Cal. Health & Saf. Code § 25159.25
Any action taken by the department pursuant to this article shall comply with and incorporate any waste discharge requirements issued by the state board or a regional board, and the action shall be consistent with all applicable water quality control plans adopted pursuant to Section 13170 of the Water Code and Article 3 (commencing with Section 13240) of Chapter 4 of Division 7 of the Water Code and with the state policies for water quality control adopted pursuant to Article 3 (commencing with Section 13140) of Chapter 3 of Division 7 of the Water Code, and any amendments made to these plans, policies, or requirements. The department may also include any more stringent requirement which the department determines is necessary or appropriate to protect water quality.
Ca. Health and Saf. Code § 25159.25