Exposure Assessment Strategies Committee

We hope to provide current products and services that our committee can offer. Please feel free to contact us with your suggestions or issues regarding exposure assessments and strategies to share with other industrial hygiene, safety and environmental health professionals.

The mission of the Committee is to provide leadership in the field of exposure assessment and strategies for Environmental Health, Safety and Industrial Hygiene professionals.

View the trailer of a video that was shown at the Exposure Assessment Strategies Committee Symposium at PCIH 2009.

During this symposium, participants will learn how to apply these practical tools and strategies through a series of real-life exposure scenario workshops. These workshops will utilize videos, basic characterization information, determinants of exposure, and sampling data for inhalation, dermal, and noise exposures. Participants will learn to make sound qualitative and quantitative exposure judgments, gain a better understanding of how they can apply new skills within their organization, and get direct feedback from seasoned experts. The capstone of the symposium will be a facilitated discussion summarizing lessons learned and identifying new opportunities for exposure assessment methodologies in the future.

Project Teams for Exposure Assessment Strategies Committee  

The Exposure Assessment Strategies Committee has multiple project teams. If you are interested in getting involved, please contact your AIHA Staff Liaison, or a project team leader listed in the spreadsheet.

  • Dermal Team

  • Math Modeling Team

  • Professional Judgment Team

  • 5 Year Strategic Planning Team

  • Data Quality Objectives Team

Tools and Links for Exposure Assessment Strategies   

Are You a Dart-Throwing Monkey?

Find out with this Industrial Hygiene Data Interpretation Game (IHDIG) that you can download on your smartphone or tablet PC? This game illustrates the need for industrial hygienists to use statistical tools every time they interpret sampling data. The IH DIG is a fun app to help Exposure Assessors train their unconscious data interpretation algorithms to better match a Bayesian Likelihood analysis.

IH DIG Mobile Apps

To make sure you are not a Dart-Throwing Monkey, you can purchase the tools to help you with your Data Interpretation:

Exposure Assessment Strategies PDCs

The Exposure Assessment Strategies Committee (EASC) sponsors highly rated and fundamental exposure assessment Professional Development Courses (PDCs) at AIHCE, the AIHA Fall Conference, AIHA local sections and many international occupational hygiene conferences.  Below find descriptions of the course offerings.  PDC number assignment changes each year.  They are listed in a rough order found by members of the EASC to make the most sense in developing fluency in the practice of judging exposure profiles.  Contact AIHA staff or EASC officers for more details on course offerings.

Exposure Assessment Strategies and Statistics

This two-day PDC is designed to provide participants with exposure assessment strategies for the collection and interpretation of occupational exposure monitoring data. It will provide the skills and techniques for developing strategies for effectively managing workplace exposure and monitoring data.  This includes the main elements of exposure risk assessment and management: basic characterization, similar exposure groups (SEGs), define/judge exposure profiles, further information gathering, exposure monitoring strategies, record keeping and reporting, strategies for implementation, statistics review, censored data analysis, and dermal exposure.

Upon completion, the participant will be able to:

  • Demonstrate more efficient uses of monitoring resources

  • Describe practical applications and lessons learned from the implementation of the exposure assessment strategies in the field

  • Conduct a thorough evaluation of exposures and monitoring data

  • Apply statistical tools to assist with decision making regarding the acceptability of exposure risks to employees and management

Bayesian Statistics: Overview and Applications in IH Data Interpretation and Exposure Risk Assessment

The Bayesian statistical framework offers exciting opportunities for improving the accuracy, efficiency, and transparency of our exposure judgments. Bayesian techniques can be used to formally combine our professional judgment regarding a particular exposure and its uncertainty along with the statistical analysis of current exposure data. The language and framework of the approach holds promise for expressing the output of exposure assessments in a manner that is much more easily understood and communicated than the output from more traditional statistical analysis. Best of all, the Bayesian decision analysis approach formalizes traditional exposure assessment processes already used by IHs today.

This course will provide an overview of the Bayesian framework for decision analysis and explore, through discussion and workshops, opportunities for its application in IH data interpretation and exposure-risk assessment. A software program for performing Bayesian decision analysis calculations will be distributed. Note that the software is designed for Windows-based PCs. It will not run on a Macintosh computer without an emulator.

Upon completion, the participant will be able to:

  • Describe a Bayesian framework for exposure assessment decision making

  • List common distributions associated with a Bayesian framework of decision analysis

  • Discuss a Bayesian framework for decision analysis and the AIHA exposure assessment strategy

  • Relate Bayesian decision tools to the implementation of a performance-based exposure risk assessment strategy

  • Use software to perform a Bayesian decision analysis for real world IH monitoring data

Professional Judgment in Exposure Assessment Decision Making

Professional judgment is already an integral component of most occupational exposure assessments. The introduction of Bayesian statistical techniques provides an opportunity to make these judgments transparent and quantitative. This, in turn, provides a potential to improve the accuracy and efficiency of exposure decision making by using a number of professional rules of thumb. Bayesian techniques can be used to formally combine our professional judgment regarding a particular exposure and its uncertainty along with the statistical analysis of current exposure data.

This PDC will focus on several exposure assessment exercises using videos of tasks and basic workplace characterizations. Participants will be led through each scenario and make exposure decisions using their own professional judgments, the rules of thumb, and mathematical exposure models. Participants will learn how these rules of thumb and exposure models improve exposure decision accuracy and efficiency.

Using Mathematical Models to Estimate Exposures

This PDC reviews the basis and application of exposure-modeling techniques to evaluate airborne contaminant concentrations relevant to IH exposure issues. Hygienists can use models to estimate concentrations when monitoring is unavailable, including:

  • Emergency response scenario preplanning

  • Exposure event reconstruct

  • New chemical/process approvals

European REACH legislation is one of the current drivers for model use.

Fundamental laws of chemistry and aerosol science upon which the models are based, and seven of the most common room models will be presented. The benefits and limitations of each model will be discussed. Case studies will illustrate how to use these models and will provide participants with experience in how to select the most appropriate model for their exposure scenario.

Participants will receive:

  • Improved understanding of the determinants of workplace exposure

  • The ability to estimate exposures via mathematical modeling

  • Explanation of the scientific underpinnings of the models and sources of parameters for the models

  • Understand how model output can be integrated into the overall AIHA Exposure Risk Assessment and Management Strategy

Dermal Exposure Assessment

This PDC introduces participants to dermal exposure assessment and presents practical methods for conducting dermal assessments. Techniques and applications cover:  information gathering and dermal guidelines, qualitative exposure assessment, simple models, dermal sampling methods, emerging dermal assessment methods, and a strategy for analyzing information and data collected. Three case studies, each with individual exercises focusing on a particular aspect of the assessment process, demonstrate how techniques presented would be applied. Following the completion of all exercises, instructors discuss how to select the most appropriate assessment techniques for different kinds of substances. Ultimately, participants learn to apply a structured strategy and various techniques to dermal exposure assessments for multiple substances and exposure scenarios.

Upon completion, the participants will be able to:

  • Describe the purpose and physiology of the skin as well as hazards associated with dermal exposures.

  • Select and use existing information resources and exposure guidelines to assess specific dermal exposure scenarios.

  • Understand at a conceptual level how dermal exposure arises.

  • Apply a consistent and comprehensive strategy for assessing dermal exposures. 

  • Use simple mathematical models when appropriate to assess dermal exposures.

  • Identify and describe existing dermal sampling methods and applications.

  • Describe state-of-the art approaches for assessing biologically relevant measures of dermal exposure.

    Design an exposure assessment strategy for a specific dermal exposure scenario using a combination of the techniques and applications described in the course. 

  • Summarize and interpret dermal exposure monitoring data.

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