California Code, Health and Safety Code - HSC § 79320

(a) For purposes of Section 79315, the responsible party shall demonstrate and maintain one or more of the financial assurance mechanisms set forth in subdivisions (a) to (e), inclusive, of Section 66265.143 of Title 22 of the California Code of Regulations.

(b) As an alternative to the requirement of subdivision (a), a responsible party may demonstrate and maintain financial assurance by means of a financial assurance mechanism other than those specified in subdivision (a), if the alternative financial assurance mechanism has been submitted to, and approved by, the department or the regional board as being at least equivalent to the financial assurance mechanisms specified in subdivision (a). The department or the regional board shall evaluate the equivalency of the proposed alternative financial assurance mechanism principally in terms of the certainty of the availability of funds for required operation and maintenance activities and the amount of funds that will be made available. The department or the regional board shall require the responsible party to submit any information necessary to make a determination as to the equivalency of the proposed alternative financial assurance mechanism.