Your quote for that FDA standard is for water, which is consumed by typical people at a level around 1000mL/day (varies widely). The testing is done on toothpaste, which is not consumed at all when used correctly, and even if directly swallowed would be something around a 100mL tube every few months, so 2-3 orders of magnitude less exposure at worst.

Which would put even the most contaminated products in their chart at the "safer than water" level.

I think it's fair to say we're looking at junk science here.