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Hi all, a quick question about values obtained by SNIFFER. I have to sign this report off by the end of the day, it was supposed to all be stright forward! I am simply checking through a validation report for a site we are pretty happy with. However, they derived guideline values for copper and zinc from SNIFFER - and the values are 129387 mg/kg for copper, and 649566 mg/kg for Zinc!! Surely something went wrong in their calculations there? Or would the fact that the site is residential without plant uptake just create really high values becuase there is less of an exposure? Any help gratefully received.... Jessica Lenham Waverley Borough Council