NR 664.1031(18)(18) “Hot well” means a container for collecting condensate as in a steam condenser serving a vacuum-jet or steam-jet ejector.

NR 664.1031(19)(19) “In gas or vapor service” means that the piece of equipment contains or contacts a hazardous waste stream that is in the gaseous state at operating conditions.

NR 664.1031(20)(20) “In heavy liquid service” means that the piece of equipment is not in gas or vapor service or in light liquid service.

NR 664.1031(21)(21) “In light liquid service” means that the piece of equipment contains or contacts a waste stream where the vapor pressure of one or more of the organic components in the stream is greater than 0.3 kilopascals (kPa) at 20°C, the total concentration of the pure organic components having a vapor pressure greater than 0.3 kilopascals (kPa) at 20°C is equal to or greater than 20% by weight and the fluid is a liquid at operating conditions.

NR 664.1031(22)(22) “In situ sampling systems” means nonextractive samplers or in-line samplers.

NR 664.1031(23)(23) “In vacuum service” means that equipment is operating at an internal pressure that is at least 5 kPa below ambient pressure.

NR 664.1031(24)(24) “Malfunction” means any sudden failure of a control device or a hazardous waste management unit or failure of a hazardous waste management unit to operate in a normal or usual manner, so that organic emissions are increased.

NR 664.1031(25)(25) “Open-ended valve or line” means any valve, except pressure relief valves, having one side of the valve seat in contact with hazardous waste and one side open to the atmosphere, either directly or through open piping.

NR 664.1031(26)(26) “Pressure release” means the emission of materials resulting from the system pressure being greater than the set pressure of the pressure relief device.

NR 664.1031(27)(27) “Process heater” means a device that transfers heat liberated by burning fuel to fluids contained in tubes, including all fluids except water that are heated to produce steam.

NR 664.1031(28)(28) “Process vent” means any open-ended pipe or stack that is vented to the atmosphere either directly, through a vacuum-producing system or through a tank (e.g., distillate receiver, condenser, bottoms receiver, surge control tank, separator tank or hot well) associated with hazardous waste distillation, fractionation, thin-film evaporation, solvent extraction or air or steam stripping operations.

NR 664.1031(29)(29) “Repaired” means that equipment is adjusted, or otherwise altered, to eliminate a leak.

NR 664.1031(30)(30) “Sampling connection system” means an assembly of equipment within a process or waste management unit used during periods of representative operation to take samples of the process or waste fluid. Equipment used to take non-routine grab samples is not considered a sampling connection system.

NR 664.1031(31)(31) “Sensor” means a device that measures a physical quantity or the change in a physical quantity, such as temperature, pressure, flow rate, pH or liquid level.

NR 664.1031(32)(32) “Separator tank” means a device used for separation of 2 immiscible liquids.

NR 664.1031(33)(33) “Solvent extraction operation” means an operation or method of separation in which a solid or solution is contacted with a liquid solvent (the 2 being mutually insoluble) to preferentially dissolve and transfer one or more components into the solvent.

NR 664.1031(34)(34) “Startup” means the setting in operation of a hazardous waste management unit or control device for any purpose.

NR 664.1031(35)(35) “Steam stripping operation” means a distillation operation in which vaporization of the volatile constituents of a liquid mixture takes place by the introduction of steam directly into the charge.

NR 664.1031(36)(36) “Surge control tank” means a large-sized pipe or storage reservoir sufficient to contain the surging liquid discharge of the process tank to which it is connected.

NR 664.1031(37)(37) “Thin-film evaporation operation” means a distillation operation that employs a heating surface consisting of a large diameter tube that may be either straight or tapered, horizontal or vertical. Liquid is spread on the tube wall by a rotating assembly of blades that maintain a close clearance from the wall or actually ride on the film of liquid on the wall.

NR 664.1031(38)(38) “Vapor incinerator” means any enclosed combustion device that is used for destroying organic compounds and does not extract energy in the form of steam or process heat.

NR 664.1031(39)(39) “Vented” means discharged through an opening, typically an open-ended pipe or stack, allowing the passage of a stream of liquids, gases or fumes into the atmosphere. The passage of liquids, gases or fumes is caused by mechanical means such as compressors or vacuum-producing systems or by process-related means such as evaporation produced by heating and not caused by tank loading and unloading (working losses) or by natural means such as diurnal temperature changes.

NR 664.1032(1)(1) The owner or operator of a facility with process vents associated with distillation, fractionation, thin-film evaporation, solvent extraction or air or steam stripping operations managing hazardous wastes with organic concentrations of at least 10 ppmw shall do any of the following:

NR 664.1032(1)(a)(a) Reduce total organic emissions from all affected process vents at the facility below 1.4 kg/h (3 lb/h) and 2.8 Mg/yr (3.1 tons/yr).

NR 664.1032(1)(b)(b) Reduce, by use of a control device, total organic emissions from all affected process vents at the facility by 95 weight percent.

NR 664.1032(2)(2) If the owner or operator installs a closed-vent system and control device to comply with sub. (1), the closed-vent system and control device shall meet s. NR 664.1033.

NR 664.1032(3)(3) Determinations of vent emissions and emission reductions or total organic compound concentrations achieved by add-on control devices may be based on engineering calculations or performance tests. If performance tests are used to determine vent emissions, emission reductions or total organic compound concentrations achieved by add-on control devices, the performance tests shall conform with s. NR 664.1034 (3).