3 ms·

Partly though, if I'm remembering correctly, is that no amount of lead is considered 'safe'. Obviously that's very difficult, and many people will be exposed to

• dredmorbius 5y ago
  Again: it's a matter of quantity, background or other source rates, costs of reduction, measurement capability, and alternative harms, etc. All quality standards are specified on some acceptable deviation. The goal is to not exceed the standard. Equipment, water supply, source materials, packaging, extant air containation (if in an area in which, say, leaded fuels remain in use), etc., might all contribute to trace contamination. If you have an interest in the reasoning / conditions, rulemaking hearings and evidence likely refer to this. I'm not about to dive into this, but if you have a genuine interest, the US regulation is in 16 CFR 1303.1, created in 1977, amended in 2008. Hearings reports are likely available and will have scientific, industry, and public-interest statements. https://www.ecfr.gov/current/title-16/chapter-II/subchapter-B/part-1303/section-1303.1 https://www.ecfr.gov/current/title-16/chapter-II/subchapter-... https://www.cpsc.gov/Regulations-Laws--Standards https://www.cpsc.gov/Regulations-Laws--Standards