North Sea Decommissioning Estimates - Phase 2 - Corrections to Report Supplementary information to a report presenting the results of a platform decommissioning study and phase 2 cost estimates prepared for the then-operator Oryx. This volume includes detailed information on the report authors' proposed methods for each of five major decommissioning cost components, and a review of regulations applicable to North Sea platform decommissioning. Twachtman Snyder and Byrd Inc August 1997