Non-existence of toxicological testing on hydrofluosilicic acid (H2SiF6)

Additional comments on the RUC meeting of Sept.10, 2009

The RUC committee clearly doesn't admit the crucial difference between testing on a particular compound and testing on "potential
constituents" of a compound. I have it in writing from GRU stating (and I quote): "To our knowledge there is not an individual
toxicological study performed on hydrofluosilicic acid." (or hydrofluorosilicic acid, or hexafluorosilicic acid, or silicofluorides,
or fluorosilicates, or H2SiF6 -- all refer to the same compound).

In fact, this most-salient sentence was left out of the meeting agenda and only the statement about testing the "potential
constituents" of the compound was printed in there.
Whether by "potential constituents" Mr. Cunningham means the many trace contaminants in the H2SiF6, such as arsenic, lead, thallium,
etc., or whether he means the silica and fluorine ions that make up the compound, the point is that testing on any of these
"potential constituents" is NOT EQUIVALENT TO TESTING THE H2SiF6 ITSELF, which hasn't been done.

Furthermore, in general, different fluoride compounds have different toxicities, with the silicofluorides being the MOST TOXIC of
all, classed "EXTREMELY TOXIC," while sodium fluoride and calcium fluoride are less so. (See the document submitted to the official
record at the meeting, 9/10/09).
I read the NSF Fact Sheet and found it to say that testing on the chemicals added to water is required "if available," two words
that were left out in Mr. Cunningham's presentation. In this case, testing on H2SiF6 doesn't exist, so is not "available."

I also have it in writing from the EPA that as of the year 2000 they knew of no studies done on this compound either. (This letter
was also submitted to the official record of the 9/10/09 meeting.)
Therefore, I stand by my statement that there are no toxicological studies on H2SiF6 and I challenge anyone to show me one.

Thus I wish to clarify that as drinkers of Gainesville water fluoridated with H2SiF6, we have no assurance of this particular
compound's safety or efficacy due to the nonexistence of testing on the compound itself.

Respectfully submitted on 9/14/09,
Karen Eberly