Maybe the 5 μg/dL is ridiculously low, as is the need for a hazmat team to renovate a kitchen in an old house with lead paint.
Ludicrous.
They keep lowering the threshold until there is a problem.
“...as is the need for a hazmat team to renovate a kitchen in an old house with lead paint.”
You want a visit from a Haz Mat Team? Break one of those freaking poison-filled light bulbs the EnviroWeenies have crammed down our throats!
I don’t know what the exposure values were in the late 70s. Re Umgud’s comment. While in grad school, I spent summer weekends as range safety officer for IHMSA matches, and the Minnesota state championships. All well and good. Winters, at an indoor range in a northern Minneapolis suburb, I ran two different combat pistol leagues, probably spending 8-10/hr per week at or behind the firing line. Because of the cost of heating the exchange air, the range cut the ventilation volume in half.
I was eventually symptomatic, underwent chelation at UofMN health services. It was the lead styphnate. Black mucus when blowing my nose should have been a clue.