Combination of knowledge, skills and application experience that enables a person to do an effective and reliable job. It's the employer's responsibility to ensure staff and external suppliers are competent.
Routine and regular checks on an LEV system that ensure it is working properly (controlling exposure). May involve the use of airflow indicators. Should be carried out in addition to the thorough examination and test, by a competent person.
A written document describing the employer's process and where and how airborne contaminants are being generated. Preparation may require expert advice unless a suitable and effective "off the shelf" LEV system exists. Sent to the supplier who should respond with a formal quotation.
A 3-stage complete check of the LEV system, done at least every 14 months (with a few special exceptions). Often done by an external contractor. Whoever does examination should be competent. Involves a physical examination, airflow measurements and professional judgement on performance. Provides a list of prioritised remedial actions to the employer that should be acted upon.