What is the minimum sample requirement for placing thin layer, erosion-resistant linings and plastics?

The correct choice indicates that the minimum sample requirement for placing thin layer, erosion-resistant linings and plastics is one sample per applicator per shift. This requirement ensures that the quality of the application can be consistently evaluated throughout the work shift.

By requiring a sample from each applicator, it allows for monitoring of the material application process as well as the skill and technique of individual workers. This is critical in applications where uniformity and adherence to specifications are paramount for performance and longevity of the linings and plastics.

Sampling per shift is practical and ensures that any inconsistencies or issues can be identified and addressed in a timely manner, contributing to quality control on the job site. This method also allows for adjustments to be made based on the performance of each applicator, promoting best practices and enhanced performance in the application of these materials.