EE HAD COMPLETED THE TASK OF LOADING SUPPLIES ONTO A TRUCK GOING TO THE JOB SITE. DRIVER OF POWDER TRUCK LOOKED IN HIS SIDE MIRROR & SAW EE LYING ON THE GROUND. HE WENT TO SEE WHAT WAS WRONG A ND COULDN'T GET A VERBAL RESPONSE. 911 WAS CALLED & INITIAL ASSESSMENT FOR BREATHING & PULSE WASPERFORMED. BREATHING & PULSE ABSENT & CPR STARTED. EE TAKEN TO HOSPITAL & PRONOUNCED DEAD(HEART