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Un forte inquinamento al mercurio è stato scoperto in Vallese sulle sponde del fiume Dranse, in territorio dei comuni di Martigny e Martigny-Combe. Investigazioni supplementari sono in corso per valutare l'impatto sull'ambiente e definire le misure necessarie.
La contaminazione è stata trovata nell'ambito di lavori preparatori condotti in relazione al progetto di protezione contro gli straripamenti e il risanamento ambientale del corso d'acqua, indica il Cantone del Vallese mercoledì in una nota.
L'inquinamento è stato localizzato lungo la fabbrica in disuso di magnesio situata nei comuni di Martigny e Martigny-Combe ed il mercurio è stato trovato nelle scorie sotterrate nelle vicinanze dei due stabilimenti, in attività fra il 1927 e gli anni Ottanta. Il problema, dovuto alle attività industriali svoltesi sul posto in passato, tocca gli strati profondi di entrambe le sponde della Dranse e, in minor misura, i terreni dei perimetri in questione non utilizzati a scopo agricolo o domestico.
ATS/sdr
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