OAR 603-027-0440: Storage Tanks

(1) Water in Motor Vehicle Fuel Storage: (a) Water in Gasoline-Alcohol Blends, Biodiesel, Biodiesel Blends, E85 Fuel Ethanol, M85 Fuel Methanol, and Aviation Gas. No water or water-alcohol phase greater than six millimeters (1/4 in) as determined by an appropriate detection paste is allowed to accumulate in any tank utilized in the storage of gasoline-alcohol blend, biodiesel, biodiesel blends, E85 fuel ethanol, M85 fuel methanol, and aviation fuel. (b) Water in Gasoline, Diesel, Biomass-Based Diesel, Biomass-Based Diesel Blends, Gasoline-Ether, and Other Fuels. Water phase shall not exceed 25 mm (1 inch) in depth when measured with water indicating paste in any tank utilized in the storage of diesel, biomass-based diesel, biomass-based diesel blends, gasoline, gasoline-ether blends at retail or nonretail except as required in OAR 603-027-0440(1)(a). (2) Product Storage Identification: (a) Fill Connection Labeling. (A) The fill connection for any motor vehicle fuel or aviation fuel storage tank from which the fuels are dispensed directly into motor vehicle or aircraft fuel tanks shall be permanently, plainly, and visibly marked as to the grade of product contained therein. (B) In addition, storage tank fill connections of non-ethanol blended gasoline shall be permanently, plainly, and visibly marked that the product contained therein is non-ethanol blended gasoline. (b) Declaration of Meaning of Color Code. When the fill connection device is marked by means of a color code, the color code key shall be conspicuously displayed at the place of business.