Perchlorate hysteria mostly fear mongering

Dear Editor,
I agree with Cynthia Walker about the false hysteria over
perchlorate by some with extreme views. There is no doubt that Olin
is the source of the perchlorate contamination and must bear the
financial burden of cleaning up the ground water to an acceptable
and reasonable standard.
Dear Editor,

I agree with Cynthia Walker about the false hysteria over perchlorate by some with extreme views. There is no doubt that Olin is the source of the perchlorate contamination and must bear the financial burden of cleaning up the ground water to an acceptable and reasonable standard.

Not to dismiss Olin’s culpability, columnist Tom Mulhern’s demand of a zero perchlorate standard is not reasonable and would be impossible to achieve. There was not even an awareness of the problem at the levels being considered until testing was perfected to the few parts per billion. We might be very surprised to find all the substance in our water, the soil and our bodies if tests are further refined to detect parts per trillion or smaller.

A well established scientific principle of toxicity is that dosage is directly related to toxicity. In other words, at very low levels of exposure there is no threat to human health. Furthermore, it is very likely that perchlorate occurs naturally or may be formed under certain climate conditions in the atmosphere. Aside from manmade sources, like rocket fuel explosives, perchlorate is known to naturally occur in mineral deposits in Chile. Recent research has found perchlorate in women’s breast milk at 10.5 parts per billion and over 20 ppb in lettuce grow in parts of California where no perchlorate is known to exist from manmade sources.

Hopefully no one will suffer any adverse health affects from the levels of perchlorate detected in the water. I have not read anything about residents affected by thyroid or other health problems after the many years of exposure to the low levels of perchlorate in the water. The fears of those affected may not be allayed, but the entire issue may be overblown and irrational fear mongering by Tom Mulhern serves no good purpose.

Warren Seifert, Gilroy

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