endedAt on a PurgeLog closes the purge time window. The elapsed time between startedAt and endedAt multiplied by pumpRateGpm provides an independent check on totalVolumeGallons. Regulatory reviewers comparing purge duration against the calculated volumes removed can identify inconsistencies that might indicate data entry errors or pump rate variations during the purge that should have been documented in stabilizationNotes.
piper
Purge Ended At
`endedAt` on a PurgeLog records when the purge pump was turned off, marking the end of the purge event.