WEBINAR - Surface Limits: How are They Derived and How Should They be Used in Industrial Hygiene Practice?



This webinar will focus on the Surface Limits (TLV®-SL) recommended by the Threshold Limit Values for Chemical Substances (TLV®-CS) Committee. Surface limits are designed to provide a target level for alternative monitoring strategies for chemical substances that may be absorbed through the skin or eyes or may induce skin or respiratory sensitization following dermal exposure. The webinar is intended to help the practicing industrial hygienist determine what special exposure assessment considerations are needed for these materials to ensure adequate protection of workers. The intent is to give attendees an understanding of surface limits and how they can be used to optimize exposure control programs. The webinar will be comprised of: (1) a brief overview; (2) a discussion of the aims of surface limits; (3) discussion of how TLV®-SL are derived (what information, types of data, and specific criteria are used); and (4) examples of standard wipe sampling methods and other analytical techniques to assess surface contamination levels. “Real-world” scenarios will be used throughout the webinar to illustrate how surface limits are derived and how TLV®-SL should be interpreted and applied by the practicing industrial hygienist.

Learning Objectives

After participating in this webinar, attendees will:

  • Understand the basis for surface limits.
  • Understand how surface limits complement the TLV®-TWAs, TLV®-STELs, and Ceiling values.
  • Know which chemicals need surface limits and how they are derived.
  • Understand standard wipe sampling methods and other analytical techniques to assess surface contamination levels.
  • Will be able to determine how to interpret wipe sample results for their specific workplace.
  • Understand how to incorporate surface limits within a comprehensive exposure control program.

Who Should Attend this Webinar?

Practicing Industrial Hygienists, Industrial Hygiene Analytical Laboratory Personnel, Environmental Health and Safety Professionals, Occupational Toxicologists, and Occupational Physicians

What is an ACGIH® Webinar?

ACGIH® is dedicated to providing quality, scientific, educational events. One method of doing this is to offer distance-learning webinars. A webinar, short for Web-based seminar, is a presentation, lecture, or seminar that is transmitted over the Internet. A key feature of a webinar is its interactive elements — the ability to give, receive and discuss information. Webinars are as effective as on-site presentations without the travel expense. This ACGIH® webinar is 2 hours in duration and consists of a live presentation given via the Internet with an audio telephone link similar to that of a conference call.


This webinar contains 2 contact hours and may be eligible for CIH CM credit. See the ABIH website (abih.org) for CM credit criteria. This webinar may also qualify for CSP recertification points. See the BCSP website (bcsp.org) for details. Participants seeking confirmation of attendance for the webinar from ACGIH® must attend the live webinar or view the archive and submit a final exam and evaluation. Certificates of Completion will be issued in a timely manner after receipt and completion of these items.