EXAMINER ON PRE-SHIFT EXAM-MW#3 SMELLED SMOKE. SEARCH FOR SOURCE BEGAN IMMEDIATELY. ARRIVING ATMW#4 DRIVE AREA, ENCOUNTERED SMOKE. WATER DELUGESYSTEM WAS IN OPERATION. RETREATED AND RETURNED W/10LB FIRE EXT. DONNED CSE SCSR, ADVANCED TO FIRE AND EXT. AT APPROX. 6:25AM. SHIFT MGR. RE- LIEVED HIM AND COOLED W/FIRE HOSE. ALL SAFETY SYSTEMS ON BELT WERE OPERATIONAL.