The Unit A Turbine overhaul scope of works includes:

• Complete dismantling of both Unit A Turbines, A1 & A2;

• Detailed “as found” survey, inspection and measurement of all rotating to static component clearances, concentricity’s and overall dimensions

• Internal Surface preparation, Non-Destructive Testing (NDT), Repair and internal re coating of all Turbine fixed Piping and spiral casings, including the penstock (turbine side of TIV outlet flange to the spiral casing inlet), turbine spiral casing, and lined section of draft tube elbow;

• Overhaul of critical static sealing surfaces, including on site machining of the spigot and face diameters on the turbine distributer rings as may be required to restore their condition;

• Precision surveying (e.g.: Laser survey) and measurement of on-site alignment and “as machined” dimensions;

• Cleaning, inspection and as required repair of both Turbine runners;

• Installation of new OEM supplied Upper and Lower Turbine covers (supplied free issue by Pacific Blue), machined to match the refurbished distributer rings;

• Removal and replacement of Critical Bolting (Upper and Lower Cover Bolting to be supplied Free Issue by Pacific Blue);

• Machining, installation and alignment checks of new OEM supplied sealing rings to re-establish correct axial position and radial clearances between rotating and stationary components;

• Installation of new OEM supplied Guide Vanes – two complete sets of (20) new guide vanes for each Turbine;

• Detailed assembly and clearance checks upon reassembly; and

• Recommissioning checks and activities, in conjunction with Pacific Blue Operational staff.

(collectively referred to as ‘Planned Turbine Overhaul Works’)

Exclusions to the Scope of Work

The following work is excluded from the Planned Turbine Overhaul Works:

(i) Overhaul of the Turbine Inlet Valves (TIV’s). These are presently in good condition however should work be identified, it will be undertaken via resources arranged by Pacific Blue;

(ii) Removal of the Unit A Generator & Flywheel. Note that the Overhaul of these items is excluded, and it is intended to leave these items in position for the duration of the Planned Turbine Overhaul Works. As such particular attention will be required to safeguard both Unit A and Unit B Generators from Dust ingress as detailed in the attached scope of works; and

(iii) Overhaul of Unit A mechanical, hydraulic or electrical auxiliaries unless otherwise indicated in the overhaul specification.