Section R20-2-708. Gasoline Ethanol Blends

A.      A person that has custody of gasoline blended with an oxygen- ate 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 A.R.S. § 41-2122. The maximum oxygen content of gasoline oxygenate blends shall not exceed 4.0 per- cent by weight for fuel ethanol oxygenate and as specified in

A.R.S. § 41-2122 for other oxygenates.

B.       Special provisions for gasoline ethanol blends.

1.        A gasoline ethanol blend that meets the requirements in subsections (B)(1)(a) and (b) shall not exceed the vapor pressure specified in ASTM D4814 by more than 1 psi:

a.         The gasoline ethanol blend shall contain fuel etha- nol. The concentration of the fuel ethanol, excluding the required denaturing agent, shall be:

i.         From May 1 through September 15, at least nine percent and no more than 10 percent by volume of the gasoline ethanol blend; and

ii.        From September 16 through April 30, at least

1.5 percent by weight and no more than 10 per- cent by volume of the gasoline ethanol blend; and

b.        The fuel ethanol content of the gasoline ethanol blend shall:

i.         Be determined using the appropriate test method listed in ASTM D4814, and

ii.        Not exceed any applicable waiver condition under Section 211(f) of the Clean Air Act.

2.        The provision in subsection (B)(1) is effective for gaso- line ethanol blends sold:

a.         Outside the CBG-covered area year around, and

b.        Within the CBG-covered area during April.

3.        Gasoline blended with no more than 10 percent by vol- ume of fuel ethanol shall be blended using one of the fol- lowing 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;

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

c.         The base gasoline complies with the standards in ASTM D4814 except distillation 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 ration is equal to 20 is waived.

4.        A gasoline ethanol blend shall meet the standards speci- fied in ASTM D4814.

C.      In addition to complying with the requirements in R20-2-707, the transferor of a gasoline ethanol blend shall ensure that the product transfer document contains a legible and conspicuous statement that the gasoline being transferred contains fuel eth- anol and the percentage concentration of fuel ethanol.

Historical Note

Former Section R4-31-204(F) renumbered without change as Section R4-31-708 (Supp. 89-1). Amended effective October 12, 1990 (Supp. 90-4). R20-2-708 recodified from R4-31-708 (Supp. 95-1). Former Section R20-2-708 repealed; new Section R20-2-708 renumbered from R20-2-710 and amended by final rulemaking at 5

A.A.R. 4312, effective October 18, 1999 (Supp. 99-4). Amended by final rulemaking at 12 A.A.R. 3722, effec- tive September 12, 2006 (Supp. 06-3). Amended by final rulemaking at 17 A.A.R. 190, effective March 12, 2011 (Supp. 11-1). Amended by final rulemaking at 19 A.A.R.

3325, effective November 30, 2013 (Supp. 13-4).