I wanted to get an idea of your experience in this area. We are looking at a site that has now had a number of consecutive quarters of storm water samples with elevated zinc. There are no obvious external storm water exposures and the operating entity at the site does not use zinc or materials in which zinc is a component.
My feeling is that the zinc may be coming from galvanized corrugated steel roof and wall panels, which are not painted and have been in place for some time. I have seen this issue in the EU over the years, but this is a first for me where it is becoming a regulatory headache here in the US.
What do you think? Could the galvanized steel be the source? I'd appreciate your input and advice...Thanks in advance.