When must a Dust Control Coordinator be present on-site?

• A. For all projects regardless of size
• B. During dust generating operations on sites of 5 acres or more
• C. Only during public complaints
• D. Only when there are visible dust clouds

Answer: (B)

A Dust Control Coordinator must be present on-site during dust-generating operations on sites of 5 acres or more because these larger sites tend to have more significant dust generation potential, which can impact air quality and public health. Having a dedicated coordinator ensures that effective dust control measures are implemented and monitored throughout the duration of the project. This role is crucial in managing compliance with dust control regulations and providing immediate responses to any dust issues that may arise.

In contrast, smaller sites may have different requirements, and the presence of a coordinator might not be mandated to ensure compliance. Additionally, having a coordinator only during public complaints or visible dust clouds wouldn't adequately address potential dust issues before they escalate, which could lead to violations of dust control regulations and negative environmental impacts. The proactive approach of having a coordinator on larger sites allows for better planning and execution of dust control measures, thereby minimizing risks associated with dust emissions.