Faced with a problem here at work

[NOT A TA]

More info? Is this a manufacturing facility? Institution? Corporate? Are there lift stations or other pumps involved? Piping age and type? Any relatively new exterior changes? Gutters, roof mounted AC units etc. Anything noticably decaying?



Have you done testing in several parts of the system during normal and high flow periods to try and pinpoint the origin of the aluminum? Tested for aluminum in the base of any sedimentation basins? Any chance of contamination from an outside source? Could be something as simple as a truck that picks up aluminum shavings from a neighboring manufacting operation having shavings blow off on the road by where you are, then getting into your system during high flow runoff periods.