Cal. Government Code § 4005

Within 60 days from the completion of any public work, the engineer shall prepare and file in the office of the clerk of the board of supervisors of the county in which the public work is performed, or if the engineer maintains an office in the county where the work is performed, then in that office, or if any reclamation, irrigation or other district maintains an office, then in the office of his or her own district instead of the office of the clerk of the board of supervisors, the following information in addition to that required by Section 4004: (a) Names of bidders with prices bid, if bids there be. (b) Changes in adopted or approved plans and specifications or a work authorization describing the work to be performed. (c) That the work performed has or has not been done in accordance with these plans and specifications or work authorization. (d) The total cost of the work, segregated so as to show the actual cost of all labor, materials, equipment, engineering or architectural services, including the services of public employees in connection with that work, and other expense. The cost shown for equipment shall include rentals paid or, if the equipment is publicly owned, a reasonable amount for depreciation and the cost of repairs thereon while so used.