California Health and Safety Code § 25208.2

For purposes of this article, the following definitions apply: (a) “Active life of the facility” means that period of time when the facility has the potential to adversely affect the waters of the state, but if the owner enters into an agreement with the board to properly close the impoundment on a specified date, the active life of the facility means that period of time up to that specified date. (b) “Background water quality” means the level of concentration of indicator parameters in groundwater that is not, or has not been, affected by any hazardous waste, hazardous waste constituent, or hazardous waste leachate emanating from a particular waste management unit. (c) “Board” or “state board” means the State Water Resources Control Board. (d) “Close the impoundment” means the permanent termination of all hazardous waste discharge operations at a waste management unit and any operations necessary to prepare that waste management unit for postclosure maintenance that are conducted pursuant to the federal Resource Conservation and Recovery Act of 1976 (42 U.S.C. Sec. 6901 et seq.), and the regulations adopted by the state board and the department concerning the closure of surface impoundments. (e) “Constituent” means an element, chemical compound, or mixture of compounds that is a component of a hazardous waste or leachate and has the physical or chemical properties that cause the waste to be identified as hazardous waste by the department. (f) “Discharge” means to place, dispose of, or store liquid hazardous wastes or hazardous wastes containing free liquids into or in a surface impoundment owned or operated by the person who is conducting the placing, disposal, or storage. (g) “Emergency containment dike” means a berm that is located around a tank solely for the purpose of containing any emergency spills from the tank and does not contain any liquid hazardous waste or hazardous wastes containing free liquids for longer than 48 hours. (h) “Facility” means the structures, appurtenances, and improvements on the land, and all contiguous land, that are used for treating, storing, or disposing of hazardous waste. A facility may consist of several waste management units. (i) “Free liquids” means liquids that readily separate from the solid portion of a hazardous waste under ambient temperature and pressure. (j) “Groundwater” means water below the land surface in a zone of saturation. (k) “Hazardous waste” means a waste that is a hazardous waste, as specified in this chapter. ( l ) “Indicator parameters” means the measureable physical or chemical characteristics in groundwater or soil-pore moisture that are likely to be affected by hazardous waste disposal operations and are used, for comparison purposes, to assess the result of hazardous waste disposal operations at a particular waste management unit on the waters of the state. (m) “Landfill” means a facility or part of a facility where hazardous waste is placed in or on land for disposal and that is not a land farm, surface impoundment, or an injection well. (n) “Leachate” means any fluid, including any constituents in the liquid, that has percolated through, migrated from, or drained from, a hazardous waste management unit. (o) “Owner” means a person who owns a facility or part of a facility. (p) “Perched water” means a localized body of groundwater that overlies, and is hydraulically separated from, an underlying body of groundwater. (q) “pH” means a measure of a sample’s acidity expressed as a negative logarithm of the hydrogen ion concentration. (r) “Pile” means any noncontainerized accumulation of solid, nonflowing hazardous waste that is used for the purpose of treatment or storage. (s) “Pollution” has the same meaning as defined in Section 13050 of the Water Code. (t) “Potential source of drinking water” means either water that is identified or designated in a water quality control plan ado

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