California Code, Health and Safety Code - HSC § 25169.6

(a) On or before July 1, 2003, the department shall adopt by regulation, and revise as appropriate, a list of hazardous wastes of concern and, for purposes of subdivision (a) of Section 25169.7, the minimum quantity of the hazardous waste of concern that is required to be reported when missing. The list shall include, at a minimum, any hazardous waste that the department, in consultation with the other agencies described in subdivision (b), determines requires special handling restrictions and requirements, beyond those restrictions and requirements generally applicable to hazardous wastes, because of the potential for a hazardous waste of concern to be intentionally and effectively used to harm the public in a terrorist or other criminal act.

(b) The department shall develop the list of hazardous wastes of concern and associated reportable quantities, in consultation with other affected local, state, and federal agencies that have technical expertise on the storage, transportation, and potential hazards of those hazardous wastes.