LEV = local exhaust ventilation

LEV (Local Exhaust Ventilation | Lokale Absaugung):
Ein Wert für LEV beschreibt die Effektivität, mit der eine Absaugung aus Sicht des Herstellers betrieben werden muss, um eine sichere Verwendung der Chemikalie zu gewährleisten.
https://docs.google.com/viewer?a=v&q=cache:6YdbMovXrPsJ:www....

What is LEV?
Local Exhaust Ventilation (LEV) is known as a method of managing and decreasing the direct exposure of employees to airborne dirt, dust, fumes and vapours which may be hazardous to their health and wellbeing. An example of this could be where an employee is operating a table saw which produces dust from the materials that are being cut. A Local Exhaust Ventilation system would remove the vast majority of that airborne dust through a hood connected to ducting that has suction provided by a fan. This would system would extract the dust from the local area and either discharge it in to a larger filtration system or in to a local filter connected to the LEV system. The clean air is then released back in to the local atmosphere where it poses no hazard to staff and employees.
http://www.levtestingservices.com/levtesting.html?gclid=CNyW...



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Note added at 3 hrs (2013-02-03 10:19:51 GMT)
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http://www.mom.gov.sg/Documents/safety-health/factsheets-cir...

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