CONSENT OF INDEPENDENT CERTIFIED PUBLIC ACCOUNTANT We hereby consent to the use in this Registration Statement on Form S-4 for Cerritos Valley Bancorp of our report dated February 28, 1997 relating to the financial statements of Cerritos Valley Bancorp and Subsidiary for the year ended December 31, 1996, and to the reference to our Firm under the caption "Experts" in the Registration Statement. /s/ Vavrinek, Trine, Day & Co. LLP Rancho Cucamonga, California August 10, 1999