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Breathing zone samples2/24/2023 A sampling apparatus is provided which comprises a sampler for sampling air in the breathing zone of a wearer of the apparatus and a support for the sampler preferably in the form of a pair of eyeglasses. Additionally, this research identified the possible factors which could contribute to breathing zone concentration variations. The sample apparatus is connected to a pump for drawing air into the apparatus through the tube inlets so that the air passes through the filter. If the section marked Person is filled in. This research revealed that the chest sampler provides a consistent relationship to the concentrations measured at the nose for a given job category. Conventionally, the breathing zone is defined as the zone within a 0.3 m (or 10 inches) radius of a workers nose and mouth, and it has been generally. This form can be used for both area samples or worker (Personal breathing zone, OBZ ) samples as required by OSHA. Styrene air concentrations detected at the nose were significantly different than those concentrations detected at the other three locations and represented 90 percent, 84 percent, and 76 percent of the left lapel, right lapel, and chest samplers, respectively. Two job classes were studied: the spray gun operators and the rolling and tucking operators. An extensive field investigation in a boat manufacturing plant was conducted where styrene air concentrations were measured by mounting four 3M one-stage diffusion samplers around the worker's breathing zone. All units individually calibrated and traceable to NIST. Unit mounted on wheels for easy movement. Elapsed time meter and constant air flow rate permits calculation of accurate sample volume. It has been generally assumed that vapor is uniformly mixed in the breathing zone therefore, samplers are placed on either lapel or on the chest of the worker. Telescoping sampling gooseneck permits easy adjustment to breathing zone levels. This zone is considered to have an airborne chemical concentration equivalent to the concentration breathed by the worker. The glass sorbent tubes are prepared and inserted into a holder before being clipped onto an area near the workers breathing zone. Broadly speaking, the breathing zone sampling apparatus or sampler of the invention includes at least one transport tube connected to a filter assembly and disposed so that the inlet to the transport tube is located in the breathing zone of a wearer of the device. Breathing zone samples are used to estimate worker exposure to airborne contaminants by collecting air from a vaguely defined zone surrounding the head.
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