I am a new home owner with a 165 ft deep well (new) I keep getting sand in the house from the well. the builder told us to run the well 12 hours or so to get the sand out. some 30 plus hours later we still have sand. by the way we run the water at the well head. could there be sand in the holding tank that needs to come out first. we need help on this matter this is my fist well .