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The testing done by the DOH did not include heavy metals, a by-product of the mining activities
of RTNMC and the processing done by the HPP. In July and October of 2009, Friends of the
Earth-Japan (FOE-J) conducted their own water sampling from various rivers and wells in the area surrounding the mine site and the HPP. FOE-J expanded the test criteria to include heavy
metals. These water samples were then sent to Japan for analysis. Tests conducted using
inductively coupled plasma mass spectrometry show that while zinc and magnesium did not
exceed Japanese standards for water hardness, these metals were still found to be in such high
concentrations that they are considered abnormal.