ASTM D5980

ASTM D5980 is the ASTM standard guide for selecting and documenting existing wells for use in environmental site characterization and monitoring. It provides a practical framework for deciding whether an existing well is suitable for a project and for recording the information needed to support that decision. This matters because well selection can affect the reliability of environmental data, the consistency of field work, and the confidence placed in monitoring results and site assessments.

What is ASTM D5980?

ASTM D5980 is a guide focused on the evaluation and documentation of existing wells that may be used for environmental site characterization and monitoring. Its purpose is to help users make informed choices about whether an existing well can support a project’s data needs and to ensure those decisions are clearly recorded. As an ASTM standard, it is intended to promote consistency in review, selection, and documentation practices while supporting more defensible field and project records.

Where is ASTM D5980 used?

This standard is commonly used in environmental consulting, site investigation, and monitoring programs where existing wells may be considered for sampling or observation. It is relevant when teams need to assess well information, compare field conditions, and document suitability for a specific monitoring purpose. ASTM D5980 is especially useful in workflows that rely on existing infrastructure rather than installing new wells, helping users organize the technical basis for selection and maintain clearer project documentation.

Why is ASTM D5980 important?

ASTM D5980 helps support more consistent decisions when existing wells are being evaluated for environmental work. By encouraging careful selection and documentation, it can reduce uncertainty, improve traceability, and support compliance-oriented project records. The guide is also useful for procurement and quality control because it gives teams a shared reference point for reviewing well suitability and documenting the rationale behind use decisions. In practice, that can help reduce risk and improve confidence in monitoring results.

• Selection of existing wells
• Documentation of suitability
• Environmental site characterization
• Monitoring program support
• Project record consistency