ATCP 93.050(114)(L)2. 2. “Process tank” or “flow-through process tank” does not include a tank that is used for the storage of materials before their introduction into the production process or for the storage of finished products or by-products from the production process, or a tank that is only used to recirculate materials. A process tank would be considered a storage tank if the vessel is used as storage for a period exceeding 96 hours after the processing ends.

ATCP 93.050 Note Note: Process tanks are outside the scope of this chapter.

ATCP 93.050(114)(m) (m) “Product recovery tank” means a tank that forms an integral part of a ch. ATCP 93 regulated substance spill control system for a storage, processing or transfer area. The purpose of the tank is spill recovery and temporary containment. A product recovery tank does not include a tank that is used for the storage of materials or by-products from a flow-through reclamation process. A product recovery tank will be considered a storage tank if the vessel is used as storage for a period exceeding 96 hours after the control of a release or spill.

ATCP 93.050 Note Note: Product recovery tanks are outside the scope of this chapter.

ATCP 93.050(114)(n) (n) “Residential tank” means a tank located on the same property as a 1- or 2-family dwelling or a residential building that falls within the scope of chs. SPS 361 to 366 and used only by the residents of the property or for the maintenance of the property.

ATCP 93.050(114)(o) (o) “Service tank” means a tank that is used for a limited period of time during the servicing of liquid-bearing equipment, to hold liquids temporarily during the servicing, cleaning or relocation of the equipment.

ATCP 93.050 Note Note: Service tanks are outside the scope of this chapter. Service tanks include the defueling and refueling tanks that are used in commercial aviation environments. These tanks are used for removal of fuel from an aircraft to facilitate other maintenance for the aircraft and for return of that fuel to the aircraft immediately thereafter. They are typically not moved from one site to another and are operated by employees of an aviation service company under aviation service protocols and monitored situations.

ATCP 93.050(114)(p) (p) “Stationary tank” or “fixed tank” means a storage vessel intended for stationary installation and not intended for relocation, loading, unloading, or attachment to a transport vehicle, as part of its normal operation in the process of use.

ATCP 93.050(114)(q) (q) “Storage tank” means a liquid-tight vessel that is intended for fixed or stationary use or a tank that is used for fuel dispensing under subch. VI but is not used for any of the excepted purposes in s. ATCP 93.020 (6). This term includes a vessel which has a liquid capacity of 110 gallons or more and which is assembled and used with an engine as a single unit of equipment.

ATCP 93.050(114)(r) (r) “Work-top tank” means an aboveground steel rectangular tank for combined use as a working surface and a storage tank for Class IIIB liquids.

ATCP 93.050(115) (115) “Tank system” includes the primary tank and pipe, integral secondary containment, integral supports, leak detection, overfill prevention, spill containment, anti-siphon devices, any vapor-recovery system connected to the tank, and the necessary core components that allow the tank system to function as intended and in accordance with the installation requirements. Tank system configurations include onshore underground storage tanks, onshore aboveground storage tanks, and storage tanks over water that are integral with a stationary pier, floating vessel or floating structure for the purpose of storage or vehicle fueling.

ATCP 93.050 Note Note: In a typical fueling island, the dispensing system, as defined in sub. (41), begins immediately downstream of the emergency shutoff valve, and all components upstream of that point, including the shutoff valve, are part of the tank system.

ATCP 93.050(116) (116) “Tank-system integrity assessment” or “TSIA” means the process by which the department seeks to determine if the integrity of a tank system or any component thereof has been compromised. This process includes precision tightness testing, inventory reconciliation, visual inspection of system components, and calibration checks of dispensers and automatic tank gauges.

ATCP 93.050 Note Note: In general, TSIAs are to be performed if there are indications that the integrity of a system has been compromised.

ATCP 93.050(117) (117) “Tank-system site assessment” or “TSSA” means the process by which the department expects tank-system owners or operators to determine if a tank system or any component of that system has released petroleum products or other hazardous substances into the soil, groundwater or surface waters. This process includes all of the following:

ATCP 93.050(117)(a) (a) Observation of field conditions, such as stained soils; odors; pitting, holes or cracks in tank system components; observable leaks; and elevated in-field soil-gas readings.

ATCP 93.050(117)(b) (b) Collection of soil samples for laboratory analysis of petroleum products or other hazardous substances, as prescribed in the department’s Tank System Assessment: A Guide to the Assessment and Reporting of Suspected or Obvious Releases From Underground and Aboveground Storage Tank Systems.

ATCP 93.050(117)(c) (c) Reporting of the field observations and sampling results in a format prescribed by the department.

ATCP 93.050 Note Note: In general, TSSAs are to be performed at the time a storage tank system, or some component thereof, is to be permanently closed, upgraded or repaired, or if a change in service is to take place.

ATCP 93.050 Note Note: Tank System Site Assessment: A Guide to the Assessment and Reporting of Suspected or Obvious Releases From Underground and Aboveground Storage Tank Systems is available from the department’s Web site at https://datcp.wi.gov/Pages/Programs_Services/PetroleumHazStorageTanks.aspx.

ATCP 93.050(118) (118) “Tank vehicle” means a tank truck or trailer system designed and constructed to comply with NFPA 385.

ATCP 93.050 Note Note: NFPA 385 recognizes 3 types of tank vehicles: (1) a tank truck in which the cargo tank is supported entirely on the truck chassis, (2) a tank semi-trailer in which the cargo tank is supported by both the truck chassis and trailer chassis, and (3) a tank full-trailer in which the cargo tank is supported entirely on the trailer chassis.

ATCP 93.050(119) (119) “Tank wagon” means a tank that is affixed to a trailer system with at least one axle, is constructed in accordance with s. ATCP 93.610 (1), has a liquid capacity of 1,100 gallons or less, and is used for storing and dispensing liquid motor vehicle fuel for equipment used on the site, or is used for storing other liquids regulated under this chapter. A tank wagon is not constructed to comply with NFPA 385.

ATCP 93.050 Note Note: Since a tank wagon is not designed and constructed under NFPA 385 criteria, it shall be towed empty on the road for transport and placement in accordance with s. ATCP 93.610 (1).

ATCP 93.050(120) (120) “Temporarily out of service” or “TOS” means a storage tank system that is not in use meets the requirements of s. ATCP 93.445 (1) or 93.545 (1) and is intended to be placed back into use within 24 months.

ATCP 93.050 Note Note: Temporarily out of service does not apply to stationary tanks that are of seasonal use, such as heating fuel storage tanks.

ATCP 93.050(121) (121) “Transfer area” means the area where product is transferred, commonly referred to as loading or unloading, between a storage tank and a transport vehicle. Transfer areas are located at terminals, as well as at end-user and intermediate vendors in the product distribution stream. The transfer area may involve loading racks, pipe stands, or direct hose-to-valve connections, and accommodate top or bottom transfer.

ATCP 93.050(121m) (121m) “Underground storage tank” or “underground tank” has the meaning given in sub. (122) unless the context requires otherwise.

ATCP 93.050(122) (122)