NAC445A.0634. Participation in proficiency testing program.

     1. Each laboratory for which an application for certification is submitted and each certified laboratory must participate in a proficiency testing program. The laboratory must:

     (a) Obtain single-blind proficiency test samples from a provider approved by a Proficiency Testing Oversight Body/Proficiency Testing Provider Accreditor;

     (b) Analyze the proficiency test samples, if available, for each category of certification and analyte that is included in the program; and

     (c) Report the results of the analysis to the provider specified in paragraph (a).

Ê If the laboratory is a certified laboratory and if a test will be conducted for each category of certification and analyte for which the laboratory is certified, the certified laboratory must analyze a proficiency test sample pursuant to the program not less than once every 6 months.

     2. Each laboratory specified in subsection 1 shall pay the costs of subscribing to a program specified in that subsection.

     3. Each laboratory specified in subsection 1 must satisfactorily analyze each analyte that is included in the program specified in subsection 3 of NAC 445A.0622 on two of the most recent three rounds of testing. Each laboratory shall, before obtaining a proficiency test sample pursuant to paragraph (a) of subsection 1, authorize the provider of the proficiency test sample to submit to the Division the results of any test taken pursuant to the provisions of this section. If the laboratory fails to provide that authorization, the Division may refuse to consider the results of any test taken pursuant to those provisions.

     4. The Division shall consider the results of any test taken pursuant to this section to be satisfactory if the results are within the limits of acceptance established by the provider of the proficiency test samples in accordance with the provisions of Appendix C of chapter 2 of the Standards.

     5. If the Division determines that the results of a test are satisfactory, the laboratory may be certified to use any approved method of testing for each analyte that is satisfactorily analyzed by the laboratory if, as determined by the Division, data sufficient to validate the use of that method of testing on an annual basis are available. If such data are not available, the Division shall deny or revoke certification for that method of testing. As used in this subsection, “data sufficient to validate” means performance of an initial demonstration of capability as defined in section 7.2.8 of the manual specified in paragraph (e) of subsection 1 of NAC 445A.0612.

     6. If a certified laboratory fails:

     (a) Two rounds of testing pursuant to subsection 3, the Division shall suspend the certification of that laboratory for each analyte the laboratory failed to analyze during those rounds; or

     (b) Three rounds of testing pursuant to that subsection, the Division shall revoke the certification of that laboratory for each analyte the laboratory failed to analyze during those rounds.

     7. If the Division suspends the certification of a certified laboratory pursuant to subsection 6 because the laboratory failed two nonconsecutive rounds of testing, the Division shall reinstate the certification of that laboratory for the method of testing an analyte for which the certification was suspended if the certified laboratory satisfactorily analyzes the analyte in a proficiency test sample that is approved by the Division.

     8. If the Division suspends the certification of a certified laboratory pursuant to subsection 6 because the laboratory failed to analyze an analyte on two consecutive rounds of testing, the laboratory must satisfactorily analyze the analyte during each of two consecutive rounds of testing conducted after the Division suspends the certification.

     9. If the Division revokes the certification of a certified laboratory pursuant to subsection 6, the laboratory must:

     (a) Analyze satisfactorily the analyte for which the certification was revoked during each of two consecutive rounds of testing conducted after the Division revoked the certification; and

     (b) Reapply for certification and pay the applicable fees pursuant to the provisions of NAC 445A.0552 to 445A.067, inclusive.

Ê If a certified laboratory complies with the provisions of this subsection and is otherwise qualified for certification pursuant to the provisions of NAC 445A.0552 to 445A.067, inclusive, the Division shall reinstate the certification of the laboratory for each method of testing and analyte for which the laboratory was certified.

     10. Each certified laboratory must comply with the requirements concerning enrollment, testing, conduct and participation in the program specified in subsection 1 pursuant to the provisions of sections 2.4, 2.5 and 2.7 of the Standards.

     11. As used in this section, “Proficiency Testing Oversight Body/Proficiency Testing Provider Accreditor” has the meaning ascribed to it in Appendix A of chapter 1 of the Standards.

     (Added to NAC by Environmental Comm’n by R070-99, eff. 5-26-2000; A by R061-04, 10-7-2004)