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What Does QC Data Tell Me… and Why Should I Care?


Test methods specify certain QC measures that must be performed. In some cases, there is little information on how to evaluate the results, and there is rarely any justification for performing the measure. Many analysts perform the QC measures because "the method or the TNI Standard requires it", but do not understand the purpose of the measurement, or how the results help to characterize the quality of the related sample set. Moreover, as one university researcher lamented "they don’t teach this stuff in college" which means that understanding QC is learned on the job, if at all.


This course will identify the basic QC measures or concepts, discuss how each should be prepared and the rationale behind the frequency of analysis, and finally, how the results should be evaluated and the significance and impact of the results on the related sample set. The course is based on a combination of essential quality control concepts outlined in TNI ELV1M2 and EPA 40 CFR Part 136.7. Examples from various technical disciplines (radiochemistry, chemistry, etc.) will be used to illustrate how the concept is used in different situations. Completion of the course will provide the attendees with an understanding of why Quality Control Measures are important and will empower them to use the data more effectively in assessing and improving the overall laboratory data quality.


Quality Control Concept and Strategies - how much is too much?
Essential Quality Controls: TNI ELV1M2, EPA 40 CFR Part 136.7

  • What it tells us
  • Why should I care?
  • What do I do?

Audience participation is encouraged! Examples of QC measures in different technical areas, including applicable preparation will be presented for discussion.

$75 for TNI members
$90 for non-members

Group rates are available: 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 $325 for TNI members or $400 for non-members is available for groups of 5-10 students at a single location. Click here to purchase this webcast at the group rate.

TNI Members: you must be logged-in to the website to receive the member rate.

No certificates are automatically provided with this training. A Certificate of Attendance may be purchased for $20 per person during registration or webcast purchase. To receive your certificate, contact Paul Junio at [email protected] with date of purchase and date of training completion. See FAQs for additional information.


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 at [email protected].

3 hours


Presented By:

Silky Labie

About the Presenter:
The principals of ELCAT, LLC collectively have over 70 years of experience in laboratory and field quality management. ELCAT, LLC provides extensive training of laboratory and field personnel in sampling techniques, quality management and training that addresses the requirements of the National Environmental Laboratory Accreditation Program (NELAP). It performs readiness audits for laboratories who desire to improve their quality system for the purposes of NELAP accreditation. ELCAT presents training and presentations on quality-related topics such as method performance, data integrity, corrective and preventive actions, root-cause analysis, data usability, and the role of quality managers. The company is used exclusively by the University of Florida Center for Training, Research & Education for Environmental Occupations (TREEO) for all off-site training of field personnel. It is regularly asked to provide presentations at the Florida Society of Environmental Analysts (FSEA) meetings. ELCAT, LLC has also provided training and presentations for New York City, the State of Virginia, and The NELAC Institute (TNI).