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§ 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 § 1065.715—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. |