I have a customer who wants me to come in and dig a trench about 3 feet away from the exterior walls of his house, he wants the trench about 1 foot deep, then I am to lay weeping tile in the trench, and cover it with crushed rock, the tile will drain out onto the street. I have never heard of weeping tile only being about 1 foot deep, other then for the eavestroughs. He doesn't have water in his basement, but he does have some low spots. I am going to sugest just regrading the yard. Am i wrong?