Cal. Pub. Res. Code § 49020

If an emergency occasioned by default of a contractor or other circumstances which would be detrimental to the public health, safety, or welfare of the inhabitants of the district, the board of supervisors may, without the necessity of advertising for bids, enter into contracts for the disposal of garbage and other refuse for a term not to exceed six months on terms that are necessary or proper, in the exercise of the districts’ power.