Chapter ATCP 94

ATCP 94.120 ATCP 94.120 Definitions. In this chapter:

ATCP 94.120(1) (1) “Alternative liquid automotive fuel” includes all of the following:

ATCP 94.120(1)(a) (a) Mixtures containing more than 16.1 percent by volume of butanol or 15 percent by volume of methanol, denatured ethanol, other alcohols, or any combination thereof with gasoline or other fuels.

ATCP 94.120(1)(b) (b) Biodiesel over B5.

ATCP 94.120(1)(c) (c) Coal-derived liquid fuels.

ATCP 94.120(1)(d) (d) Other liquid automotive fuels not defined by this chapter.

ATCP 94.120(2) (2) “Automotive fuel rating” means:

ATCP 94.120(2)(a) (a) For gasoline, the octane rating.

ATCP 94.120(2)(b) (b) For an alternative liquid automotive fuel other than biodiesel, biomass-based diesel, biodiesel blends, biomass-based diesel blends, and ethanol flex fuels, the commonly used name of the fuel with a disclosure of the amount, expressed as the minimum percentage by volume, of the principal component of the fuel. A disclosure of other components, expressed as the minimum percentage by volume, may be included, if desired.

ATCP 94.120(2)(c) (c) For biomass-based diesel, biodiesel, biomass-based diesel blends with more than 5 percent biomass-based diesel, and biodiesel blends with more than 5 percent biodiesel, a disclosure of the biomass-based diesel or biodiesel component, expressed as the percentage by volume.

ATCP 94.120(2)(d) (d) For ethanol flex fuels, a disclosure of the ethanol component, expressed as the percentage by volume and the text “Use Only in Flex-Fuel Vehicles/May Harm Other Engines.”

ATCP 94.120(3) (3) “Automotive gasoline” means a type of gasoline suitable for use in spark ignition automobile engines and also commonly used in marine and non-automotive applications.

ATCP 94.120(4) (4) “Aviation gasoline” means a type of gasoline suitable for use as a fuel in an aviation spark- ignition internal combustion engine.

ATCP 94.120(5) (5) “Aviation turbine fuel” means a refined middle distillate suitable for use as a fuel in an aviation gas turbine internal combustion engine.

ATCP 94.120(6) (6) “Biodiesel blend” means a fuel comprised of biodiesel fuel with petroleum-based diesel fuel, designated BXX. In the abbreviation BXX, the XX represents the percent by volume of biodiesel fuel in the blend.

ATCP 94.120(7) (7) “Biodiesel fuel” means a fuel comprised of at least 99 percent by volume mono-alkyl esters of long chain fatty acids derived from vegetable oils or animal fats, designated B100 or B99.

ATCP 94.120(8) (8) “Biofuels” means any fuel that is derived from biomass.

ATCP 94.120(9) (9) “Biomass” means biological material including any material other than fossil fuels which is or was a living organism or component or product of a living organism.

ATCP 94.120(10) (10) “Butanol” means butyl alcohol, the chemical compound C4H9OH, a colorless substance existing in four isomeric forms.

ATCP 94.120(11) (11) “Department” means the Wisconsin department of agriculture, trade and consumer protection.

ATCP 94.120(12) (12) “Diesel fuel” means a refined hydrocarbon suitable for use as a fuel in a compression-ignition (diesel) internal combustion engine that may contain a combination of biodiesel, renewable diesel, and fuel additives.

ATCP 94.120(13) (13) “Dissimilar fuel products” means fuel products with different oxygenates, different oxygenate content by volume, different octane rating, different ASTM specifications, different biomass content by volume, or different definitions under this chapter.

ATCP 94.120(14) (14) “E15” means gasoline containing more than ten percent ethanol by volume but not more than fifteen percent ethanol by volume.

ATCP 94.120(15) (15) “E85” means high-level ethanol-gasoline blends containing 51 percent to 83 percent ethanol by volume, depending on geography and season.

ATCP 94.120(16) (16) “EPA” means the United States environmental protection agency.

ATCP 94.120(17) (17) “Ethanol” and “denatured fuel ethanol” means ethyl alcohol.

ATCP 94.120(18) (18) “Ethanol flex fuel” means blends of ethanol and hydrocarbons restricted for use as fuel in ground vehicles equipped with flexible-fuel spark-ignition engines.

ATCP 94.120(19) (19) “Finished fuels” means fuels that are ready to be used without requiring additional chemical or physical processing to meet adopted specifications.

ATCP 94.120(20) (20) “Fuel oil” means refined oil middle distillates, heavy distillates, or residues of refining, or blends of these, suitable for use as a fuel for heating or power generation.

ATCP 94.120(21) (21) “Gasoline” means a volatile mixture of liquid hydrocarbons generally containing small amounts of additives suitable for use as a fuel in a spark-ignition internal combustion engine.

ATCP 94.120(22) (22) “Gasoline-oxygenate blend” means a fuel consisting primarily of gasoline along with more than one percent by volume oxygenate, or more than 0.3 percent by volume methanol not to exceed the total oxygen content permitted by applicable laws and regulations.

ATCP 94.120(23) (23) “Inspection” means collection of product samples, qualitative determination by visual assessment and laboratory testing, and verification of associated product-shipping and storage records.

ATCP 94.120(24) (24) “Inspector” means a duly authorized fuel products inspector of the department.

ATCP 94.120(25) (25) “Kerosene” and “kerosine” means a refined middle distillate suitable for use as a fuel for heating or illuminating.

ATCP 94.120(26) (26) “Lead substitute” means an EPA-registered gasoline additive suitable, when added in small amounts to fuel, to reduce or prevent exhaust valve recession or seat wear in automotive spark-ignition internal combustion engines designed to operate on leaded fuel.

ATCP 94.120(27) (27) “Methanol” means methyl alcohol.

ATCP 94.120(28) (28) “Motor fuel” means a flammable or combustible liquid which is used in the operation of an internal combustion or turbine engine and which is regulated by either the product specifications in subch. II or the labeling requirements in s. ATCP 94.300.

ATCP 94.120(29) (29) “MTBE” means methyl tertiary-butyl ether.

ATCP 94.120(30) (30) “Oxygenate” means an oxygen-containing, ashless, organic compound, such as an alcohol or ether, which can be used as a fuel or fuel supplement.

ATCP 94.120(31) (31) “Petroleum and other liquid fuel products,” “liquid fuels,” and “fuel products” means gasoline, gasoline/alcohol-ether gasoline-oxygenate blends, aviation gasoline, aviation turbine fuel, automotive gasoline, kerosene, fuel oil, burner fuel, diesel fuel, biofuels, other liquid motor fuels, and blends of petroleum-based fuels and biofuels.

ATCP 94.120(32) (32) “Racing gasoline” means a specialty fuel typically used in non-road racing vehicles that is generally of lower volatility, has a narrower boiling range and a higher octane rating than gasolines made for use in conventional passenger vehicles.

ATCP 94.120(33) (33) “Reclaimed used lubricating oil,” “recleaned used lubricating oil,” or “reconditioned used lubricating oil” means used oil which has been cleaned by cleaning methods used for the primary purpose of removing insoluble contaminants to make the oil suitable for further use. In this subsection, “cleaning method” includes settling, heating, dehydration, filtration, or centrifuging.

ATCP 94.120(34) (34) “Red-tag” means a red tag secured to a component of a storage or dispensing system, which gives notice that the system or the product stored is under enforcement action for failure to comply with the requirements of either this chapter or ch. ATCP 93, and which prohibits operation of the system until the red tag is removed by or under the direction of an inspector.

ATCP 94.120(35) (35) “Rerefined used lubricating oil” means used oil on which refining processes have been used to produce high-quality base stock for lubricants. In this subsection, “refining process” includes distillation, hydrotreating, or treatments employing acid, caustic, solvent, clay, or other chemicals, or a combination of those processes.

ATCP 94.120 History History: Cr. Register, July, 1980, No. 295, eff. 8-1-80; cr. (6) and (7), Register, February, 1986, No. 362, eff. 3-1-86; CR 03-011: r. and recr. Register December 2003 No. 576, eff. 1-1-04; CR 05-081: renum. from Comm 48.03, renum. (1) (d), (e) and (3) to (7) to be (1) (c), (d), (5), (7), (9), (10), (12) and am., am. (1) (a), r. (1) (c), cr. (3), (4), (6), (8) and (11) Register August 2006 No. 608, eff. 9-1-06; CR 10-006: renum. from Comm 48.300 and am. (1) (intro.), (7) to (9) Register December 2010 No. 660, eff. 1-1-11; correction to numbering made under s. 13.92 (4) (b) 1., Stats., Register December 2010 No. 660; correction in (5), (8), (11) made under s. 13.92 (4) (b) 6., 7., Stats., Register December 2011 No. 672; corrections in (5), (8), (11) made under s. 13.92 (4) (b) 6., 7., Stats., October 2013 No. 694; CR 21-096: r. and recr. Register February 2024 No. 818, eff. 3-1-24.

subch. II of ch. ATCP 94 Subchapter II — Petroleum and Other Liquid Fuel Product Specifications

ATCP 94.200 ATCP 94.200 Adoption of standard specifications by reference.

ATCP 94.200(1) (1) The following standards of the 2023 Annual Book of ASTM Standards of ASTM International are incorporated by reference into this chapter:

ATCP 94.200(1)(a) (a) ASTM D396-21, standard specification for fuel oils.

ATCP 94.200(1)(b) (b) ASTM D910-21, standard specification for aviation gasolines.

ATCP 94.200(1)(c) (c) ASTM D975-22, standard specification for diesel fuel oils.

ATCP 94.200(1)(d) (d) ASTM D1655-22, standard specification for aviation turbine fuels.

ATCP 94.200(1)(e) (e) ASTM D3699-19, standard specification for kerosine.

ATCP 94.200(1)(f) (f) ASTM D4806-21a, standard specification for denatured fuel ethanol for blending with gasolines for use as automotive spark-ignition engine fuel.

ATCP 94.200(1)(g) (g) ASTM D4814-21c, standard specification for automotive spark-ignition engine fuel.

ATCP 94.200(1)(h) (h) ASTM D5798-21 standard specification for ethanol fuel blends for flexible-fuel for automotive spark-ignition engines.

ATCP 94.200(1)(i) (i) ASTM D6227-18, standard specification for unleaded aviation gasoline containing a non-hydrocarbon component.

ATCP 94.200(1)(j) (j) ASTM D6751-20a, standard specification for biodiesel fuel blend stock (B100) for middle distillate fuels.

ATCP 94.200(1)(k) (k) ASTM D7467-20a, standard specification for diesel fuel oil, biodiesel blend (B6 to B20).

ATCP 94.200(1)(L) (L) ASTM D7547-21, standard specification for hydrocarbon unleaded aviation gasoline.

ATCP 94.200(1m) (1m) All finished fuels must meet the adopted standard specifications at the time they are offered for sale.

ATCP 94.200(1m)(a) (a) Fuels sold from terminals, bulk plants, or other wholesale operations shall meet the required specification for the fuel type indicated on the delivery records required in s. ATCP 94.340.

ATCP 94.200(1m)(b) (b) Fuels sold at retail shall meet the required specification for the fuel type indicated by the dispenser labeling required in s. ATCP 94.300 (1).

ATCP 94.200(2) (2) Where no ASTM standard exists, other generally recognized national consensus standards may be used.

ATCP 94.200 Note Note: Copies of the adopted standards are on file in the offices of the department and the legislative reference bureau. Copies of the ASTM standards may be purchased from ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshokocken, PA 19428–2959, telephone [phone], e-mail [e-mail], or website www.astm.org.

ATCP 94.200 Note Note: Pursuant to section 168.07 (2) of the Statutes, inspections to determine compliance with specifications prescribed by the department must be conducted in accordance with the latest ASTM methods.

ATCP 94.200 History History: CR 03-011: cr. Register December 2003 No. 576, eff. 1-1-04; CR 05-081: r. and recr. Register August 2006 No. 608, eff. 9-1-06; CR 10-006: renum. from Comm 48.400 and am. (title), (1) (a) to (f), (h), (j), cr. (1) (k), (L) Register December 2010 No. 660, eff. 1-1-11; CR 14-047: am. (1) Register May 2015 No. 713, eff. 6-1-15; CR 16-012: am. (1) (intro.), (a) to (h), (j) to (L) Register August 2016 No. 728, eff. 9-1-16; CR 18-019: am. (1) (intro.), (a) to (d), (f) to (L) Register January 2020 No. 769, eff. 2-1-20; CR 21-096: am. (1), cr. (1m) Register February 2024 No. 818, eff. 3-1-24.

ATCP 94.210 ATCP 94.210 Gasoline specifications.

ATCP 94.210(1) (1) Gasoline, automotive gasoline, and gasoline containing up to 10 percent oxygenate by volume.

ATCP 94.210(1)(c) (c) Automotive gasoline. Any fuel product designated by name or reference as automotive gasoline shall meet the requirements specified in ASTM D4814.

ATCP 94.210(1)(d) (d) Gasoline containing up to 10 percent oxygenate by volume. Other oxygenated fuels shall be acceptable if the oxygenates are blended in a manner approved by the department in amounts allowed by the EPA and the final product conforms to the standard specification for gasoline under par. (c).

ATCP 94.210(3) (3) Reid vapor pressure for gasoline-ethanol blends containing up to 10 percent oxygenate by volume. The blend shall meet ASTM D4814, “Standard Specification for Automotive Spark-Ignition Engine Fuel,” except that the maximum vapor pressure shall not exceed the ASTM D4814 limits by more than 1.0 psi for blends containing one or more percent by volume ethanol for volatility classes A, B, C, D, and E from September 16 through May 31.

ATCP 94.210 History History: R. and recreate from Ind 10.03, Register, July, 1980, No. 295, eff. 8-1-80; Table 10.04-B1 reprinted to correct error, Register, September, 1980, No. 297; r. and recr. (1) (c) and Table 48.04-B1, cr. (1) (d), Register, February, 1986, No. 362, eff. 3-1-86; CR 03-011: am. (1) (b) and (2), r. Tables 48.04-B1, B2, and C, cr. (1) (e), Register December 2003 No. 576, eff. 1-1-04; CR 05-081: renum. from Comm 48.04, renum. (1) (intro.) to (e) to be (1) (a) to (d), (f) and (g) and am., Table 48.04-A to be Table 48.500, am. (1) (title) and (2), cr. (1) (a) (title) and (e) Register August 2006 No. 608, eff. 9-1-06; CR 10-006: renum. from Comm 48.500 and am. (1) (b), (c) 1., (d) 1., 4., (2) Register December 2010 No. 660, eff. 1-1-11; correction in (1) (b) made under s. 13.92 (4) (b) 7., Stats., Register December 2011 No. 672; correction in (1) (b) made under s. 13.92 (4) (b) 7., Stats., Register October 2013 No. 694; CR 21-096: r. and recr. Register February 2024 No. 818, eff. 3-1-24.

ATCP 94.215 ATCP 94.215 E15 specifications.

ATCP 94.215(1) (1) Requirements. Any fuel product designated by name or reference or defined as “E15” shall meet the requirements specified in ASTM D4814. Any person who distributes E15 shall state on any invoice, bill of lading, shipping paper, or other documentation accompanying the shipment used in normal and customary business practices, the maximum percent by volume of ethanol.

ATCP 94.215(2) (2) Reid vapor pressure for E15. The blend shall meet ASTM D4814, “Standard Specification for Automotive Spark-Ignition Engine Fuel,” except that the maximum vapor pressure shall not exceed the ASTM D4814 limits by more than 1.0 psi for blends containing one or more percent by volume ethanol for volatility classes A, B, C, D, and E from September 16 through May 31.

ATCP 94.215 History History: CR 21-096: cr. Register February 2024 No. 818, eff. 3-1-24.

ATCP 94.220 ATCP 94.220 Kerosene specifications. Any fuel product designated by name or reference as “kerosene” or “kerosine” shall meet the requirements specified in ASTM D3699.

ATCP 94.220 History History: R. and recr. from Ind 10.03, Register, July, 1980, No. 295, eff. 8-1-80; am. table, Register, May, 1984, No. 341, eff. 6-1-84; r. and recr. table, Register, February, 1986, No. 362, eff. 3-1-86; CR 03-011: am., r. Table 48.05 Register December 2003 No. 576, eff. 1-1-04; CR 05-081: renum. from Comm 48.05 Register August 2006 No. 608, eff. 9-1-06; CR 10-006: renum. from Comm 48.510 and am. Register December 2010 No. 660, eff. 1-1-11.

ATCP 94.230 ATCP 94.230 Fuel oil specifications. Any petroleum product designated by name or reference as No. 1 fuel oil to No. 6 fuel oil shall meet the requirements specified in ASTM D396.

ATCP 94.230 History History: R. and recr. from Ind 10.01 and 10.02, Register, July, 1980, No. 295, eff. 8-1-80; am. table, Register, May, 1984, No. 341, eff. 6-1-84; r. and recr. table, Register, February, 1986, No. 362, eff. 3-1-86; CR 03-011: am., r. Table 48.06 Register December 2003 No. 576, eff. 1-1-04; CR 05-081: renum. from Comm 48.06 Register August 2006 No. 608, eff. 9-1-06; CR 10-006: renum. from Comm 48.520 and am. Register December 2010 No. 660, eff. 1-1-11.

ATCP 94.240 ATCP 94.240 Diesel fuel specifications.

ATCP 94.240(1) (1) Any fuel product designated by name or reference as No. 1 diesel fuel to No. 4 diesel fuel shall meet the requirements specified in ASTM D975.

ATCP 94.240(3) (3) Biodiesel fuel meeting the requirements specified in ASTM D6751 may be added to diesel fuel meeting the requirements specified in ASTM D975.

ATCP 94.240(4) (4) 

ATCP 94.240(4)(a) (a) Biodiesel blends of greater than 5 but not more than 20 percent biodiesel by volume shall meet the requirements of ASTM D7467.

ATCP 94.240(4)(b) (b) The retailer shall be provided, at the time of delivery of the fuel, a declaration of the percent by volume biodiesel on an invoice, bill of lading, shipping paper, or other document. This documentation is for dispenser labeling purposes only; it is the responsibility of any potential blender to determine the amount of biodiesel in the diesel fuel prior to blending.

ATCP 94.240(5) (5) Any person who distributes petroleum-source diesel fuel mixed with non-petroleum-source diesel fuel shall accurately state on any invoice, bill of lading, shipping paper, or other documentation accompanying the shipment used in normal and customary business practices, the type and maximum volume percent of each component.

ATCP 94.240 History History: Cr. Register, July, 1980, No. 295, eff. 8-1-80; r. and recr. table, Register, February, 1986, No. 362, eff. 3-1-86; CR 03-011: am., r. Table 48.06, cr. (2) to (4) Register December 2003 No. 576, eff. 1-1-04; CR 05-081: renum. from Comm 48.07, am. (1) and (3), cr. (5) Register August 2006 No. 608, eff. 9-1-06; CR 10-006: renum. from Comm 48.530 and am. (1), cr. (4) Register December 2010 No. 660, eff. 1-1-11; correction in (1) made under s. 13.92 (4) (b) 7., Stats., Register December 2010 No. 660; CR 21-096: am. (title), (1), r. (2), renum. (4) to (4) (a) and am., cr. (4) (b), am. (5), r. (6) Register February 2024 No. 818, eff. 3-1-24.