Section 58.01.01.725 - RULES FOR SULFUR CONTENT OF FUELSThe reference test method for measuring fuel sulfur content is ASTM method, D129-95 Standard Test for Sulfur in Petroleum Products (General Bomb Method) or such comparable and equivalent method approved in accordance with Subsection 157.02.d. Test methods and procedures must comply with Section 157.
01.Definitions. a. ASTM. American Society for Testing and Materials.b. Distillate Fuel Oil. Any oil meeting the specifications of ASTM Grade 1 or Grade 2 fuel oils.c. Residual Fuel Oil. Any oil meeting the specifications of ASTM Grade 4, Grade 5 and Grade 6 fuel oils.02.Residual Fuel Oils. No person may sell, distribute, use or make available for use, any residual fuel oil containing more than one and three-fourths percent (1.75%) sulfur by weight.03.Distillate Fuel Oil. No person may sell, distribute, use or make available for use, any distillate fuel oil containing more than the following percentages of sulfur:a. ASTM Grade 1. ASTM Grade 1 fuel oil - zero point three percent (0.3%) by weight.b. ASTM Grade 2. ASTM Grade 2 fuel oil - zero point five percent (0.5%) by weight.04.Coal. No person may sell, distribute, use or make available for use, any coal containing greater than one percent (1.0%) sulfur by weight.05.Alternative. The Department may approve in a permit issued in accordance with these rules an alternative fuel sulfur content if the applicant demonstrates that, through control measures or other means, sulfur dioxide emissions (based on a one (1) hour averaging period) are equal to or less than those resulting from the combustion of fuels complying with the limitations of Subsections 725.01 through 725.04.Idaho Admin. Code r. 58.01.01.725