Silica Exposure Rules now in effect

Exposure Assessment
The new OSHA respirable crystalline silica rule states that workers cannot inhale greater than 50 micrograms per cubic meter of air (50 ug/m3). This refers to dust particles that are small enough to be inhaled and accumulate in the respiratory system. Workplaces need to know what their employees’ exposure levels are to understand if they are meeting the new standard. The only way to know is to measure the air while your workers perform the tasks that could generate airborne silica. Once assessed, employers must use the engineering controls to limit the exposures.

Who can help me?
TTL can help you by providing an Certified Industrial Hygienist who is skilled and experienced to perform the measurements. You will get data that is truly representative of your work place and your workers will know that their potential exposures are being monitored and man aged.

How do I measure the air?
A small, battery-operated pump is connected to plastic tubing and attached to a pre-weighed PVC filter contained in a plastic cassette and placed in a cyclone. The system is calibrated for air flow rate. The worker wears the sample pump and filter assembly for t he work shift. The time sampled should be representative of the tasks performed over an 8 hour work day. Finally, the filter is sent to a qualified laboratory for analysis and results.

Please contact Sara Vogelpohl at or (419) 214-5090 or Timothy G. Pedro at or (419) 214-5050 for more information