California Code, Health and Safety Code - HSC § 25209.18

(a) A person operating a solar evaporator pursuant to a valid notice of authority to operate shall, consistent with subdivision (f) of Section 25209.12, manage the collection and removal of evaporite salt from the solar evaporator as described in the plan prepared pursuant to paragraph (5) of subdivision (a) of Section 25209.13.

(b) If the regional board subsequently determines that accumulated salt needs to be collected and removed from a solar evaporator at a time, or in a manner, that differs from the plan prepared pursuant to paragraph (5) of subdivision (a) of Section 25209.13, the regional board shall notify the operator in writing and describe the reasons for its determination.

(c) An operator of a solar evaporator who receives a notice pursuant to subdivision (b) may appeal the determination of the regional board. The appeal shall include a response, prepared by an independent registered professional civil engineer or agricultural engineer, to the findings in the notice.