Vibration 20 exposure action value

The exposure action value (EAV) is a daily amount of vibration exposure, above which employers are required to take action to control exposure. Daily exposure action value is 2.5 m/s. ... 

An exposure limit value must not be exceeded. If an exposure action value is exceeded, then action must be taken to reduce the value. The expression A(8) is added to the exposure limit or action value to denote that it is an average value spread over an 8-hour working day. Thus the daily exposure limit value for hand-arm vibration is 5 m/s A(8). 

This shall not apply where the exposure of an employee to vibration Is usually below the exposure action value but varies markedly from time to time and may occasionally exceed the exposure limit value, provided that ... 

The source of noise and vibration on demolition sites will normally be caused by the use of plant and equipment, falling debris and/or explosives. Compressors, pneumatic hand-held tools, front end loaders, excavators and other equipment can create noise levels of more than the lower exposure action level of 80dB(A) and may at times create peak noise levels of more than 137 dB(C) the lower peak sound pressure action value. A noise assessment will be required and workers given ear defenders. 

The Control of Vibration at Work Regulations introduce, for both hand-arm and whole-body vibrations, a daily exposure limit and action values. These values are as follows ... 

Since the exposure limit or action value is averaged over 8 hours, it is possible to work with higher values for a reduced exposure time. Table 17.3 shows the reduction in exposure time as the size of the vibration increases. 

The Regulations require that where there is a likelihood of WBV, the employer must undertake a risk assessment. The HSE Guidance document, L141, gives detailed advice to help with this risk assessment and on estimating daily exposure levels. Whole-body vibrations risks are low for exposures around the action value and usually only simple control measures are necessary. 

Exposure Limit Value (ELV), as recommended by the Directive 2002/44/EC (European Commission 2002) (Fig. 2). The EAV set the level of vibration that need action (for WBV, EAV = 0,5 m/s ), and ELV set the maximum value must not be exceeded in a single day (for WBV, ELV = 1,15 m/s ). EMB-201 A aircraft applying herbicide showed the lowest RMS VDV, however, the exposure is higher than recommended by standard. Only during loading and refueling RMS VDV stay lower than ELV, reaching EAV in 02 05 hours. 

It is world-wide accepted that discomfort, reduced work efficiency and health impairments are problems found among professionals repeatedly exposed to Whole-Body Vibrations (WBV) (Melo Miguel, 2000 Bernardo, et al., 2014). The risk depends on its intensity and duration. Several standards define procedures for measurement and evaluation of Whole-Body Vibration (WBV), providing limit values and action levels . However, there are no studies demonstrating what is the dose of WBV that can cause any specific disorder related to the magnitude, frequency, direction and duration of vibration exposure (Griffin, 2004). 

The International Organization for Standardization (ISO) standard 2631-1, Mechanical Vibration and Shock Evaluation of Human Exposure to Whole-Body Vibration Part I General Requirements , specify how to measure and analyze WBV. Action limits and exposure limits values are presented in Table 1 (Lewis Johnson, 2012). To further evaluate transient shock vibration exposures in relation to human health, the International Organization for Standardization (ISO) published a new WBV standard, ISO 2631-5, in 2004. Long-term... 

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