If the last day's production of crushed aggregate was found nonconforming for gradation, what is a possible remedy the contractor can propose?

The proposed remedy of thoroughly mixing the last day's production of crushed aggregate and retesting is a sound course of action in this scenario. This approach allows for the potential to achieve a more representative sample of the material by combining the nonconforming aggregate with other acceptable material. Mixing serves to even out any inconsistencies in the gradation and could lead to the material meeting the specified requirements after retesting.

This method not only adheres to the standards for quality control but also offers the contractor a practical solution that can salvage the material rather than discarding it outright. If the retest yields a conforming gradation, the contractor can effectively use the material, thereby minimizing waste and potential financial loss related to disposal.

In contrast, other remedies would not rectify the nonconformance effectively. Approving the material based on prior positive test results does not solve the current issue of derailing specifications and could lead to further compliance problems down the line. Asking for a reduction in the gradation requirements undermines the established standards for the project and would potentially compromise the quality and longevity of the roadway. Eliminating the last day's work from the pile may ensure compliance but also represents a waste of resources and financial loss without exploring a solution that could allow the use of existing material.