ELEMENT B5 in the NEBOSH Diploma syllabus is titled Hazardous Substances - Monitoring and Maintenance of Control Measures. It has three sub-elements: B5.1 Describe the strategies, methods and equipment for the sampling and measurement of airborne contaminants B5.2 Outline the principles of biological monitoring B5.3 Outline the statutory and other requirements for the monitoring and maintenance of control measures for hazardous substances. Regulation 10 of the Control of Substances Hazardous to Health Regulations 2002 (COSHH) requires employers to monitor exposure at the workplace using a suitable procedure, where the risk assessment indicates that: it is needed to ensure adequate control of the exposure of employees to substances hazardous to health or it is otherwise needed to protect the health of employees. "Suitable procedure" refers to the HSE's series of Methods for the Determination of Hazardous Substances (MDHS) guides, which are all now available at www.hse.gov.uk/pubns/mdhs/index.htm, except MDHS 39/4 -Asbestos Fibres in Air, which is only available as hard copy from HSE Books (www.hsebooks.com).
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