Cal. Health & Safety Code § 18024.5

If the person cited under Section 18024 timely notifies the department that he or she intends to contest the citation, the department shall afford an opportunity for a hearing. The department shall thereafter issue a decision, based on findings of fact, affirming, modifying, or vacating the citation or directing other appropriate relief. The proceedings under this section shall be conducted in accordance with the provisions of Chapter 5 (commencing with Section 11500) of Part 1 of Division 3 of Title 2 of the Government Code, and the department shall have all the powers granted therein.