Keystone provided engineering and design services for the replacement of two existing filters and relocation of existing catalyst tanks in the Hydrogenation Unit. The project involved the construction and installation of an intermediate level mezzanine to support the drums and pumps that tie into the filters and tanks. Keystone’s scope of work included an analysis and design modifications of the support structure for the new filters and the relocated catalyst tanks. Additionally, the work scope included the following: surveying of the area for installation purposes of structural modifications and piping, creating an analysis model for the new intermediate mezzanine and overall existing structure, designing/analyzing steel and concrete connection details, creating drawings for modifications to the existing support structure, and creating drawings for the new mezzanine.