TNI Logo The NELAC Institute

Workshop Excellence Webinar Series
Quality Assurance and Accreditation

Brown Bag 2: Theoretical and Practical Consideration for Establishing Sensitivity of Measurements
Understanding and Implementing LOD and LOQ and their relationship to MDL and PQL

This 3-hour interactive webcast reviews materials and techniques that laboratories, data users and assessors can use to successfully address the challenges of complying with the TNI Standard, and the 2012 EPA Method Update Rule ( MUR) while implementing effective and scientifically sound practices for measuring sensitivity in environmental analysis. A strong focus will be on understanding the theory, interrelationships and practical considerations associated with LOD, LOQ, MDL and concepts established by Lloyd Curie.

Establishing and maintaining a practical approach for the TNI requirements for LOD/LOQ is one of the most confusing and complicated challenges for laboratory management. A good deal of the confusion centers on "what is needed"," why is it needed" , "how does a small laboratory manage the paperwork" and" how do I reconcile this with the requirements of EPA's method detection limit and the alphabet soup of differing reporting requirements". This workshop explores the origins of method detection and quantitation, the theory behind these concepts and most importantly how to apply these concepts to establishing laboratory practices that are meaningful, scientifically based and compliant with the TNI accreditation requirements.

This workshop is intended to be interactive. This presenters will focus on practical definition and use of these concepts, review of current EPA requirements, the 2009 TNI standard, actual real life options and considerations and suggested processes for evaluating sensitivity and reporting systems. Questions are encouraged and welcome. Several options for participants to provide feedback, including their own experiences, solutions and frustrations will be provided.

This on-demand webcast is a audio/visual recording of a webinar that was recorded on July 27, 2012.

Who Should Watch?

Laboratory QA Managers,
Laboratory Assessors
Data Users
Laboratory Managers

Course Fee:
$74 for TNI members; $84 for all others; $300 group rate

TNI Members: you must belogged-into the website to receive the member rate.

Note:Each purchased webcast is to be viewed by only one student. If you would like multiple viewers, separate purchases must be made. A group rate of $300 is available for groups of 4 or more at a single location.Click hereto purchase this webcast at the group rate.

About Webcasts:
Upon receipt of your payment, you will receive a special link by e-mail to watch the webcast on your computer. The link is time-limited: you will have full access to the webcast and any associated handouts for 6 months after receipt of payment, at which time the link will expire. Webcasts cannot be downloaded; they are intended for viewing on your computer only during the 6-month window. If you have any questions, please contact Ilona Taunton

No certificates are provided with webcasts.  If you wish to receive a Certificate of Attendance for your records, there will be an additional $15 charge per person.  Contact Ilona Taunton at if you need a certificate.


3 hours

Presented By:

Jack Farrell and Jerry Parr

About the Presenter:

Jack Farrell has 34 years of experience in the environmental industry as an analyst, QA professional, technical and general manager of small, medium and large commercial laboratories. He is an experienced environmental manager, laboratory chemist, trainer, and auditor. Mr. Farrell holds degrees in Biological Sciences (Microbiology) and Chemistry and is a professional trainer, consultant and third party assessor for a number of state and federal regulators. Jack Farrell is a Senior Environmental Analyst, President and Founder of Analytical Excellence, Inc. (AEX). Since its inception in 1993, AEX has been an independent strictly confidential consulting firm specializing in environmental laboratory operations, analysis and matters concerning the generation of analytical data to support effective compliance decision-making and aspects of litigation. AEX's clientele consist of well-known small and large laboratory companies, instrument manufacturers, engineering firms, state and federal regulatory agencies and legal practice firms.

Jerry Parr is the Principal Scientist with Catalyst Information Resources, a company focused on providing current relevant information on environmental laboratory issues. He also serves as the Executive Director for The NELAC Institute, serves on the Advisory Board for the Environmental Laboratory Washington Report, and is the conference organizer for the National Environmental Monitoring Conference. He has a BS in Chemistry from the University of Texas at Austin and has 40 years of experience in environmental analytical chemistry. Mr. Parr previously served on EPA's Environmental Laboratory Advisory Board, on the Board of the Environmental Sciences Section of ACIL and on several committees in the National Environmental Laboratory Accreditation Conference. Prior to the formation of Catalyst in 1997, Mr. Parr served as the Director of Government Affairs for Quanterra.