I see this practice, keeping cylinders in-service beyond their hydro due dates, and I just want to make everyone aware that although this practice may be complaint with 49 CFR Part 180, it sets up the Emergency Response Team (ERT) with a potentially serious Breathing Air (BA) issue during a response. There are two failures, both are quite common finds during our ER audits/assessments, that come together to set up an ERT with the potential issue…