18 Alaska Admin. Code § 53.030

Current through October 17, 2024

Section 18 AAC 53.030 - Sampling, testing, and oxygen content calculations

(a) To comply with the requirements of this chapter, the oxygen content of gasoline must be determined by

(1) taking a representative sample of the gasoline to be tested, using the sampling methods specified in 40 C.F.R. 80, Appendix D, as amended through July 1, 1996, hereby adopted by reference;

(2) testing the gasoline sampled to determine the mass concentration of each oxygenate, using the test method specified in ASTM D 4815-94a, as approved July 25, 1994, hereby adopted by reference; and

(3) using the following oxygen content calculations, with volume measurements adjusted to 60º Fahrenheit:

(A) for blends with only one oxygenate:

V oxygenate x d oxygenate x WW oxygen = _________ (V gas x d gas) + (V oxygenate x d oxygenate)

where:W= weight fraction (for percent, multiply by 100) oxygenate= oxygenate in the blend V= volume fraction d= specific gravity gas= gasoline

(B) for blends with more than one oxygenate:

W oxygen = UNHANDLEDCHAR (V oxygen x d oxygenate x W oxygen/oxygenate) _________ (V gas x d gas) + UNHANDLEDCHAR (V oxygenate x d oxygenate)

where:W= weight fraction (for percent, multiply by 100) oxygenate= oxygenate in the blend V= volume fraction d= specific gravity gas= gasoline

(b) The oxygen molecular weight contributions of an oxygenate approved for use under this chapter are set out in the following table:

OXYGEN MOLECULAR WEIGHT CONTRIBUTIONS

Oxygen Molecular

Weight Contribution Specific Gravity

at 60° Fahrenheit Methanol 0.49930.796 Ethanol 0.34730.794 Propanols 0.26620.789 Butanols 0.21580.810 Pentanols 0.18150.817 Methyl

Tertiary-Butyl

Ether (MTBE) 0.18150.744 Hexanols 0.15660.823 Ethyl Tertiary-Butyl

Ether (ETBE) 0.15690.755 Tertiary Amyl Methyl

Ether (TAME)0.15660.770

18 AAC 53.030

Eff. 9/25/92, Register 123; am 10/31/97, Register 144

The sampling and testing procedures referred to in this section may be reviewed at the department's Anchorage, Fairbanks, or Juneau offices. ASTM D 4815-94a may be ordered from the American Society for Testing and Materials, 100 Barr Harbor Drive, West Conshohocken, PA 19428 (610-832-9500).

Authority:AS 44.46.020

AS 46.03.010

AS 46.03.020

AS 46.14.020

AS 46.14.030

AS 46.14.510