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Peak Sand?

Feb 27, 2018 at 12:35 AM CST
HI
I have to wonder what they are using for the stone component of the concrete and how the seawater contamination of beach sand effects the structural strength of the finished project. Just one earthquake away from a disaster? any idea.?
Thanks

I did not find the right solution from the internet.
References:
http://peakoil.com/forums/viewtopic.p=1347752
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