The end of the lead weight era

[NAM001]

Well you are in California. A state well known to have substances that harm people, but only in the state of California. In the rest of the world it is just fine.
Caffeine is on the same list as lead.
California Proposition 65 list of chemicals - Wikipedia

thank you

 

[Manatee Diver]

By not using copper cooking pots?

There are specific warning to not cook acidic dishes in cooper pots, or else you can get copper toxicity if you do it too much.

 

[2airishuman]

As Cu, Fe, Mn, Mo, Ni, and Co. I still try to avoid ingesting excessive amounts (and for some of those elements, "excessive" is a very, very small number). There's a limit below which where Pb is basically harmless. And there's a level above which where e.g. Cu becomes very toxic.

There's a story of a university lab where research in hydroponics was being conducted. Various irreproducible results were found over a period of months. Upon closer investigation, it was determined that a stock solution, purportedly of Mg, had in fact been prepared by a graduate lab assistant using salts of Mn. That's the stuff you gotta watch.

Sola dosis facit venenum

The problem with Paracelsus' line of reasoning in this situation is that Pb bioaccumulates; the LD50 is relatively high, but the threshold for daily exposure over a period of months or years is not. For people who handle lead routinely on an occupational basis, this is a serious problem, and is the reason why blood tests are used in places like the battery industry. This is where you could run into problems with the DM who stacks lead on the boat twice a day over a period of years.

 

[tursiops]

Well, I tried to imagine how one can "avoid ingesting excessive amounts of zinc [and also Cu, Fe, Mo, Mn, Ni and Co]". By not biting galvanized nails? By not using copper cooking pots? By not sucking nickels and dimes? Avoiding molybdenum must be espesially hard, it is everywhere.

Are you suggesting people should stop chewing on their lead weights?
Maybe you can find a way to circle back round to the thread.....

 

[NAM001]

I could not find a photo of a tire weight being washed down, but maybe you can make the mental connection looking at the pictures of boulders or while cars; it’s in a Texas newspaper for added credibility;-). Photos: Boulders and debris challenge rescue crews after rain triggers California mudslides | Photos | Dallas News

I understand land masses dong this but those events are rare in comparison to other natural events. So much of our tree hugging IMO comes from the west coast where concerns are born of what ifs in the worst possible combination of conditions. Possisbly combinations that can not happen. Then like fuel. (read form articles) the add a chemical that is a cancer causer to reduce the environmental impact of exhausts. One could jest that we are killing of our selves before the environment can do it.

Back to lead It is a common process not to rely on people dong the right thing so they legislate to make it happen. End result is no change because people will not follow the law. IE. would it not be easier for divers to inspect their gear and replace soft weight pouches when damaged instead of outlawing lead use all together to avoid a consequence that may or may not be real when talking about specifically scuba lead. I mean if you are loosing lead form your weight pouches it is a problem with maintaining depth more than it is the environment and the diver replaces it. one factory discharging a lead containing solution into a stream IMO will do more damage that decades of tire weight dust and scuba pouches could ever do. In our area as i understand it. if you harvest seafood you have to have a tag on it saying where it was harvested from. You can not serve sea life caught say 15 miles form shore because of I think heavy metals in the shore adjacent waters.

 

[tursiops]

This is where you could run into problems with the DM who stacks lead on the boat twice a day over a period of years.

He's in more danger of a broken foot than lead levels in his blood stream.

 

[NAM001]

What are you talking about? What is your point?

I'm not sure but I would get from the statement that there is a need for galvanized material so the need determines how much of a threat an issue is instead of science. Imagine the insurance lobby folks loss of galvanized materials will cost billions in claims each year from steel facilities rusting away and roofs blowing off houses. Suggesting that if lead was critical to construction we would not have lead regs.

 

[NAM001]

There are specific warning to not cook acidic dishes in cooper pots, or else you can get copper toxicity if you do it too much.

outlaw copper ha ha

oops copper is used in construction and wireing

 

[NAM001]

There's a story of a university lab where research in hydroponics was being conducted. Various irreproducible results were found over a period of months. Upon closer investigation, it was determined that a stock solution, purportedly of Mg, had in fact been prepared by a graduate lab assistant using salts of Mn. That's the stuff you gotta watch.



The problem with Paracelsus' line of reasoning in this situation is that Pb bioaccumulates; the LD50 is relatively high, but the threshold for daily exposure over a period of months or years is not. For people who handle lead routinely on an occupational basis, this is a serious problem, and is the reason why blood tests are used in places like the battery industry. This is where you could run into problems with the DM who stacks lead on the boat twice a day over a period of years.

Yes and i agree with that. IT is an occupational exposure issue and not a consumer recreational issue.

 

[GJC]

Well you are in California. A state well known to have substances that harm people, but only in the state of California. In the rest of the world it is just fine.
Caffeine is on the same list as lead.
California Proposition 65 list of chemicals - Wikipedia

CDC is in Atlanta, GA, not California.