7 September 2026

Course Overview

OHTA 501 – Measurement of Hazardous Substances

OHTA 501 focuses on the practical and theoretical aspects of measuring hazardous substances in the workplace. The course builds on the fundamentals learned in OHTA 201 and is designed to develop the skills needed to assess employee exposure to airborne contaminants.

Learning Outcomes

By completing this course, learners gain the competence to plan and conduct exposure assessments, interpret sampling results, and contribute effectively to workplace risk management and control strategies. It’s an essential step toward advanced occupational hygiene certification.

Course

Online

Course Content

Key topics include:

• Principles of sampling and measurement of dusts, fumes, gases, and vapours

• Selection and use of appropriate sampling equipment

• Understanding sampling strategies and data interpretation

• Calibration, quality assurance, and error control

• Evaluating results against occupational exposure limits (OELs)