Which of the following should be reported if a smaller mass specimen is used for a wash?

Reporting the reason for using a smaller specimen is essential because it provides context for the test results and ensures that the data is interpreted correctly. When a smaller mass specimen is utilized for a wash, it can affect various testing parameters such as the results of particle size distribution, the accuracy of washout percentages, and the representativeness of the sample. By documenting the reason for this choice, such as limitations due to sample availability or specific testing requirements, testers and analysts can better understand how the smaller sample size may influence the outcomes.

The significance of this reporting also lies in maintaining the integrity of the testing process. If discrepancies arise in the results, understanding the size of the specimen and the rationale behind that choice allows for a more thorough evaluation of the data. This practice aligns with established protocols in materials testing, wherein thorough documentation and clear communication about sample handling fosters clarity and reliability in analysis and reporting.

While other factors such as surrounding soil conditions, the specimen's temperature, and anticipated outcomes may be important in different contexts, the most pertinent reporting requirement specifically related to using a smaller mass specimen is indeed the rationale behind that decision.