Sioux City-Terra Industries Inc. said April 1 that Terra Environmental Technologies Inc. (TET), a wholly-owned Terra subsidiary, has signed a multi-year agreement with Excelda Manufacturing Co. (Excelda). Under the terms, Excelda will package and distribute TerraCair Ultrapure® Diesel Exhaust Fluid (DEF) in package sizes of 50 gallons or less, and specialize in one- to 2.5-gallon containers. TerraCair Ultrapure® DEF is a nitrogen-based urea solution that helps clean the air by reducing nitrogen oxide (NOx) emissions from the exhaust stream of diesel engines. Its use is driven by legislation set to take effect in 2010 that will require new on-road vehicles with diesel engines to meet more stringent emissions requirements. This agreement will allow Excelda to make TerraCair Ultrapure® DEF available to new end-use markets, including original equipment manufacturers (OEMs), automotive fluid distributors, truck stops, and a variety of retail outlets. This agreement complements one that TET signed with Brenntag North America (Brenntag) in December 2008. Together, the Excelda and Brenntag agreements provide avenues for TET to distribute TerraCair Ultrapure® DEF in package sizes ranging from one-gallon containers to bulk truckloads. Excelda will package TerraCair Ultrapure® DEF at its primary facility in Fowlerville, Mich.