Documentation, Reporting, and Interpretation of Results
Documentation that survives review
A defensible report identifies the standard method, date, test locations, slab thickness and probe depth, number of tests, instrument calibration, ambient conditions, equilibration time, and any deviations. Results need units and a clear statement of what was measured-RH or MVER.
Interpretation
Compare each result with the project specification or product limit. F2170 and F1869 are not interchangeable; a low MVER does not prove a low RH, and a high RH does not by itself give an emission rate. Report the highest result and its location rather than only an average, because acceptance often depends on the worst location.
Worked example
Three F2170 results are 78%, 82%, and 91% RH. The arithmetic average is 83.7%, but the controlling value is the 91% maximum. If the product limit is 80% RH, the slab fails even though two locations pass. The report should map the 91% location and recommend further drying and retesting, not conceal it in an average.
Traps
Omitting calibration records, reporting a depth that was not used, mixing RH and MVER units, or failing to note deviations all weaken the report. Never change a result to match a desired conclusion.