Proper well purging is essential to ensure the sample represents the formation water rather than casing water sitting in the well. The purgeMethod on a CoCRecord records the approach used — for example, "low-flow (3 casing volumes)" or "volume-based bailer purge." This information is referenced by regulators reviewing your monitoring data quality and appears in the site sampling and analysis plan. Record the actual method applied, including any deviations from the standard protocol, in the notes field.
Technical section
Data model, API, and internals — visible to developers.