Keystone led efforts to mitigate findings from HAZOP reviews.  Keystone assisted at5 different locations and the review scope ranged from 10 to 90 items.  Keystone was able to mitigate 65% of these findings without facility modifications, using additional analysis tools and process modelling.  If modifications were necessary, Keystone worked to minimize the field scope for most to a coding change or addition of a monitoring point.  For larger multi-discipline items, Keystone handled the design effort and coordinated installation with existing turnaround planning efforts.