[Crossbones]

Again, I have worked in the mining industry for years and this is not a uncommon thing(self rescurers to go bad). Most have a four year shelf life, but that time is cut drastically while being worn on the miners side because of misuse and just being thrown around. What will happen is the mine foreman books will be looked over thouroghly and too see if the rescurers had been shake tested every 45 days. A shake test is a little machine that is straped to the SCSR and you shake it and the machine will tell you if it is bad or not. There are two little windows on the SCSR that are supposed to be blue, if they are pink then the SCSR is bad. But sometimes the windows will stay blue even though the SCSR is still bad. Another thing is the SCSR's were not turned on properly, maybe in a state of panic. And the miners thought they were bad. Could have been several senerios.