The technical knowledge of
industrial hygiene practice has been divided into sixteen areas: basic, science,
biohazard, biostatistics and epidemiology; engineering controls; non-engineering controls;
ergonomics; ethics and management; analytical chemistry; sampling, monitoring and
instrumentation; noise and vibration; ionizing radiation; nonionizing radiation;
regulations; standards; and guidelines; thermal and pressure stressors; toxicology; and
general IH topics including community exposures, hazardous wastes, risk communication,
indoor environmental quality, and others (unit operations, process safety, and confined
spaces).
Still, there are means of applying this knowledge that differ in
many situations. Application is seen in the recognition of a hazard, the evaluation of the
stressors, in the actual control of the situation, and in industrial hygiene management,
These "domains" of practice differ as one advances through ones career. Recent
efforts to create reasonable standards of practice have led to the development of a code
of ethics for the practice of industrial hygiene. While it does not in itself define
competence, it certainly becomes recognizable when it is absent.