Can you Sample?
Is this rain a Qualifying Storm Event (QSE)?
Qualifying Storm Event (QSE) is a precipitation event that:
- Produces a discharge for at least one drainage area; and,
- 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:
- The start of the discharge; or,
- 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.