A joint inspection is defined as an inspection where EPA and either a state or a tribe jointly conduct a compliance inspection activity. The joint inspection can be designed to either train, assist, or do the entire inspection. Joint inspections can be either be an EPA-lead, State-lead, or Tribal-lead. EPA assisted-inspections where the state or tribe formally request assistance are one type of a joint inspection. The purpose of the joint inspection is to determine whether the regulated facility/site is in compliance with its federal and state environmental compliance responsibilities. Joint inspections are not considered oversight inspections. Oversight inspections have a different purpose than joint inspections.