On 10/6/10 EE notified sup and sr. sup during a meeting that he had an open Workers' Comp claim for his back. EE alleges that he injured his back on, but is unsure as to the specific date, but says that it occured on one of his dayshifts Sept 22-24, 2010. EE was also not sure as to what event caused his back pain .... This is under investigation ...