1.0 Diesel Exhaust Fluid (DEF): The Diesel Exhaust Fluid shall be AUS 32 (Aqueous Urea Solution 32.5%), designed specifically for use in Selective Catalytic Reduction (SCR) systems to reduce emissions of oxides of nitrogen (NOx) from diesel engine transit buses. 1.1.1 The Diesel Exhaust Fluid shall meet the requirements as outlined in the specifications section of Cummins Service Bulletin No. 4021566, latest revision. The urea content of the DEF solution shall be 32.5 percent +/- 1.5 percent by weight. DEF shall meet ISO 2224-1, the latest revision, for diesel engines and be certified by the American Petroleum Institute (API). 1.1.2 The product shall be safe to handle, non-explosive, non-flammable, nontoxic, non-polluting, stable, colorless, biodegradable, and composed of urea and water. 1.1.3 DEF shall have a minimum shelf life of (12) months from delivery. Authority’s storage tanks are located indoors at each location. 1.1.4 The DEF shall be compatible with equipment installed on Cumminsmanufactured diesel engines with SCR systems and for the applicable model year. 1.1.5 Agricultural grade urea mixes are unacceptable on this contract and do not meet Cummins Engines Inc.'s specifications.
