AN A320 ENCOUNTERED WAKE TURB IN TRAIL OF HVY JET ON ARR TO LAX.

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WE ENCOUNTERED WAKE TURB FROM A HVY WHILE ON THE SADDE.SADDE6 AVE TRANSITION ARR INTO LAX FOR RWY 24R. WE WERE APPROX 12000 FT MSL IN THE VICINITY OF FILLMORE AND BEHIND THE HVY WITH 9 MI OF SEPARATION. AFTER THE WAKE TURB ENCOUNTER ATC INSTRUCTED US TO SLOW TO 250 KTS AND DSND TO 10000 FT MSL. THE FO (PNF) ADVISED ATC OF THE WAKE TURB ENCOUNTER AND THEN ATC VECTORED US AWAY FROM THE HVY. THE CAPT CHKED IN WITH THE FLT ATTENDANTS AND THEY SAID THEY WERE OK AND NO ONE WAS INJURED. AFTER WE TAXIED TO THE GATE THE FLT ATTENDANTS INFORMED US THAT WE NEEDED A MAJOR CLEANUP OF THE CABIN (FOOD AND DRINKS GOT ON THE INTERIOR OF THE ACFT). SOME PAX HAD DRINKS SPILLED ON THEM. THE CAPT THEN CALLED COMPANY AND INFORMED COMPANY OF THE SITUATION. THE CAPT REQUESTED THAT A SUPVR MEET WITH THE PAX WHO NEEDED ASSISTANCE BECAUSE OF THE FOOD SPILLAGE. THE CAPT AGAIN ASKED THE FLT ATTENDANTS IF ANY ONE OF THE PAX OR THEMSELVES WERE INJURED; THE FLT ATTENDANTS AGAIN REPLIED THAT NO ONE WAS INJURED. ALL PAX WERE OFF THE AIRPLANE WHEN THE CREW DEPLANED.