Cal. Health & Safety Code § 5413

Whenever the state department finds that a pollution or nuisance does, in fact, exist, that condition shall be immediately referred by the state department to the proper regional board for action, together with any recommendations for correction, and, commencing July 1 of a year in which the Legislature has appropriated sufficient funds for this purpose, the state department shall submit any report required pursuant to subdivision (d) of Section 13193 of the Water Code. Upon request of a regional board, the state department shall inspect and report to the board on any technical factors involved in any condition of pollution or nuisance.