Which materials are covered by the Quality Control plan?

The Quality Control plan encompasses specific materials that are essential for construction and infrastructure projects, and the correct answer identifies those key materials effectively. Hot Mix Asphalt, Portland Cement Concrete, and Earthwork are fundamental components of roadway and structural construction, all of which require stringent quality control measures to ensure they meet safety standards, durability, and performance criteria.

These materials are crucial in the context of transportation projects, where the quality directly impacts the longevity and efficiency of the constructed elements. Material certifications, testing, and monitoring procedures outlined in the Quality Control plan are specifically geared towards these types of materials to maintain compliance with regulatory standards and project specifications.

In contrast, other materials mentioned in the incorrect options may not be standard components in most governmental infrastructure and roadwork projects, and thus do not typically fall under the scope of the Quality Control plan in this context. This specificity ensures that the most relevant materials that bear the highest importance in construction quality and safety are monitored effectively.