Date Time Reason Hours down days

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

April 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 down days

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

August 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 down days

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 CW pump 

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

April Total Hours 95.95 4.0
Date Time Reason Hours down days

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

August 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 down days

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 down days

09-Apr-09 11:46 Gauze lit 4.22 0.2

April 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

August 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 down days

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