Cal. Public Resources Code § 43219

(a) The board may, at its discretion, conduct inspections and investigations of solid waste facilities in order to evaluate the local enforcement agency and to ensure that state minimum standards are met. (b) Except as otherwise provided by Section 43220, the board, in conjunction with an inspection conducted by the local enforcement agency, shall conduct inspections of solid waste facilities within the jurisdiction of each local enforcement agency. The board shall inspect the types and number of solid waste facilities which are determined by the board to be necessary to adequately evaluate whether the local enforcement agency is ensuring compliance by solid waste facilities with state minimum standards. A written inspection report shall be prepared and submitted within 30 days of the inspection to the local enforcement agency. (c) If the board identifies any significant violation of state minimum standards that were not identified and resolved through previous inspections by the local enforcement agency, the board shall take appropriate action as authorized by Sections 43215 and 43216.5. (d) Notwithstanding any other provision of this section and Sections 43215 and 43216, if, as a result of a facility inspection conducted pursuant to subdivision (b), the board finds that conditions at a solid waste facility within the jurisdiction of a local enforcement agency threaten public health and safety or the environment, the board shall, within 10 days of notifying the local enforcement agency, become the enforcement agency until another local enforcement agency is designated locally and certified by the board.