ATCP 93.050(4m)(4m) “Airport hydrant system” means an underground storage tank system which fuels aircraft and operates under high pressure with large diameter piping that typically terminates into one or more hydrants (fill stands). The airport hydrant system begins where fuel enters one or more tanks from an external source such as a pipeline, barge, rail car, or other motor fuel carrier.

ATCP 93.050(5)(5) “Alteration” means any modification to an installed tank system that involves cutting, drilling or welding on the tank shell or associated piping.

ATCP 93.050(6)(6) “Ancillary equipment” means any device, including such devices as piping, fittings, flanges, valves, and pumps, that is used to distribute, meter, or control the flow of regulated substances to and from a storage tank.

ATCP 93.050(9)(9) “ATV” or “all-terrain vehicle” means a self-propelled motor-driven vehicle with wheels or tracks, used to transport people on land, snow, ice or water for purposes of sport or recreation and which cannot be licensed through the department of transportation for highway use.

ATCP 93.050(9m)(9m) “Authority having jurisdiction” means the department or an authorized agent responsible for approving equipment, installations or procedures.

ATCP 93.050(10)(10) “Authorized agent” means either a local program operator or a 1st class city or the authorized representatives of a 1st class city.

ATCP 93.050 NoteNote: See sub. (66) for a definition of local program operator. As of November 1, 2019, only the City of Milwaukee is a 1st class city.

ATCP 93.050(11)(11) “Automatic leak detection” means a release or leak detection or monitoring system that will provide continuous 24 hour monitoring for the detection of a release or leak of vapor or product and immediately communicate the detection of the release or leak to an electronic signaling device.

ATCP 93.050(12)(12) “Automatic line leak detection” means a method of leak detection which alerts the operator to the presence of a leak without any manual effort on the part of the operator, including a device or mechanism that signals the presence of a leak by restricting or shutting off the flow of a hazardous substance through piping, or by triggering an audible or visual alarm, and which detects leaks of 3 gallons per hour at 10 psi line pressure within one hour.

ATCP 93.050(14)(14) “Biodiesel fuel” means a fuel that is comprised of monoalkyl esters of long chain fatty acids derived from vegetable oils or animal fats.

ATCP 93.050 NoteNote: Under s. 168.14 (2m) (b) 2., Stats., pure biodiesel fuel is generally identified with the alphanumeric B100, and does not contain any petroleum product, any additive, or other foreign material. A fuel that is a blend of biodiesel and petroleum-based fuel generally has a volume percentage of the biodiesel fuel to the petroleum-based fuel of at least 2 percent. B20 would identify a blend as being 20 percent biodiesel and 80 percent petroleum-based fuel, by volume.

ATCP 93.050(15)(15) “Bulk plant” means that portion of a facility where flammable, combustible or hazardous liquids are stored or blended in bulk for the purpose of subsequently distributing such liquids beyond that portion of the facility. This term does not include a facility where such liquids are stored or blended only in intermediate bulk containers.

ATCP 93.050(16)(16) “Business day” means any day Monday to Friday, excluding Wisconsin legal holidays.

ATCP 93.050(17)(17) “CERCLA” means the federal Comprehensive Environmental Response, Compensation, and Liability Act of 1980, as amended.

ATCP 93.050(18)(18) “Certified cathodic protection tester” means a person certified in accordance with this chapter who demonstrates an understanding of the principles and measurements of all common types of cathodic protection systems as applied to buried or submerged metal piping systems and metal tanks.

ATCP 93.050(19)(19) “Certified corrosion expert” means a person certified in accordance with this chapter who is qualified to engage in the practice of corrosion control on buried or submerged metal piping systems and metal tanks by reason of thorough knowledge of the physical sciences and the principles of engineering and mathematics acquired by a professional education and related practical experience.

ATCP 93.050(21)(a)(a) For aboveground tank systems, a person certified in accordance with this chapter to install and repair aboveground storage tank systems — and for underground tank systems, a person certified in accordance with this chapter to install and repair underground storage tank systems.

ATCP 93.050(21)(b)(b) A registered professional engineer who directly supervises an installation by being present during the activities specified in s. ATCP 93.240 (16) and (17), and who is competent in the engineering methods and requirements in Wisconsin for designing and installing storage tank systems for flammable, combustible or hazardous liquids.

ATCP 93.050(22)(22) “Certified remover-cleaner” means a person certified in accordance with this chapter to remove storage tank systems and to remove accumulated sludge and remaining product from tanks that are to be closed, undergo a change in service, or otherwise be completely emptied and made inert.

ATCP 93.050(22m)(22m) “Certified tank system inspector” means a person certified in accordance with this chapter to inspect storage tank systems.

ATCP 93.050(23)(23) “Certified tank system liner” means a person certified in accordance with this chapter to install interior linings for storage tanks.

ATCP 93.050(24)(24) “Certified tank system site assessor” means a person certified in accordance with this chapter to conduct tank system site assessments and to collect samples necessary for those assessments.

ATCP 93.050(25)(25) “Certified tank system tightness tester” means a person certified in accordance with this chapter to perform precision tightness testing to determine the presence of leaks in storage tank systems.

ATCP 93.050(26)(26) “Change in service” means continued use of a storage tank system in another regulated status, or continued use of a tank that previously stored a regulated substance, to store a non-regulated substance; or continued use of a tank that previously stored a non-regulated substance, to store a regulated substance.

ATCP 93.050 NoteNote: An example of a “change in service” to another regulated status is an in-use tank that moves to temporarily out of service status. An example of “change in service” resulting from previously storing a regulated substance, to storing a non-regulated substance is a tank that is converted from storing heating oil to storing water.