Tonight, Company 23 was dispatched to assist Company 59 (Concordville) on a building fire. Rescue 23 and Snorkel 23 responded and staged as the primary RIT team. Crews stood by with no RIT services needed. While on the way home, Company 23 responded to 117 West 4th Street for an odor investigation. Comapny 73 (Rose Tree) was dispatched to assist while we were on the call. Crews found an oil burner backfire and ventilated the building. Thank you to Rose Tree Fire Company for assisting us.