Direct Push Technology (DPT) unlike rotary drilling, the drill cuttings are not removed from the hole. A direct push machine “pushes” soil sampling tools, instruments, and sensors (soil probes) into the ground without the use of rotary drilling to remove soil to make a path for the tool string. Direct push machines rely on a relatively small amount of static (vehicle) weight combined with percussion as the energy for advancing a tool string. Direct push soil sampling tools do not remove cuttings from the probe hole but depend on compression of soil or rearrangement of soil particles to permit advancement for the tool string. Direct push soil sampling tools or soil probes are advanced with a combination of static weight and percussion. Direct push methods are commonly applied in various subsurface materials such as sands, gravels, hard pans, high friction clays, tills, fill materials, and surface frost.