How many check samples are required for each questionable core sample?

The requirement for three check samples for each questionable core sample aligns with quality assurance principles in roadway practices. The rationale behind this standard is to ensure a robust verification process. By collecting three check samples, it allows for a more comprehensive assessment of the questionable core sample's reliability and accuracy. This redundancy helps to identify any anomalies or inconsistencies in the original sample that could impact project outcomes.

Having multiple check samples also aids in achieving statistical relevance. This means that if one or even two samples show discrepancies, the third sample can either confirm these findings or provide reassurance that the original sample was valid. Essentially, the three check samples work together to enhance confidence in the results, reducing the potential for error and ensuring compliance with established quality standards.

This thorough approach is critical in roadway quality management systems, where the integrity of core samples directly influences the safety and durability of road construction.