Participating laboratories must maintain the following documentation of the processing of proficiency testing materials for review by Department staff as required. Review of this documentation may occur during the on-site survey.
- Each step taken in preparing, processing, examining, testing and reporting all results in the proficiency test event.
- Copies of all testing records, including copies of the proficiency test report forms, for a minimum of 2 years from the date of the test event for all categories, except Forensic Identity, which requires retention for 3 years, and Immunohematology, which requires retention for 5 years.
- The test attestation statements signed by the director and the analyst(s) performing the testing.