As Georgia Southern University officials await test results to learn more about a suspicious white powder found Tuesday at Lewis Hall, they are also reviewing policy and procedures regarding the way such suspicious incidents are handled. The mysterious substance was sent to a lab in Decatur for further testing Thursday morning after Georgia National Guard HazMat agents tested it on site Wednesday. Inclement weather prevented them from flying the substance to a lab near Atlanta after they removed it from Lewis Hall around 11 p.m. Wednesday, said Betsy Nolen, GSU Assistant Director of Communications.