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UNLEADED ULTRA LOW SULFUR LOW SULFUR FUEL HIGH SULFUR FUEL High Grade Red with white cross. Add white ring for ethanol blend. Yellow with letter U Diesel Yellow Yellow with blue stripe Middle grade Blue with white cross. Add white ring for ethanol blend #1 Fuel Oil Purple with yellow stripe Purple with yellow & blue stripe White with black cross Add black ring for ethanol blend #2 Fuel Oil Green Green with blue stripe OBSERVATION OR MONITORING WELL Black Triangle Brown with letter U Kerosene Brown Brown with Blue Stripe ALCOHOL-BASED FUELS Dark Tan: See 2.5.1 for spe- cific requirements BIODIESEL Brown with yellow border: See 2.4.1 for specific re- quirements Purple Vapor Recovery orange API EQUIPMENT MARKING COLOR-SYMBOL SYSTEM GASOLINES DISTILLATES Waste Oil U U E85 B2