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Federal Register / Vol. 86, No. 122 / Tuesday, June 29, 2021 / Rules and Regulations testing must have octane values that represent commercially available fuels
34573

for the appropriate application. Test fuel specifications apply as follows:

TABLE 2 OF 1065.710TEST FUEL SPECIFICATIONS FOR NEAT E0 GASOLINE
Specification Property
Unit
General testing
Low-temperature testing
Distillation Range:
Evaporated initial boiling point
10% evaporated
50% evaporated
90% evaporated
Evaporated final boiling point
Total Aromatic Hydrocarbons
Olefins c
Lead
Phosphorous
Total sulfur
Dry vapor pressure equivalent d

C
C
C
C
C
volume %
volume %
g/liter
g/liter
mg/kg
kPa

2435 b
4957
93110
149163
Maximum, 213
Maximum, 35
Maximum, 10
Maximum, 0.013
Maximum, 0.0013 ..
Maximum, 80
60.063.4 b e

2436
3748.
82101.
158174.
Maximum, 212.
Maximum, 30.4
Maximum, 17.5
Maximum, 0.013
Maximum, 0.005
Maximum, 80
77.281.4

Reference procedure a
ASTM D86.

ASTM
ASTM
ASTM
ASTM
ASTM
ASTM

D1319 or ASTM D5769.
D1319 or ASTM D6550.
D3237.
D3231.
D2622.
D5191.

a Incorporated
by reference; see 1065.1010. See 1065.701d for other allowed procedures.
testing at altitudes above 1219 m, the specified initial boiling point range is 23.9 to 40.6 C and the specified volatility range is 52.0 to 55.2 kPa.
c ASTM D6550 prescribes measurement of olefin concentration in mass %. Multiply this result by 0.857 and round to the first decimal place to determine the olefin concentration in volume %.
d Calculate dry vapor pressure equivalent, DVPE, based on the measured total vapor pressure, p , in kPa using the following equation:
T DVPEkPa = 0.956pT 2.39 or DVPEpsi = 0.956pT 0.347. DVPE is intended to be equivalent to Reid Vapor Pressure using a different test method.
e For testing unrelated to evaporative emissions, the specified range is 55.2 to 63.4 kPa.
b For

365. Amend 1065.715 by revising paragraph a to read as follows:

1065.715

Natural gas.

a Except as specified in paragraph b of this section, natural gas for testing
must meet the specifications in the following table:

TABLE 1 OF 1065.715TEST FUEL SPECIFICATIONS FOR NATURAL GAS
Value a
Property Methane, CH4
Ethane, C2H6
Propane, C3H8
Butane, C4H10
Pentane, C5H12
C6 and higher
Oxygen
Inert gases sum of CO2 and N2

Minimum, 0.87 mol/mol.
Maximum, 0.055 mol/mol.
Maximum, 0.012 mol/mol.
Maximum, 0.0035 mol/mol.
Maximum, 0.0013 mol/mol.
Maximum, 0.001 mol/mol.
Maximum, 0.001 mol/mol.
Maximum, 0.051 mol/mol.

a Demonstrate compliance with fuel specifications based on the reference procedures in ASTM D1945 incorporated by reference in 1065.1010, or on other measurement procedures using good engineering judgment. See 1065.701d for other allowed procedures.

1065.720

a Except as specified in paragraph b of this section, liquefied petroleum

366. Amend 1065.720 by revising paragraph a to read as follows:

Liquefied petroleum gas.

gas for testing must meet the specifications in the following table:

lotter on DSK11XQN23PROD with RULES2

TABLE 1 OF 1065.720aTEST FUEL SPECIFICATIONS FOR LIQUEFIED PETROLEUM GAS
Reference procedure a
Property
Value
Propane, C3H8
Vapor pressure at 38 C

Minimum, 0.85 m3/m3
Maximum, 1400 kPa

Volatility residue evaporated temperature, 35 C
Butanes
Butenes
Pentenes and heavier
Propene
Residual matter residue on evaporation of 100 ml oil stain observation Corrosion, copper strip
Sulfur

Maximum, Maximum, Maximum, Maximum, Maximum, Maximum, Maximum, Maximum,
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38 C
0.05 m3/m3
0.02 m3/m3
0.005 m3/m3
0.1 m3/m3
0.05 ml pass c
No. 1
80 mg/kg

E:FRFM29JNR2.SGM

29JNR2

ASTM D2163.
ASTM D1267 or b ASTM D2598.
ASTM D1837.
ASTM D2163.
ASTM D2163.
ASTM D2163.
ASTM D2163.
ASTM D2158.
ASTM D1838.
ASTM D6667.