Ariz. Admin. Code § 3-7-708

Current through Register Vol. 30, No. 50, December 13, 2024

Section R3-7-708 - Gasoline Oxygenate Blends

A. A person that has custody of gasoline blended with an oxygenate shall ensure that the amount of oxygenate does not exceed the amount allowed by EPA waivers, Section 211(f) of the Clean Air Act, and meets the requirements of A.R.S. §§ 3-3491, 3-3492, and 3-3495.

B. Fuel ethanol specifications. A person that uses fuel ethanol as a blending component with conventional gasoline, conventional gasoline blendstocks, ethanol flex fuel, AZRBOB, or Arizona CBG shall ensure that the fuel ethanol meets the following requirements:

1. A sulfur content not exceeding 10 ppm by weight;

2. The fuel ethanol must be composed solely of carbon, hydrogen, nitrogen, oxygen, and sulfur;

3. Only gasoline previously certified under 40 CFR Part 1090 , Subpart C, (including previously certified blendstocks for oxygenate blending), gasoline blendstocks, natural gas liquids, or certified ethanol denaturant that meets the requirements in 40 CFR § 1090.275 may be used as denaturants; and

4. The concentration of all denaturants is limited to a maximum of 3.0 volume percent.

C. For oxygenates other than ethanol, the oxygenate shall meet the applicable ASTM standard for the oxygenate, and the finished blend shall meet ASTM D4814.

D. Special provisions for gasoline-ethanol blends.

1. Gasoline-ethanol blends shall meet ASTM D4814, except as provided in subsection (D)(2) or (D)(3).

2. The maximum vapor pressure for gasoline blended with fuel ethanol may exceed the vapor pressure requirements outlined in ASTM D4814 by no more than 1.0 psi (referred to as the 1.0 psi waiver) for the following gasoline-ethanol blends:

a. Outside of the CBG-covered area if the concentration of ethanol, excluding the required denaturing agent, is at least 9% by volume and no more than the maximum concentration of ethanol that is allowed for the 1.0 psi waiver to apply under federal law;

b. In area B from October 1 through March 31 if the concentration of ethanol, excluding the required denaturing agent, is at least 6% by volume and no more than 15% by volume.

c. Inside the CBG-covered area during April only.

3. Gasoline blended with no more than 15% by volume of ethanol shall be blended using one of the following alternatives:

a. The base gasoline complies with the standards in ASTM D4814, the fuel ethanol complies with the standards in ASTM D4806, and the finished blend complies with the standards in ASTM D4814 with the following permissible exceptions:

i. The distillation minimum temperature at the 50 volume percent evaporated point is not less than 66°C (150°F), and

ii. The minimum test temperature at which the vapor/liquid ratio is equal to 20 is waived; or

b. The finished blend complies with the standards in ASTM D4814.

E. Ethanol flex fuel sold or offered for sale within the CBG-covered area shall:

1. Use fuel ethanol that meets the standards in this Chapter, and

2. Have a maximum vapor pressure that does not exceed the maximum vapor pressure requirements in R3-7-751(A)(6).

F. E15 sold or offered for sale within the CBG-covered area shall:

1. Use fuel ethanol that meets the standards in this Chapter, and

2. Be blended with ethanol flex fuel that meets the requirements of subsection (E), or

3. Be blended with Arizona CBG or AZRBOB.

Ariz. Admin. Code § R3-7-708

Adopted by final rulemaking at 23 A.A.R. 2280, effective 10/2/2017. Amended by final rulemaking at 24 A.A.R. 2666, effective 11/10/2018. Amended by final rulemaking at 29 A.A.R. 441, effective 3/5/2023.