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Il bacino di ritenzione che rallenta il flusso dell'acqua del torrente Spöl, nei Grigioni, è fortemente inquinato da bifenili policlurati (PCB) provenienti da scarti industriali. L'Ufficio per la natura e l'ambiente ha dunque commissionato, per la prima fase, il risanamento del sito che si trova al di sotto della diga Punt dal Gall. L'obiettivo è quello di eliminare i sedimenti contaminati.
Il monitoraggio avviene giornalmente anche per quanto riguarda i corsi d'acqua adiacenti. Rimane in vigore ancora il divieto di pesca per il lago artificiale Ova Spin perché è stata constatata nelle trote un valore di contaminazione da PCB leggermente elevato.
MABO
Dal TG12:30:
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