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The primary purpose of site control encompasses a variety of critical functions aimed at maintaining safety and security in areas where hazardous substances are present. One key aspect is reducing the spread of hazardous substances, which is essential to protect both workers and the environment from contamination. Implementing effective site control measures helps to contain any spills or leaks, thus preventing these dangerous materials from spreading further.

Another important function of site control is to facilitate emergency evacuation. In the event of an incident or emergency, having a structured control system in place allows for safe and efficient evacuation of personnel from the site, reducing the risk of exposure to harmful substances.

Additionally, site control measures aim to prevent unauthorized entry, which is crucial to ensure that only trained personnel are allowed access to hazardous areas. This restriction helps to safeguard not only the visitors and unauthorized personnel from potential dangers but also helps to maintain the integrity of the hazardous operations being conducted.

By fulfilling all these roles—reducing the spread of hazardous substances, facilitating emergency evacuations, and preventing unauthorized entry—site control ensures a comprehensive approach to safety management in hazardous environments.