the attentive readers of the blog is probably still remember that I agree with Valerie and the help of a English chemist at the University of Barcelona in November water samples in the Quebrada Cushuro not far from La Pajuela had taken. Although this analysis does not correspond to scientific standards, as we had taken only one sample at one point, but they were for us an indicator as it is about the water quality of the last remaining natural water source of the farming community is made. The pH value of 5.7 indicated that the water is acidic, and after the samples in Lima in the laboratories of Universidad Católica were examined were, it turned out that in addition to many heavy metals, the highly poisonous substances arsenic, cadmium and lead. The concentration of all these substances was not only far exceed the limits of WHO (World Health Organization), but also those of low Peruvian standards. As for the quality of the water Perú has the lowest environmental standards in Latin America.
Yanacochas "100% certainty" that is not mine waste water can seep into groundwater We did not start at first glance, the results would not be much since they mentioned corresponded to no scientific standards. Nevertheless used the lawyers of the all red Grufides analysis results to put pressure on the authorities in Cajamarca, but finally carried out in the town of La Pajuela official water analysis. In early July the efforts bore fruit and finally, the Authority ordered a water sampling in Quebrada Cushuro . Differently than we did, the authorities also have to inform a mining company at least 3 days before a sampling within a mine.
an example of the typical red-brown discoloration of the soil by acid water (compared with normal soil at the edges), here in the river bed of the dry Quebrada Shillamayo in the mine Yanacocha The cajamarquinische Authority Yanacocha informed 5 days before the arrival of the water analyst. The contamination by heavy metals and other toxic substances can be notice only after a laboratory test, however, the pH immediately identifiable as if by magic was the other way around. The acidic water was basic at once! What had happened? Mining companies in Peru are large consumers of lime. The chemical compound lime occurs naturally many different applications, but it can also be used just as an addition to materially affect the water's pH. achieved in conjunction with carbon dioxide dissolved in water and lime is a good basic water turns acidic. However, it was the mine meant to be a little too well with the Kalkdosis, because the pH of the Quebrada Cushuro had increased from 5.7 to just above the 11th An alkaline pH of 11 does not even necessarily "healthy" water. The indication that the pH value contradicts the Umgebungsbeochbachtungen wanted neither the engineers nor the authorities Yanacocha scientists accept. Results are now once binding. The stones in and around the Quebrada Cushuro all have a reddish-brown discoloration (deposition of iron (III) hydroxide), which is the clear sign of high acidity of the water. Again, this experience was yet another lesson about appearances and reality in Peru, when it comes to mining.
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