Just to make sure everyone is aware - this isn't a solved issue of the past. Airplanes continue to use leaded gasoline that, while much smaller relative to everyone's car running on it, contributes to higher than healthy lead in our environment.
1. https://www.gao.gov/blog/2018/06/20/lead-paint-in-housing
2. Here's a better source actually: https://www.hud.gov/sites/documents/AHHS_REPORT.PDF
The result was 105 ppb. This is insane when you consider that Flint's level was 20 ppb during the crisis.
The cold water should be zero, but I installed a lead filter to ensure this.
Lead testing is pretty cheap and there are usually a lot of labs around big cities. Highly recommend water testing even if you don't think you have the risk factors.
Could you tell me what you used to do the testing?
Another time I asked my local city water lab. They had no procedure for some random guy from the public, since those other companies exist and already make it convenient, but they still did not even try to send me away and the big lab boss himself handled my case, explaining the procedure and all, and taking the water samples back from me. Price was similarly little.
By the way, that second time I tested a very commonly sold entry-level Italian portafilter machine, a Rancilio Silvia with a brass boiler that even today contains lead. Following the sampling procedure I had agreed upon with the lab boss as the correct one the lead values I got back significantly exceeded the limits. And about those limits, the medical limit is zero. That the official limit is higher is because our society is unable to get us to that desirable level.
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By the way, a good chelator for lead is DMSA, which is produced very cheaply in China. Russians produce "Unithiol" (DMPS) which is best against mercury, and somewhat good against lead (and a lot of other stuff). I actually got Russian Unithiol even though DMPS also is produced here in Germany as "Dimaval". I never used EDTA derivatives for chelation, but I have many years of.. experience with DMSA and DMPS. See somewhere in my comment history. That is why I took lead a bit more seriously and why I tested my portafilter machines. I now have an Ascaso Steel Uno PID whhere the manufacturer took great care to eliminate anything that could be problematic in all components - plus, it's a really good portafilter machine :)
Whats the point of that then? If its accuracy is not good enough for court, have you just bought an experience?
I always used to get a sore throat from being a passenger on long vehicle journeys when leaded petrol was around and I was informed some years later Pectin is good for pollutants like lead.
Never heard or seen any studies that back up this claim though, but I still bought a few bottles and necked them to see what sort of effect they had.
I think N Acetyl Cysteine (NAC) may be useful for moving metals around the body.
What's court got to do with any of this? You do a lab test to find out if your water is contaminated, and then you take steps to resolve that. Either change the piping, or put in a filter.
The minimum threshold for accuracy in court is zero. Courts don't make admissibility decisions based on the quality of the evidence; they make the decision on other, more inscrutable criteria.
Living in an older house it's been totally worth it to test for lead in the usual places so we can be aware of our exposure risks, and also to have our blood tested periodically for lead to make sure we've been successful avoiding it.
Are you worried about exposure from things like showering and brushing your teeth?
https://www.reddit.com/r/left_urbanism/comments/uj8y70/an_es...
Search for something like "toxicologic(al) asessment/profile of jet fuel" and prepare to have your mind blown. While what pops up then mostly covers the military variants like JP-4,7,8, there is enough about the civil use Jet-A1 you are talking about.
I don't think you can definitively state that aircraft pilots aren't having health issues due to AvGas exposure, I can't really find any studies about it but one of the more common health side effects of lead exposure is actually a predisposition to heart attacks due to how lead messes with your blood streams.
Okay, for the people who can't read between the lines and just resort to downvoting instead of actually being useful in a conversation.
1) The article is about childhood lead exposure on adult personalities.
2) He makes a comment about aviation and its current use of leaded gasoline ("contributes to higher than healthy lead in our environment") with the warning "this isn't a solved issue of the past".
3) This implies that the aviation industry and its use of leaded gas is in any way comparable to what we had before when everybody had daily contact with leaded gas.
4) Nobody has yet provided any evidence of the fact that aviation results in any appreciable exposure to lead for your average citizen.
5) This matters because the original article is not about environmental impact. It's about childhood exposure.
How is this so hard? I seriously question the ability of your average HNer to make logical deductions.
The lead exposure as a result of stuff your daily life (which is mostly a reflection of the history of where you live and work) contributes far more than avgas in the atmosphere. Unless you live downwind of a busy GA airport and have managed to get all other
Also, here's a plane flying at 4000 AGL. How much of the lead it puts out is going to affect the lead level at ground level? (I mean, it can raise the ppb of the entire atmosphere, which eventually affects everyone, but that's a huge mass to affect.)
It might matter for those living downwind and close to heavily-used private plane fields, though.
And to point #5 - the levels present in our environment directly contribute to how much childhood exposure you'll suffer.