(a) Sulfur. Sulfur content of gasoline and butane must be determined by use of the following methods:

(1)

(i) Through December 31, 2015, the sulfur content of gasoline must be determined by ASTM D2622.

(ii) Beginning January 1, 2016, the sulfur content of gasoline must be determined by a test method approved under §80.47.

(2)

(i) Through December 31, 2015, the sulfur content of butane must be determined by ASTM D6667.

(ii) Beginning January 1, 2016, the sulfur content of butane must be determined by a test method approved under §80.47.

(b) Olefins. Olefin content must be determined by use of the following methods:

(1) Through December 31, 2015, olefin content must be determined using ASTM D1319.

(2) Beginning January 1, 2016, olefin content must be determined by a test method approved under §80.47.

(c) Reid Vapor Pressure (RVP).

(1) Through December 31, 2015, Reid Vapor Pressure must be determined using ASTM D5191, except the following correction equation must be used:

RVP psi = (0.956 * X) − 0.347

RVP kPa = (0.956 * X) − 2.39

(2) Beginning January 1, 2016, RVP must be determined by a test method approved under §80.47, except as provided in paragraph (c)(2)(i) of this section.

(i) For reporting purposes, the RVP test result computed from §80.47 must continue to utilize the RVP correction equation in paragraph (c)(1) of this section.

(ii) [Reserved]

(d) Distillation. Distillation parameters must be determined by use of the following test methods:

(1) Through December 31, 2015, distillation parameters must be determined using ASTM D86.

(2) Beginning January 1, 2016, distillation parameters must be determined by a test method approved under §80.47. (Note: The precision estimates for reproducibility in ASTM D86-12 do not apply; see §80.47(h).)

(e) Benzene. Benzene content must be determined by use of the following test methods:

(1) Through December 31, 2015, benzene content must be determined using ASTM D3606, except that instrument parameters shall be adjusted to ensure complete resolution of the benzene, ethanol, and methanol peaks because ethanol and methanol may cause interference with ASTM D3606 when present.

(2) Beginning January 1, 2016, benzene content must be determined by a test method approved under §80.47.

(f) Aromatic content. Aromatic content must be determined by use of the following methods:

(1) Through December 31, 2015, aromatic content must be determined using ASTM D5769, except the sample chilling requirements in section 8 of this standard method are optional.

(2) Beginning January 1, 2016, aromatic content must be determined by a test method approved under §80.47.

(g) Oxygen and oxygenate content analysis. Oxygen and oxygenate content must be determined by use of the following methods:

(1) Through December 31, 2015, oxygen and oxygenate content must be determined using ASTM D5599.

(2) Beginning January 1, 2016, oxygen and oxygenate content must be determined by a test method approved under §80.47.

(h) Materials incorporated by reference. The published materials identified in this section are incorporated by reference into this section with the approval of the Director of the Federal Register under 5 U.S.C. 552(a) and 1 CFR part 51. To enforce any edition other than that specified in this section, a document must be published in the Federal Register and the material must be available to the public. All approved materials are available for inspection at the Air and Radiation Docket and Information Center (Air Docket) in the EPA Docket Center (EPA/DC) at Rm. 3334, EPA West Bldg., 1301 Constitution Ave. NW., Washington, DC. The EPA/DC Public Reading Room hours of operation are 8:30 a.m. to 4:30 p.m., Monday through Friday, excluding legal holidays. The telephone number of the EPA/DC Public Reading Room is (202) 566-1744, and the telephone number for the Air Docket is (202) 566-1742. These approved materials are also available for inspection at the National Archives and Records Administration (NARA). For information on the availability of this material at NARA, call (202) 741-6030 or go to http://www.archives.gov/federal__register/code__of__federal__regulations/ibr__locations.html. In addition, these materials are available from the sources listed below.

(1) ASTM International material. The following standards are available from ASTM International, 100 Barr Harbor Dr., P.O. Box C700, West Conshohocken, PA 19428-2959, (877) 909-ASTM, or http://www.astm.org:

(i) ASTM D86-12, Standard Test Method for Distillation of Petroleum Products at Atmospheric Pressure, approved December 1, 2012 (“ASTM D86”).

(ii) ASTM D1319-13, Standard Test Method for Hydrocarbon Types in Liquid Petroleum Products by Fluorescent Indicator Adsorption, approved May 1, 2013 (“ASTM D1319”).

(iii) ASTM D2622-10, Standard Test Method for Sulfur in Petroleum Products by Wavelength Dispersive X-ray Fluorescence Spectrometry, approved February 15, 2010 (“ASTM D2622”).

(iv)-(v) [Reserved]

(vi) ASTM D3606-10, Standard Test Method for Determination of Benzene and Toluene in Finished Motor and Aviation Gasoline by Gas Chromatography, approved October 1, 2010 (“ASTM D3606”).

(vii)-(viii) [Reserved]

(ix) ASTM D5191-13, Standard Test Method for Vapor Pressure of Petroleum Products (Mini Method), approved December 1, 2013 (“ASTM D5191”).

(x) [Reserved]

(xi) ASTM D5599-00 (Reapproved 2010), Standard Test Method for Determination of Oxygenates in Gasoline by Gas Chromatography and Oxygen Selective Flame Ionization Detection, approved October 1, 2010 (“ASTM D5599”).

(xii) ASTM D5769-10, Standard Test Method for Determination of Benzene, Toluene, and Total Aromatics in Finished Gasolines by Gas Chromatography/Mass Spectrometry, approved May 1, 2010 (“ASTM D5769”).

(xiii) [Reserved]

(xiv) ASTM D6667-10, Standard Test Method for Determination of Total Volatile Sulfur in Gaseous Hydrocarbons and Liquefied Petroleum Gases by Ultraviolet Fluorescence, approved October 1, 2010 (“ASTM D6667”).

(xv)-(xvi) [Reserved]

(2) [Reserved]

[59 FR 7813, Feb. 16, 1994, as amended at 59 FR 36961, July 20, 1994; 61 FR 58306, Nov. 13, 1996; 63 FR 63793, Nov. 17, 1998; 65 FR 6822, Feb. 10, 2000; 65 FR 53189, Sept. 1, 2000; 66 FR 17263, Mar. 29, 2001; 67 FR 8737, Feb. 26, 2002; 67 FR 40181, June 12, 2002; 68 FR 56781, Oct. 2, 2003; 68 FR 57819, Oct. 7, 2003; 71 FR 16499, Apr. 3, 2006; 73 FR 74355, Dec. 8, 2008; 74 FR 6233, Feb. 6, 2009; 76 FR 65385, Oct. 21, 2011; 79 FR 23632, Apr. 28, 2014; 80 FR 9090, Feb. 19, 2015; 85 FR 7070, Feb. 6, 2020]