Local Exhaust Ventilation is used in many areas from industrial premises through to research laboratories to protect the health of individuals working with hazardous materials. These Local Exhaust Ventilation systems must be maintained in a good working condition in order to effectively remove pollutants from the workplace and dispose of them in a safe manner.
According to USECHH Reg. 2000. , Part V, under clause “Action to Control Exposure” stated a control measure by Application of Engineering Control Equipment requires to maintained, thoroughly examined and tested at regular intervals in order to control exposure adequately.
Section 17. USECHH Reg.2000. Employer should inspect the LEV and GEV at interval not longer than one month once and the LEV and GEV system should examined and tested for its effectiveness by Industrial hygienist at the interval not longer than 12 months. Envosha Hygiene Technicians 2 are well experienced and would be able to carry out task in excellence and within the stated time frame.
Assessment of LEV, including:
Visual inspection of the system in order to determine physical condition.
Smoke test to check leaks in the system.
Measurement of capture velocities, face velocity, duct velocity, static pressure and velocity pressure to determine the dynamic performance of the system.
Provision of an accurate assessment of the level of control exercised over airborne contaminants.
Observation of operators and working procedures to ensure that they are using control measures correctly.
A variety of test methods and equipment are used. These include vane and hot wire anemometers, pitot tubes and smoke visualization tubes. The test results are compared to original design specifications (where available) and guidance given in ACGIH. On completion of the assessment, Envosha provide you with a comprehensive report detailing current legislation, test methods and recommendations for your system.
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