Health hazard evaluation report: HETA-98-0289-2742, RMC LONESTAR, San Francisco, California.
NIOSH 1999 Jun; :1-17
The National Institute for Occupational Safety and Health (NIOSH) responded to a joint request from the Building Material & Construction Teamsterís Union Local 216 and the management at RMC LONESTAR to investigate noise exposures to the drivers of the companyís ready-mix concrete trucks. Of particular concern was noise from a data telemetry system in the cab of the trucks that tracked the driverís location. On October 5-9, 1998, investigators from NIOSH traveled to San Francisco, California, to conduct a noise survey at the companyís ready-mix plants. Three days of personal noise dosimetry were obtained along with area noise measurements in the cab of the trucks and the cement plant to characterize the spectral make up of the noise. The RMC LONESTAR hearing conservation program was also reviewed by NIOSH investigators. The analysis of the results determined that the Occupational Safety and Health Administration (OSHA) action level for the implementation of a hearing conservation program was exceeded in most of the sampled truck drivers. The NIOSH recommended exposure limit was surpassed in all personal noise measurements. The specific analysis of the data telemetry system found that the beeps emitted by the device were pure-tone in nature, but not of sufficient intensity to damage the driversí hearing. However, the device did produce many unneeded sounds that could be perceived by the employees as annoying.
Noise; Truck-drivers; Stress; Hearing-protection; Exposure-levels; Sound;
Author Keywords: Ready-Mixed Concrete Production and Distribution; noise; truck drivers; data telemetry system; stress; hearing protection devices
Field Studies; Hazard Evaluation and Technical Assistance
National Institute for Occupational Safety and Health