LEV is used within most joinery workshops to control a wide range of potentially harmful substances which may include wood dust, gases and vapours, fume and solids. The 2002 COSHH Regulations require that thorough examination and testing of LEV systems in woodworking establishments is carried out at least once every 14 months, with records of all tests kept for at least five years. Although testing and maintenance of the equipment represents a cost burden on woodworking companies in these difficult times, with prosecutions of companies failing to control exposure to wood dust continuing at a high level, it is essential that BWF members can demonstrate compliance with their legal obligations in this area.