Cal. Health and Safety Code § 25179.10

(a) The department may grant an exemption from the requirements of Section 25179.6 pursuant to subdivision (b) for either of the following: (1) Any special waste which meets the criteria and requirements established for special waste in the regulations adopted by the department and has been classified as a special waste pursuant to the regulations adopted by the department but does not meet the treatment standards established by the department pursuant to Section 25179.6. (2) Any hazardous waste generated in the extraction, beneficiation, or processing of ores and minerals. (b) The department may grant an exemption for a waste specified in subdivision (a) if a person, upon application, demonstrates to the satisfaction of the department that no economically and technologically feasible alternatives exist to recycle, reuse, or treat the waste to meet the treatment standards adopted by the department pursuant to Section 25179.6 and that there will be no migration of hazardous constituents in concentrations which pollute or threaten to pollute the waters of the state from the disposal unit where the waste is to be disposed. An exemption granted pursuant to this subdivision shall remain in effect for five years. The department may renew the exemption if, upon application, it determines that the findings required by the subdivision still apply.