Ethanol Blend Specifications
Ethanol-blended gasoline sold in the state must meet ASTM specification D4814, with the following exceptions:
- The maximum vapor pressure of ethanol blends containing 1% or more ethanol for volatility Classes A, B, C, and D may not exceed the ASTM D4814 limit by more than 1.0 pound per square inch (psi); and
- The maximum vapor pressure of ethanol blends containing 1% or more ethanol for volatility Class E may not exceed the ASTM D4814 limit by more than 0.5 psi