EXHIBIT 23.1 REPORT OF INDEPENDENT PUBLIC ACCOUNTANTS As independent public accountants, we hereby consent to the incorporation of our report dated January 18, 2002, included in this Form 10-K, into the Company's previously filed Form S-8 Registration Statements No. 33-88704, No. 33-62063, and No. 333-66064. /s/ Arthur Andersen, LLP San Francisco, California February 27, 2002