ALTDEV ON DSCNT.

Narrative

AT FL350 JUST PRIOR TO DSCNT; PNF NOTIFIED PF THAT HE WAS GOING TO GET THE PDX ATIS INFO WHILE PF WOULD MONITOR ATC COMS. PNF UNDERSTOOD THE ATIS RECORDING TO STATE THE ALTIMETER SETTING TO BE 29.99 WHEN ACTUALLY THE SETTING WAS 29.29. ATC GAVE THE ALTIMETER SETTING SEVERAL MINS BEFORE THE REQUIRED ACTUAL SETTING AT FL180. AT FL180 CREW ACCOMPLISHED APCH CHK AND REFERRED TO COMPANY ATIS FORM FOR THE ALTIMETER SETTING OF 29.99 INSTEAD OF THE ACTUAL 29.29. ACFT DSNDED TO 9000 FT MSL ON ALTIMETER. APCH CTL QUESTIONED CREW FOR ALT STATING HIS EQUIP INDICATED AN ALT OF 8300 FT MSL. A SECOND XPONDER WAS SELECTED WITH SAME ALT READING. APCH CTL THEN STATED ALTIMETER SETTING; AT WHICH TIME CREW REALIZED THE DISCREPANCY; RESET THE ALTIMETER AND CORRECTED TO THE PROPER ALT OF 9000 FT MSL. APCH CTL STATED THERE WAS NO CONFLICT. REMAINDER OF APCH AND LNDG WAS NORMAL. ATC APCH CTL WAS CONTACTED TO EXPLAIN THE SIT. SUPVR STATED THERE WAS NO PROB NOR ANY CONFLICT. CONTRIBUTING FACTORS: 1) ATIS INFO WITH LIKE SOUNDING NUMBERS 29.29 VERSUS 29.99. 2) 2 CREWMEMBER ACFT MONITORING 2 SEPARATE RADIOS WHILE PERFORMING FLYING DUTIES WHICH INHIBITED VERIFICATION OF INFO BY BOTH CREWMEMBERS. POSSIBLE SOLUTIONS: 1) NOTIFY ATC YOU WILL BE OFF HIS RADIO FOR 1 MIN WHILE GETTING ATIS INFO. 2) SLOWER; MORE PRONOUNCED ATIS RECORDINGS. 3) PLT INITIATED ALTIMETER VERIFICATION WITH ATC PASSING FL180 THUS GIVING OR VERIFYING INFO IN A MORE TIMELY MANNER FOR THE PLT.