Cal. Health and Safety Code § 25511

(a) In order to carry out the purposes of this article and Article 2 (commencing with Section 25531), an employee or authorized representative of a unified program agency has the authority specified in Section 25185, with respect to the premises of a handler, and in Section 25185.5, with respect to real property that is within 2,000 feet of the premises of a handler, except that this authority shall include conducting inspections concerning hazardous material, in addition to hazardous waste. (b) In addition to the requirements of Section 25537, the unified program agency shall conduct inspections of every business subject to this article at least once every three years to determine if the business is in compliance with this article. The unified program agency shall give priority, when conducting these inspections, to inspecting facilities that are required to prepare a risk management plan pursuant to Article 2 (commencing with Section 25531). In establishing a schedule for conducting inspections pursuant to this section, the unified program agency may adopt and use an index of the volatility, toxicity, and quantity of regulated substances and hazardous materials. A unified program agency shall attempt to schedule the inspections conducted pursuant to this section and Section 25537, when applicable, during the same time period. (c) Pursuant to a written agreement, the unified program agency may designate the county agricultural commissioner to conduct the inspection of agricultural handlers for purposes of Section 25507.1. The agreement shall address the inspection, reporting, training, enforcement, and cost recovery requirements to conduct the inspection of agricultural handlers. If designated, the agricultural commissioner shall schedule and conduct inspections in accordance with this section.