Which of the following is NOT a component used in site control?

The emphasis on site control within the context of hazardous waste operations and emergency response is fundamental to ensuring worker safety and health. Components such as engineering controls, work practices, and personal protective equipment (PPE) are all primary elements designed to mitigate exposure to hazardous substances and manage risks effectively at a site.

Engineering controls involve the modification of equipment or processes to reduce or eliminate hazards. Work practices consist of the procedures and behaviors that staff must follow to minimize risk while performing tasks. PPE is used as a last line of defense to protect individuals from potential exposure to harmful substances.

In contrast, medical surveillance is not a direct component of site control; rather, it focuses on monitoring the health status of employees who may be exposed to hazardous substances. It aims to identify health effects at an early stage, facilitating timely interventions to protect workers' health. While vital for overall worker safety and health management, medical surveillance does not directly contribute to the immediate strategies used for controlling hazards at a work site. Thus, it is the appropriate choice as the option that is not a component of site control.