RCW 42.56.520 provides that a response to a request for public records must be made by the agency within five business days. The day the request is received does not count as one of the five days. RCW 1.12.040 provides: "The time within which an act is to be done, as herein provided, shall be computed by excluding the first day, and including the last, unless the last day is a holiday, Saturday, or Sunday, and then it is also excluded." The general statute appears to be of application throughout the state statutes. For more information, please call 425-888-1555, ext. 1118.