ARB carefully planned and orchestrated the work necessary to optimize the placement of the SCR unit at ChevronTexaco's Kern River Co-gen Facility. The project involved creating space between Economizer ll and l by moving the stack, modification of the duct section, connection of the economizer tubes and setting the new SCR module. After 61 days of pre-shutdown site work, the actual movement and installation was accomplished with only five days of down time. Upon completion, the installation ensured that the catalyst operates within the ideal temperature range, and the new economizer helped to improve steam generation.