Statutes, codes, and regulations
Virginia Administrative Code
Title 2 - AGRICULTUREAgency 5 - DEPARTMENT OF AGRICULTURE AND CONSUMER SERVICES
Chapter 480 - REGULATION GOVERNING THE OXYGENATION OF GASOLINE
Section 2VAC5-480-70 - Sampling, testing, and oxygen content calculations

2 Va. Admin. Code § 5-480-70

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Current through Register Vol. 41, No. 8, December 2, 2024
Section 2VAC5-480-70 - Sampling, testing, and oxygen content calculations
A. Sampling methodologies used by the commissioner to determine compliance with this chapter shall be those set forth in Appendix D, 40 CFR Part 80, which is hereby adopted by reference.
B. Determination by the commissioner of the oxygenate and its weight and volume in gasoline shall be in accordance with test method ASTM D 4815-89 as set forth in ASTM specification D 4814 or other methods developed or approved by the United States Environmental Protection Agency.
C. Oxygen content shall be calculated by the commissioner by multiplying the mass concentration of each oxygenate in gasoline by the oxygen molecular weight contribution of the oxygenate. All volume measurements shall be adjusted to 60 degrees Fahrenheit. For the purpose of calculating oxygen content, the following oxygen molecular weight contributions shall be used:

Oxygenate Oxygen Mass Fraction Relative Density 60/60°F
Methyl Alcohol 0.4993 0.7963
Ethyl Alcohol 0.3473 0.7939
n-Propyl Alcohol 0.2662 0.8080
Isopropyl Alcohol 0.2662 0.7899
n-Butyl Alcohol 0.2158 0.8137
Isobutyl Alcohol 0.2158 0.8058
sec-Butyl Alcohol 0.2158 0.8114
tertiary-Butyl Alcohol 0.2158 0.7922*
Methyl Tertiary-Butyl Ether 0.1815 0.7460
Ethyl tertiary-Butyl Ether 0.1566 0.7452
tertiary-Amyl Methyl Ether 0.1566 0.7752
tertiary-Hexyl Methyl Ether 0.1377 0.7860
Dilso propyl ether 0.1566 0.1566 0.7300
*Extrapolated, below freezing temperature.

D. Oxygenated gasoline shall consist of a single homogenous mixture, presenting no indication of phase separation when tested by the commissioner in accordance with the test method described in Annex A3 of ASTM Specification D-4814.
1. -8°C (17°F) during the month of January.
2. -7°C (19°F) during the month of February.
3. -3°C (26°F) during the month of March.
4. 3°C (37°F) during the month of April.
5. 9°C (48°F) during the month of May.
6. 10°C (50°F) during the months of June, July, August, and September.
7. 4°C (39°F) during the month of October.
8. -2°C (28°F) during the month of November.
9. -7°C (19°F) during the month of December.

2 Va. Admin. Code § 5-480-70

Derived from VR115-04-28 § 7, eff. November 1, 1993.

Statutory Authority

§§ 59.1-153 and 59.1-156 of the Code of Virginia.