Interesting stuff. Funny how when you ask questions, you end up learning stuff you never thought you would - i.e., about selenium, how it works, and the whole thing re: aquifer depletion and the central valley.
REALLY glad I joined this forum
... but there are connections between selenium concentrations and pumping the aquifers down....
Similarly, a family friend is involved in wastewater treatment for a cheese factory in the valley. They have a lot of trouble meeting local salt pollution requirements. They end up using reverse osmosis on their wastewater, literally making de-ionized water to pour down the drain, and the concentrated remnants go on a tanker truck for over 50 miles to reach some natural drainage that will eventually carry the salt to the sea.
Jennifer Hall wrote:
Seems a waste to send the selenium salt to the sea, who is polluted enough, instead of the midwest where the farmers buy selenium supplements for their livestock.