When potholing, utility crews use a transportable vacuum excavator. To start with, examination holes, normally measuring six to 12 inches deep, are created together the line wherever they want to dig or start out design. They excavate soil with large-velocity suction straight down till the utility line is partially uncovered. https://objects-us-east-1.dream.io/blissdrive/Bess-Utility-Solutions-Hayward/Potholing-Utilities-Near-Me.html