pumpRateGpm on a PurgeLog is a critical low-flow sampling parameter. Low-flow protocols require purging at a rate low enough to avoid drawing in water from outside the immediate well screen zone — typically 0.1 to 0.5 GPM. Recording pumpRateGpm demonstrates compliance with the approved sampling protocol. Regulators may scrutinize this value to confirm the correct flow rate was maintained throughout the purge documented in this PurgeLog.
piper
Pump Rate (GPM)
`pumpRateGpm` on a PurgeLog records the flow rate at which the pump extracted water from the well during the purge.