Which condition is mentioned that does NOT necessitate sampling and testing?

The condition that does not necessitate sampling and testing is associated with the widening of shoulders less than 4.0 feet. This is because minor adjustments, such as adding a small amount of material to existing pavements, typically do not require extensive testing to ensure quality or compliance with specifications. The rationale behind this is that such minor widening efforts are considered to have a lower impact on the overall roadway integrity compared to larger projects which involve significant changes to pavement structure.

In more complex projects, like paving in irregular areas or patching and leveling, the variability of the conditions makes sampling and testing essential to ensure that the materials used meet the necessary standards for performance and longevity. Maintenance tasks may also require testing to ensure that any modifications made will adhere to safety and engineering standards.