What information must be attached on the sample tag?

• A. Location; Date & time; Type of sample; Name of sampler; Barometer reading; Any other relevant comments
• B. Date & time only
• C. Type of sample only
• D. Name of sampler only

Answer: (A)

In sample tagging, the essential idea is to attach enough metadata to every sample so its origin, handling, and context are clear to anyone reviewing it. The full set—location, date and time, type of sample, name of sampler, barometer reading, and any other relevant comments—provides that context.

Location anchors where the sample came from, which is crucial for tracing results back to a specific area in the mine or system. Date and time ensure the sample is placed in the correct time window, important for interpreting conditions like ventilation or gas levels that change over time. The type of sample tells the lab exactly what was collected and how to process it, preventing misapplication of tests or standards. The sampler’s name adds accountability—if questions arise, you know who collected it and can follow up appropriately. The barometer reading records atmospheric pressure at collection, which can influence gas concentrations and sample volume, enabling proper adjustment or normalization of results. Any other relevant comments capture unusual conditions or handling notes that could affect interpretation, such as temperature, humidity, or equipment issues.

Options that include only one piece of information miss critical context needed for correct analysis and traceability, so they don’t support reliable interpretation like the full set does.