TNI Logo The NELAC Institute

Chemistry Expert Committee

The mission of this committee is to improve the technical quality of environmental testing methodologies by providing tools (e.g., detection, quantitation and calibration) that assure the quality of data, which may be adopted by federal and state regulatory agencies. It is important that a balance between impact on laboratories and improvement in technical quality be maintained during this process.

Conference Calls: 1st Wednesday, 2:00pm - 3:30pm ET

Contact the Committee Chair or Program Administrator to participate in the calls of this committee.

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M. Valerie Slaven, Chair
Valerie Slaven Consulting Services
Sparta, IL
mslaven@teklabinc.com

Ken Jackson, Program Administrator
The NELAC Institute
Ballston Spa, NY
ken.jackson@nelac-institute.org

Jay Armstrong
Virginia Dept.of General Services
Richmond, VA
jay.armstrong@dgs.virginia.gov

Paula Blaze
NJDEP
Trenton, NJ
paula.blaze@dep.state.nj.us

Eric Davis
Austin Water Utility
Austin, TX
Eric.Davis@austintexas.gov

Deb Gaynor
Phoenix Chemistry Services
N. Ferrisburgh, VT
dgaynor@phoenixchemistryservices.com

Shawn Kassner
Neptune Inc.
Lakewood, CO
skassner@neptuneinc.org

Charles Neslund
Eurofins Lancaster Labs Environmental
Lancaster, PA
CharlesNeslund@EurofinsUS.com

Max Patterson
Utah Dept. of Health
Taylorsville, UT
mpatterson@utah.gov

Colin Wright
Florida DEP
Tallahassee, FL
colin.wright@dep.state.fl.us


April 4, 2018
March 7, 2018
February 7, 2018
January 23, 2018

December 6, 2017
November 1, 2017
October 18, 2017
October 4, 2017
August 8, 2017
July 5, 2017
May 5, 2017
March 10, 2017
February 10, 2017
January 24, 2017

November 18, 2016
November 4, 2016
October 21, 2016
October 7, 2016
July 8, 2016
June 24, 2016
May 27, 2016
April 29, 2016
April 1, 2016
March 4, 2016
January 26, 2016
January 15, 2016

December 18, 2015
November 20, 2015
November 6, 2015
October 23, 2015
September 25, 2015
August 7, 2015
July 24, 2015
July 14, 2015
July 10, 2015
April 24, 2015
April 10, 2015
April 2, 2015
March 20, 2015
March 13, 2015
February 27, 2015
February 13, 2015
February 3, 2015
January 23, 2015
January 9, 2015

December 12, 2014
November 14, 2014
October 10, 2014
October 3, 2014
September 19, 2014
September 5, 2014
August 22, 2014
August 4-5, 2014
July 25, 2014
July 11, 2014
June 27, 2014
June 13, 2014
May 30, 2014
May 16, 2014
April 25, 2014
April 11, 2014
March 14, 2014
February 28, 2014

November 22, 2013
November 15, 2013
November 1, 2013
October 17, 2013
October 3, 2013
September 19, 2013
September 5, 2013
June 28, 2013
June 14, 2013
May 31, 2013
May 10, 2013
April 26, 2013
April 12, 2013
March 28, 2013
March 15, 2013
March 1, 2013
February 1, 2013
January 16, 2013
January 4, 2013

December 14, 2012
November 30, 2012
November 16, 2012
November 2, 2012
October 19, 2012
October 5, 2012
September 21, 2012
September 7, 2012
August 24, 2012
August 7, 2012
July 20, 2012
June 22, 2012
June 1, 2012
May 18, 2012
May 4, 2012
April 6, 2012
March 30, 2012
March 2, 2012
February 17, 2012
January 31, 2012
January 6, 2012

December 2, 2011
November 4, 2011
October 7, 2011
September 9, 2011
August 9, 2011
July 8, 2011
June 3, 2011
May 6, 2011
April 1, 2011
March 9, 2011
February 3, 2011
January 7, 2011

December 2, 2010
October 26, 2010

TNI has posted the following document and companion spreadsheet to help laboratories calculate Relative Standard Error as required by Section 1.7.1.1 of Module 4 of the TNI Laboratory Accreditation Standard.

How to Calculate RSE (PDF)

RSE Calculation Spreadsheet (Excel)


Definition and Procedure for the Determination of the Method Detection Limit (PDF)