Ultra low emission technology 3 When using the SCR denitration ultra-low emission technology 3LCI data set, attention should be given to the system boundaries defined within the Life Cycle Inventory analysis. The inclusion of upstream and downstream processes such as manufacture of catalysts, operational energy inputs, and end-of-life treatments of emissions control equipment should adhere to the LCA methodology standards. Users should also consider the representativeness of the data for the specific technological and geographical scenarios being evaluated.