Did some quick digging to try and help you out. I stumbled upon this article from the CDC:
https://www.cdc.gov/...wr/mm6746a2.htm
"According to the World Health Organization Codex Standard 193–1995, the permissible limit of lead for infant formula is 0.02 mg/kg lead and for salt is 2 mg/kg. No U.S. permissible limit for lead in spices exists; however, the FDA limit for lead in natural-source food color additives (e.g., paprika, saffron, and turmeric) is 10 mg/kg. The FDA action levels (i.e., the levels at which an investigation is undertaken, or a recall is issued, depending upon the circumstances and findings) for products intended for consumption by children are 0.1 mg/kg for candy and 0.5 mg/kg for other foods¶; however, spices are not considered food intended for consumption by children"
That citing is from the discussion segment of the article provided above. There is more information after that, but I wasn't sure if it pertained to your case and I didn't want to paste the entire paragraph.
Hope this helps!