Guidelines are presented to be considered by an industrial hygienist in planning a strategy for evaluation of the occupational environment. They include recognition of potential hazards, selection of instruments and their calibration, establishing proper analytical methods, making the field survey, and intepretation of the findings. The hazards may include toxic raw materials and products, air contaminants from various sources, and changes in processes. Job activities and current control measures should be reviewed. Sampling will be determined by the answers to the questions: where, whom, when, how long and how many. The results will be compared with standards and with previous data.
The Industrial Environment - Its Evaluation and Control, NIOSH, Cincinnati, Ohio, Chapter 10