NR 660.10(112) (112) “Storage” means the holding of hazardous waste for a temporary period, at the end of which the hazardous waste is treated, disposed of or stored elsewhere.

NR 660.10(113) (113) “Subsurface fluid distribution system” means an assemblage of perforated pipes or drain tiles, or any similar conveyance, intended to place or distribute a fluid underground.

NR 660.10(114) (114) “Sump” means any pit or reservoir that meets the definition of tank and those troughs or trenches connected to it that serve to collect hazardous waste for transport to hazardous waste storage, treatment or disposal facilities; except that as used in the landfill, surface impoundment and waste pile rules, sump means any lined pit or reservoir that serves to collect liquids drained from a leachate collection and removal system or leak detection system for subsequent removal from the system.

NR 660.10(115) (115) “Surface impoundment” or “impoundment” means a facility or part of a facility which is a natural topographic depression, human-made excavation or diked area formed primarily of earthen materials (although it may be lined with human-made materials), which is designed to hold an accumulation of liquid wastes or wastes containing free liquids, and which is not an injection well. Examples of surface impoundments are holding, storage, settling and aeration pits, ponds and lagoons.

NR 660.10(116) (116) “Tank” means a stationary device, designed to contain an accumulation of hazardous waste which is constructed primarily of non-earthen materials (e.g., wood, concrete, steel, plastic) which provide structural support.

NR 660.10(117) (117) “Tank system” means a hazardous waste storage or treatment tank and its associated ancillary equipment and containment system.

NR 660.10(118) (118) “TEQ” means toxicity equivalence, the international method of relating the toxicity of various dioxin/furan congeners to the toxicity of 2,3,7,8-tetrachlorodibenzo-p-dioxin.

NR 660.10(119) (119) “Thermal treatment” means the treatment of hazardous waste in a device which uses elevated temperatures as the primary means to change the chemical, physical or biological character or composition of the hazardous waste. Examples of thermal treatment processes are incineration, molten salt, pyrolysis, calcination, wet air oxidation and microwave discharge.

NR 660.10 Note Note: See also “incinerator” and “open burning.”

NR 660.10(120) (120) “Thermostat” means a temperature control device that contains metallic mercury in an ampule attached to a bimetal sensing element, and mercury-containing ampules that have been removed from these temperature control devices in compliance with s. NR 673.13 (3) (b) or 673.33 (3) (b).

NR 660.10(121) (121) “Totally enclosed treatment facility” means a facility for the treatment of hazardous waste which is directly connected to an industrial production process and which is constructed and operated in a manner which prevents the release of any hazardous waste or any constituent thereof into the environment during treatment. An example is a pipe in which waste acid is neutralized.

NR 660.10(122) (122) “Transfer facility” means any transportation-related facility, including loading docks, parking areas, storage areas and other similar areas where shipments of hazardous waste or hazardous secondary material are held during the normal course of transportation.

NR 660.10(123) (123) “Transport vehicle” means a motor vehicle or rail car used for the transportation of cargo by any mode. Each cargo-carrying body (trailer, railroad freight car, etc.) is a separate transport vehicle.

NR 660.10(124) (124) “Transportation” means the movement of hazardous waste by air, rail, highway or water.

NR 660.10(125) (125) “Transporter” means a person engaged in the off-site transportation of hazardous waste by air, rail, highway or water.

NR 660.10(126) (126) “Treatability study” means all of the following:

NR 660.10(126)(a) (a) A study in which a hazardous waste is subjected to a treatment process to determine any of the following:

NR 660.10(126)(a)1. 1. Whether the waste is amenable to the treatment process.

NR 660.10(126)(a)2. 2. What pretreatment (if any) is required.

NR 660.10(126)(a)3. 3. The optimal process conditions needed to achieve the desired treatment.

NR 660.10(126)(a)4. 4. The efficiency of a treatment process for a specific waste or wastes.

NR 660.10(126)(a)5. 5. The characteristics and volumes of residuals from a particular treatment process.

NR 660.10(126)(b) (b) Also included in this definition for the purpose of the s. NR 661.0004 (5) and (6) exemptions are liner compatibility, corrosion and other material compatibility studies and toxicological and health effects studies. A treatability study is not a means to commercially treat or dispose of hazardous waste.

NR 660.10(127) (127) “Treatment” has the meaning given in s. 291.01 (21), Stats. Treatment also includes recovering energy or material resources from the waste.

NR 660.10(128) (128) “Treatment zone” means a soil area of the unsaturated zone of a land treatment unit within which hazardous constituents are degraded, transformed or immobilized.

NR 660.10(129) (129) “Underground injection” or “well injection” means the placement of a fluid or any substance underground through a well.

NR 660.10 Note Note: See also “injection well.”

NR 660.10(130) (130) “Underground tank” means a device meeting the definition of “tank” in this section whose entire surface area is totally below the surface of and covered by the ground.

NR 660.10(131) (131) “Unfit for use tank system” means a tank system that has been determined through an integrity assessment or other inspection to be no longer capable of storing or treating hazardous waste without posing a threat of release of hazardous waste to the environment.