During low-flow purging, the field technician checks water quality parameters at regular intervals — every 3 to 5 minutes or after each set volume is pumped. Each check is recorded as a PurgeInterval linked to the parent PurgeLog. The PurgeInterval captures recordedAt, cumulativeGallons (how much water has been removed so far), and the current readings for ph, conductivity, temperatureC, dissolvedOxygen, orp, and turbidity. The trend across multiple PurgeIntervals is what demonstrates parameter stabilization and justifies that the well was ready to sample.
Technical section
Data model, API, and internals — visible to developers.