Vehicle repair shops can affect ground water or surface water quality due to various processes, equipment, and substances used on site. Aboveground and underground storage tanks can be used at motorized vehicle repair shops and if not properly maintained, both have the potential to leak hazardous material that can impact ground water or surface water quality. Motor vehicle waste disposal wells (MVWDWs) were sometimes used at repair shops, but are now prohibited in Idaho. An MVWDW is a type of injection well that receives or has received fluids generated during repair and maintenance of motorized vehicles such as automobiles, boats, airplanes, trains, and recreational vehicles. During repair and maintenance activities, fluids such as fuels, oils, and solvents may spill or drip onto the shop floor and enter the injection well potentially causing degradation of the ground water quality over time. Even if MVWDWs are not used, poor housekeeping practices can result in leaks and spills of fuels, oils, solvents, paints, lead acid batteries, and wastewater that can enter stormwater systems and/or be released to ground water. Oil and water separators, catch basins, and other water treatment devices also have the potential to impact surface water and ground water if not used and maintained properly.