Today we were planting 7 gallon cypresses, 23 of them to be exact with tractor auger. Miss Utility marked all the lines. On the eighth hole I hit a sewage transfer box 5inches below grade. Homeowner offered to pay the $1350 billI want to do whats fair for both of us. What should I do. Homeowner says it isnt my fault and he had no idea the box was there.