ATCP 93.050(55)(55) “Housekeeping” means a facility management activity of keeping flammable, combustible and hazardous liquid storage organized and free of debris, vegetation, combustible goods and merchandise and non-essential combustible materials or products.

ATCP 93.050(57)(57) “Important building” or “important building or structure” means a building or structure that is not considered by the owner, the authorized agent or the department to be expendable in an exposure fire.

ATCP 93.050 NoteNote: Examples include buildings occupied by one or more persons for other than incidental use, buildings that have a high-hazard use where products from fire can harm the community or the environment, control buildings that need the presence of personnel for orderly shutdown of important or hazardous processes, buildings that contain high-value contents or critical equipment or supplies, and buildings that are sited with respect to a storage tank system such that they will have a detrimental effect on release-response or fire-control activities.

ATCP 93.050(58)(58) “Impressed current system” means a method of corrosion protection that generates cathodic current from an external, direct-current power source.

ATCP 93.050(59)(59) “Intermediate bulk container” or “IBC” means a container that is manufactured and marked in accordance with 49 CFR 178, is intended for the storage of regulated substances within warehouses and other storage areas with automatic wet-pipe sprinkler systems, and has a liquid capacity of 793 gallons or less.

ATCP 93.050(60)(60) “Interstitial monitoring” means a leak detection method that entails the surveillance of the space between a tank system’s walls and the secondary containment system for a change in steady-state conditions.

ATCP 93.050(61)(61) “Inventory controls” means techniques used to identify a loss of product that are based on volumetric measurements in the tank and reconciliation of those measurements with product delivery and withdrawal records.

ATCP 93.050(62)(62) “Leak” means any discharge of a regulated substance from a point in a tank system or dispensing system, that is not intended to be a discharge or dispensing point.

ATCP 93.050 NoteNote: See sub. (76) for a definition of “obvious release,” sub. (103) for a definition of “release” and sub. (113) for a definition of “suspected release.”

ATCP 93.050(63)(63) “Leak detection” means determining whether a discharge of a regulated substance has occurred from a point in a storage tank system, that is not intended to be a discharge or dispensing point, such as a discharge into the interstitial space between the primary tank or piping and the secondary barrier or secondary containment around that tank or piping.

ATCP 93.050(64)(a)(a) “Liquid” means any material that has both a fluidity greater than that of 300 penetration asphalt when tested in accordance with ASTM D5 at standard conditions of temperature and pressure, and a vapor pressure of 40 pounds per square inch absolute (psia) or lower at 100°F as determined by ASTM D323 or ASTM D4953, except as excluded under par. (c). For materials outside the scope of the ASTM D5 test, “liquid” means any material that both starts to melt at temperatures less than 100°F and has a vapor pressure of 40 psia or lower at 100°F, except as included under par. (c). In this subsection, “standard conditions of temperature and pressure” means a temperature of 60°F and a pressure of 14.7 psia.

ATCP 93.050 NoteNote: A pressure of 14.7 pounds per square inch absolute is the typical atmospheric pressure at sea level, which varies with changes in altitude and weather. Everyday pressure measurements, such as with a tire-pressure gauge, typically begin with a zero reading at the atmospheric pressure.

ATCP 93.050(64)(b)(b) “Liquid” also means any material that is a viscous substance for which a specific melting point cannot be determined but which is determined to be a liquid in accordance with ASTM D4359, except as excluded under par. (c).

ATCP 93.050(64)(c)(c) “Liquid” does not include any asphalt substance that must be heated to at least 60°F at a pressure of 14.7 pounds per square inch absolute (psia) in order to make it fluid.

ATCP 93.050(65)(65) “Listed and labeled” means equipment or materials to which has been attached a label or identifying mark by, and which is included in a list published by, an organization acceptable to the department that is concerned with product evaluation, that maintains periodic inspections of listed and labeled equipment or materials, and by whose labeling the manufacturer indicates compliance with appropriate standards or performance for a specified purpose.

ATCP 93.050(66)(66) “Local program operator” or “LPO” means an entity, either public or private, under contract with the department to enforce the provisions of this chapter and provide tank system plan review and inspection services in a specific region of the state.

ATCP 93.050(68)(68) “Maintenance” means the normal operational upkeep to prevent a storage tank system from releasing product, or to maintain the structural and operational condition of any portion of the system. Maintenance activity is preventative in nature.

ATCP 93.050(69)(69) “Marine-craft tank vehicle” means any tank having a liquid capacity of 110 gallons or more, used for carrying flammable or combustible liquids and mounted permanently or otherwise upon a vessel or barge capable of water transportation. The tank is not solely for the purpose of supplying fuel for the propulsion of, or support of equipment on, the vessel upon which the tank is mounted.

ATCP 93.050(70)(70) “Mechanical monitoring” means a mechanical device not dependent upon electricity, installed to monitor tanks and piping for leaks.

ATCP 93.050(71)(71) “Monthly monitoring” means an approved electronic or non-electronic method of testing a tank or pipe for a leak at least monthly. The test shall detect a 0.2 gallon per hour leak rate with a probability of detection of 0.95 and a probability of false alarm of 0.05. For purposes of monitoring on a monthly cycle, the department will accept tests no further than 30 days apart.

ATCP 93.050(72)(72) “Motor fuel” means flammable or combustible liquid that is used in the operation of an internal combustion or turbine engine.

ATCP 93.050(73)(73) “Motor vehicle” means a self-propelled motor-driven vehicle that is used for moving people or products on land, water or air, except this term does not include any vehicle which is operated exclusively on a rail. “Motor vehicle” in this definition is intended to apply to motorized equipment transporting people and goods for pleasure, construction or commerce, rather than equipment dedicated to warehousing and yard operations, such as forklifts; or for grounds and facility maintenance, such as lawnmowers; or for amusement facilities, such as go-carts.

ATCP 93.050 NoteNote: Based on this definition, fuel storage tanks on a railroad train or other motorized equipment which operates exclusively on a rail are regulated under this chapter and NFPA 30 as non-vehicle fueling tanks, and NFPA 30A does not apply to them.