Furthermore, we follow Section 7.7 of ISO 17025 for “Ensuring the validity of results.” Pre-defined criteria for acceptance of quality control data are established, and plans are documented in terms of actions to be taken when data is outside of the pre-defined criteria. We have a procedure for monitoring the validity of results, and the resulting data is recorded in such a way that trends are detectable, and where practicable, statistical techniques are applied to review the results. The review of the Log for Test Result Validity is done in the second quarter of each year to ensure that we maintain the highest level of quality control and assurance for our clients.