?:definition
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Samplers designed for obtaining small quantities of one of the components of the surroundings (environment) to which individuals may be exposed. Environmental samplers may be designed especially to take samples from the air, water (either drinking or sewage), and/or soil. Environmental samplers are used mainly to take samples for analysis to determine whether abnormal concentrations of gases (e.g., oxygen, carbon dioxide), hazardous substances (e.g., toxic gases, chemical and biological agents), and/or physical conditions (e.g., high or low temperatures, ionizing radiation, high particle concentration) are present in the environment.
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