Table 1 of § 1065.715 -Test Fuel Specifications for Natural Gas
Property | Value a |
Methane, CH4 | Minimum, 0.87 mol/mol. |
Ethane, C2H6 | Maximum, 0.055 mol/mol. |
Propane, C3H8 | Maximum, 0.012 mol/mol. |
Butane, C4H10 | Maximum, 0.0035 mol/mol. |
Pentane, C5H12 | Maximum, 0.0013 mol/mol. |
C6 and higher | Maximum, 0.001 mol/mol. |
Oxygen | Maximum, 0.001 mol/mol. |
Inert gases (sum of CO2 and N2) | 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 § 1065.701(d) for other allowed procedures.
40 C.F.R. §1065.715