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Continued Certification

To maintain certification by the Department a laboratory shall:

- Notify the Department in writing within 30 days of any changes to the following:

  • The name and street address (not P.O. Box) of the Laboratory;
  • The name of the Laboratory Director/Manager;
  • The name of the Laboratory Quality Assurance Officer;
  • Test methods used for certification purposes;
  • Quality Assurance Plan; or
  • Standard Operating Procedures; and

- Document that the Laboratory has successfully analyzed a proficiency testing (PT) sample annually for each test method certification is requested.  PT samples must be purchased from a National Institute of Standards and Technology approved PT provider.  If the results of a PT sample is unacceptable, the laboratory should submit corrective action taken to ensure accuracy of future results.  At least one PT per year must be acceptable for each test method and analyte in which certification is requested.