Air Monitoring and Sampling
Airborne contaminants pose a serious threat to worker health and safety, making air monitoring a critical part of an effective safety and health program. Continuous and accurate air monitoring helps protect employees from exposure to dangerous atmospheres and ensures compliance with OSHA’s HAZWOPER Standard.
Basic Air Sampling Requirements
During initial site entry at uncontrolled hazardous waste sites, the employer must conduct air monitoring to:
- Identify and quantify airborne contaminants both on-site and off-site.
- Track changes in contaminant levels over the course of the project or incident.
- Ensure proper selection of engineering controls, work practices, and personal protective equipment (PPE).
- Determine the required level of worker protection based on exposure risks.
- Define work zones (exclusion, contamination reduction, and support zones).
Predicting and Confirming Airborne Hazards
Airborne hazards can often be anticipated if the following are known:
- The substance involved
- Its chemical and physical properties
- Weather and atmospheric conditions
However, air monitoring is essential to confirm these predictions, measure actual contaminant concentrations, and detect unknown or unexpected pollutants. Reliable monitoring data help employers make informed decisions about worker protection, site control, and emergency response.