NR 420.01 History History: Cr. Register, September, 1986, No. 369, eff. 10-1-86; am. Register, February, 1990, No. 410, eff. 3-1-90.

NR 420.02 NR 420.02 Definitions. The definitions contained in chs. NR 400 and 419 apply to the terms used in this chapter. In addition, the following definitions apply to the terms used in this chapter and chs. NR 421 and 425:

NR 420.02(1) (1) “Accumulator” means the reservoir of a condensing unit receiving the condensate from the condenser. This includes hot wells.

NR 420.02(5) (5) “Average monthly storage temperature” means an arithmetic average calculated for each calendar month, or portion thereof if storage is for less than a month, from bulk petroleum liquid storage temperatures determined at least once every 7 days.

NR 420.02(6) (6) “Bottom filling” means the filling of a tank truck or stationary storage tank through an opening that is flush with or near the tank bottom.

NR 420.02(8) (8) “Bulk gasoline terminal” means a gasoline storage facility which receives gasoline from refineries primarily by pipeline, ship, or barge, and delivers gasoline to bulk gasoline plants or to commercial or retail accounts primarily by tank truck.

NR 420.02(9) (9) “Component” means, for purposes of petroleum refineries, any piece of equipment at a refinery which has the potential to leak VOCs. These pieces of equipment include, but are not limited to, pumping seals, compressor seals, seal oil degassing vents, pipeline valves, flanges and other connections, pressure relief devices, process drains, and open ended pipes. Excluded from these pieces of equipment are valves which have no external controls, such as in-line check valves.

NR 420.02(10) (10) “Condensate” means hydrocarbon liquid separated from natural gas which condenses due to changes in the temperature or pressure and remains liquid at standard conditions.

NR 420.02(11) (11) “Condenser” means any heat transfer device used to liquefy vapors by removing their latent heats of vaporization. Such devices include, but are not limited to, shell and tube, coil, surface, or contact condensers.

NR 420.02(13) (13) “Crude petroleum” means a naturally occurring mixture which consists of hydrocarbons; or sulfur, nitrogen and oxygen derivatives of hydrocarbons, and which is liquid at standard conditions.

NR 420.02(14) (14) “Custody transfer” means the transfer of produced crude petroleum or condensate, after processing or treating in the producing operations, from storage tanks or automatic transfer facilities to pipelines or any other forms of transportation.

NR 420.02(15) (15) “Delivery vessel” means a tank truck or trailer or a railroad tank car equipped with a storage tank used for the transport of gasoline from sources of supply to stationary storage tanks of bulk gasoline plants or gasoline dispensing facilities.

NR 420.02(16) (16) “Firebox” means the chamber or compartment of a boiler or furnace in which materials are burned but does not mean the combustion chamber of an incinerator.

NR 420.02(17) (17) “Forebays” means the primary sections of a wastewater separator.

NR 420.02(18) (18) “Fuel gas” means any gas which is generated by a petroleum refinery process unit or by a petroleum liquid transfer operation and which is combusted, or any gaseous mixture of such gas and natural gas which is combusted.

NR 420.02(20) (20) “Gasoline dispensing facility” means any site where gasoline is dispensed to motor vehicle gasoline tanks from stationary storage tanks.

NR 420.02(21) (21) “Gaseous service” means petroleum refinery equipment which processes, transfers or contains a VOC or mixture of VOCs in the gaseous phase.

NR 420.02(22) (22) “Leaking component” means any component at a petroleum refinery which has a VOC concentration exceeding 10,000 ppm when tested in the manner approved by the department.

NR 420.02(23) (23) “Liquid-mounted seal” means a primary floating roof seal mounted in continuous contact with the liquid in a liquid organic compound storage tank between the tank wall and the floating roof around the internal circumference of the tank.

NR 420.02(24) (24) “Liquid service” means petroleum refinery equipment which processes, transfers or contains a VOC or mixture of VOCs in the liquid phase.

NR 420.02(24m) (24m) “Liquid tight” means having a liquid leak rate not exceeding 0.10 gallons per hour when measured with a ±5% accuracy.

NR 420.02(25) (25) “Lower explosive limit” or “LEL” means the lower limit of flammability of a gas or vapor at ordinary ambient temperatures expressed as percent propane in air by volume.

NR 420.02(27) (27) “Petroleum” means the crude oil removed from the earth and the oils derived from tar sands, shale, coal and coke.

NR 420.02(29) (29) “Petroleum refinery” means any facility engaged in producing gasoline, kerosene, distillate fuel oils, residual fuel oils, lubricants or other products through distillation of petroleum or through redistillation, cracking, extraction or reforming of unfinished petroleum derivatives.

NR 420.02(29m) (29m) “Process gas” means any gas generated by a petroleum refinery process unit except fuel gas and process upset gas as defined in this section.

NR 420.02(29p) (29p) “Process upset gas” means any gas generated by a petroleum refinery process unit as a result of startup, shutdown, upset or malfunction.

NR 420.02(30) (30) “Refinery process unit” means any segment of a petroleum refinery in which a specific processing operation is conducted.

NR 420.02(31) (31) “Reid vapor pressure” means the absolute vapor pressure of volatile crude petroleum and volatile nonviscous petroleum liquids except liquefied petroleum gases as determined by ASTM D323-08, incorporated by reference in s. NR 484.10 (6).

NR 420.02(32m) (32m) “Top off” means to attempt to dispense more gasoline to a motor vehicle fuel tank after the vapor recovery dispensing nozzle has shut off.