Which of the following materials are not included under the Quality Control Plan?

The materials that are typically included in a Quality Control Plan are those that are integral to the construction and structural integrity of projects, such as concrete, asphalt, steel, and timber. These materials have specific standards and performance criteria that need to be met to ensure the quality and compliance of the construction work.

Sod and sealer, while they might be relevant for certain aspects of landscaping or surface treatment, generally do not fall under the standard materials that require rigorous quality control measures like the more structural materials do. This makes sod and sealer less prioritized in the context of a Quality Control Plan, which focuses mainly on materials that significantly impact the safety, durability, and performance of the construction project. Thus, they are not included in the typical scope of a Quality Control Plan.

In summary, while all options list materials relevant to various aspects of construction, sod and sealer do not align with the core focus areas of typical quality control measures, allowing them to be identified correctly as the ones not included.