No Date 1 Aug 2015 2 Sept 2015 3 Nov/Dec 2015 4 Action Intention New chemical was introduced to DOX. To improve DOX performance. LP backwash. To clean and improve DOX performance. Feb 2016 Washing oil soaking DOX A/B. To improve DOX performance. 5 March 2016 Dilution chart for Brenst adjusted. To improve DOX performance. 6 April 2016 N2 bubbly. 7 Sep/Oct 2016 8 Feb 2016 E-123 cleaning. EMOC process control of Quench Tower. Improve delta P. Result Flow increased.