Well Volume (Gallons)

wellVolumeGallons on a PurgeLog is used to calculate volumesPurged: how many times the standing water in the casing was replaced during purging. It is derived from the well's casing diameter and the pre-purge water depth. Documenting wellVolumeGallons allows compliance reviewers to verify that the volumesPurged ratio meets the protocol's minimum requirement and to cross-check the math against totalVolumeGallons.