CA AB474

Exempts spent brine solutions from groundwater treatment (used to meet California drinking water standards) from hazardous waste requirements if specific conditions are met

Requires spent brine solutions be transferred via closed piping system to lined surface impoundments regulated by California regional water quality control boards and approved by the applicable board

Mandates spent brine solutions be treated with technology rendering them nonhazardous for all contaminants except selenium, with bird mitigation measures approved by the Department of Fish and Wildlife

Requires operators of surface impoundments to maintain financial assurances consistent with hazardous waste control law requirements

Specifies that waste removed from impoundments becomes subject to hazardous waste requirements if determined to be hazardous, and untreated spent brine solutions must be managed under existing hazardous waste law