The Environmental Protection Agency conducted emissions-certification and representative emissions test in Ann Arbor, Michigan, in 2005. Subsequently, Harley-Davidson produced an "environmental warranty". The warranty ensures each owner that the vehicle is designed and built free of any defects in materials and workmanship that would cause the vehicle to not meet EPA standards. In 2005, the EPA and the Pennsylvania Department of Environmental Protection (PADEP) confirmed Harley-Davidson to be the first corporation to voluntarily enroll in the One Clean-Up Program. This program is designed for the clean-up of the affected soil and groundwater at the former York Naval Ordnance Plant. The program is backed by the state and local government along with participating organizations and corporations.