A system to manufacture a native soil flowable fill onsite includes hydro excavation equipment having a suction hose. In addition, the system includes a plurality of onsite debris tanks, where each onsite debris tank is configured to be coupled separately to the suction hose and to store native soil vacuumed from an adjacent hole at an onsite excavation. The system also includes a mixing apparatus inside each of the onsite debris tanks configured to mix the native soil from the adjacent hole with additional components to form a native soil flowable fill for the respective adjacent hole.