Addendum:
I found this article which might be useful:
http://www.cdpr.ca.gov/docs/emon/pubs/fatememo/imid.pdf
Apparently there can be a risk in water and also the formulation
can affect the persistence and risks.
Well worth reading IMO. (I can't copy and paste the relevant two paragraphs
from it without gong through an OCR like the one in Onenote. The doc is 'protected'.
Some organisations do that, and it makes their publications much less useful and
more, not less vulnerable to subjective reporting).
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