You are here: U.S.: overview of gasoline specifications in PADD 5 statesPart 3: State Gasoline Quality Regulations in PADD 5 (Lower 49 states)3.E: Washington
3.E: Washington
Washington adopts a conventional gasoline standard via reference to NIST Handbook 130. The NIST Handbook 130 standard, in turn, adopts ASTM D4814 Standard Specification for Spark-Ignition Engine Fuel by reference. The state does not feature any state fuels or RFG formulations.
However; state regulations do impose modifications to the NIST standard:
    •The V/L=20 temperatures for the respective classes (i.e. 1-5) are raised by several degrees (by as little 3° F for class 5, and as much as 11° F, for class 2) against those of NIST (i.e. ASTM D4814)
    •The full, 1-psi (6.9 kPa) waiver is allowed for months where ASTM volatility class E applies (against 0.5 psi, or 3.5 kPa, prescribed by NIST). This essentially extends a 1-psi (6.9 kPa) waiver to the entire non-control (i.e. winter) p
Contact us for full access
3.E: Washington