EM is dedicated to safely disposing of waste and seeks cost effective and environmentally responsible project execution methods. EM's waste management mission involves planning and optimizing tank waste processing and nuclear materials, including spent nuclear fuel. EM offices that focus on waste management develop policy and guidance and provide technical advice on the tank waste system and nuclear materials. They also provide leadership to planning and executing EM programs for the storage, retrieval, pretreatment, treatment, and final preparation of these materials for disposal and tank closure planning. These EM offices support the EM sites in the execution of this work scope and provide complex-wide integration of the operations and activities associated with these materials.