California Code of Regulations › Title 13 - Motor Vehicles › Division 3 - Air Resources Board › Chapter 5 - Standards for Motor Vehicle Fuels › Article 1 - Standards for Gasoline › Subarticle 2 - Standards for Gasoline Sold Beginning March 1, 1996 › Section 2263 - Sampling Procedures and Test Methods

Current through Register 2024 Notice Reg. No. 28, July 12, 2024
(a)
Sampling Procedures
. In
					 determining compliance with the standards set forth in this subarticle 2, an
					 applicable sampling methodology set forth in 13 C.C.R. section
					 2296 shall be used.
(b)
Test Methods
.
(1) In determining compliance with the
					 gasoline standards set forth in this subarticle 2, including those in the
					 sections identified in Table 1, the test methods presented in Table 1 shall be
					 used. All identified test methods are incorporated herein by reference.
Table 1
Section
Gasoline
								Specification
Test
								Methoda
2262
Reid Vapor Pressure
ASTM D
								323-58b or 13 C.C.R. Section
								2297
2262
Sulfur Content
ASTM D 2622-94
								(1994)c, d or ASTM D 5453-93 (1993) (Prior to
								February 16, 2014)
ASTM D 5453-93 (1993) (Starting
								February 16, 2014)
2262
Benzene Content
ASTM D 5580-00
								(2000)e (Prior to February 16, 2014)
ASTM D 5580-02 (2007) (Starting
								February 16, 2014)
2262
Olefin Content
ASTM D 1319-95a
								(1995)f (Through December 31, 2001)
ASTM D 6550-00
								(2000)g,h,i (Starting January 1, 2002 and prior to
								February 16, 2014)
ASTM D 6550-10
								(2010)k,
l
,m (Starting February 16,
								2014)
2262
Oxygen Content
ASTM D 4815-04
								(2004) (Prior to February 16, 2014)
ASTM D 4815-09 (2009) (Starting
								February 16, 2014)
2262
T90 and T50
ASTM D
								86-99a
2262
Aromatic Hydrocarbon
								Content
ASTM D 5580-00 (2000)j (Prior to
								February 16, 2014)
ASTM D 5580-02 (2007) (Starting
								February 16, 2014)
2262.5(b)
Ethanol Content
ASTM D
								4815-04 (2004) (Prior to February 16, 2014)
ASTM D 4815-09 (2009) (Starting
								February 16, 2014)
2262.6
MTBE Content
ASTM D 4815-04
								(2004) (Prior to February 16, 2014)
ASTM D 7754-11 (2011) (Starting
								February 16, 2014)
2262.6(c)
Oxygen from oxygenates identified
								in section
								2262.6(c)
								(4
ASTM D 4815-04 (2004) (Prior to February 16, 2014)
ASTM D 7754-11 (2011) (Starting
								February 16, 2014)
__________
a Do not report values below
						the limit of detection (LOD) specified in the test method. Where a test method
						does not specify a LOD, do not report values below the lower limit of the scope
						of the test method.
b Delete paragraph 4(b)
						concerning sampling.
c Make the following
						modifications to paragraph 9.1:
Low Level Sulfur Calibration Procedure
Reagents
Thiophene, at least 99% purity
2-Methylthiophene, at least 98% purity
Toluene, reagent grade
2,2,4-Trimethylpentane, reagent grade
Preparation of Stock Standard
Weigh standard materials thiophene (~0.7290 gm) and
						2-methylthiophene (~0.7031 gm) separately into a tared volumetric flask and
						record the individual mass to 0.1 mg. Add "mixed solvent" containing 25%
						toluene and 75% iso-octane (by volume) into the flask to a net weight of
						approximately 50 gm and record the weight. This "Stock Standard" contains
						approximately 10 mg/gm sulfur. The actual sulfer concentration can be
						calculated as follows:
Sulfur from thiophene (gm)=
Weight of thiophene *32.06* purity/84.14
Sulfur from 2-methylthiophene (gm)=
Weight of 2-methylthiophene *32.06* purity/98.17
Sulfur concentration of Stock Standard (gm/gm)=(sulfur
						from thiophene + sulfur from 2-methylthiophene)/net weight of the stock
						standard
Multiply the sulfur concentration by 1000 to convert the
						unit to mg/gm.
Preparation of Calibration Standards
Pipet 2.5 ml of the Stock Standard to 250 ml flask and
						dilute with the "mixed solvent" to the mark. The "Diluted Standard" contains
						approximately 100 mg/kg sulfur. Prepare 5, 10, 20, 30, 50, 75 ppm calibration
						standards by pipetting 5, 10, 20, 30, 50, 75 ml of the Diluted Standard into a
						100 ml flask, respectively, and diluting with the "mixed solvent" to the mark.
						The actual concentration of the calibration standard should be determined from
						the stock standard. The standards with concentration ranging from 5 to 100 ppm
						and the "mixed solvent" are to be used for calibrating the instrument.
d Replace ASTM D 2622-94
						reproducibility values with the following:
Sulfur Content, ppm
Reproducibility
10 to 30
40.5% X Sulfur Content (ppm)
>30
19.2% X Sulfur Content (ppm)
e The reproducibility of
						benzene is as follows:
Reproducibility=0.1409
						(x1.133), where X=vol %
f Add the following
						reproducibility statement for oxygenate-containing samples:
Range
Reproducibility
Olefins
0.3 - 33
0.819(X)0.6
X=Volume %
g Replace ASTM D6550-00
						reproducibility equation with the following:
Reproducibility=0.32
						X0.5
where X is between 0.3 and 25 mass % olefin
h The conversion from mass %
						olefin to volume % olefin is defined as follows:
volume % olefin=0.857 * mass % olefin
i Replace the last sentence in
						ASTM D6550-00 section
						1.1 with the following:
The application range is from 0.3 to 25 mass % total
						olefins.
j The reproducibility of total
						aromatic hydrocarbon is as follows:
Reproducibility=1.4 volume%
k Replace ASTM D6550-10
						reproducibility equation with the following:
Reproducibility=0.32
						X0.5
where X is between 0.3 and 25 mass % olefin
l
The
						conversion from mass % olefin to volume % olefin is defined as follows:
volume % olefin=0.857 * mass % olefin
m Replace the last sentence in
						ASTM D6550-10 section
						1.1 with the following:
The application range is from 0.3 to 25 mass % total
						olefins.