J3: Real-Time Monitoring as Collection of Samples
Tue, 6/2: 5:00 PM - 6:00 PM CDT
Education Sessions
Education Sessions
Ernest N. Morial New Orleans Convention Center
Room: 291
CM Credit Hours: 1
Description
The process of sampling and analysis to quantitatively assess exposures to airborne hazards has changed little since initial methods were developed in the first half of the last century: sampled air is passed through a filter or sorbent at a constant rate and the trapped analyte is quantified in a laboratory setting to determine a time weighted average (TWA) concentration covering the sample period. This approach is still important, especially in measuring exposures to substances where average exposure over time influences chronic health effects, but it is not suitable to identify exposure peaks that occur within a workday. The advent of selective sensors and digitized sensor output opens a new approach to identify such peaks, with the data obtained providing a complete concentration profile across time rather than a single TWA value.
Methods validated by the Occupational Safety and Health Administration are now available for real-time monitoring and evaluation of digitized data to assess such exposure profiles for hydrogen sulfide, carbon monoxide, nitric oxide, chlorine, and carbon dioxide. Evaluations of personal exposure using these methods have found exceedances for acceptable ceiling, peak, and IDLH values that otherwise would not have been detectable, even using the conventional ACGIH model for 15-minute TWA sampling. Exposure scenarios monitored using this approach and plans to continue validation of methods to cover additional analytes will be provided.
Methods validated by the Occupational Safety and Health Administration are now available for real-time monitoring and evaluation of digitized data to assess such exposure profiles for hydrogen sulfide, carbon monoxide, nitric oxide, chlorine, and carbon dioxide. Evaluations of personal exposure using these methods have found exceedances for acceptable ceiling, peak, and IDLH values that otherwise would not have been detectable, even using the conventional ACGIH model for 15-minute TWA sampling. Exposure scenarios monitored using this approach and plans to continue validation of methods to cover additional analytes will be provided.
Learning Outcomes
Upon completion, the participant will be able to:
• Describe the need to measure intra-sampling period peak exposures.
• Describe the inability of TWA sampling to identify exposure peaks.
• Strengthen worker protection by considering previously unidentified peak exposures.
• Integrate the use of currently available real-time detection tools into safety and health programs for collection of data with quality similar to traditional sampling.
• Describe the need to measure intra-sampling period peak exposures.
• Describe the inability of TWA sampling to identify exposure peaks.
• Strengthen worker protection by considering previously unidentified peak exposures.
• Integrate the use of currently available real-time detection tools into safety and health programs for collection of data with quality similar to traditional sampling.
Content Level
Intermediate
Core Competencies
Chemical Sampling and Instrumental Analysis
Exposure Assessment
IH/OH Program Management
Keywords
Exposure Assessment
Gas and vapor detection
OHS Management systems, auditing, and compliance
Real-time detection services and direct reading instruments
Regulatory compliance
Session Availability
In-person
OnDemand
Virtual
Targeted Audience
Practitioner
Transfer of Knowledge
Case Studies
Lecture Only
Practical Application