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.Standard Interpretation
Standard: 2016
Section: V1M4, Section 1.6.3.2
REQUEST:
Section 1.6.3.2 of V1M4 states that the laboratory must determine the acceptance limits for precision and recovery prior to analysis if 4 routine laboratory control samples are used for continuing DOC. Does this allow for the use of marginal exceedance criteria?
TNI FINAL RESPONSE:
The use of marginal exceedance limits are allowed for ODOC as long as the upper and lower marginal exceedance limits have been established for LCS acceptance criteria per V1M4 1.7.3.2 b before the analysis of any of the four LCSs. Note that the use of marginal exceedance may be disallowed by method, regulation or project due to more stringent requirements as specified in V1M2 1.2.