Part 1 Occupational hygiene: background general approach future challenges content of the book. Part 2 Workplace surveys: scope level of assessment content of assessment assessors priority setting examples of workplace survey protocols. Part 3 Monitoring and measurement methods: monitoring methods measurement methods for chemical agents measurement methods for biological agents dermal exposure quality assurance. Part 4 Exposure modelling: variability stochastic models deterministic models. Part 5 Evaluations based on occupational exposure limits: setting occupational exposure limits characteristics of occupational exposure limits monitoring strategies for compliance. Part 6 Exposure assessment and evaluation in occupational epidemiology: relevant measures of exposure the influence of misclassification of exposure approaches in exposure assessment quantitative exposure assessment. Part 7 Control of occupational exposures: quantitative source assessment control strategy control programme.