OES occupational exposure

OES, OCCUPATIONAL EXPOSURE STANDARD (uk) The Concentration of an airborne substance (averaged over a reference period) at which, according to current knowledge, there is no evidence that it is likely to be injurious to employees if they are exposed by inhalation, day after day. (Specified by HSC in Guidance Note EH40.)... 

Dilution of fumes in these areas is generally required for one of two reasons either to reduce the level of harmful (toxic or irritant) fumes to a safe level, normally below the OES (Occupational Exposure Standard) or to dilute offensive odors. Care must be taken with the latter to ensure that the problem is not merely passed on to neighbors. If it is, then a local extract with air-cleaning equipment will be preferred if it is practical. Indeed, a local extract system is always preferable, since it removes the problem at source, resulting in a cleaner environment within the building. 

OES, OCCUPATIONAL EXPOSURE STANDARD (uk) The Concentration of an airborne substance... 

From the Control of Substances Hazardous toHealth (COSHH) Regulations (1988). OES, occupational exposure standard QAC, quaternary ammonium compound. 

OES, occupational exposure standard MEL, maximum exposure limit. MELs are the time-weighted average upper limits of a substance permitted in the breathing zone of a person. OESs are the maximum concentrations of a substance in air to which individuals may be exposed during their working life and at which present knowledge indicates there will be no ill effects. They are often the same as 8-h MELs. 

NSR nitrile-silicone rubber OES occupational exposure standard... 

OES Occupational Exposure Standard. Off Gases. The exhaust or stack gases from a kiln firing ceramics, particularly those that originate from the body being fired or the burnout of binders. 

Occupational exposure standards (OES) U.K, standards relating to the concentration of an airborne substance that can be tolerated without harmful effects on workers over a reference period. See Long term exposure limit (LTEL) and Short term exposure limit (STEL),... 

Mechanical ventilation See Powered ventilation. Natural ventilation A ventilation system in which air movement is produced through purpose-designed openings by natural forces (wind and thermal buoyancy). Occupational Exposure Standards OES) Limits of concentration of airborne toxic contaminants, listed by the Health and Safety Executive which are regarded as safe for prolonged exposure for 8 hours per day. 

In the UK (under the Control of Substances Hazardous to Health Regulations 1988) there are maximum exposure limits (MEL) and occupational exposure standards (OES) ... 

Occupational Exposure Limit (OEL), 81, 82, 111 Occupational Exposure Standard (OES), 16, 112 Odour threshold, 16, 82, 118 Olefins, 35... 

A revised list of maximum exposure limits (MEL), and occupational exposure standards (OES), has been approved by HSC with the exception of dichloromethane, which will remain a maximum exposure limit pending further discussions. Tabulated data are presented of changes to occupational exposure limits with details of new MELs, new OESs, revised OESs, and withdrawn OESs. EUROPEAN COMMUNITY EUROPEAN UNION UK WESTERN EUROPE... 

Such conditions with high carbon black levels would not occur under today s environment of carbon black production plants. Most of the carbon black producing countries have adopted the TLV (Threshold Limit Value) of USA of 3.5 mg/m3 [4.48]. Extensive sampling in a number of carbon black plants in Europe [4.49] provided the results that the occupational exposure standard (OES) for carbon black is 3.5 mg/m3 for an 8-hr TWA (time weighted average) and 7 mg/m3 for the shortterm exposure limit (STEL). 

Fortunately the Health and Safety Executive (HSE) publishes each year a booklet called EH40, which lists the chemicals and dusts that are subject to control. The HSE defines two levels of control the maximum exposure limit (MEL), which must never be exceeded and the occupational exposure standard (OES) which is a realistic target for the workplace. 

The UK introduced a new framework for OELs in 2005. The two limit level system (occupational exposure standards - OES and maximum exposure limits - MEL) of the previous decade was replaced with a single limit (Workplace Exposure Limit -WEL) system in a revised legislative framework for chemical hazards. Under the old system, if the HSE believed a substance merited an DEL, and there was no relevant EU limit, it supplied information on a substance to the Working Group for the Assessment of Toxic Chemicals (WATCH), a sub-committee of the HSC s tripartite Advismy Committee on Toxic Substoces (ACTS) ... 

The COSHH Regulations introduce two new classes of occupational exposure limits maximum exposure limits (MELs) and occupational exposure standards (OESs). Both of these new limits apply to exposure via the inhalation route and will be used in determining whether exposure has been adequately controlled, if it is not feasible to prevent it altogether. For substances that have been given MELs, the level of exposure should be reduced so far as is reasonably practicable and in any event should not exceed the MEL. For substances with OESs it will be sufficient to ensure that the level of exposure is reduced to the OES. ... 

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