The biological analyses will ...

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The biological analyses will not give any impression of pollution since they are biological, biological pollution not existing. Concerning various chemical pollution the problem resides that each analysis seeks a chemical component. With the result that it would be necessary to make many sampling and many analyses. It would not be not more advantageous to search at the beginning the possible pollutants of the site and to see according to their pollutant if those Ci arise during an analysis. In France of the analyses are made on the rejection of waste waters. what recherceh T one? That pollutants which one is certrains not to find. The analyses are always good.