Also, low key I feel like “pressure treated wood” should be on this card, seeing how every single practice Q I think I’ve ever seen about arsenic is always about pressure treated wood…
And in that case, maybe it would be a good 1b1 card like so: 
Amboss lists “metal smelting, pesticides, herbicides, contaminated water (esp. in developing countries”. There’s a couple UW QID tags on the card, okay adding pressure treated wood if it’s specifically tested in questions, otherwise not sure it’s necessary
UW step2 12397: pt works with pressure-treated wood for his job (fence post builder) and gets arsenic.
The chart in the answer explanation lists: “pesticides/insecticides, contaminated water (often from wells), and pressure-treated wood” as the sources.
I remember several others as well during step 1 prep, but no longer have access to those anymore. But here is also nid:1505936409887 supporting
Yeah the wood thing is oddly HY, not opposed to adding. Love the currently suggested changes as well
Gunna push this formatting update and will make a new suggestion for the 1b1 change.
New suggestion: