Fish, you surely know that HF is a world different to H2SO4....

Fish, you surely know that HF is a world different to H2SO4. H2SO4 is very commonly used, while HF is prohibited in most cases.

For someone that bothers to come back to the L-max PFS and quote those lines, yet does not admit to this fundamental issue of having HF in the Sileach process, is beyond belief.

A: I think there is poison in your soup, mate. It might kill you.
B: I dont care, there is MSG in your soup! I remember you saying it!
A: yeah but ... whats the point?

You must be an LIT officer. Most common folks dont behave like that.