3.C: Louisiana

Louisiana has only one gasoline quality standard, and it is a conventional gasoline. The state’s fuel quality regulations adopt the most recent version of ASTM D4814 Standard Specification for Spark-Ignition Engine Fuel. The applicable federal parameters and limits are listed in Fig. 1 of Part 1 of this report, whereas the applicable, non-volatility-related ASTM D4814 parameters and limits are listed in Fig. 3 of Part 1 of this report.

The state regulations also dictate that the state’s volatility standards “shall not be more restrictive than” those allowed by current EPA waivers: effectively, this extends a 1-psi waiver during the summertime control period (i.e. from June 1 to September 15) for blends of at least E9 and at most E15. The regulations also allow for variances o