EMPLOYEE WAS SHOVELING 1/4"" PRODUCT ON FLOOR OF DRIER BUILDING. EMPLOYEE STRUCK SHOVEL BLADE INTO CONCRETE CURB WHILE SCOOPING PRODUCT. EMPLOYEE FELT PAIN IN HIS LEFT FOREARM AND WAS RELEASED TO MODIFIED DUTY WITH NO USE OF LEFT ARM AND UPPER LEFT EXTREMITIES. EMPLOYEE RETURNED TO MD ON 10/17/02 AND WAS RELEASED TO FULL DUTY.