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).
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.Request for Comments on the Revised Draft Standard V4 General Requirements for an Accreditation Body of Environmental Proficiency Test Providers
Date Posted: 7-31-2026
The TNI Proficiency Testing Expert Committee is providing for your review and comment the following documents:
- A revised Draft of TNI EL V4 that has been modified consistent with the Committee's Notice of Intent to Modify (NOI) this Standard and the previously presented Response to Comment document. Click here to view PDF of the revised DS EL V4.
- A Summary of Changes with justification for those changes. Click here to view Word document.