0001193125-04-190954 10-Q 4 20040930 20041109 20041109 COLUMBIA BANKING SYSTEM INC 0000887343 6022 911422237 WA 1231 10-Q 34 000-20288 041128692 1102 BROADWAY PLAZA TACOMA WA 98402 2533051900 1102 BROADWAY PLAZA TACOMA WA 98402 10-Q 1 d10q.htm FOR THE QUARTERLY PERIOD ENDED SEPTEMBER 30, 2004 EX-31.1 2 dex311.htm SECTION 302 CEO CERTIFICATION EX-31.2 3 dex312.htm SECTION 302 CFO CERTIFICATION EX-32 4 dex32.htm SECTION 906 CEO AND CFO CERTIFICATION