CHST Practice Test – Complete Exam Preparation

The most likely source of ionizing radiation that a worker may be exposed to at a construction site is radon within earthen materials. Radon is a naturally occurring radioactive gas that is produced from the decay of uranium in the soil. It can accumulate in buildings, particularly in poorly ventilated areas such as basements, making it a potential hazard for construction workers who spend significant time in or around these sites. The presence of radon is especially relevant in construction activities that involve excavation or any interaction with the ground, as it can release this gas from the earth.

While uranium in building materials, alpha particles from concrete, and x-rays from construction equipment can be considerations in specific contexts, radon is more commonly encountered due to its prevalence in the environment and its ability to seep into enclosed spaces during construction activities. Thus, understanding the risks associated with radon exposure is crucial for maintaining health and safety in construction settings.