AT 7:30 AN EMPLOYEE COMPLAINED OF SEVERE CHEST PAINS VIA THE CB RADIO. CO-WORKER FOUND EE ABOUT ONE MINUTE LATER SLUMPED OVER CONTROLS OF LOADER. SUPERVISOR AND CO-WORKER DETERMINED EE WAS NOT BREATHING AND HAD NO PULSE, PERFORMED CPR UNTIL RELIEVED BY EMT'S. EMPLOYEE TAKEN TO HOSPITAL; PRONOUNCED DEAD @ 8:45 AM.