The local agency may request the following agencies to utilize that agency’s authority to remedy the effects of, and remove, any hazardous substance which has been released from an underground storage tank:
(a) The department which may take action pursuant to Part 2 (commencing with Section 78000) of Division 45 and, for this purpose, any unauthorized release shall be deemed a release as defined in subdivision (a) of Section 78105.
(b) A regional water quality control board may take action pursuant to Division 7 (commencing with Section 13000) of the Water Code and, for this purpose, the discharged hazardous substance shall be deemed a waste as defined in subdivision (d) of Section 13050.