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Antique Tractor Paint and Bodywork |
Re: Lead Poisioning
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Posted by Red Dave on March 14, 2005 at 12:10:24 from (24.104.94.34):
In Reply to: Re: Lead Poisioning posted by CNKS on March 14, 2005 at 11:15:37:
N 95 is not sufficient for the fine dust. When you grind, sand, wire brush etc. on lead paint the particle size is too small for the N95 to remove enough of the small pieces. P100, or R100 would be a better choice. P100 is the same as the old designation HEPA, that is it removes 99.97% of dusts, mists & fumes down to .3 microns in size. OSHA allows a half-face mask with P100's to used for up to 10X the permisible exposure limit for an 8 hour day. An N95 filter is about as much protection as one of those filter masks sold for nuisance dusts. Even at that, a half-face respirator even with a P100 isn't sufficient protection at extremely high lead concentrations or if you burn or weld on metal that is covered with lead-based paint. Burning and welding breaks the lead into atom-sized particles at very high concentrations. Those operations may require a Powered Air-Purifying Respirator (PAPR) or in some cases even supplied air or SCBA.
None of this is worth a darn without a good facepiece seal. Note well: this is not legal or industrial hygiene advice, just sharing some of what I have learned over the years. You should do some research of your own on the subject to satisfy yourself as to your own personal health protection requirements.
Thus endeth the disclaimer, but by all means be careful. Lead poisoning is real.
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