Press Release

ACGIH® Presents TLVs® and Adjustments due to Workplace Conditions Webinar



Cincinnati, Ohio — September 9, 2008 — ACGIH® will present the first segment of a two-part webinar series, TLVs® and Adjustments due to Workplace Conditions, on October 28, 2008 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 to be used as guidelines in the occupational setting to control health hazards. These TLVs® are intended to be applied at normal temperature and pressure conditions as well as during a typical 8-hour day, 40-hour workweek. In today's dynamic work setting, it is important for occupational health and safety professionals to understand the considerations surrounding the application of the TLVs® during unusual conditions. This webinar will focus on deviations due to the following:

  • Ambient Conditions
    • Temperature
    • Pressure
  • Workplace Conditions
    • Multiple routes of entry
    • Multiple chemical exposures
  • Time and Work Shift Adjustments
    • Extended work shifts
    • Overexposure due to multiple jobs
    • Rotating shifts
Additionally, a review of the approaches to adjusting occupational exposure limits will be discussed, including the methodology and examples of real-time demonstration of the models.

After participating in this webinar, attendees will be better able to understand:

  • The purpose of the TLVs® and the variables that should be considered when modification is needed.
  • How deviations in work conditions affect the application of the exposure limit.
  • The basic principles of pharmacokinetics in relation to the TLVs®.
  • The application of the TLVs® in unusual ambient conditions.
  • The options for comparing air-sampling results to the TLV®.
  • The different approaches to adjusting exposure limits for non-standard work shifts.
  • The risks of overexposure due to unusual workplace conditions.
  • Special considerations that should be given when there is exposure to multiple substances (mixtures).
ACGIH® is pleased to offer webinar attendees a new audio option. U.S. and Canadian attendees can connect to the audio portion of the webinar via the toll-free audio telephone link or listen to the audio portion through an audio stream directly through their computer. Other international participants can listen via the audio stream without incurring additional telephone charges.

Dean R. Lillquist, Ph.D., MSPH, CIH and Douglas N. Wylie, CIH, ROH, CRSP, CRM will present this webinar. David C. May, ScD, CIH, PE serves as Webinar Education Development Coordinator for this webinar.

Dean R. Lillquist, Ph.D., MSPH, CIH is the Director of the USDOL/OSHA Salt Lake Technical Center (SLTC). The SLTC performs OSHA's analytical analysis and sampling and analytical methods development, as well as houses OSHA's Health Response Team, which provides technical and investigative support to the Agency. Prior to OSHA, Dr. Lillquist was Associate Professor and Director of the Industrial Hygiene Graduate Program at the Rocky Mountain Center for Occupational and Environmental Health at the University of Utah. He obtained his Ph.D. degree in Environmental Health from Colorado State University where he focused on industrial hygiene and industrial toxicology. He received his MSPH from the University of Minnesota, School of Public Health. Dr. Lillquist is the current President of the Foundation for Occupational Health and Safety (FOHS).

Douglas N. Wylie, CIH, ROH, CRSP, CRM is a principal and founder of OHG Consulting, which provides occupational hygiene services to Manitoba and Western Canada. With over 25 years of experience, Mr. Wylie was formerly a regulatory inspector with the Manitoba Department of Labour and an Occupational Hygienist with the Department of Occupational and Environmental Medicine at the Health Sciences Centre in Winnipeg, Manitoba, as well as a part-time instructor at the University of Manitoba. He holds a Bachelor's degree in Health Physics from McMaster University in Hamilton, Ontario. Mr. Wylie has been an advocate for adjusting TLVs® for specific conditions since 1993.

David C. May, ScD, CIH, PE is the principal of Concord Cymorth, LLC in Concord, New Hampshire, and is an adjunct faculty member at Keene State College. Dr. May is a member of the ACGIH® Threshold Limit Values for Chemical Substances (TLV®-CS) Committee and has previously served as a member of the ACGIH® Board of Directors. He is certified in the comprehensive practice of industrial hygiene by the American Board of Industrial Hygiene.

This webinar is pending approval by the American Board of Industrial Hygiene (ABIH) for .5 ABIH (IH) Certification Maintenance (CM) Point. This webinar qualifies for .15 BCSP (SP) Continuance of Certification (COC) Point 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 of Completion will be issued in a timely manner after receipt and completion of these items.

The second segment of this series, entitled TLVs® and Adjustments due to Worker Conditions, will address worker conditions including age, gender, and health concerns and is scheduled for late January 2009. Keep an eye on the ACGIH® website for information regarding this webinar.

For more detailed information about the TLVs® and Adjustments due to Workplace Conditions webinar, contact Tammy Vanderbilt at or 513-742-2020.

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
Associate Executive Director