Training Materials



YouTube Video


YouTube Video


YouTube Video


Techniques for Stormwater Sample Collection

  • Before going out to sample make sure your sampling kit is complete: Chain-of-custody (COC), calibrated pH meter or litmus paper, and lab bottles.
  • Only sample water that is discharging from the facility, puddles are for stomping in not sampling from, so do not sample standing water on the facility. 
  • Train all sampling staff on exact locations of sample points, or place markers/signs at locations, so that there is no confusion and samples are always taken at the same point.
  • Always wear gloves when sampling and change gloves in between sample locations so you do not cross-contaminate samples.
  • Collect samples directly into the lab bottles provided.
  • Collect flowing stormwater, do not scrap the bottom of the channel or storm drain.
  • When collecting sheet flow use sandbags to force the stormwater to flow over the bag into the bottle so that you are not scrapping up dirt/debris, which will shoot your TSS through the roof.
  • Fill all lab bottles to the bottom of the neck, but make sure to not overfill because some will have an acidic preservative (another reason you should wear gloves).
  • Take pH reading of sample within 15 minutes of collection and write the value on your COC.
  • Make sure lids are tight so that the sample does not leak out of the bottle.
  • Place samples in a cooler with ice to keep them cold until they arrive at the lab.
  • Arrange with your lab for courier service to pick up the samples or have someone drop the samples off at the lab as soon as possible.