3.B: Idaho

The gasoline standard adopted in the state of Idaho, per its Department of Agriculture, is ASTM D4814 Standard Specification for Spark-Ignition Engine Fuel: the version referenced in the state regulation is D4814-16e. Applicability of the ASTM parameters and limits encompass only parameters and limits not already specified by the Clean Air Act and federal Environmental Protection Agency (EPA) regulations. These federal parameters and limits are listed in Fig. 1 of Part 1 of this report, whereas the applicable ASTM D4814 parameters and limits are listed in Fig. 3 of Part 1 of this report.

Oxygenate blending with gasoline is allowed in the state, in accordance with the EPA’s “substantially similar rulings” and waivers detailed in section 1.B of this report. The Idaho state regulati