**Date Time**  **Reason Hours dow** **n day** **s** 15-Jan-07 5:50 Fuses blew on power pole to Acid Plant. **Util. - non** 16-Jan-07 12:48 Gauze lit 30.97 1.3 20-Jan-07 23:08 Plant tripped for no known reason **Inst. - non**  21-Jan-07 1:08 Gauze lit 2.00 0.1 22-Jan-07 11:00 Plant tripped on E-604 Low Level**Stat. - non**  22-Jan-07 16:56 Gauze lit 5.93 0.2 23-Jan-07 5:10 Plant tripped on low lube oil press **Inst. - non**  23-Jan-07 8:30 Gauze lit. 3.33 0.1 **January Total Hours**  42.23 1.8 Externally caused 0.00 0.0 25-Feb-07 10:15 SD Plant for Gauze Change & DCS upgrade**SPO (short planned outage)** 28-Feb-07 0:00 85.75 3.6 **February**

**Total Hours** 85.75 3.6 Externally caused 85.75 3.6 01-Mar-07 0:00 SD Plant for Gauze Change & DCS upgrade**SPO (short planned outage)** 04-Mar-07 7:24 Gauze lit. 79.40 3.3 **March Total Hours** 79.40 3.3 Externally caused 79.40 3.3 **Ap ril Total Hours**  0.00 0.0 Externally caused 0.00 0.0 21-May-07 0:50 SD Plant for Gauze Change & other work **SPO (short planned outage)** 21-May-07 21:42 Gauze lit. 20.87 0.9 22-May-07 0:28 SD Plant because couldn't stay under Nox limit because Mix Gas temp probe not put in completely.**HF** 22-May-07 1:09 Gauze lit 0.68 0.0 **May Total Hours**  21.55 0.9 Externally caused 0.00 0.0

07-Jun-07 5:08 SD Plant to replace UAN Plant main electrical breaker.**SPO, I&E, Stat.Equip** 09-Jun-07 18:49 Gauze lit 61.68 2.6

21-Jun-07 9:55 Air Comp, Acid Plant, & AN Plant tripped for no apparent reason.**SPO, I&E, Stat.Equip** **Date Time**  **Reason Hours dow** **n day** **s** 21-Jun-07 16:08 Gauze lit 6.22 0.3 **June Total Hours** 67.90 2.8 Externally caused 0.00 0.0 **July Total Hours**  0.00 0.0 Externally caused 0.00 0.0 03-Aug-07 5:45 Tripped Acid Plant because couldn't get second cooling water pump or gas compressor running. **ME, I&E** 04-Aug-07 20:08 Gauze lit 38.38 1.6 **Au gust Total Hours**  38.38 1.6 Externally caused 0.00 0.0 09-Sep-07 12:07 Shut down for Turnaround**TA** 18-Sep-07 11:19 Gauze lit 215.20 9.0 **September Total Hours** 215.20 9.0 Externally caused 0.00 0.0 **October Total Hours** 0.00 0.0 Externally caused 0.00 0.0 05-Nov-07 3:45 Shut down for Gauze Change**SPO** 05-Nov-07 16:15 Gauze lit 12.50 0.5 05-Nov-07 16:20 Shut down (E-605 flange leak)**SE** 05-Nov-07 18:30 Gauze lit 2.17 0.1 05-Nov-07 22:00 Shut down (E-615 leaking Nox)**SE** 10-Nov-07 19:25 Gauze lit 117.42 4.9 10-Nov-07 23:33 Acid Plant tripped (Unknown reason) **I&E** 11-Nov-07 8:16 Gauze lit 8.72 0.4 11-Nov-07 8:50 Acid Plant tripped (B-601 level high) **HF/I&E** 11-Nov-07 12:11 Gauze lit 3.35 0.1 11-Nov-07 13:35 Acid Plant tripped (E-615 trip broken wire) **I&E** 11-Nov-07 20:45 Gauze lit 7.17 0.3 24-Nov-07 16:42 Acid Plant tripped (PG&E power failure) **LU &SE** 25-Nov-07 22:06 Gauze lit 29.40 1.2 **November Total Hours** 180.72 7.5 Externally caused 29.40 1.2 01-Dec-07 10:10 Acid Plant, Neutralizer, Process Air Compressor tripped**I&E** 01-Dec-07 21:53 Gauze lit 11.72 0.5**Date Time**  **Reason Hours dow** **n day** **s December Total Hours**  11.72 0.5 Externally caused 0.00 0.0 04-Jan-08 9:20 Acid Plant Tripped.**Util** 05-Jan-08 16:58 Gauze lit 31.63 1.3

26-Jan-08 15:23 Lost gas compressor because CWpump tripped. Tripped Acid Plant. **ME/SPO** 31-Jan-08 0:00 Plant still down. 128.62 5.4 **January Total Hours**  160.25 6.7 Externally caused 31.63 1.3 01-Feb-08 0:00 Plant still down**SPO** 02-Feb-08 19:50 Gauze lit 43.83 1.8 02-Feb-08 20:28 Gauze tripped on high Gauze temp. MTL not tuned correctly.**SPO** 03-Feb-08 1:07 Gauze lit. 4.65 0.2 05-Feb-08 10:30 Gauze tripped on high Gauze temp. PT634 lost power.**I&E** 05-Feb-08 16:50 Gauze lit. 6.33 0.3 07-Feb-08 4:30 Gauze out for Gauze change, PSV replacement**ME** 07-Feb-08 16:38 12.13 0.5 14-Feb-08 18:06 Complete Power Failure**Util.** 15-Feb-08 15:08 Gauze lit. 21.03 0.9 **February**

**Total Hours** 87.98 3.7 Externally caused 21.03 0.9 **March Total Hours** 0.00 0.0 Externally caused 0.00 0.0 07-Apr-08 12:15 Acid Plant tripped for unknown reason. **I&E** 07-Apr-08 16:32 Gauze lit 4.28 0.2 07-Apr-08 17:25 Acid Plant tripped for unknown reason. (After researching, it looks like TSHH-606 is culprit.)**I&E** 10-Apr-08 10:51 Gauze lit. 65.43 2.7 15-Apr-08 12:28 Tripped Acid Plant because of pre-ignition before Converter.**Process** 16-Apr-08 1:54 Gauze lit. 13.43 0.6 20-Apr-08 0:00 Tripped Acid Plant because 3" air line to Expander blew apart.**Stat. Equip.** 20-Apr-08 12:48 Gauze lit. 12.80 0.5 **Ap ril Total Hours**  95.95 4.0**Date Time**  **Reason Hours dow** **n day** **s** Externally caused 0.00 0.0 20-May-08 18:55 Power failure tripped Plant. B-601 inoperable.**Utilities** 22-May-08 1:25 Gauze lit. 30.50 1.3 **May Total Hours**  30.50 1.3 Externally caused 30.50 1.3

03-Jun-08 21:27 Plant tripped for unknown reason. Process Air Compressor, Acid Plant, and Aneutralizer all tripped. **I&E** 04-Jun-08 3:01 Gauze lit. 5.57 0.2 **June Total Hours** 5.57 0.2 Externally caused 0.00 0.0 02-Jul-08 3:30 Shutdown Plant for Gauze Change.**SPO** 03-Jul-08 1:00 Gauze lit. 21.50 0.9 06-Jul-08 19:38 Plant tripped for unknown reason. **I&E** 06-Jul-08 22:01 Gauze lit. 2.38 0.1 **July Total Hours**  23.88 1.0 Externally caused 0.00 0.0 **Au gust Total Hours**  0.00 0.0 Externally caused 0.00 0.0 11-Sep-08 7:40 Tripped Plant because lost ammonia with power failure on Ammonia side. **I&E** 11-Sep-08 14:16 Gauze lit. 6.60 0.3 11-Sep-08 14:44 Acid Plant tripped on High Decomposer Temperature**HF** 11-Sep-08 21:15 Gauze lit 6.52 0.3 28-Sep-08 12:00 Tripped Acid Plant for Shutdown.**TA /SD**  30-Sep-08 23:59 Plant still down for Shutdown 60.00 2.5 **September Total Hours** 73.12 3.0 Externally caused 0.00 0.0 01-Oct-08 0:00 Acid Plant down for Shutdown.**TA /SD**  04-Oct-08 12:49 Gauze lit. 84.82 3.5 04-Oct-08 13:31 Tripped Acid Plant. E-604 PSV lifting because chain valve barely open. **HF** 04-Oct-08 15:46 Gauze lit 2.25 0.1 05-Oct-08 2:00 SD Acid Plant. Dollinger Filter gasket blew out. Wrong gasket put in. **HF** 05-Oct-08 7:15 Gauze lit 5.25 0.2**Date Time**  **Reason Hours dow** **n day** **s** 09-Oct-08 2:02 Acid Plant tripped on high Mixed Gas temperature.**I&E** 09-Oct-08 5:17 Gauze lit 3.25 0.1 **October Total Hours** 95.57 4.0 Externally caused 0.00 0.0 **November Total Hours** 0.00 0.0 Externally caused 0.00 0.0

18-Dec-08 10:25 Acid Plant tripped on loss of power. Fuse holder on pole went bad. Our equipment **I&E** 19-Dec-08 10:00 Gauze lit 23.58 1.0 20-Dec-08 11:45 Acid Plant tripped on loss of power. PG&E.**Utilities** 21-Dec-08 1:15 Gauze lit 13.50 0.6 21-Dec-08 5:07 Acid plant tripped on high Mixed Gas temperature.**I&E** 23-Dec-08 23:00 Gauze lit 65.88 2.7 **December Total Hours** 102.97 4.3 Externally caused 79.38 3.3 08-Jan-09 15:30 Shut down Acid Plant for Inventory Control.**Mkt.** 31-Jan-09 23:59 Acid Plant still down for Inventory control 560.50 23.4 **January Total Hours**  560.50 23.4 Externally caused 560.50 23.4 01-Feb-09 0:00 Shut down Acid Plant for Inventory Control.**Mkt.** 28-Feb-09 23:59 Acid Plant still down for Inventory control 672.00 28.0 **February**

**Total Hours** 672.00 28.0 Externally caused 672.00 28.0 01-Mar-09 0:00 Shut down Acid Plant for Inventory Control.**Mkt.** 31-Mar-09 23:59 Acid Plant still down for Inventory control 744.00 31.0 **March Total Hours** 744.00 31.0 Externally caused 744.00 31.0 01-Apr-09 0:00 Plant down for inventory control **Mkt.** 06-Apr-09 7:34 Gauze lit 127.57 5.3 07-Apr-09 6:37 Power failure tripped Acid Plant **Util.** 07-Apr-09 16:07 Gauze lit 9.50 0.4 09-Apr-09 7:33 I&E tripped Acid Plant**I&E Date**  **Time Reason**  **Hours dow n**  **day s**  09-Apr-09 11:46 Gauze lit 4.22 0.2 **Ap ril Total Hours**  141.28 5.9 Externally caused 137.07 5.7 02-May-09 6:15 Power failure tripped Acid Plant **Util.** 02-May-09 17:13 Gauze lit 10.97 0.5 02-May-09 17:23 Lost B-601**Stationary Equip.**  02-May-09 18:11 Gauze lit 0.80 0.0 26-May-09 10:19 High temp Gauze tripped Acid Plant.High temp caused by loss of signal to PT634.**I&E** 26-May-09 17:37 Gauze lit 7.30 0.3 **May Total Hours**  19.07 0.8 Externally caused 10.97 0.5 **June Total Hours** 0.00 0.0 Externally caused 0.00 0.0 08-Jul-09 2:17 Closed ammonia to Gauze for Gauze change.**SPO** 08-Jul-09 23:06 Gauze lit 20.82 0.9 **July Total Hours**  20.82 0.9 Externally caused 0.00 0.0 02-Aug-09 7:30 Closed ammonia to Gauze for inventory control.**Marketing** 31-Aug-09 23:59:59 Plant still down for inventory control. 712.50 29.7 **Au gust Total Hours**  712.50 29.7 Externally caused 712.50 29.7 01-Sep-09 0:00 Still down for inventory control/TA. **Marketing** 27-Sep-09 21:08:00 Gauze lit 645.13 26.9 27-Sep-09 21:15:00 Decomposer cooled off too much. **HF** 27-Sep-09 22:06:00 Gauze lit 0.85 0.0 **September Total Hours** 645.98 26.9 Externally caused 645.13 26.9 **October Total Hours** 0.00 0.0 Externally caused 0.00 0.0 25-Nov-09 7:56 Power Failure after which B-601 wouldn't operate.**Utilities** 28-Nov-09 1:37:00 Gauze lit 65.68 2.7 28-Nov-09 2:06:00 Decomposer cooled off too much. Closed ammonia to Gauze.**ME** 28-Nov-09 5:11:00 Gauze lit 3.08 0.1**Date Time**  **Reason Hours dow** **n day** **s** 28-Nov-09 5:28:00 Decomposer cooled off too much. Closed ammonia to Gauze.**ME** 28-Nov-09 6:03:00 Gauze lit 0.58 0.0 28-Nov-09 6:09:00 Decomposer cooled off too much. Closed ammonia to Gauze.**ME** 28-Nov-09 6:44:00 Gauze lit 0.58 0.0 28-Nov-09 6:56:00 Decomposer cooled off too much. Closed ammonia to Gauze.**ME** 28-Nov-09 9:40:00 Gauze lit 2.73 0.1 **November Total Hours** 72.67 3.0 Externally caused 65.68 2.7 09-Dec-09 0:52:00 Stopped ammonia to Gauze to prep for Gauze change.**SPO** 10-Dec-09 3:03:00 Gauze lit 26.18 1.1 10-Dec-09 3:15:00 CEMS not working properly. **I&E** 10-Dec-09 10:00:00 Gauze lit 6.75 0.3 10-Dec-09 10:26:00 Decomposer cooled off too much. Closed ammonia to Gauze.**ME** 10-Dec-09 10:55:00 Gauze lit 0.48 0.0 **December Total Hours** 33.42 1.4 Externally caused 0.00 0.0 Power failure followed by broken nipple 03-Jan-10 8:07:00 on E-608 and LT problem with E-601 **Util.** 04-Jan-10 0:37:00 Gauze lit 16.50 0.7 04-Jan-10 1:00:00 Decomposer cooled off too much. Closed ammonia to Gauze.**ME** 04-Jan-10 1:40:00 Gauze lit 0.67 0.0 **January Total Hours**  17.17 0.7 Externally caused 16.50 0.7 02-Feb-10 10:40:00 Shut down to replace cracked piping on inlet E-606.**SE** 02-Feb-10 19:32:00 Gauze lit 8.87 0.4 02-Feb-10 20:00:00 Decomposer cooled off too much. Closed ammonia to Gauze.**SE** 02-Feb-10 20:54:00 Gauze lit 0.90 0.0 **February**

**Total Hours** 9.77 0.4 Externally caused 0.00 0.0