$295 Member/$345 Non-Member

Recorded in June 2020, this course will strengthen your ability to establish relevant health-based limits and evaluate your workplaces.

Because of the industrial and commercial use of thousands of chemicals, IH professionals and others are frequently tasked with developing risk assessments for substances without a quantitative occupational exposure limit (OEL). A significant effort to fill this gap has focused on OEL derivation and occupational exposure banding (OEB) methods.

However, for many chemicals in commerce, these methods are not viable because there is little or no data available on the chemicals' health hazards. This PDC will: a) build on the foundations of the hierarchy of OELs; b) teach how to navigate existing data resources and relevant tools for developing health-based occupational limits for chemicals that lack toxicology data; and c) address three methods (read-across, a threshold of toxicological concern (TTC), hazard correlation).

Course outline

  • Introduction to Strategies to Develop Health-based Guidance for Chemicals Lacking Toxicology Data
  • Review of Toxicology Principles for Limit Setting
  • Key Online and other Resources for Identifying Potential Data for OEL Development Using Similar Chemicals
  • Overview and Evaluation of the Tools for Setting Benchmarks Based on Correlation and Potency Distribution Methods
  • Case Study Approach to Develop OELs Using Alternative Methods

Course outcomes

Upon completion, students will be able to:

  • Identify key resources for finding hazard data relevant to deriving OELs.
  • Apply current frameworks for read-across to select chemical analogs for a chemical.
  • Develop a health-based quantitative limit using correlation methods and the Threshold of Toxicological Concern method.

Who will benefit

IH professionals and others are frequently tasked with developing risk assessments for substances without a quantitative occupational exposure limit (OEL).

Time to complete

Participants will have 90 days from the date of purchase to view the session recordings and submit the online evaluation for credit.


Have questions or need additional information? Contact us.​​​​


Anders Abelmann, MS, PhD, CIH

Dr. Anders Abelmann is a Managing Health Scientist with Cardno ChemRisk and a Certified Industrial Hygienist (CIH). His principal areas of training and expertise include industrial hygiene, exposure and risk assessment, and occupational safety. He has been involved in researching, measuring and reconstructing exposure, and assessing risk to consumers and workers exposed to a variety of chemicals such as diesel particulate matter, carbon monoxide, ethylene oxide, propylene oxide, toluene, styrene, formaldehyde, asbestos, silica, diacetyl, and per- and polyfluoroalkyl substances (PFAS) . Dr. Abelmann completed his doctorate in Public Health, with emphases in industrial hygiene and occupational safety, at the University of Illinois at Chicago. He also holds an MS in Automation & Mechatronics Engineering from Chalmers University of Technology in Gothenburg, Sweden.

William Cyrs, MS, CIH

Mr. William Cyrs is an Industrial Hygienist with ten years of experience. His principal areas of training and expertise include industrial hygiene, exposure assessment, exposure reconstruction, hazard communication, occupational exposure limits, risk assessment, and toxicology. He has managed industrial hygiene and risk assessment aspects of litigation and non-litigation projects and has analyzed data or assessed risk for numerous chemicals with varying degrees of toxicity data.

Andrew Maier, PhD, CIH, DABT, FAIHA

Dr. Andrew Maier is a Senior Managing Health Scientist with Cardno ChemRisk. He is board certified in toxicology (DABT) and industrial Hygiene (CIH). He has extensive experience in occupational exposure limit derivation methods and has developed OELs or similar limits for several hundred individual chemicals. He is a past-Chair of the WEEL Committee, and was a member of the NIOSH work group on exposure banding methods. He has given numerous PDCs and CE courses on occupational risk assessment tools and methods. Dr. Maier completed his doctorate in Toxicology at the University of Cincinnati. He also holds an MS Industrial Health from the University of Michigan.

Rachel Zisook, MS, CIH

Rachel Zisook, MS, CIH is Supervising Health Scientist with 10 years of varied experience in industrial hygiene, exposure assessment, human health risk assessment, and regulatory compliance. She is a board certified industrial hygienist focused on assessing exposure and health risk to workers, communities, and consumers exposed to a variety of chemicals, such as asbestos, silica, metals, polycyclic aromatic hydrocarbons, volatile organic hydrocarbons, diacetyl, polychlorinated biphenyls, pharmaceutical and personal care products, bioaerosols, and perfluorinated compounds.