loading.
    A the P2 filter material from a P2 mask is quite thin because a P2 filter relies on a large area to draw air at low pressure through it to provide enough filtering area.
    If a small piece of P2 mask is used it will load up with particles quickly and reduce the air flow though it.

  10. #9
    Join Date
    Jul 2006
    Location
    Australia
    Posts
    64

    Default

    Yeah, the home-made filters are not a serious suggestion. That would be a whole project in itself.

  11. #10
    Join Date
    Jan 2002
    Location
    Melbourne, Aus.
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    71
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    12,746

    Default

    Old thread, found in a search on the same question.

    My model Trend Airshield is compliant with the older EN 146 standard Class THP2, tested against Sodium Chloride aerosol 0.02 to 2 micron with a mass median particle size of 0.6 micron. There is a claimed minimum protection factor of 20.

    The asbestos industry says that respirable fibres are <3 microns in diameter and >5 in length.

    Edit: 'minimum' added
    Cheers, Ern

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