State green lights advanced ambulances at OSF’s Streator ER Tim Stumm 7 years ago OSF can now accept patients needing more advanced care at its freestanding emergency center in Streator after the Division of Public Health revised its regulatory rules. To access this content, you must purchase 1 Year Health News Illinois Subscription or 1 Year Group Subscription - Up to 5 Users, or log in if you are a member.