EE HAD CLIMBED LADDER AT REAR OF GRAIN TRAILER TO OBTAIN A SAMPLE OF MATERIAL LOADED FROM OUR QUICKLIME LOADOUT FACILITY...AS HE WAS DESCENDING THE LADDER, USING A PROPER 3 POINT CONTACT PRO CEDURE, HE SLIPPED AND FELL STRIKING THE SCALES WITH HIS REAR FIRST...THIS WAS LATER DETERMINED TO RESULT IN A HAIRLINE FRACTURE TO THE BOTTOM VERTEBRA. EE CONTINUED WORKING NO LOST TIME OR R