I'm also confused that it seems that CA OEHHA which sets these limits has separate "No Significant Risk Level" and "Maximum Allowable Dose Level" values for lea

I'm also confused that it seems that CA OEHHA which sets these limits has separate "No Significant Risk Level" and "Maximum Allowable Dose Level" values for lead, and the NSRLs are 15-58 micrograms/day depending on compound, and the MADL is 0.5 micrograms/day. Why for lead is the maximum allowable dose much smaller than the no significant risk level? For other cases (e.g. benzene) where there are values for both levels, the MADL is higher than the NSRL. https://oehha.ca.gov/proposition-65/general-info/proposition-65-no-significant-risk-levels-nsrls-and-maximum-allowable-dose-levels-madls https://oehha.ca.gov/proposition-65/general-info/proposition...