Cal. Pub. Res. Code § 4034

The department, with the consent of the Department of General Services, may lease any real or personal property that the department deems necessary for temporary use of fire station facilities, modular facilities, storage, warehouse, or office purposes when existing departmental facilities are inadequate. This section does not apply when the Department of General Services leases land for the use of the department under Section 14669 of the Government Code.