The positive growth in acceptance of real-time monitoring continues, yet a common question persists: "Why would I bother with real-time monitoring if it's not regulatory?" Trolex has found that the benefits of real-time monitoring extend far beyond mere regulatory compliance. As part of the ongoing testing and development of the AIR X particulate monitoring range, real-life examples frequently emerge where data collected via real-time monitoring offers in-depth insights into processes and equipment. These insights can reveal unexpected results, and recent testing of the AIR XS unit is no exception.
FIELD TESTING IN REAL-WORLD CONDITIONS
Trolex collaborated with a leading workbench manufacturer to better understand processes involved in generating potentially unsafe working environments due to dust exposure. A simulated kitchen installation was set up to measure exposure to respirable crystalline silica (RCS) during tool use. The current reference method for RCS measurement, a gravimetric sample, was used to determine the average exposure over a 90-minute period.
The operative performed a series of cutting tasks using common tools within the industry: a plunge saw and a cross-cut saw, both equipped with HEPA filters (M Class rating), and a grinder used for dry cutting.
Throughout the test, the gravimetric sample recorded a task-based RCS exposure concentration of 0.191 mg/m³. This equates to an 8-hour Time-Weighted Average (TWA) of 0.036 mg/m³, assuming no further exposure.
THE RESULTS
While the 8-hour TWA of 0.036 mg/m³ might appear unsurprising and below the legal limit for many, the real-time AIR XS readings revealed significantly different exposures during specific tasks:
- PLUNGE SAW: 0.125 mg/m³
- CROSS-CUT SAW: 0.332 mg/m³
- GRINDER: 2.642 mg/m³
This data set highlights the capability of the AIR XS to augment statutory monitoring by providing activity-specific exposure insights in real time, offering a much clearer picture of actual workplace risks.
WHY DOES THIS MATTER?
The 8-hour TWA being below the legal limit is technically true, assuming no further exposure. However, the key takeaway is the stark difference in exposure levels recorded from certain tools over shorter periods. This underscores the importance of selecting the safest tool for the job, understanding the high exposure risk associated with tools like grinders, and being able to manage or eliminate these risks based on total daily use.
The grinder's exposure was nearly nine times higher than the cross-cut saw and over twenty-one times higher than the plunge saw. Even the on-site users were surprised by these figures. While not trained Occupational Health employees, these workers are directly exposed to RCS daily and are responsible for managing and mitigating these risks. For them, this testing served as a valuable learning experience that resonated deeply.
This pattern is common. Incorporating real-time particulate monitoring, especially in environments with multiple processes occurring at various times throughout the workday, can be a lifesaver. It effectively mitigates risks of overexposure and fosters a broader awareness and understanding of potential problems.
Relying solely on gravimetric averages could lead to the assumption that these processes had similar exposure levels, or even favour the use of certain tools for longer periods, dramatically increasing overall exposure during a normal working day.
Data helps employers make better decisions – particularly when it's used correctly.
This principle is a fundamental cornerstone of Trolex's continued development. It drives the evolution of the ambitious AIR X particulate monitoring range and fuels testing efforts to ensure these devices remain useful tools for making workplace environments safer for those at risk of harmful respirable dusts.
