One of the worst sources of environmental lead was leaded gasoline. Taking
the lead out of gasoline, paint and plumbing were good things. However,
lead is very stable underground, and, like asbestos, causes more problems
if it is disturbed, such as removing old leaded paint. Solid lead is
pretty safe if one doesn't ingest it. Small kids put everything in their
mouths, so toys and other things they are around with should be non-toxic.
However, I really don't understand how children would be around lead-acid
battery lugs and some of the other things mentioned.
With regard to wheel-balancing weights, an old colleague of mine told me a
story about how a farmer was suing the phone company because one of his
cows died of lead poisoning. The farmer claimed the lead was from the lead
sheathing on telephone cables, but George was able to prove that the cow
ingested wheel-balancing weights.
Karen Tellefsen - Electrical Testing
[log in to unmask]
908-791-3069
Phil Nutting
<PNutting@KAISERS
YSTEMS.COM> To
Sent by: TechNet [log in to unmask]
<[log in to unmask]> cc
Subject
02/17/2009 10:18 Re: [TN] Leadfree has gone too far.
AM
Please respond to
TechNet E-Mail
Forum
<[log in to unmask]>
; Please respond
to
Phil Nutting
<PNutting@KAISERS
YSTEMS.COM>
And what about all those Dads taking their kids fishing with all those lead
sinkers? The Bait & Tackle shops will be raided next to remove lead from
the shelves.
And the scuba divers will have to use rocks instead of lead ballast
weights.
And wheel balancing weights should be made lead-free too.
Phil
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Upton, Shawn
Sent: Tuesday, February 17, 2009 10:06 AM
To: [log in to unmask]
Subject: Re: [TN] Leadfree has gone too far.
I remember back about 20 years ago, going to Gettysburg and watching
people try to find old bullets in the ground. I find it interesting
that lead is stable enough to stay in topsoil for decades, yet seemingly
absorbed into the bloodstream very easily. Yet, unless if I am
mistaken, there are little precautions for handling solid lead (based
upon what little I know of OSHA rules for soldering--we went through
that a couple of years ago and I don't remember anything bad being found
for us) required, outside of washing ones hands (and presumably not
nibbling on it).
It's all about lead dust, apparently. I guess old lead based paint, as
it cracks (UV exposure? Last dregs of solvents outgassing, leaving it
more brittle?) is what causes the most exposure?
Shawn Upton, KB1CKT
Test Engineer
Allegro MicroSystems, Inc
[log in to unmask]
603.626.2429/fax: 603.641.5336
-----Original Message-----
From: TechNet [mailto:[log in to unmask]] On Behalf Of Steve Gregory
Sent: Tuesday, February 17, 2009 9:45 AM
To: [log in to unmask]
Subject: Re: [TN] Leadfree has gone too far.
Yeah Richard, you wonder where peoples heads are at sometimes.
A lot of people forget where most all elevated blood lead levels in
children come from. It's from the paint in older homes built prior to
1978 when lead in paint was banned. Blood lead levels in children have
declined 89% since the ban in paint and the lead in gasoline. That being
said, there's still a lot of pre-1978 homes out there that people are
renovating and not being as careful as they should when they do that,
and a large percentage of children are still getting contaminated from
the paint even though it was banned over 30-years ago. Take care of the
paint in all the older structures and you will most likely eliminate all
elevated blood lead levels in children.
Steve
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