Press Release

ACGIH® Presents ACGIH® TLVs®: Practical Applications in the Workplace Webinar



Cincinnati, Ohio — February 1, 2007 — ACGIH® presents its first webinar of 2007, ACGIH® TLVs®: Practical Applications in the Workplace, scheduled for March 7, 2007 at the following times:

2:00 p.m. – 4:30 p.m. Eastern Time
1:00 p.m. – 3:30 p.m. Central Time
12:00 p.m. – 2:30 p.m. Mountain Time
11:00 a.m. – 1:30 p.m. Pacific Time

The ACGIH® Threshold Limit Values (TLVs®) for Chemical Substances are developed as guidelines to assist in the control of occupational health hazards. These recommendations or guidelines are intended for use in the practice of industrial hygiene. However, these values provoke many questions for the everyday user. The purpose of this webinar is to explore the TLVs® to assist the user in their application in the workplace. This webinar will focus on the following common issues:

  • How are the TLVs® developed and who are the TLVs® intended to protect
  • Proper use of TWAs, STELs, Ceiling and Excursion Limits
  • Proper utilization of TLVs® for occupational risk assessment in the workplace
  • Misuse of the TLVs®
  • Importance of the Documentation in the proper application of TLVs®
  • Purpose and use of particle size selective TLVs®
  • Understanding the carcinogenicity, skin and sensitizer notations
  • Understanding the PNOS exposure guideline
  • Proper evaluation of exposure to mixtures
  • Conversion of TLVs® in ppm to mg/m3
  • Meaning and use of "TLV® Basis"

Specific examples will be used to demonstrate how select TLVs® can be properly applied in the workplace utilizing the variables listed above. Attendees will have the opportunity to ask questions in a real-time setting via a text chat feature.

Upon completion of this webinar, attendees will understand:

  • The purpose of the Threshold Limit Values (TLVs®)
  • The need to review the Documentation when applying the TLV®
  • Strengths and limitations of TLVs®
  • How to apply a TLV® in the workplace
  • How to utilize a TLV® to conduct an occupational risk assessment

The presenters for this webinar are Patrick N. Breysse, PhD, CIH and Ian A. Greaves, MD, BMedSci, MB BS, FRACP, FAAAS. Dr. Breysse is currently a professor in the Department of Environmental Health Sciences at Johns Hopkins University. He is also Director of the Division of Environmental Health Engineering; Program Director of the Industrial Hygiene Training Program; and Director of the Center for Childhood Asthma in the Urban Environment. Dr. Breysse is a long-time member of ACGIH® and has served as a member or board liaison to several committees including: the Threshold Limit Values for Chemical Substances (TLV®-CS) Committee; the Threshold Limit Values for Physical Agents (TLV®-PA) Committee; and the Finance Committee. He also served on the Board of Directors from 2000 through 2004.

Dr. Greaves is Associate Professor of Environmental and Occupational Health at the University of Minnesota School of Public Health and Director of the Midwest Center for Occupational Safety and Health. Dr. Greaves is a member of the ACGIH® Threshold Limit Values for Chemical Substances (TLV®-CS) Committee.

This webinar is pending American Board of Industrial Hygiene (ABIH) approval for .5 ABIH (IH) Certification Maintenance (CM) Points. This webinar qualifies for .15 BCSP (SP) Continuance of Certification (COC) Points for Certified Safety Professionals. Participants seeking CM or COC points must attend the live webinar or view the archive and submit a final exam and evaluation. Certificates will be issued in a timely manner after receipt and successful completion of these items.

For more information and to register for this exciting event, visit the ACGIH® website at

ACGIH® is a member-based organization that advances occupational and environmental health. ACGIH® is one of the industry?s leading publications resources, with approximately 400 titles relative to occupational and environmental health and safety, including the renowned TLVs® and BEIs®. For more information, visit the ACGIH® website at or call our Customer Service Representatives at 513-742-2020.


Amy B. Bloomhuff, Esq., CAE
Director of Operations