Preserve the useful detail
For a property concern, compare hot and cold, first draw, several fixtures, duration, neighbors, work history, inventory status, and utility notices.
The decision on display
Do not transfer the hazard
Use the utility for public-supply questions. Do not prescribe treatment or repiping solely from a report table, taste, stain, or system-wide result.
Make the proposed work comparable
Any sampling scope should define location, collection, laboratory, units, benchmark, uncertainty, and how the proposed work addresses the finding.
CURRENT PRIMARY SOURCE