Who is responsible for separating layers of check samples?

The responsibility for separating layers of check samples primarily falls to the contractor. In construction projects, contractors are typically involved in the day-to-day operations and quality control processes, which include the handling of materials and samples. The contractor ensures that check samples are correctly taken and processed according to specifications, which may involve separating layers to analyze specific components or materials effectively.

This role is crucial because it directly impacts the quality assurance of the materials being used and the overall integrity of the project. While other entities like the Department of Transportation, the Quality Assurance team, and the project owner may have oversight or interest in the quality of materials, it is the contractor’s responsibility to handle the practical aspects of sample separation and ensure compliance with regulated standards.