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: 2003 NELAC
Section: 2
Link to relevant standard
REQUEST:
The SCM PT standard for TPH references HEM/SGT on the FoPT. HEM/SGT is a method defined analyte for method to 1664A. The scope and application section of 1664A says that it is for "surface and saline waters and industrial and domestic aqueous wastes". Therefore, the method has to be modified to be performed on solid and chemical materials. Is it appropriate to have a required PT for a non-standard method?
TNI FINAL RESPONSE:
(PT Board / NELAP Board, x-x-10)
The TNI PT Board does not get involved in questions concerning the appropriateness of methods for specific analytes. Accrediting bodies routinely accredit labs for "non-standard" methods and then require the analysis of PTs included on the FoPT tables. The general answer to your question is, yes, it is appropriate to have a required PT for a non-standard method.