Can you Sample?
Is this rain a Qualifying Storm Event (QSE)?

Qualifying Storm Event (QSE) is a precipitation event that:

  1. Produces a discharge for at least one drainage area; and,
  2. Is preceded by 48 hours with no discharge from any drainage area.

Samples from each discharge location shall be collected within four (4) hours of:

  1. The start of the discharge; or,
  2. The start of facility operations if the QSE occurs within the previous 12-hour period
    (e.g., for storms with discharges that begin during the night for facilities with day-time operating hours).

Sample collection is required during scheduled facility operating hours.

Stormwater Observation Logs