Pond Liner Used At Fukushima Daiichi Equal To Trash Bag Plastic
Asahi Shimbun mentions in one of their reports on the pond tank leakage at Fukushima Daiichi that the HDPE plastic sheet being used on the ponds as lining material is 1.5mil plastic.
“The underground storage tank–60 meters long, 53 meters wide and 6 meters deep–is lined with an outer 6.4 millimeter-thick layer of clay, and topped by two layers of polyethylene sheets, each 1.5 millimeters thick.”
This would be a total of 3 mil plastic. Other reports mentioned there might be 3 layers of plastic sheet used, that would only make it 4.5 mil thick.
For some contrast trash bags used to line trash cans are frequently 1.5 mil or thicker.
Liner used for koi ponds or commercial lakes is 20 mil thick.
So the question is who thought this was appropriate and who approved this design using was equaled trash bag plastic. This is clearly sub standard by any measure and as we documented in previous reports over recent days this design used would not meet any standard for even sewage ponds. Now it seems clear this design isn’t even up to the standards of a back yard garden pond.
Maeda Corporation who did the pond work, was found by Asahi Shimbun to have put in an outrageously low bid for the decontamination work they did that was later found to have been not done properly as they dumped materials in ditches and streams or otherwise cut corners.
Previous story on Maeda’s work at Daiichi and shoddy decontamination work http://www.simplyinfo.org/?p=10154
Background information on proper industrial pond construction http://www.simplyinfo.org/?p=10152
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