Proficiency Testing Program Executive Committee
The purpose of the PT Program Executive Committee is to establish and maintain a national PT program to support a national environmental accreditation program that contains the following elements:
- Fields of Proficiency Testing (analytes, concentrations, matrices and acceptance limits) are appropriate for the scope of environmental monitoring performed in the United States
- All organizations providing PT samples to laboratories are recognized as competent to do so.
The PT Executive Committee consists of 5 to 10 individuals with balanced representation of all stakeholder groups in TNI.
Conference Calls:
PTPEC: 4th Wednesday, 11:00 am ET
Chemistry FoPT Subcommittee: 1st Wednesday, 1:00 pm ET
Contact the Committee Chair or Program Administrator to request to participate in these calls.
Note: On June 9, 2010, this committee was renamed the Proficiency Testing Executive Committee to reflect a change in the TNI bylaws. Documents such as meeting minutes may show the previous name of this committee, Proficiency Testing Board.
| Susan Jackson, Chair SC Department of Environmental Services Columbia, South Carolina [email protected] | Marina Aziz NYS DOH Environmental Laboratory Approval Program Albany, New York [email protected] |
| Nilda Cox Eurofins Eaton Analytical LLC -Pomona Pomona, California [email protected] | Amy DeMarco New York State DOH - ELAP Albany, New York [email protected] |
| Jack Denby Jack Denby Virginia Beach, Virginia [email protected] | Rachel Ellis New Jersey DEP Trenton, New Jersey [email protected] |
| Amanda Fehr GEL Laboratories, LLC Charleston, South Carolina [email protected] | Craig Huff Retired [email protected] |
| Michella Karapondo USEPA Cincinnati, Ohio [email protected] | Tim Miller Phenova Golden, Colorado [email protected] |
| Prasanth Ramakrishnan International Accreditation Service (IAS) Brea, California [email protected] | Patrick Selig ANAB Fort Wayne, Indiana [email protected] |
| Lisa Stafford Eurofins Environmental Testing West Sacramento, California [email protected] | Lisa Stafford Eurofins Environment Testing West Sacramento, California [email protected] |
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Current Projects:
Chemistry FoPT changes
Toxicity FoPT changes
Oversight evaluation of PTOB
Current Needs:

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.