Cal. Health & Safety Code § 25205.16
(a) The department shall establish an identification number certification system to annually verify the accuracy of information related to generators, transporters, and facilities authorized to treat, store, or dispose of hazardous waste. Each entity issued an identification number shall provide or verify the information specified in paragraphs (1) to (9), inclusive, when requested by the department. The system shall include the provision or verification of all of the following information:
(8) An identification of any of the following hazardous waste activities in which the firm or organization is engaged: