What is the purpose of a duplicate sample in monitoring?

The purpose of a duplicate sample in monitoring is primarily focused on Quality Assurance/Quality Control. When duplicate samples are taken, they help ensure the reliability and consistency of the test results. By analyzing duplicates, technicians can identify any discrepancies in the data and determine whether the sampling and testing processes are functioning correctly.

Using duplicates allows for the verification of results; if both samples yield similar outcomes, it reinforces the accuracy of the testing methods used. If there are significant differences, it can indicate potential issues in the sample collection process, the analytical method, or even problems with the laboratory equipment. Maintaining high standards of quality is crucial in water monitoring to ensure that any decisions made based on the data are sound and that the water quality meets regulatory standards.

While other options may serve important roles in various aspects of sampling, the primary purpose of a duplicate sample aligns with ensuring quality and reliability in the monitoring data.