YKF NWR - School Underground Storage Tank Assessment This project is to confirm if this is an undocumented underground storage tank that has not been properly assessed and removed. This project will u... YKF NWR - School Underground Storage Tank Assessment This project is to confirm if this is an undocumented underground storage tank that has not been properly assessed and removed. This project will use ground penetrating radar to detect if a tank is present. If a tank is present, than additional testing of soil and groundwater will be conducted to determine if Diesel Regulated Organic (DRO) contamination is present.