Attachment A - Operation and Maintenance Summary

Commenced Restart Description

4/25/99 5/3/99

Reworked compressor blow off valves. Installed new catalyst. Minor maintenance repairs, & calibration of 

instrumentation.

12/6/99 12/16/99

Plant shut down on Dec 6th due to high inventory. Repaired steam leaks, Replaced Some Valves and Re 

certification of PSV’s. 

12/29/00 1/12/00

Y2K turnaround. Inspected equipment and made minor repairs where necessary. Installed new catalyst. 

Remove, repair & reinstall catalyst support grid.

5/10/00 5/17/00 Shutdown for repair of expansion joint liners. Design deficiency found in many expansion joint liners.

10/4/00 10/9/00 Inventory shutdown- Minor maintenance repairs where necessary.

10/10/00 12/29/00

Major air compressor wreck. Replaced all air compressor internals. Inspect X-101 gearbox buy Lufkin 

industries. MOC-2000-090 P220,230,240,113,114,150,195A/B HOA. Change distance piece on P-200 to SS. 

Minor maintenance repairs where necessary & calibration of instrumentation that needed a S/D.

4/23/01 4/28/01

Inventory shutdown- Minor maintenance repairs where necessary & calibration of instrumentation that needed 

a S/D.

5/29/01 6/13/01

Inventory shutdown- CEG, Turbine inspection. Inspection for Air Compressor. Repack steam valve on C101D. Minor maintenance repairs where necessary & calibration of instrumentation that needed a S/D.

1/6/02 1/11/02

Shutdown to replace blades in air compressor. Better design. CEG, ELLIOTT, SULZER REP and GHH REP 

FOR C-101A, Minor maintenance repairs where necessary & calibration of instrumentation that needed a 

S/D.

4/14/02 4/19/02

Gauze change. Critical motors elect tested, Install smart positioners, Replace steam drum sight glass root 

valves, Replace filters and Inspections were done. 

5/17/02 5/24/02

Shutdown due to inventory. While down changed SCR catalyst. Changed Foxboro Board, electronic 

overspeed checked machines. 

12/8/02 12/14/02 Gauze change. Minor maintenance repairs where necessary & calibration of instrumentation that needed a 

S/D.

12/14/03 12/19/03 Gauze change. SCR Level checked, Replaced filters, Calibrations of Instrumentation, Minor Maintenance 

Repairs

10/11/04 10/18/04 Air Comp, Expander, and Turbine were all inspected during turnaround. Changed compressor inlet air filters. 

Re certification of relief valves, Vessel and exchangers inspections

5/14/05 5/19/05 Inventory shutdown- Re certification of relief valves, Minor maintenance repairs where necessary & calibration 

of instrumentation that needed a S/D.

9/11/05

9/18/05

Modified boiler and changed gauze. Inspections for C101D, C101A Compressor Train, Re certification of 

relief valves, Vessel and exchangers inspections, Minor maintenance repairs where necessary & calibration 

of instrumentation that needed a S/D.

9/21/05 10/2/05 Hurricane Rita, Replace zinc cooling tower hangers and minor maintenance repairs that were necessary

12/11/05 12/18/05

Replace Neugent With 3-Way Valves, TRICONEX Service Work, Re certification of relief valves, Vessel and 

exchangers inspections, Minor maintenance repairs where necessary & calibration of instrumentation that 

needed a S/D.

4/23/06 4/29/06

Gauze change and DCS upgrade. Re certification of relief valves, vessel and exchangers inspections, Minor 

maintenance repairs where necessary & calibration of instrumentation that needed a S/D.

10/16/06 10/21/06

Plant shutdown & repair due to malfunction of Baluff linear transducer (device that provides the Steam turbine 

governor valve SVC-6101 position feedback signal). Also repaired XV-6845 NOx compressor kick back 

valve that had broken stem. Weld repair E-101-A1

12/3/06 12/9/06

Gauze change. Install Tie-Ins For Acid Cooler, Re certification of relief valves, vessel and exchangers 

inspections, Minor maintenance repairs where necessary & calibration of instrumentation that needed a S/D.

6/8/07 6/22/07

Gauze change. Maintenance overhaul of Air Compressor C-101A, Inspect Steam Turbine, C-101D, Re 

certification of relief valves, Vessel and exchangers inspections, Minor maintenance repairs where necessary

& calibration of instrumentation that needed a S/D.

12/2/07 12/8/07

Gauze change. Repair Weld Leak On Tank D @ Manway Reinforcement Pad, Nox Compressor Work C101-

B.Re certification of relief valves, Vessel and exchangers inspections, Minor maintenance repairs where 

necessary & calibration of instrumentation that needed a S/D.

9/11/08 9/22/08 Hurricane Ike. Minor work and repairs.

11/2/08 11/9/08

Turnaround with inspections. Installed steam and condensate revision project. Re certification of relief 

valves. Minor maintenance repairs where necessary & calibration of instrumentation that needed a S/D.

11/12/08 11/17/08 Inventory outage. Minor maintenance repairs that were necessary & calibrations of instrumentation.

11/23/08 11/30/08 Inventory outage. Minor maintenance repairs that were necessary, PM's & calibrations of instrumentation.

12/16/08 12/23/08

Inventory outage. Re certification of relief valves, vessel and exchangers inspections, Minor maintenance 

repairs where necessary & calibration of instrumentation that needed a S/D.

1/1/09 1/5/09

Inventory outage. Minor maintenance repairs where necessary & calibration of instrumentation that needed a 

S/D.

2/17/09 3/9/09

Turnaround inspection work. Down mainly due to low demand. Minor maintenance repairs where necessary

& calibration of instrumentation that needed a S/D.

10/12/2009 10/30/2009

Turnaround inspection work. Maintenance work on exchangers, compressors, computers and other smaller 

items.

Turnaround > 5 days