develop consensus standards for use by TNI's programs. This group has a support role in assisting other programs with activities such as guidance and standards interpretation.
fosters the generation of data of known and documented quality is through the National Environmental Laboratory Accreditation Program, or NELAP. The purpose of this program is to establish and implement a program for the accreditation of environmental laboratories.
is to establish and maintain a national PT program to support TNI’s National Environmental Laboratory Accreditation Program, and other activities.
Field Activities Program (NEFAP) Executive Committee is to establish and implement an accreditation program for field sampling and measurement organizations (FSMOs).
Audit Sample Program is to develop consensus standards for the manufacture and analysis of audit samples for source emission testing.
on a variety of topics of interest to the environmental measurement community. TNI also hosts two regularly scheduled meetings per year, typically in January and August. Both are a week long and involve open meetings of TNI committees as well as training courses and other special sessions.Standard Interpretation
Standard: 2009 TNI
Section: V1M4, Section 1.6.2.2 and 1.7.4.2 (b)
REQUEST:
A laboratory in our program states that it is using "marginal exceedences" as part of its evaluation criteria for determining initial demonstrations of capability. The question is "Is the use of 'marginal exceedences' as described for evaluation of laboratory control samples also allowed for the evaluation of data associated with initial demonstrations of capability?" Thank you for your assistance.
TNI FINAL RESPONSE:
(Quality Systems Expert Committee and NELAP AC, 2-24-14)
The 2009 TNI Standard requires that all analytes meet the corresponding acceptance criteria for precision and accuracy stated in the method (if applicable) or in laboratory-generated acceptance criteria (if there is not a reference method with established mandatory criteria) for an Initial Demonstration of Capability (IDOC) prior to the analysis of actual samples. If any one of the analytes does not meet the acceptance criteria, the performance is unacceptable for that analyte.