What type of exposure cannot be gathered from air sampling tests?

The reason skin exposure to toxic chemicals cannot be gathered from air sampling tests lies in the nature of the exposure itself. Air sampling is designed to measure airborne contaminants, specifically those suspended in the air that may be inhaled by individuals. This method effectively assesses the concentration of various substances in the air, which can lead to inhalation.

However, skin exposure does not rely on airborne substances but rather direct contact with hazardous materials. Since air sampling measures only what is present in the atmosphere and not what might be in contact with the skin, it cannot provide data on dermal exposure levels. Therefore, this method is not suitable for determining how toxic chemicals may affect individuals through skin contact, making it clear why this type of exposure is excluded from considerations of air sampling outcomes.

In contrast, inhalation, ingestion, and eye exposure are all directly related to airborne or aerosolized materials, which can indeed be measured through air sampling tests, whereas skin contact remains unmeasured in this context.