Proficiency testing requirements

1. A laboratory shall complete at least one proficiency test successfully for each field of testing for which it applies for certification. The laboratory must complete the proficiency test no more than six months prior to submitting the application. If no proficiency test sample is available for an analyte, the laboratory is exempt from the requirements of this section only for that analyte. 2. Proficiency tests results must be included with the initial or revised certification application required for a primary certification or for reciprocal certification. Proficiency test results also may be reported to the department by the proficiency test provider upon completion of the study.