I disagree, but have an (what I think is informed) opinion on the issue. Specifically, there is no such thing as a "class 3 hazardous materials suit." Instead, I think the Foundation would go by (and in-universe, likely invented) UN standards: Level A: A goddamn spacesuit (not really) that protects wearers from all gases and liquids that can't break the suit or in any way compromise its integrity; Level B: a suit that protects from liquids and provides breathing air; Level C: in layman's terms, a gas mask and clothing to prevent extensive exposure. (There's a Level D, but it doesn't count because you might as well be naked.)
In regards to the article, the people responsible for containing this thing would know which is which and how to use them. However, I don't see why the containment specialists would need HAZMAT protection, because the article doesn't explain how the SCP spreads.
Edit: Ignore that last sentence, I had a stupid.
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