When the first 10 minutes of a storm sends NTU from 2 to 400, what’s working for you to keep results defensible and within method QA/QC? In our lab we pre-label COC, chill to ≤6°C, run 180.1 checks every 4 hours, and document dilutions and matrix spikes per our QAPP; I’m after small process tips that help you stay audit-ready without slowing the field team.