Excavation is where a site actually starts taking shape, cutting into high ground, filling low spots, moving material to where it needs to be. CMJ handles this as its own standalone service or as the front end of a bigger project.
For jobs that need the finished surface to hit an exact tolerance, that's a separate step, see Grading, once the excavation work sets the site up for it.
If the excavation isn't right, we fix it before it becomes the next crew's problem.