The most common form of control of airborne substances is local exhaust ventilation (LEV). Under the COSHH regulations there is requirement to assess all LEV systems at regular intervals to ensure they are effective and continue to perform as originally intended.
The examination and testing of LEV systems is clearly defined in the Regulations and associated Codes of Practice, together with the information of equipment, methods, intervals and record keeping.
Newcastle Occupational Health and Hygiene Ltd has a wealth of experience in this area and has assessed a wide range of systems from small portable fume extractors, open face booths, to large multi-branch dust extraction systems and very large blasting and painting halls. ALL forms of LEV can be examined and tested by NOHH Ltd. in compliance with COSHH requirements and recommended practice.
The initial assessment documents the system and examines its components, recording the details of the fans, filtration, ductwork and intakes. It compares the physical system against the design specification, if available.
The testing stage measures, where possible, appropriate parameters, such as in-line velocities, face velocities, capture velocities, static pressures and clearance rates. Other tests can also be undertaken to support the assessment e.g. smoke tubes and dust lamps.
The results obtained are compared with published data and reviewed in the light of personal exposures to substances hazardous to health to determine their effectiveness.
If any system appears unsatisfactory NOHH Ltd will attempt to identify the problem and recommend remedial action to correct the shortfall.
NOHH Ltd will supply a comprehensive report and assessment for each system tested in a clear comprehensible format and in compliance with the requirements of COSHH Reg 9(2).
Most examinations are required at intervals of 14 months, although some are required more frequently. A complementary reminder service is provided to ensure your company has valid assessments at all times.
Contact NOHH Ltd. for comprehensive professional advice on the use and assessment of LEV systems.
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