It really sounds like the samples got contaminated---i would just repeat the sampling, but ensure hands are sanitized , taps are wiped and water is left running for at least 60 seconds prior to sampling
all it takes is one small touch and your sample is compromised.
I wouldn't assume the taps are contaminated, I would assume the samples were compromised----- I would suggest you take the tech with you and retrain for the second set.
If those come back high, then you need to flush those lines and try again
I would just drop the atypical testing-----------can't imagine there is any value to it
everywhere i have ever worked, samples are just checked against the national standard for drinking water, which IMHO is all you should be doing as well
it reads like your predecessor perhaps didn't understand the actual requirement and went way way overboard. scale it back to what you actually need, which is the national drinking water standard
Edited by Scampi, 14 September 2021 - 01:15 PM.