Under Mississippi Chapter 13, what is the tolerance zone around a marked underground facility?

1. A 6-inch strip measured only from the center of the mark
2. A strip measured 18 inches, plus one-half the facility diameter if the diameter is indicated, from the outside edge of both sides of the marks
3. 5 feet on each side of every mark, regardless of pipe size
4. There is no tolerance zone; mechanical excavation is allowed on the paint line