CSP practice question: Sampling strategy

Explanation

Full-shift personal sampling with the collection device in the worker's breathing zone best represents what the worker actually inhales across the variation of tasks and locations during the shift. A single area grab sample captures one moment in one place, subjective reports are not quantitative, and outdoor measurements do not reflect the workplace atmosphere. Breathing-zone sampling over the full shift is the standard for representative personal exposure assessment (Ref: NIOSH Manual of Analytical Methods; OSHA).