MSCC Date Duration LBS S02 Reason 

1 st qtr 05 0 

2nd qtr 05 4/2112005 2 hrs 522 Unexpected change in feed gas 

6/14/2005 2 hrs 115 Power malfunction 

6/20/2005 2 hrs 816 Power malfunction 

3rd qtr 05 8/15/2005 2 hrs 1,680 Excessive liquids in feed gas 

8/15/2005 2 hrs 9,519 Excessive liquids in feed gas 

8/15/2005 2 hrs 59 Excessive liquids in feed gas 

9/19/2005 2 hrs 110 Excessive hydrocarbons and vaiable flow 

9/21/2005 2 hrs 106 Excessive hydrocarbons and vaiable flow 

4th qtr 05 10/5/2005 2 hrs 11,645 Power failure of grid/backup power failure 

10/5/2005 2 hrs 12,421 Power failure of grid/backup power failure 

10/13/2005 2 hrs 1,309 

BacKup generator tauure during piannea 

power maintenance 

10/13/2005 2 hrs 2,365 

Mcicup generator failure during planned 

power maintenance 

1 st qtr 06 0 

2nd qtr 06 0 

3rd qtr 06 9/16/2006 2 hrs 7,413 Power failure/other facility malfunctions 

9/16/2006 2 hrs 3,199 Power failure/other facility malfunctions 

4th qtr 06 10/16/2006 2 hrs 8,322 Sulfur Recovery Plant Shutdown and restart 

10/16/2006 2 hrs 5,722 Sulfur Recovery Plant Shutdown and restart 

10/29/2006 2 hrs 350 Excessive hydrocarbons in feed 

1 st qtr 07 0 

2nd qtr 07 6/7/2007 ? 155 Utility power failure 

Conoco 

Phillips Date Duration LBS S02 Reason 

1 st qtr 05 1/7/2005 ? 1,200 ? 

1/18/2005 ? 200 ? 

3/11/2005 ? 10,280 ? . 

2nd qtr 05 4/18/2005 ? 140 ? 

3rd qtr 05 7/1/2005 ? 40 ? 

8/3/2005 ? 36,080 ? 

8/4/2005 ? 1,620 ? 

4th qtr 05 11/21/2005 ? 160 

11/22/2005 ? - 120 ? 

11/23/2005 ? 120 ? 

11/24/2005 ? 120 ? 

11/25/2005 ? 80 ? 

11/26/2005 ? 340 ? 

11/27/2005 ? 60 ? 

11/28/2005 ? 40 ? 

11/29/2005 ? 260 ? 

1 2/7/2005 ? 780 ? - - 

12/26/2005 ? 120 ? 

12/27/2005 ? 280 ? 

12/28/2005 ? 100 ? 

~ 12/29/2005 ? 60 ? 

HHHOYt ( 
12/30/2005 ? 20 ? 

12/31/2005 ? 260 ? 

1 st qtr 06 1l3/2006 

1 ' 

? 80 ? 

174 /2006 ? 6,100 ? 

1/5/2006 ? 2,440 ? 

1/1812006 ? 580 ? 

1/19/2006 ? 220 ? 

1/20/2006 ? 160 ? 

1125/2006 ? 920 ? 

2/7/2006 ? 2,500 ? 

218/2006 ? 2,500 ? 

2/15/2006 ? 300 ? 

2/16/2006 ? 600 ? 

2/17/2006 ? 2,100 ? 

2118/2006 ? 2,000 ? 

2/20/2006 ? 2,000 ? 

2/2212006 ? 1,000 ? 

2/27/2006 ? 2,000 ? 

3/1612006 ? 200 ? 

3/17/2006 ? 800 ? 

3/18/2006 ? 1,400 ? 

312312006 ? 100 ? 

2nd qtr 06 4/9/2006 ? 5,200 ? 

5/15/2006 ? 840 ? 

3rd qtr 06 0 

4th qtr 06 10/28/2006 ? 280 ? 

11/13/2006 ? 40 ? 

11129/2006 ? ' 40 ? 

12120/2006 ? 40 ? 

1 st qtr 07 2/28/2007 ? 200 ? 

3/1/2007 ? 160 ? 

312/2007 ? 860 ? 

3/512007 ? 40 ? 

3/612007 ? 640 ? 

3/712007 ? 240 ? 

3/2412007 ? 1,400 ? 

3/26/2007 ? 1,400 ? 

3127/2007 ? 5,180 ? 

3/2812007 ? 21,500 ? 

2nd qtr 07 417/2007 ? . 40 ? 

5/2/2007 ? 10,800 ? 

5/4/2007 ? 40,800 ? 

5/7/2007 ? 31,400 ? 

5122/2007 ? 6,040 ? 

5/25/2007 ? 6,000 ? 

6/22/2007 ? 4,000 ? 

xxon 

Mobil Date Duration LBS S02 Reason 
1 st qtr 05 3/8/2005 3 hrs 232 Hydrocracker startup 

3/8/2005 3 hrs 188 Hydrocracker startup 

2nd qtr 05 4/11/2005 3 hrs 651 T305 shutdow 

4/11/2005 3 hrs 301 T305 shutdow 

4/11/2005 3 hrs 183 T305 shutdow 

5/17/2005 3 hrs 235 Hydrocracker startup 

5/17/2005 3 hrs 295 Hydrocracker startup 

5/18/2005 3 hrs 300 Hydrocracker startup 

5/18/2005 3 hrs 371 Hydrocracker startup 

5/18/2005 3 hrs 485 Hydrocracker startup 

5/18/2005 3 hrs 491 Hydrocracker startup 

5/18/2005 3 hrs 458 Hydrocracker startup 

5/18/2005 3 hrs 491 Hydrocracker startup 

5/19/2005 3 hrs 505 Hydrocracker startup, 

5/19/2005 3 hrs 518 Hydrocracker startup 

5/19/2005 3 hrs 567 Hydrocracker startup 

5/19/2005 3 hrs 573 Hydrocracker startup 

5/19/2005 3 hrs 526 Hydrocracker startup 

5/19/2005 3 hrs 627 Hydrocracker startup 

5/19/2005 3 hrs 602 Hydrocracker startup 

5/19/2005 3 hrs 589 Hydrocracker startup 

5/20/2005 3 hrs 606 Hydrocracker startup 

5/20/2005 3 hrs 643 Hydrocracker startup 

5/20/2005 3 hrs 684 Hydrocracker startup 

5/20/2005 3 hrs 615 Hydrocracker startup 

5/20/2005 3 hrs 538 Hydrocracker startup 

3rd qtr 05 7/8/2005 3 hrs 312 HCBL Shutdown 

7/8/2005 3 hrs 446 HCBL Shutdown 

7/8/2005 3 hrs 272 HCBL Shutdown 

7/15/2005 3 hrs 320 HCBL Startup 

7/15/2005 3 hrs 837 HCBL Startup 

4th qtr 05 12/27/2005 3 hrs 5,086 FCC startup 

12/27/2005 3 hrs 5,294 FCC startup 

12/28/2005 3 hrs 376 Blocked drain valve leaked to flare 

12/28/2005 3 hrs 441 Blocked drain valve leaked to flare 

12/28/2005 3 hrs 441 Blocked drain valve leaked to flare 

12/28/2005 3 hrs 443 Blocked drain valve leaked to flare 

12/28/2005 3 hrs 442 Blocked drain valve leaked to flare 

12/29/2005 3 hrs 444 Blocked drain valve leaked to flare 

12/29/2005 3 hrs 437 Blocked drain valve leaked to flare 

12/29/2005 3 hrs 433 Blocked drain valve leaked to flare 

12/29/2005 3 hrs 431 Blocked drain valve leaked to flare 

1 st qtr 06 3/7/2006 3 hrs 195 HF3 Shutdown 

3/19/2005 3 hrs 494 Crude startup 

3/19/2006 3 hrs 1,925 Crude startup 

3/19/2005 3 hrs 393 Crude startup 

2nd qtr 06 4/5/2006 3 hrs 153 HF1 startup 

4/13/2006 3 hrs 322 Coker startup 

~ 4/13/2006, 3 hrs 1,697 Coker startup 
4113/2006 3 hrs 2,101 Coker startup 

6/2/2006 3 hrs 392 FCC and ULEB Upset 

3rd qtr 06 712912006 3 hrs 692 

7-=and SV-623 lifted to flare during 

process upset 

8I31/2006 3 hrs' 1,885 C-310 due to pump loss on T-301 

8131/2006 3 hrs 2,884 C-310 due to pump loss on T-301 

9/21/2006 . 3 hrs 191 C-312 due to T-4 Flooding 

4th qtr 06 101412006 3 hrs 249 Crude upset 

1019/2006 3 hrs 177 CHUB startup 

10/1012006 3 hrs 413 CHUB startup 

10/1012006 3 hrs 400 CHUB startup 

10/1012006 3 hrs 156 CHUB startup 

1012212006 3 hrs 160 FCC startup 

10/22/2006 3 hrs 160 FCC startup 

1012212006 3 hrs 160 FCC startup 

1012212006 . 3 hrs 771 FCC startup 

10I22/2006 3 hrs 5,888 FCC startup 

10122/2006 3 hrs 202 FCC startup 

10/2212006 3 hrs 159 FCC startup 

10126/2006 3 hrs 325 ULEB shutdown 

10/26/2006 3 hrs 407 ULEB shutdown 

10126/2006 3 hrs 270 ULEB shutdown 

1013012006 3 hrs 264 SLEB shutdown 

1013012006 3 hrs 158 SLEB shutdown 

1 st qtr 07 111712007 3 hrs 484 V-201 upset 

113012007 3 hrs 1,835 C-311 malfunction 

113012007 3 hrs 266 C-311 malfunction 

314/2007 3 hrs 3,310 V-201 malfunction 

314/2007 3 hrs 279 V-201 malfunction 

3118/2007 3 hrs 1,201 T-201/T-203 malfunction 

2nd qtr 07 511112007 3 hrs 480 C-311 vibration malfunction 

CHS Inc. Date Duration LBS S02 Reason 

s qr 05 0 7 2nd qtr 05 412212005 2 hrs 335 

aware valve to flare open during SR= 

shutdown 

4122 to - 

14/23/05 

1/2 hr & 

45 min 354 

Not aware valve to flare open during SRO 

shutdown 

6/712005 12 min 1,595 Zone D SRU tripped due to power loss 

3rd qtr 05 71712005 23 min 700 SRU tripped 

-- 

8/7/2005 3.75 hrs 6,200 

Ultra Low 5ulfur Diesel Unit (ULSU) firsttime startup 

4th qtr 05 10/612005 5 min 396 Unexpected shutdown of Zone A SRU 

10123/2005 2.5 hrs 60 Zone D SRU 

TNT F---- 

10/30 60 hrs 14,940 Zone D SRU shutdown 

1111312005 14 hrs 864 Zone D SRU startup 

11114/2005 12 min 200 ULSD startup 

11129/2005 15 min 482 ULSD compressor shutdown unexpectedly 
11/30/2005 18 min 579 ULSD compressor shutdown unexpectedly 

1st qtr 06 1/27/2006 22 min 1,171 

Faulty low level reading in waste neat boiier 

shut down Zone D SRU 

2/17/2006 25 min 249 ULSD hydrogen shutdown 

2nd qtr 06 4/7/2006 9 min 190 FCC wet gas comressor tripped 

5/19/2006 ? 21,400 ? 

6/7/2006 30 min 479 

Zone u ULSU Unit c;-902A compressor 

tripped . 

3rd qtr 06 0 

4th qtr 06 11/25/2006 2 hrs 4,160 

Zone B Low pressure vapor recovery 

compressor failed 

1 st qtr 07 0 

2nd qtr 07 5/16/2007 10 hrs 3,500 

rower dip - while changing feed to 

Substation 2 

6/13/2007 1 hr 1,940 Acid gas flaring - due to fire in #2 SRU boiler 

~ 6/22/2007 51 min 1,200 Steam control valve failure for MDEA 
09/10/07 MON 10 :50 FAX 406 247 4456 MT FCSS 

PERMITTING & COMPLIANCE DIVISION 

AIR RESOURCES MANAGEMENT BUREAU 

Billings Regional Office 

Phone: 406-247-4445 Airport Business Park IP-9 

1371 Rimtop Drive Fax 406-247-4456 Billings, MT. 59105-1978 

FAX COVER SHEET 

DATE: ~ - /d ° 2CO-1 

TO : LAvtP-tF- C)ZrRAwf~ - ots P- PA f2--9 

5 a3- -,3 /2-44, 1 -7 

FROM: 

FAX NO. ~~~ ~ 3/Z-6fiog 

N 

PAGES: 11 (including this one) . 

Comments: zCOG e zo6 "J QTfz.C.~ 1=l,ft/1.~ R-jq- r' :6 9 TS 

Z001 
09/10/07 MON 10 :51 FAX 406 247 4456 MT FCSS a 002 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Second Quarter 2007 

Hours Emissions Emission 

Date MST Ibs S02 Point Cause Corrective Action 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

Trackable Events ' 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

617/2007 20:12 155 100-m Utility power failure Prompt start of 

flare caused shutdown of emergency generator. 

process air blower motors Utility power was restored 

and the activation of a before the transfer could 

burner safe ty device on be made to qenerator - 

down the fuel supply to motors and incinerator 

the incinerator. fuel supply were quickly 

restored: 

AQP 2611-0311 .A.14 
09/10/07 MON 10 :52 FAX 406 247 4456 MT FCSS 

4.0 FLARE EMISSIONS 

Section II .A.14 of Air Quality Permit 2611-03 and Exhibit A-1 of the Stipulation of June 

1998 provide for tracking flare emissions in excess of the de minimis activity level of 50 

pounds per three-hour period . Section 1 .13 of OP2611-03 and both the August 1996 and 

the June 1998 Stipulations provide exceptions for flare emissions in excess of 150 pounds 

per three-hour period associated with startups, shutdowns, and malfunctions (events 

beyond the control of the source). In accordance with ARM 17 .8 .110, emissions due to 

startups/shutdowns and malfunctions must be reported to MDEQ in a timely fashion. These 

excepted emissions result from the bypassing of the sulfur recovery unit (SRU) acid gas 

feed to the flares. In accordance with the Stipulation, the reported and tracked data do not 

include de minimis flaring activities (that is, those that result in emissions from the flare of 

less than 50 pounds per three-hour period). 

Table 16 shows that during the first quarter there were no reportable and no trackable 

flaring events logged . 

A de minimis flaring event occurred on March 6, 2007, when a malfunction affecting the 

sulfur recovery unit (SRU) occurred resulting in four very brief periods of flaring between 

approximately 1 :02 and 1 :20 am MST. Tests showed that feed gases to the SRU 

contained excessive hydrocarbons or other insoluble content in the incoming acid gas. No 

cause for the upset could be determined by the refinery. Acid gases were flared at the 

100-meter flare emitting approximately 39 pounds of S02. 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

_ First Quarter 2007 

Emissions Emission 

Date Hours (Ibs S02) Point Cause Corrective Action 

MST 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

Trackable Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

AQP 2611-0311.A .14 

46 
09/10/07 MON 10 :54 FAX 406 247 4456 MT FCSS 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Fourth Quarter 2006 

Emission Emission 

Date Hours s Point 

(MST) (Ibs SO?) 

Short sulfur recovery 

plant shutdown and 

restart to perform 

necessary repairs 

Cause 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

10/1612006 1 9-11 1 8,322 1 100-m flare 

10/1612006 1 12-14 1 5,7220 

10/29/2006 

Corrective Action 

Scheduling so that the 

shutdown occurred at a 

time of exceptionally low 

refinery production of acid 

gases; cooperating with 

the refinery so that their 

backup fuel gas 

scrubbing unit was in 

operation; multiple work 

crews and extra operating 

crew to minimize 

emissions, flaring time, 

and the potentiai for 

extended downtime. Trackable Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

21-23 350 100-m flare 

AQP 2611-0311,A .14 

Excessive hydrocarbons 

in the feed gases which 

likely created a large and 

varying air demand in the 

SRU; and, 

simultaneously, a 

malfunctioning "Ratio" 

analyzer that controls the 

process air flow to the 

SuperClaus. The 

malfunctioning Ratio 

analyzer likely adjusted 

process air flow 

incorrectly during varying 

air demand. 

Troubleshooting the 

process air supply 

identified the partially 

plugged Ratio analyzer, 

trying to determine and 

correct what may have 

allowed the sample fine to 

plug. Removing the 

unidentified hard deposit 

found in the sample line 

allowed the analyzer to 

resume proper operation . 

The SuperClaus catalytic 

bed temperature was 

reduced to its normal 

operating range and the 

unit was restarted . 

Discussions with the 

refinery to try to identify 

the cause of the analyzer 

sample line plugqinq. 
09/10/07 MON 10 :55 FAX 406 247 4456 MT FCSS Z005 

r 

i 

4 .0 FLARE EMISSIONS 

Section II .A.14 of Air Quality Permit 2611-03 and Exhibit A-1 of the Stipulation of June 

1998 provide for tracking flare emissions in excess of the de minimis activity level of 50 

pounds per three-hour period. Section 1 .13 of OP2611-03 and both the August 1996 and 

the June 1998 Stipulations provide exceptions for flare emissions in excess of 150 pounds 

per three-hour period associated with startups, shutdowns, and malfunctions (events 

beyond the control of the source) . In accordance with ARM 17.8.110, emissions due to 

startups/shutdowns and malfunctions must be reported to MDEQ in a timely fashion . These 

excepted emissions result from the bypassing of the sulfur recovery unit (SRU) acid gas 

feed to the flares. In accordance with the Stipulation, the reported and tracked data do not 

include de minimis flaring activities (that is, those that result in ernissions from the flare of 

less than 50 pounds per three-hour period) . Table 16 shows that during the third . quarter 

there was one reportable and no trackable flaring events logged. 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Third Quarter 2006 

Emissions Emission 

Date Hours Ibs SOZ Point Cause Corrective Action 

Reportable Events 

Startup/Shutdown/Malfunctions 

_Ernigs+ ns Exceed 150 Pounds per 3-hour Period 

9/1612006 9-11 " 7,413 100-meter Sudden & unexpected utility Corrective actions taken 

12-'14 3,199 flare electric power failure & included, as appropriate: 

ensuing malfunctions within communications with 

/ the facility including blown ExconMobil operations, 

fuse, electrical fire, short emergency startup of refinery 

circuit & tripped breaker. The backup unit, calling out 

plant emergency generator additional MSCC staff, 

started automati Ily, but the troubleshooting of the power 

tripped breake prevented the loss, reroutjpg power, use of 

emergency power from emergency power system, 

reaching critical plant calling out utility assistance, 

equipment. The lack of both calling in contractor for 

emergency power & utility emergency repairs to the 

power to the auxiliary steam power system, limited flaring 

boiler & the boiler feed water only as necessary, repair of 

pumps ultimately required that damaged systems, and 

the sulfur recovery boiler be communications with 

shut down thus necessitating ExxonMobil management 

the flaring of the acid gas that and NorthWestern Energy 

had entered the facility before utility management to 

_ ExxonMobil could reduce feed discuss how to best 

. rate and start up their backup prevent/manage any 

unit. recurrence. 

Trackabie Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

NIA 0 0 NIA N/A N/A ---- I 

AQP 2611-0311.A.14 

47 
09~10/07 MON 10 :57 FAX 406 247 4456 . MT FCSS Z006 

4.0 FLARE EMISSIONS 

Section II .A.14 of Air Quality Permit 2611-03 and Exhibit A-1 of the Stipulation of June 

1998 provide for tracking-flare ernissions in excess-of-the-de 

pounds per three-hour period. Section 1 .13 of OP2611-03.and both the August 1996 and 

the June 1998 Stipulations provide exceptions for flare emissions in excess of 150 pounds 

per three-hour period associated with startups, shutdowns, and malfunctions (events 

beyond the control of the source). In accordance with ARM 17.8.110, emissions due to 

startups/shutdowns and malfunctions must be reported to MDEQ in a timely fashion . 

These excepted emissions result from the bypassing of the sulfur recovery unit (SRU) acid 

gas feed to the flares . In accordance with the Stipulation, the reported and tracked data do 

not include de minimis flaring activities (that is, those that result in emissions from the flare 

of less than 50 pounds per three-hour period) . 

Table 16 shows that during the second quarter there were no reportable and no trackabie 

flaring events logged . 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Second Quarter 2006 , 

Emissions. Emission 

Date Hours Ibs SW Point 

~ 

Cause Corrective Action 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

NIA 0 0 NIA N/A NIA 

Trackabie Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

NIA 0 0 N/A N/A NIA 

AQP 2611-03![.A .14 

47 
09/10/07 MON 1.0 :58 FAX 406 247 4456 MT FCSS CM 007 

4.0 FLARE EMISSIONS 

Section II .A.14 of Air Quality Permit 2611-03 and Exhibit A-1 of the Stipulation of June 

1998 provide for tracking flare emissions in excess of the de minimis activity level of 50 

pounds per three-hour period . Section 1 .13 of OP2611-03 and both the August 1996 and 

the June 1998 Stipulations provide exceptions for flare emissions in excess of 150 pounds 

per three-hour period associated with startups, shutdowns, and malfunctions (events 

beyond the control of the source). In accordance with ARM 17.8 .110, emissions due to 

startups/shutdowns and malfunctions must be reported to MDEQ in a timely fashion. 

These excepted emissions result from the bypassing of the sulfur recovery unit (SRU) acid 

gas feed to the flares . In accordance with the Stipulation, the reported and tracked data do 

not include de minimis flaring activities (that is, those that result in emissions from the flare 

of less than 50 pounds per three-hour period) . 

Table 16 shows that during the first quarter there were no reportable and no trackable 

flaring events logged . 

Table 16 

Montana Sulphur & Chemical Company CEMS . 

Flaring Emissions Summary 

First Quarter 2005 

Emissions Emission 

Date Hours Ibs SO2 Point Cause Corrective Action 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

NIA 0 0 N/A NIA NIA 

Trackable Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

NIA 0 0 NIA NIA NIA 

AQP 2611-0311.A.14 
09/10/07 MON 10 :59 FAX 406 247 4456 MT FCSS U 008 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Fourth Quarter 2005 

Emissions Emission 

Date Hours !bs SOZ Point Cause L Corrective Action 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

101512005 0-2 11,645 100-m flare Simultaneous Corrective actions taken included 

power failure of notifying the refinery before, 

101512005 3-5 12,421 100-m flare grid power and during, and after the flaring 

emergency event. Both a vendor technician 

backup generator. and a vendor specialist were 

The flared refinery called in to troubleshoot the 

acid gas stream backup generator. Additional 

was estimated to MSCC personnel were called in 

contain to assist with an orderly restart, 

approximately clearing of frozen lines, and 

98.1% H2S . restoration of operations. Flaring 

was used as a last resort to 

protect the process equipment 

and control opaci ty emissions . 

10/1312005 12-14 1,309 100-m flare Emergency The maintenance was scheduled 

backup generator during a time of low refinery feed 

10/1312005 15-17 2,365 100-m flare failure during gas flows. The emergency 

planned electrical generator was tested 

maintenance by satisfactorily prior to cutting grid 

local transmission power to the facility. Corrective 

utility. The flared actions included notifying the 

mixed refinery and refinery before, during, and after 

amine unit acid the flaring event. Additional 

gas stream was MSCC personnel were called in 

estimated to to assist . A vendor specialist was 

contain called in to troubleshoot the 

approximately backup generator. Cooling 

88.1 % HZS . system and auto-start 

adjustments have been made to 

the emergency generator to 

reduce the likelihood of a similar 

system failure . Flaring at the 

100-meter flare was used as a 

last resort to protect the process 

equipment, to control opacity 

emissions, and to minimize 

ambient im pact. 

AQP 2611-0311 .A.14 
09/10/07 MON 11 :01 FAX 406 247 4456 

Date 

8/1512005 

8115/2005 

9/1912005 

9/2112005 

MT FCSS 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Third Quarter 2005 

Hours 

12-14 

15-17 

18-20 

Emissions Emission 

(Ibs SOZ~ Point Cause Corrective Action 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

1,680 

9,519 

59 

Trackable Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

15-17 

0-2 

110 

106 

100-m 

flare 

"i u t3=r 11 -- I 

flare 

100-m 

flare 

Excessive liquids in 

the feed gas supplied 

by refinery which 

overfilled the liquid 

knockout vessel and 

led to malfunctions in 

downstream 

equipment. 

t~~W S. b w~ . .. 

hydrocarbons and 

highly variable flow 

rates led to brief 

period of inadequate 

process air at the 

SRU. 

Excessive 

hydrocarbons and 

highly variable flow 

rates led to brief 

period of inadequate 

process air at the 

SRU . 

9009 

Corrective actions 

taken included notifying 

the refinery, returning 

some liquids to the 

refinery, and adding air 

to the SRU to the 

extent practical. 

Flaring was used as a 

last resort to protect the 

process equipment and 

to control opacity 

emissions. 

Ca~cti~~a~ ro~tstaken included adding 

air to the SRU to the 

extent practical and a 

brief period of flaring to 

prevent damage to the 

SRU equipment and to 

control opacity while 

the process was 

brought into control . 

Corrective actions 

taken included adding 

air to the SRU to the 

extent practical and a 

brief period of flaring to 

prevent damage to the 

SRU equipment and to 

control opacity while 

the process was 

brought into control . 

49 
09/10/07 MON 11 :02 FAX 406 247 4456 MT FCSS 10010 

V 

Date 

412112005 

612012005 

6/14/2005 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

Second Quarter 2005 

Hours 

Emissions 

((bs S02} 

Emission 

Point Cause Corrective Action 

15-17 

15-17 

Reportable Events 

Startup/Shutdown/Malfunctions 

Emissions Exceed 150 Pounds per 3-hour Period 

522 

816 

Trackable Events 

Startup/Shutdown/Malfunctions 

Emissions Between 50 and 150 Pounds per 3-hour Period 

12-14 115 

100-m 

flare 

100-m 

flare 

100-m 

flare 

Sudden and 

unexpected changes 

in feed gas supplied 

by refinery. These 

gases contained an 

exceptionally high 

concentration of 

hydrocarbons which 

caused an inadequate 

process air situation in 

the SRU. 

Power malfunction 

within MSCC 

necessitated a wiring 

bypass that caused 

the SuperCIausTM to 

shut down, which in 

turn caused an 

inadequate. process 

air situation at the 

SRU. 

Power malfunction 

within MSCC caused 

SuperClaus''"' to shut 

down while running at 

a high rate, which 

caused a shortage of 

process air to the 

remainder of the sulfur 

recovery train. 

Corrective actions 

taken included, as 

appropriate: adding air 

to the SRU to the 

extent practical, 

manual flow 

restrictions, requests to 

the refinery to 

normalize the feed 

stream . 

Corrective actions ' 

taken included adding 

air to the SRU to the 

extent practicable. 

Corrective actions 

taken included adding 

air to the SRU to the 

extent practical. 
09/10/07 MON 11 :03 FAX 406 247 4456 MT FCSS 

CL 4.0 FLARE EMISSIONS 

U011 

Exhibit A-'1 of the Stipulation of June 1998 provides for tracking flare emissions in excess 

of the de minimis activity level of 50 pounds per three-hour period . Section 1 .13 of 

OP2fi11-02 and both the August 1996 and the June 1998 Stipulations provide exceptions 

for flare emissions in excess of 150 pounds per three-hour period associated with startups, 

shutdowns, and malfunctions (events beyond the control of the source). In accordance 

with ARM 17.8 .110, emissions due to startups/shutdowns and malfunctions must be 

reported to MDEQ in a timely fashion. These excepted emissions result from the 

bypassing of the sulfur recovery unit (SRU) acid gas feed to the flares. In accordance with 

the Stipulation, the reported and tracked data do not include de minimis flaring activities 

(that is, those that result in emissions from the flare of less than 50 pounds per three-hour 

period) . 

Table 16 shows that during the first quarter there were no reportable and no trackable 

flaring events logged . 

Table 16 

Montana Sulphur & Chemical Company CEMS 

Flaring Emissions Summary 

First Quarter 2005 

Emissions Emission 

Date Hours Ibs SOZ Point Cause Corrective Action 

There were no 

reportable or 

trackable 

events fogged . 

U 

a 

7 

45 
BEP. 12,-20071 1 :37PM DEQ/PCD/AWMB 

STATE OF MONTANA 

DEPARTNENT OF ENVIRONMENTAL QUALITY 

PERMiTT1NG AND COMPLIANCE DMSION 

AIR RESOURCES MANAGEMENT BUREAU 

Box 200901 

Helena, NIT 59620 

Phone (406) 444-3490 

Fax # (406) 444-1499 

DATE: /a s'~~- a47) 7 

Total Number of Pages, itcluding cover sheet. 

TO: 5 03.3) 3/a - 1~g37 

. ie~~ F ~l' ~~ ~l'~~+r~-z 

FAX NO. : -36 3 - 3 ~-- 

~ `N I~ . 

FROM: 

OxG #: 57-17-* 

COMMENTS : 

N0. 493 P . 1 

G:lamzb\supportlforms\administtativel'fsxsheetdoe 
SEP .12 .2007 1 :3$PM DEQ/PCD/AWMB 

, 

CONOCOPHI111PS 

91LWNGS REFINERY 

SULFUR DIOXIDE EMISSIONS R>rPORI' 

FOR 

MONTANA AIR OUAC.IY'Y BUREAU 

Jan-05 

N0.493 P . 2 

_---_.---------TONS of 502--.-------'-'--- 

Sulfur in Fuel 

t-i2S ppM Boiler 

Date Fuel G HouSe Fum 5 , FCC r_e Total LbA!Mbtu(l) 

Jan 1 11 .67 1 .09 0.01 0.04 

Jan 2 11 .67 1 .13 0.01 0.04 

Jan 3 11 .19 1 .15 0.01 0.03 

Jan 4 11 .62 1 .15 0.01 0.05 

Jan 5 11 .41 1 .19 0.01 0-04 

Jan 6 11 .94 1 .18 0.01 0.04 

Jan 7 13.36 1 .23 0.01 0.05 

Jan 8 13.27 1 .33 0.01 0.04 

Jan g 10.89 2 .12 0.01 0.06 

Jan 10 11 .33 0.94 0.01 0.01 

Jan 11 12.69 1 .02 0.01 0.05 

Jan 12 13.67 1 .04 0.01 0.04 

Jan 13 12.26 1 .03 0.01 0.04 

Jan 14 12.19 1 .02 0.01 0-04 

Jan 15 11 -92 1 .03 0.01 0.04 

Jan 16 11 .93 1 .01 0.01 0.04 

Jan 17 11 .66 1 .02 0.01 0.04 

Jan 18 11 .39 0.98 0.01 0.04 

Jan 19 11 .79 0.97 0-01 0-05 

Jan 20 11 .55 0.66 0.01 0-05 

Jan 21 11 .25 0.92 0.01 0.05 

Jan 22 'S 1 .26 0.92 0.01 0.06 

Jan 23 11 .03 0.87 0.01 0.06 

Jan 24 9.66 0.95 0.01 0.05 

Jan 25 10.79 0.82 0.01 0.05 

Jan 26 11 .01 0.85 0.61 0.05 

Jan 27 11 .44 0.80 0.01 0.08 

Jan 28 11,48 0.73 0.01 0.06 

Jan 29 11 .25 0.60 0.01 0.05 

Jan 30 11 .60 0_82 0.01 0.05 

Jan 31 11 .18 0.98 0.01 0.06 

0.00 1 .14 0.06 

0.00 1 .18 0.06 

0.00 1 .19 0.06 

0.00 1 .21 0.06 

0.00 1 .24 0.07 

0_00 1 .23 0.07 

0.60 1 .89 0.08 

0.00 1 .3$ 0.08 

0.00 1 .19 0_07 

0.00 0.96 0.05 

0.00 1 .08 0.06 

0.00 1 .09 0.06 

0.00 1 .08 0.06 

0.00 1-07 0.05 

0.00 1 .08 0.06 

0.00 1-06 0_06 

0.00 1 .07 0.05 

0.10 1 .13 0.05 

0,00 1 .03 0.05 

0.00 0.92 0.05 

0.00 0.95 0.05 

0_00 0.99 0.05 

0.00 0.94 0.05 

0.00 1 .01 0.05 

0.00 0.88 0.05 

0,00 0.91 0.05 

0,00 0.89 0.05 

oe 0.80 0.04 

0.00 0.86 0.05 

0.00 0.88 0.05 

0.00 1,05 0.05 

Total 30.94 0.35 1 .45 0.70 33.44 

Total (2005 year-to-c(ate) 30-94 0.35 1 .45 0.70 53.4't 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP,12.2007 1 ;3$PM DEQ/PCD/AWMB 

. 

1 

\ 

CONOCOPHII.LIPS 

BILUNGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Feb-05 

, 

e5. 

NQ, 493 P, 3 

-- - ~. ._._ ..---TONS of S02-------------.---_.-~--- 

_H_2S PPM B iler $uffirr in Fuel 

Pi u- Fuel Cas House Furnaces EC-C-) Flan Total LbIMMbtu(1) 

Feb 1 11 .15 0.96 ' 0.01 0.08 0.00 1 .05 0.05 

Feb 2 11 .11 0.90 0.01 0.09 0.00 1.00 0.05 

Feb 3 71 .40 0.91 0,01 0.10 0.00 1 .02 0.05 

Feb 4 11 .44 0.98 0.01 0.09 0.00 1 .08 0.06 

Feb 5 , 12_34 1 .09' 0,01 0.07 0.00 1 .17 0.06 

Feb 6 12.40 . 1 .15 0.01 0.08 0.00 1 .24 0.06 

Feb 7 11 .15 1.01 0.01 0.07 0_00 1,09 ,0.05 

Feb 8 11 .07 W73 0.01 0.0$ 0.00 0.79 0_04 

Feb 9 11 .13 0.94 0.01 0.05 0.00 1 .00 0_05 

Feb 10 11.03 0.60 0.01 0.06 0.00 0.67 0_03 

Feb 11 10.96 0.62 0,01 0.05 0.00 0.88 0.03 

Feb 12 10.66 0.68 0_01 0.03 0.00 0.72 0.04 

Feb 13 10-96 0.69 0.01 0.03 0.00 0.73 0_04 

Feb 14 10.72 0.70 0.01 0.03 0.00 0.74 0.04 

Feb 15 10.66 0 .72 0.01 0.03 0.00 0.76 0.04 

Feb 16 11 .10 0,70 0.01 0.03 0,00 0.74 0.04 

Feb 17 f1 .10 0.67 0.07 0.04 0.00 0.72 0.04 

Feb 18 10.94 0.67 0.01 0.04 0.00 0.72 0.04 

Feb 19 11 .01 0.70 0.01 0.04 0.00 0.75 . 0.04 

Feb 20 1 1 .46 0.66 0.01 0.04 0,00 0.71 0.04 

Feb 21 10.96 0.70 0.01 0.04 0.00 0.75 0.04 

Feb 22 9.75 0.29 0.01 0.03 0,00 0.33 0.02 

Feb 23 10.58 0.99 0.01 0.15 0.00 1 .15 0.06 

Feb 24 66.27 1 .10 0.05 0.14 0,00 1 .29 0.07 

Feb 25 11 .38 1 .22 0.01 0.13 0.00 1 .36 0.07 

Feb 26 12.14 1 .28 0.01' .0.11 0.00 1 .40 0.07 

Feb 27 11 .80 1 .37 0.01 0.10 0.00 1 .48 0_08 

Feb 28 12.46 1 .29 0.01 0.10 0.00 1,40 0_07 

Monthly Total 24.31 0.37 1 .88 0.00 26.56 

Total (year-to-cSate) 65.25 0.72 3.33 0.70 60.00 

Notes: 1. Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP. 12, 2007 1 ; 38PM DEQ/PCD/AWMB 

CONOCOPHILLIPS 

BILIJNGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Mar-05 

N0. 493 P . 4 

_._._~._.. .-----TONS of S02 

H28 PP_M Boiler Sulfur in Fuel 

Date Fuel Gas ho-use ~ F maces FCC Flare Tatat LbIMM 

Mar 1 11 .49 1 .29 0.01 0.00 0.00 1 .3a 0.07 

Mar 2 1 1 .54 1 .30 0.01 0.08 0.00 1.39 0.07 

Mar 3 11 .84 1 .27 0.01 0.08 0.00 1.36 0.07 

Mar 4 11 .77 1 .19 0.01 0.10 0.00 1 .30 0.07 

Mar 5 11 .83 1 .07 0.01 0.09 0.00 1 .17 0.07 

Mar 6 11 .91 1 .15 0.01 0.07 0.00 1 .23 0.07 

Mar 7 11.94 1,11 0.01 0.06 0.00 1 .18 0.06 

Mar 8 'I 1 .63 0.91 0.01 0.05 0.00 0.97 0.05 

Mar ,9 11 .55 0.96 0.01 0.05 0.00 1 .02 0.06 

Mar 10 11 .13 1 .02 0.01 0.04 0.00 1-07 0.06 

Mar 11 10.97 1 .14 0-01 0.02 5.14 6.31 0.06 

Mar 12 11 .20 1 .18 0.01 0.01 0.00 1 .20 0.07 

Mar 13 10.85 1 .26 0.01 0.01 0.00 1 .28 0.07 

Mar 14 10.37 1 .09 0.01 0.00 0.00 1 .10 0.06 

Mar 15 10.26 0.94 0.01 0.01 0.00 0.96 0.05 

Mar 1e 10.48 0.85 0.01 0.01 0.00 0.87 0.05 

Mar 17 10.02 1 .15 0.01 0.02 0.00 1 .18 0.08 

Mar 18 9.17 -1 .32 0.01 0.02 0.00 1 .35 0.09 

Mar 19 8.47 1.07 0.00 0.01 0.00 1 .08 0.08 

Mar 20 8.47 1 .18 0.00 0.01 0.00 1 .19 0.10 

Mar 21 8.75 0.84 0.00 0.04 0.00 0.88 0.07 

Mar 22 8.96 0.64 0.00 0.00 0.00 0.64 0.07 

Mar 23 9.69 0.76 0.00 0.01 0.00 0.77 0.10 

Mar 24 9.87 0.70 0.00 0.01 0.00 0.71 0.10 

Mar 25 9.76 0.70 0.00 0.01 0.00 0.71 0.10 

Mar 26 9.92 0.62 0.00 0.01 0.00 0.63 0.09 

Mar 27 9.67 0.21 0.00 0.01 0.00 0.22 0.04 

Mar 28 8.25 0.00 0.00 0.02 0.00 0.02 0.00 

Mar29 7.69 0.00 0.00 0.03 0.00 0.03 0.00 

Mar30 7.78 0.00 0.00 0.02 0.00~ 0.02 0,00 

Mar 31 7.68 0.00 0.00 0.03 0.00 0.03 0.00 

Total ' 26.91 0.22 1 .01 5.14 33.28 

Total (year-to-date) 82.76 0.94 4.34 5.84 93.28 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP .12 .2007 1 :39PM DEQ/PCD/RWMB 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR , 

MONTANA AIR QUALITY BUREAU 

Apr-05 

N0. 493 P. 5 

.._____.. .. . .---. ._ .__. ..,.TC7NS Of 802-------r-------~-----"- 

PPM H2S Boiler Sulfur in Fuel 

Date Fuel Gas House Fistna s FCC Flare Total Lb1MMbtu(1) 

Apr 1 7.81 0.00 0.00 0.03 - 0.00 0.03 0.00 

Apr 2 8.92 0.00 0.00 0.04 0.00 0.04 0.00 

Apr 3 10.60 0.00 0.00 0.04 0.00 0~04 0.00 

Apr 4 8.89 0.00 0.00 0.03 0.00 0.03 0.00 

Apr 5 8.52 0.00 0.00 0.02 0.00 0.02 0.00 

Apr 6 8.21 0.00 0.00 0.02 0,00 0.02 0.00 

Apr 7 , 8.46 0.00 0.00 0.02 0.00 0.02 0.00 

Apr 8 8.32 0.00 0.00 0.01 0.00 0.01 0.00 

Apr 9 8.48 0.87 0.00 0.01 0.00 0.68 0.07 

Apr 70 8.88 0.74 0.00 0.01 0.00 0.75 0.08 

Apr 11 12.90 0.74 0.01 0.01 0.00 0.76 0.08 

Apr 12 14.45 0.54 0.01 0.01 0.00 0.56 0.05 

Apf 13 12.16 0.25 0.01 0.01 0.00 0.27 0.02 

Apr 14 11 .28 0.18 0.01 0.01 0.00 0.20 0.02 

Apr 15 1 2.67 O.47 0.01 0.01 0.00 0.49 0.03 

Apr 16 12.21 0.48 0.01 0.02 0.00 0.51 0.03 

Apr,17 12.44 0.52 0.01 0.00 0.00 . 0.53 0.03 

Apr 18 . 12.37 0.55 0_01 0.01 0.00 0.57 0.03 

Apr 19 13.48 0.58 0.01 0.02 0.07 0.68 0.03 

Apr 20 . 13.48 0.54 0.01 0.02 0.00 0.57 0.03 

Apr 21 . 11 .84 i].46 0.01 0.04 0.00 0.51 0.03 

Ap7 22 12.02 . 0.46 0.01 0.04 0.00 0.51 0.03 

Apr 23 1 3.33 0.46 0.01 0.04 0.00 0.51 0.03 

Apr 24 13.68 0.40 0.02 0.06 0.00 0-48 0.02 

Apr 25 12.85 0.35 0.01 0.06 0.00~ 0.42 0.02 

Apr26 13.22 0.34 0.02 0.06 0.00 0.42 0.02 

Apr 27 12.21 0.37 0.01 0.06 0.00 0.44 0.02 

Apr 28 12.70 0.37 0.01 0.06 0.00 0.44 0.02 

Apr 29 12.35 0.34 0.01 0.12 0.00 . 0.47 0.12 

Apr 30 14.41 0.30 0.01 0.19 0.00 0.50 0.12 

Total 10.13 0.28 1 .08 0.07 11 .56 

Total (year-to-date) 92.29 1 .22 5.42 6.91 104.84 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP,12 .2007 1 ;39PM DEQ/PCD/AWMB 

coNocoPHILUPs 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

May-05 

N0. 493 P. 6 

~~.~._.....-.._.-----------TONS of 802 

H2,% PPM 90iter in Sulfur Fuel 

0ate Fuel Ca Hause Furn ces f:CC Flare Total L.b/MMbtu(1} 

May 1 17.47 0.00 0.02 0.20 

May 2 11 .88 0.00 0.01 0.26 

May 3 12.42 0.00 0.01 0.30 

May 4 13.60 0.00 0.02 0.43 

May 5 15.05 0.00 0.02 0.49 

May 6 23.52 0.01 0.03 0.55 

May 7 27.69 0.00 0.03 0.63 

May 8 31_26 0.01 0.04 0.62 

May 9 23.08 0.00 0.03 0.61 

May 10 21 .96 0.00 0.03 0.55 

May 11 22.91 ' 0.04 0.03 0.50 

May 12 24~44 0.06 0.03 0.51 

May 13 23.1 1 0.06 0.03 0.56 

May 14 25.26 0,07 0.03 0.56 

May 15 23_05 0.06 0.03 0.44 

May 16 24_80 0.07 0.03 0.48 

May 17 25_48 0.07 0.06 0.45 

May 18 21 .20 0.07 0.07 0.47 

May 19 25.40 0.08 0.09 0.43 

May 20 24.29 0.06 0.05 0.44 

May 21 21 .48 0.07 0.02 0.45 

May 22 19.00 0.13 0.02 0.38 

May 23 19.86 0.72 0.02 0.38 

May 24 22.11 0.01 0.02 0.41 

May 25 21 .32 0.00 0.02 0.48 

May 26 21 .0$ , 0,00 0.02 , 0.53 

May 27 21 .85 0.00 0.02 0.56 

May 28 23.71 0.01 0.03 0.57 

May 29 23.75 0_00 0.03 0.57 

May 30 20.79 0.00 0.02 0.63 

May 31 19.40 0.01 0.02 0.57 

0.00 0.22 ' 0.07 

0.00 0.27 0.00 

0.00 0.31 0.00 

0.00 0.45 0.00 

0.00 0.51 0.00 

0.00 0.59 0.00 

0.00 0.6s 0.00 

0.00 0.67 0.00 

0.00 0.64 0.00 

0.00 0.58 0.00 

0.00 0.57 0.00 

0.00 0.60 0.01 

0.00 0.65 0.01 

0,00 0.66 0.01 

10.00 0.53 0.01 

0.00 0.56 0.01 

0.00 0.58 0.01 

0.00 0.61 ' 0,01 

0.00 0.60 0.01 

0.00 0.55 0.01 

0.00 0.54 0.01 

0.00 0.53 0.01 

0.00 0.52 0.01 

0.00 0.44 0.00 

0.00 0.50 0.00 

0.00 0.55 0.00 

0.00 0.58 0.00 

0.00 0.61 0.00 

0.00 0.60 0.00 

0.00 0.65 0.00 

0.00 0.60 0.00 

Total 1 .06 0.92 15.04 0 .00 17.02 

Toterl (year-to-date) 93.35 2.14 20.46 5.91 121 .$6 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP,12.20p7 1 :39PM ~~DEQ/PCD/AWMB 

CQNOCOPHtLLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY SUREAU 

Jun-05 

- ------rONS af 502--- 

N0, 493 P . 7 

H2S PPM Boil Par Sulfur in Fuel 

Date Fuel G_as House Furnaces FCC Flare Total LbIMMbtu(11 

Jun 1 19.65 0.00 0.02 0.46 0,00 0.48 0.00 

Jun 2 20.50 0.00 0.02 0.54 0.00 0.56 0.00 

Jun 3 19.14 0.01 0,02 0.50 0.00 0.53 0.00 

Jun 4 1 6.89 0.01 0.02 0.47 0.00 0.50 0.00 

Jun 5 16.63 0.01 0.02 0_45 0.00 0.48 0.00 

Jon 6 16_10 0.01 0.02 0,41 0.00 0.44 0.00 

Jun 7 " 17.57 . 0.01 0.02 0.44 0.00 0.47 0.00 

Jun & 16.06 0.01 0.02 0.41 0.00 0.44 0.100 

Jun!) 15.45 0.01 0.02 0.42 0.00 0A5 0.00 

Jun 10 15.20 0.01 0_02 0.48 0,00 0.51 0.00 

Jun 11 15.95 0,01 0.02 0.48 0.00 0.51 0.00 

Jun 12 15.47 0.01 0.02 0.46 0.00 0.49 0.00 

Jun 13 13.85 0,00 0.02 0.58 0.00 0_60 0.00 

Jun 14 14.02 0.00 0.02 0.54 0.00 0.56 0.00 

Jun 15 16.70 0.01 0.02 0.59 0.00 . 0.62 0,00 

Jun 16 16.39 0,01 0.02 0.45 0.00 0.48 0.00 

Jun 17 18.79 0.01 . 0.02 0_46 0.00 0.49 0.00 

Jun 18 15,76 0.00 0.02 0.35 0.00 0.37 0.00 

Jun 19 20.69 0.01 0.02 0.28 0.00 0.31 0.00 

Jun 20 20.05 0.01 0.02 0.29 0.00 0.32 0,00 

Jun 21 18,03 0.01 0.02 0.29 0.00 0.32 0.00 

Jun 22 17.71 0.01 0.02 023 0.00 0,26 0 .00 

Jun 23 16.20 0.01 0.02 0.23 0.00 0.26 0.00 

Jun 24 20.54 0.01 0.02 0.29 0.00 0.32 0.00 

Jun 25 ' 13.61 0.00 0.02 0.32 0.00 0.34 0.00 

Jun 26 19.10 0.01 0.02 0.34 0.00 0.37 0.00 

Jun 27 17.37 0.01 0.02 0.36 0.00 0.39 0.00 

Jun 28 15.32 0,QO 0.02 0.28 ' 0.00 0_30 0.00 

Jun 29 13.77 0.00 0.02 0.24 0.00 0.26 0.00 

Jun $0 14.19 0.01 0.02 025 0.00 0.28 0.00 

Total 0.22 0.61 11 .88 . 0.00 12.71 

Total (year-to-date) 93.57 2.75 32.34 5.91 134.57 

Notes; 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP.12.2007 1 :40PM DEQ/PCD/AWMB 

f 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Jul-05 

N0, 493 P, 8 

- --------TONS of S02 -~- 

H?S PPM 9oiter Sulfur in Fuel 

Datc Fuel, Gas House Fumac FCC Flare Tataf LblMM~ 

Jul 1 13.99 0.00 0.02 0.25 0.02 0.29 0.00 

Jul 2 14.59 0.01 0.02 0.20 0.00 0.23 0.00 

Jul 3 13.49 0.01 0.01 0.50 0.00 0.52 0.00 

Jul 4 14.99 0.01 0.02 0.47 0.00 0.50 0.00 

Jul 5 15.54 0.01 0.02 0.16 0.00 0.19 0.00 

Jul 6 12.35 0.01 0.01 0.17 0.00 0.19 0.00 

Jul 7 12.34 0.01 0.01 0.44 0.00 0.46 0.00 

Jul 8 11 .23 0.01 0.01 0.20 0.00 0.22 0.00 

Jul 9 11 .59 0.01 0.01 0.17 0.00 0.19 0.00 

Jul 10 10.56 0.01 0.01 0.10 0.00 0.12 0.00 

Jul 11 1i .47 0.01 0.01 0.10 0.00 0.12 0.00 

Jul 12 12.74 0.01 0.02 0.20 0.00 0.23 0.00 

Jul 13 12.07 0.01 0.01 0.16 0.00 0.18 0.00 

Jul 14 12.32 0.01 0.01 0.54 0.00 0.56 0.00 

Jul 15 13.66 0.01 0.01 0.59 0.00 0.61 0.00 

Jul 16 11 .53 0.01 0.01 0.15 0.00 0.17 0.00 

Jul 17 11 .77 0.01 0.01 0.19 0.00 0.21 0.00 

Jul 18 10.83 . 0.01 0.01 0.19 0.00 0.21 0.00 

Jul 19 8.74 0.171 0.01 0.28 0.00 0.30 0.00 

Jul 20 10,49 0.01 0.01 0.29 0.00 0.31 0.00r 

Jul 21 13.25 0.01 0.02 0.29 0.00 0.32 0.00 

Jul 22 13.23 0.01 0.02 0.15 0.00 0.18 0.00 

Jul 23 10.54 0.01 0.01 0.23 0.00 0,25 0.00 

Jul 24 10.90 0.01 0.01 . 0.14 0.00 0.16 0.00 

Jul 25 11 .59 0.01 0.01 0.10 0.00 0.12 0.00 

Jul 26 13.46 ~0 .01 0.02 0.07 0.00 0.10 0.00 

Jul 27 11 .43 0.01 0.01 0.36 0.00 0.38 0.00 

Jul 26 . 22.30 0.00 0.03 0.28 0.00 0.31 0.00 

Jul 29 13.41 0.00 0.01 0.09 ~0 .00 0.10 0.00 

Jul 30 32.51 0.02 0.04 0.08 0.00 0.14 0.00 

Jul 31 14.44 0.01 0.02 0.08 0.00 0.11 0.00 

Total 0.29 0.45 723 0.02 7.99 

Total (year-to-date) 93.86 3.20 39.57 6.93 442.56 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP.12.2007 1 :40PM DEQ/PCD/AWMB 

. 

CONOCOPHrLlupS 

BtLUNGs REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR ' 

MONTANA AIR QUALITY BUREAU 

Aug-03 

._______ .___-jONS of SC2----~-- 

N0, 493 P . g 

H2S PPM 13oiler Sulfur in Fuel 

Date Fuel Gas House Fumaces FCC Flare . Total Lb/MMbtu(11 

Aug 1 20,15 0.00 0.02 0.07 0.00 0.09 0.00 

Aug 2 18.85 0.00 0.02 0.06 0.00 0.08 0.00 

Aug 3 18.41 0.01 0.02 0.50 18.04 18.57 0.00 

Aug 4 15.19 0.00 0.02 0.47 0.87 1,30 0.00 

Aug 5 15.1 1 0.00 0.02 0.16 0.00 0A8 0.00 

Aug 6 13.25 Q.00 0.01 0.12 0.00 0.13 0.00 

Aug 7 15.84 0.00 0.02 0.44 0_00 0.46 0.00 

Aug 6 14.67 0.00 0.02 0_11 0.00 0.13 0.00 

Aug 9 11 .51 0.00 0.01 0.10 0.00 0.1,1 0.00 

Aug 10 12.70 0.00 0.01 0.09 0.00 0.10 0.00 

Aug 11 12.64 0.00 0.01 0.09 0.00 0.10 0.00 

Aug 12 12.32 0.00 0.01 0.09 0.00 0.10 0.00 

Aug 13 10.87 0.00 0.01 0.07 0.00 0.08 0.00 

AU9 14 11 .77 0.00 0.01 0.54 0.00 0.55 0.00 

Aug 15 13.17 0_00 0.01 0.59 0.00 0.60 0.00 

Aug 16 12.99 0.00 0.01 . 0.05 0.00 0.06 0.00 

Aug 17 13.37 0.00 0.01 0.05 0.00 0.06 0.00 

Aug 18 13,50 0.00 0.02 0.06 0.00 0.08 0.00 

Aug 19 15,03 0.00 0.02 0.28 0.00 0.30 0.00 

Aug 20 14,45 0.00 0.02 0.29 0.00 0.31 0.00 

Aug 21 16.1 3 0.00 . 0.02 0.29 0.00 0.31 0.00 

Aug 22 15.36 0.00 0.02 0.04 0,00 ' 0.06 0,00 

Aug 23 14.33 0.00 0.02 0.23 0.00 0 .25 0_00 

Aug 24 13.56 0.00 0.01 0.04 0:00 0.05 0.00 

Aug 25 15.71 0.00 0.02 0.06 0.00 0.06 0.00 

Aug 26 19.03 0.01 0.02 0.05 0,00 0.08 0.00 

Aug 27 18.57 0.00 0.02 0,36 0.00 0,38 0.00 

Aug 28 19.27 0.00 0.02 0.23 0.00 0.30 0.00 

Aug 29 17.74 0_00 0.02 0.06 0.00 0.08 0.00 

Aug 30 14.06 0.00 0.01 0.05 0.00 0.06 0.00 

Aug 31 14.90 0.00 0.02 0.05 0,00 0.07 0,00 

'Total 0-02 0.50 5.74 18.85 25_11 

Total (year-to-date) '93.88 3.70 45.31 24.78 167.87 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
~SEP. 12 . 2007- 1 :41 PM DEQ/PCD/A'NMB 

. 

cONOCOpHILLIPs 

BILLINGS REFINERY 

SULFUR RiOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Sep~06 

---------------TQNS of S02 --- 

N0. 493 P . 10 

. H2.5 PPM Boiler Sulfur in Fuel 

Date Fuel Gas House Fumaces FCC ROM Total LbIMMbtu(1) 

Sep 1 13.71 0.07 0.01 0.05 0.00 0.13 0.00 

Sep 2 15.87 0.08 0.02 0.06 0.00 0.16 0.01 

Sep 3 17.91 0.09 0.02 0.08 0,00 0.19 0.01 

Sep 4 14.17 0.09 0.02 0.10 0.00 0,21 ' 0.01 

Sep 6 15.88 0.08 0.02 0.10 O,a0 020 0.01 

Sep 6 14,30 0.09 0.02 0.08 0.00 0.19 0.01 

Sep 7 13.34 0.10 0.01 0.10 0.00 021 0.01 

Sep 8 14.71 0.10' 0.02 0.08 0.00 0.20 0.01 

Sep 9 14.20 0.10 0.02 0.08 0.00 0.20 0.01 

Sep 10 13,72 0,10 0.02 0.07 0.00 0.19 0.01 

Sep 11 12.82 0.09 0.01 0.07 0.00 0.17 0

., 

01 

Sep 12 15.59 0,09 0.02 0.08 0.00 0.19 0.01 

Sep 13 12.71 0,08 0.01 0.09 0.00 0.18 . 0.01 

Sep 14 13.11 0.09 0.01 0.07 0.00 D.17 0.01 

Sep 15 13.81 0.09 0.01 0.07 0.00 0.17 0.01 

Sep 16 13.29 0.09 0.01 0.07 0.00 0.17 0.01 

Sep 17 13.36 0.09 . 0.01 0.06 0.00 0.16 0.01 

Sep 18 12.58 0,08 0.01 0.06 0.00 0.15 0.01 

Sep 19 12.60 0.08 0.01 0.05 0.00 0.14 0.01 

Sep 20 12.69 0.09 0.01 0.06 0.00 0.16 0.01 

Sep 21 21 .98 0.08 0.02 0.06 0.00 0.16 0.01 

Sep 22 22.51 0.09 0.02 0.07 0.00 0.18 0.01 

sep 23 21 .02 0 .09 0 .02 0,07 0.00 0 .18 0.01 

Sep 24 22_02 0.09 0.02 . 0.06 0.00 0.17 0.01 

Sep 25 22.26 0.08 0.02 0.07 0.00 0.17 0.01 

Sep 26 17.80 0.08 0.02 0.07 0.00 0.17 0.01 

Sep 27 21 .39 0.08 0.02 0.07 0.00 0_17 0,01 

Sep 28 20.93 0.08 0.02 0.06 0.00 0.16 0.01 

Sep 29 19.72 0.09 0.02 0.08 0.00 0.19 0.01 

Sep 30 19.20 0.09 0.02 0.08 0.00 0.19 0.101 

Total - 2.62 0.49 2.17 0.00 5.28 

Total (year-to-date) 96.50 4.1'9 47.48 24.78 172.95 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP .12 .2007 1 :41PM DEQ/PCD/RWMB 

CONOCOPHILl.IP3 

SIILLJNGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Oct-05 

N0. 493 P. 11 

-- --------~----_--------TONS of S02- -- -------- .---~-- 

H23 H2S PP Soiler Sulfur in Fuel 

Date Fuel Gas HouSe Fumaces FCC Flare Total LbIMMbfu(1) 

Oat 1 14.24 0.09 0.01 0.08 0.00 0.18, 0.01 

Oct 2 13.41 0.09 0_01 0,06 0.00 0.16 0.01 

Oct 3 11 .89 0.67 0.01 0.04 0.00 0.72 0.04 

Oct4 17.93 1 .17 0.02 0,03 0.00 1 .22 0.47 

Oct 5 14.27 0.99 0.01 0.03 0.00 1 .03 0.06 

Oct 6 11 .91 1 .06 0.01 0.04 0.00 1 .11 . 0.06 

Oct 7 14.09 1 .00 0.01 0.05 0.00 1 .06 0.06 

Oct S 12.40 0.93 0.01 0.05 0.00 0.99 0.05 

Oct 9 13.79 0.83 0.01 0.06 0.00 0.90 0.05 

Oct 10 12.72 0.56 0.01 0.07 0.00 0,64 0.04 

Oct 11 14.52 0.32 0.01 0.08 0.00 0.41 0,02 

Oct 12 17.23 0.32 0.01 0.06 0.00 0.39 0.02 

Oct 13 14.24 0.01 0.01 0.04 0.00 0.05 0,00 

Oct 14 13.97 0.01 0.01 0.03 0.00 0.05 0.00 

Oct 1S 15.03 0.01 0.0~1 0.05 0.00 0.07 0.00 

Oct 16 15.46 0.01 0.01 0,08 0.00 0.10 0.00 

Oct 17 19.90 0.02 0.02 0.06 0,00 0.10 0.00 

00 18 15.72 0.02 0.01 0.07 0.00 0.10 0.00 

Oct 19 21,79 0.02 0.02 0.07 0.00 0.11 0.00 

0oC20 13.56 0.02 0.01 0.05 0.00 0.08 0_00 

Oct 21 13.90 0.01 0.01 0.06 0.00 0.08 0.00 

Oct 22 12,05 0.01 0.01 0.06 0.00 0.08 0.00 

Oct 23 32.21 0.01 0.0, 0.06 0.00 0.08 0.00 

Oct 24 12.54 0.01 041 0.06 0.00 0.08 0.00 

Oct 26 12.37 0.02 0.01 0.07 0.00 0.10 0.00 

Oct 26 13.85 0.01 0.02 0.07 0.00 0.10 0.00 

Oct 27 12.72 0.01 0.01 0.06 0.00 0.08 0.00 

Oct 28 12.96 0.01 0.01 0.05 0.00 0.07 0.00 

Oct 2S 11 .40 0.03 0.01 0.03 0.00 0,07 0.00 

Oct 30 10.28 0.05 0.01 0.06 0.00 0,12 0.00 

Oct 31 14.61 0.04 0.02 0.06 0.00 0.12 0.00 

Total 8.34 0.40 1 .74 0.00 10.48 

Total (year-to-date) 104.84 4.59 49.22 24.78 183.43 

Nates: 1 . Sulfur in gas and o1 fuels per MMbtu's HHV. 
SEP.12.2007 1 :41PM DEQ/PCD/AWMB 

CONOCOPHII.LIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

IVav"05 

N0. 493 P . 12 

---~-~---~-_.--. .-'fONS of SO2------~-r----~---------- - 

FIZS PPM Sailer Sulfur _in Fuel 

Date Fuel_Gas House Fuac@s FCC Flare Total LbIM__ Mb 

~ 

tu(11 

Nov 1 10,93 0.01 0.01 0.06 0.00 0,08 0.00 

Nov 2 10.77 0.01 0_01 0.05 0.00 0.07 0.00 

Nov 3 1 0.82 0.01 0.01 0.07 0.00 0,09 0.00. 

Nov 4 9.97 0.06 0.01 0.06 0.00 0.13 0.00 

Nov 5 11 .92 0.61 0.01 0.05 0.00 0.67 0.04 

Nov 6 11 .86 1 .02 0.01 0.06 0.00 1 .09 0.06 

Nov 7 9.57 1 .16 0.01 0.06 0.00 1 .23 0.07 

Nov 8 8.29 1 .39 0.01 0.03 0.00 1 .43 0.08 

Nov 9 . 7.40 1 .14 0.01 0.05 0,00 1.20 0.07 

Nov 10 12.95 0.93 0.01 0.05 0.00 0.99 0.06 

Nov 11 9.11 1 .07 0.01 0.04 0.00 1 .12 0.06 

Nov 12 9.09 0.94 0.01 0.04 0.00 0.99 0.05 

Nov 13 10.24 0.67 0.01 0.04 0.00 0.72 0.04 

Nov 14 8.68 0.76 0.01 0.06 0.00 0.133~ 0.04 

Nov 15 9.76 0.86 0.01 0.06 0.00 0.93 0_05 

Nov 16 12.00 1 .02 0.01 0.06 0.00 1 .09 0.06 

Nov 17 10.04 0.88 0.01 0.08 0.00 0.97 0.05 

Nov 18 12.05 1 .21 0.01 0.09 0.00 1.31 0.07 

Nov 19 10-10 1 .16 0.01 0.09 0.00 1 .26 0.06 

Nov 20 15.78 1 .00 0.02 0.08 0.00 1 .10 0.06 

Nov 21 10.36 0.41 0.01 0.10 0.08 0.60 0.02 

Nov 22 10.63 0.45 0.01 0.10 0.06 0.62 0.03 

Nov 23 10.58 0_52 0.01 0.10 0.06 0.69 0.03 

Nov 24 9.73 0.63 0.01 0.08 0.06 0.68 0,03 

Nov 25 9.83 0.52 0.01 0.08 0.04 0.65 0.03 

Nov 26 9.29 0.83 0.01 0.07 0.17 1 .08 0.05 

Nov 27 9.11 1 .00 0.01 0.08 0.03 1 .12 0.05 

Nov 28 9.27 1 .00 0.01 0.08 0.02 1 .11 0.06 

Nov 29 9.10 0.95 0_01 0.08 0.13 1 .17 0,05 

Nov 30 9.26 0_91 0.01 0.07 0.00 0.99 0.05 

Total 23.02 0.32 2.01 0.67 26.02 

Total (year-to-date) 127.86 4.91 51 .23 25.45 209.45 

Notes: 1 . Sulfur in gas and nil fuels per MMbtu's HHV. 
SEP .12 .2007 1 :42PM DEQ/PCD/AWMB N0.493 P. 13 

. 

CONOCOPHILLIPS 

BILLINGS REFINERY 

-SULFUR DIOICIDE EMISSIONS REPORT 

' ~ FOR 

MONTANA AIR QUALITY BUREAU 

Dec-05 

----.--.~- .----TONS of SC?2- -

H2S PPM Boiler Sulfur in Fuel 

Date Fuel Gas Fiouse Furnaces FCC Fl are Total LbIMMbtum 

Dee 1 9.37 0.91 0.01 0.07 0.00 0.99 0.05 

Dec 2 8.80 0.94 0.01 0.05 0.00 1 .00 0.05 

Dec 3 9.43 1.13 0.01 0.07 0.00 1 .21 0.07 

Dec 4 9.15 1.09 0.01 0.08 0.00 1 .18 0.06 

000 5 9.63 1 .01 0.01 0.08 0.00 1 .10 0.04 

Dec 6 9.06 1.07 0.01 0-06 0.00 1 .14 0.05 

Dec 7 8.94 1 .18 0.01 0.08 0.39 1 .66 0.07 

Dec 8 8.58 1.11 0.01 0.07 0.00 1 .19 0.07 

Dec 9 7.44 0.91 0.01 0.03 0.00 0.95 0.06 

Dec 10 6.27 1,36 0.01 0.04 0.00 1A1 0.07 

Dec 11 13.01 1 .38 0,01 0.13 0.00 1 .52 0.07 

Dec 12 6.58 1 .42 0.01 0.02 0.00 1 .45 0.08 

Dec 13 7.05 1 .29 0.01 0.06 0.00 1 .36 0.07 

Dec 14 8.35 1 .16 0.01 0.07 0.00 1 .24 0.06 

Dec 15 9.49 1.14 0.01 0.06 0.00 1 .21 0.06 

Dec 16 9.42 1 .09 0.01 0.06 0.00 1 .16 0.06 

Dec 17 9.22 1.07 0.01 0.07 0.00 1 .15 0.06 

Dec 18 9.48 1 .19 0.01 0.07 0.00 1 .27 0.07 

Dec 19 8.74 1 .15 0.01 0.04 0.00 1 .20 0.06 

Dec 20 9.14 1,20 0.01 0.02 0.00 1 .23 .0 .07 

Dec 21 9.46 1 .08 0.01 0.03 0.00 1 .12 0.06 

Dec 22 ' 9.43 0.77 0.01 0.05 0.00 0.83 0.04 

DeC 23 9.68 0.82 0.01 0.08 0.00 0_91 0.05 

Dec 24 18.02 0.80 0.02 _ 0.10 0.00 0.92 0.05 

Dec 25 10.45 0.80 0.01 0.09 0.00 0.90 0.04 

Dec 26 11 .06 0.80 0.01 0.08 0.06 0.95 0.04 

Dec 27 12.33 0.84 0.01 0.07 0.14 1 .06 0.05 

Deo 28 27.75 0,73 0 .03 0.09 0.0.5 0.90 0 .04 

Dec 29 13.17 1 .46 0.01 0.10. 0.03 1 .60 0.03 

Dec 30 15.21 1 .40 0.02 0.11 0.01 1-54 0.02 

Dec 31 10.58 0.38 0.01 0.10 0.13 0.62 0.02 

TOW 30.67 0.35 2.15 0.81 33.98 

Total (year-to-date) 158.53 5.26 53.38 26.26 243.43 

Notes: ~ 1 . Sulfur in gas and 61 fuels per MMbtu's Hh1V. 
SEP, 12. 2007 1 :42PM DEQ~/P~CD/AWMB q o N0. 493 P . 14 

CONOCt]PHILtiis"S 

BILLINGS REFINERY 

SULFUR DYOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Jan-06 

-TONS of 802 --~--------^-~- 

H23 PM Boiler Sulfur in Fuel 

Date Fuel Gas House Furnaces FCC Flare Total LbIMMbtu(1) 

Jan 1 10.02 0.42 0.01 0.0s 

Jan 2 . 10.24 0.42 0.01 0.09 

Jan 3 20.48 0.53 0.02 0.06 

Jan 4 8.93 0.60 0.01 0.03 

Jan 5 'C 8.37 0.97 0.02 0.03 

Jan 6 9.83 . 0.92 0.01 0.03 

Jan 7 9.66 0.94 0.01 0.03 

Jan 8 9.49 0.88 0.01 0.03 

Jan 9 9.30 0.96 ' 0.01 0.04 

Jan 10 9.46 1 .13 0.01 0.04 

Jan 11 9.46 0.34 0.01 0.03 

Jan 12 8.53 0.33 0.01 0.03 

Jarr 13 9.77 0.91 0.01 0.03 

Jan 'i4 9.67 0.90 0.01 0.03 

Jan 15 9.28 0.94 0.01 0.02 

Jan 16 9.20 0.95 0.01 0.03 

Jan 17 9.36 0.95 0.01 0.03 

Jan 18 9.86 0.85 0.01 0.03 

Jan 19 9.35 0.80 0.01 0.03 

Jan 20 9.41 0.81 0.01 - 0.03 

Jan 21 9.43 0.87 0.01 0.03 

Jan 22 9.54 0.88 0.01 0.03 

Jan 23 15.18 0.97 0.02 0.02 

Jan 24 10.13 0.91 0.91 0.02 

Jan 25 9.94 0.86 0.01 0.03 

Jan 26 9.84 0.95 0.01 0.02 

Jan 27 9.10 0.92 0.01 0.02 

Jan 28 9.51 0.89 0.01 0.01 

Jan 29 9.22 1,13 0.01 0.01 

Jan 30 9.33 1 .05 0.01 0.01 

Jan 31 9.62 1 .02 0.01 0.01 

Total 25.96 0.34 0.99 

Total (2006 year-to-date) 25.96 0.34 0.99 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 

0.00 0.51 0.02 

0.00 0.52 0.02 

0.04 0.65 0.03 

3.05 3.69 0.04 

1 .22 224 0.05 

0.00 0.96 0.05 

0.00 0.98 0 .05 

0_00 0.92 0.05 

0.00 1 .01 0.07 

0.00 1 .18 0.02 

0.00 0.38 0.02 

0.00 0.37 0.05 

0.00 0.95 0.05 

0.00 0.94 0.05 

0.00 0.97 0.05 

0.00 0.99 0.05 

0.00 .0.99 0.05 

0.29 1 .18 0.05 

0.11 0.95 0.04 

0.08 0.93 0.04 

0.00 0.91 0.05 

0.00 0.90 0.05 

0.00 1 .01 0.05 

0.00 0.94 0.05 

0.46 1 .36 0.05 

0.00 0.98 0.05 

0.00 0.95 0.05 

0.00 0.91 0.05 

0.00 1 .15 0.06 

0.00 1 .07 0.06 

0.00 1.04 0_06 

5.25 $2.54 

5.25 32_54 
SEP, 12, 2007 1 :43PM DEQ/PCD/AWMB N0, 493 P, 15 

coNOCOPHrLUPs 

BILLINGS REFINERY 

SULFUR b107CIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Feb-06 

-- -- ---TONS of S02--- 

H2S PPM ROE Sulfur in Fuel 

D2 e Fuel Gaslio.1jse Furnaces, FCC Flare Total Lb/MMbt4(l) 

Feb 1 9.07 0.78 0.01 0.02 

Feb 2 9.72 0.87 0.01 0.03 

Feb 3 9:37 0.78 0.01 0.03 

Feb 4 . 9.76 0.97 0.01 0.03 

Feb 5 9.58 0,79 . 0.01 0.03 

Feb 6 9.40 0.82 0.01 0.04 

Feb 7 9.98 0.79 0.01 0.04 

Feb 8 9.15 0.83 0.01 0.03 

Feb 9 9.29 0.77 0.01 0.03 

Feb 10 9.16 0.79 0.01 0.03 

Feb 11 8.71 0.78 0.01 0.04 

Feb 12 9.15 0.75 0.01 0.04 

Feb 13 . 8.94 0.74 0.01 0.04 

Feb 14 11 .62 . 0.72 0.0'1 0,04 

Feb 15 9.06 0.66 0.01 0.04 

Feb 16 8.94 0.74 0.01 0.04 

Feb 17 8.92 0.85 0,01 0.03 

Feb 18 9.0'1 0.45 0.01 0.03 

Feb 19 10.92 0.34 0.01 0.04 

Feb 20 10s3 0.75 0,01 0.05 

Feb 21 18.55 0.77 0 .02 0.04 

Feb 22 13.20 0.73 0.01 0.03 

Feb 23 9.87 0.78 0.01 0.04 

Feb 24 9.80 0.78 0.01 0.03 

Feb 25 9.21 0.71 0.01 . ' 0.04 

Feb 26 9.71 0.68 0.01 0.05 

Feb 27 9.62 0.93 0.01 0.05 

Feb 28 9.38 0,86 0.0'1 0.04 

0.00 0,81 0.04 

0.00 0.91 0.05 

0.00 0.82 0.04 

0.00 1 .01 0.05 

0.00 0.83 0,04 

0.00 0.87 . 0.04 

125 2.09 0.04 

1 .25 2.12 0,05 

0.00 0.81 0.04 

0.00 0.83 0.04 

0.00 0.83 0.04 

0.00 0.80 0.04 

0.00 0.79 0.04 

0.00 0,77 0,04 

0.15 0.86 0.03 

0.30 1 .09 0.04 

1 .05 1 .94 0.04 

1 .00 1 .49 0_03 

0.00 0.39 0.02 

1 .00 1 .81 0.04 

0.00 0.83 0,04 

0.50 127 0.04 

0.00 0.83 0.04 

0.00 0.82 0.04 

0.00 0.76 0.04 

0.00 6.74 0.04 

1 _'00 1 .99 0.05 

0.00 0.93 0.05 

Monthly Total 21 .20 0_31 1,00 7.50 30,01 

Total (year-to-date) 47.'{6 0.66 1,99 12.75 62.55 

Notes: 1_ Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP, 12 . 2007 1 :43PM DEQy/~P'CD/AWMB -~, N0, 493 P, 16 

cONOCOpHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Mar-06 

-~---------TONS of S02-------~-----~-------~-- 

H2S PPM Boiler Sulfur in Fuel 

Date Fuel Gas House Furnaces FCC Flare Total LYyIMMbtu(1) 

Mar 1 10.59 0.88 0.01 0.03 0.00 0.92 0.05 

Mar 2 12.32 0.81 0.01 0.03 0.00 0.85 0.04 

Mar 3 12.78 0.82 0.02 0.03 0.00 0.87 0.04 

Mar 4 12.68 0.82 0.02 0.04 0.00 0.88 0.04 

Mar 5 10.25 0.70 0.01 0.05 0.00 0.76 0.04 

Mar 6 14.69 0.66 0.02 0.05 0.00 0.73 0.03 

Mar 7 13.37 0.69 0.02 0.0$ 0.00 0.77 0.04 

Mar 8 13.12 0.49 0.02 0.06 0.00 _ 0.57 0.02 

Mar 9 12.30 0.48 0.02 0.06 0.00 0.56 0.02 

Mar 10 11 .44 0.43 0.01 0.06 0.00 0.50 0.02 

Mar 11 1 1 .78 0.43 0.02 0.05 0.00 0.50 0.02 

Mar 12 1127 0.43 0.01 0.05 0.00 0.49 0.02 

Mar 13 11 .17 0.42 0.01 0.06 0.00 0.49 0.02 

Mar 14 11 .19 0.46 0.01 0.06 0.00 0.53 0.02 

Mar 15 11 .06 0.47 0.01 0.04 0.00 ~ 0.52 0.02 

Mar 16 12.91 0.51 0.01 0.04 0.70 0.66 0.03 

Mar 17 11 .90 0.57 0.01 0.05 0.40 1 .03 0.04 

Mar 18 11 .13 0.57 0.01 0.03 0.70 1 .31 0.04 

Mar 19 8.31 0.74 0.00 0.02 0.00 0.76 0.06 

Mar 20 9.48 0.69 0.01 0.03 0.00 0.73 0.06 

Mar21 8.00 0.76 0.00 0.04 0.00 0.80 0.06 

Mar 22 829 0.75 0.00 0.04 0.00 0.79 0.06 

Mar 23 6.70 0.90 0.00 0.04 0.05 0.99 0.07 

Mar 24 7.10 1 .02 0.00 0.03 0.00 1.05 0.08 

Mar 25 6,13 1 .03 0.00 0.03 0.00 1.06 0.08 

Mar 26 5.55 1 ..01 0.00 0.02 0.00 1 .03 0.07 

Mar 27 5.33 1 .04 0.00 0.03 0.00 1.07 0.07 

Mar 28 8.30 0.94 0.01 0.06 0.00 1 .01 ' 0.06 

Mar 29 13.54 0.94 0.01 0.06 0.00 1 .01 0.05 

Mar 30 12.67 0.99 0.02 0.09 0.fl0 1 .10 0.05 

Mar 31 12.25 1-04 0.02 0.13 0.00 1 .19 0.05 

Total 22.49 0.35 1 .47 1.25 25.56 

Total (year-to-date) 69.65 1 .00 3.46 14.00 88,11 

Notes: 1. Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP,12.2007 1 :43PM DEQ/PCD/AWMB 

. N0, 4_93 P, 17 

JUL 3 1 Ms 

W Dept Environmental OuaGty 

CONOGCIPHILUPS Air 

Resources M nagame DBMW 

BILUNGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Apr-06 

------- TONS of 502--~----------------^rH2S PPM Boiler Sulfur in Fuel 

Date Fuel Gas Nouse Furna FGC Flare ' Total Lb/Mbtuffl 

Apf 1 '! 9.28 1 .03 0.02 0.14 0.00 1 .19 0.06 

Apr2 17.00 0.83 0,02 0.14 0_00 0.99 0.04 

Apr 3 12.66 0.83 0.02 0.16 0.00 1.01 0.04 

Apr 4 18.74 1 .10 0.02 0.15 0.00 1 .27 0.05 

Apr 5 19.56 1 .07 0.02 0.18 0,00 1 .27 0.05 

Apr 6 14.06 . 1 .01 0.02 0.24 0.00 1 .27 0.05 

Apr 7 16.68 0.57 0.02 0.24 0_00 0.83 0.03 

Apr 6 13.73 0.26 0.02 0.28 0.00 0.56 0.02 

Apr 9 29.42 0128 0,03 0.27 2.60 3.18 0.02 

Apr 10 34.57 0,25 0.04 0_15 0.00 0.44 0.02 

Apr 11 11 .62 0.19 0.01 0.16 0.00 0.36 0.01 

Apr 12 17.83 0.18 0.02 0.24 0.00 0.44 0.01 

Apr 13 11 .27 0.20 ' 0,01 0.26 0.00 , 0.47 0.01 

Apr 14 10.86 0.18 0.01 0.25 0.00 0.44 0,01 

Apr 15 12.92 0.19 0.02 0.18 0.00 0.39 0.01 

Apr 1.6 19.96 0.19 0.02 0.16 0.00 0.37 0.01 

Apr 17 13.65 0.18 0.02 0.10 0,00 0.30 0.01 

Apr 18 12.91 0.17 0.02 0.14 0.00 0.33 0.01 

Apr 19 20.33 , 0.17 0.02 0.18 0_00 0.37 0.01 

Apr 20 23.05 0.15 0.03 0.20 0.00 0.38 0.01 

Apr 21 34.02 0.13 0.04 0.17 0.00 0:34 0,01 

Apr 22 27.78 0.14 0.04 0.18 0.00 0.36 0.01 

Apr 23 1 1 .28 0.15 0.01 0.17 0.00 0.33 0.01 Apr24 11 .69 0.14 0.02 0.14 0.00 0.30 0.01 Apr 25 11 .90 0.12 '0.02 0.11 0.00 0.26 0.01 Apr 26 10.94 0.13 0.01 0.06 0.00 0.20 0.01 

Apr 27 13.09 0.18 0.02 0.05 0.00 0.25 0.01 

Apr 28 12.75 0.18 0.02 0.06 0.00 0.26 0.01 

Apr 29 11.54 0.13~ 0,01 0.04 0.00 0.18 0.01 

Apr 30 13.68 0.12 0.02 0.04 0.00 0.18 0.01 

Total 10.45 0.63 4.84 2,60 18.52 

Total (year-to-date) 80.'[0 1.63 8.30 16.60 106.63 

Notes: 1, Sulfur in gas and oil fuels per MMbtu's HHV_ 
SEP.12.2007 1 ;44PM DEQ/PCD/AWMB 

t 

CONOCOPHILlIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

May-06 

NO. 493 P . 18 

--~-TONS of 802 ~--

H2S PPM Bailer Sultfiar in Fuel 

Date el Gas Hous_e_ Furnaces FCC Flare Tatai Lb/A+IMbtu(1) 

May 1 1 1.71 0.11 0.02 0.07 0.00 " 0.20 0.01 

May 2 11 .93 0.13 0.02 0.06 0.00 0.21 0.01 

May 3 " 10.69 0.13 0.01 0.03 0.00 0.17 0.01 

May 4 10.15 0.12 0.01 0.04 0.00 0-17 0.01 

May 3 11.32 0.12 0.01 0.03 0.00 0.16 0.01 

May 6 9.96 0.11 0.01 0.04 0.00 0.16 0.01 

May 7 11 .04 0.10 0.01 0.04 0.00 0.16 0.01 

May $ 1 0.12 0.11 0.01 0.06 0.00 0.18 0.01 

May 9 10.31 010 0.01 0.06 0.G0 0.17 0.01 

May 10 10.12 0.10 0.01 0.06 0.00 0.17 0 .01 

May 11 7.93 0-12 0.01 0.07 0.00 0.20 0.01 

May 12 9.23 0.15 0.01 0.05 0.00 0.21 0.01 

May 13 8.68 0.15 0.01 0.04 0.00 0.20 0.01 

May 14 9.38 0.11 0.01 0.05 0.00 0.17 0.01 

May 15 9.40 0. "i 3 0.01 0.06 0:42 0.62 0.01 

May 16 14.36 0.11 0.02 0.06 0.00 0.19 0.01 

May 17 18.67 0.10 0.02 0.05 0.00 0.17 0.01 

May IS 5.01 0.02 0.01 0.06 0.00 0.09 0.00 

M2y 19 16.00 0.02 0.02 0.06 0.00 0.10 0.00 

May 20 9.07 0.02 0.01 0.07 0.00 0.10 0.00 

May 21 12.91 0.02 0.02 0.06 0.00 0.10 0.00 

May 22 8.56 0.02 0.01 0.08 0.00 0.11 0.00 

May 23 8.17 0.01 0.01 0.09 0.00 0.11 0.00 

May 24 8.22 0.01 0.,01 0.11 0.00 0.13 0.00 

May25 14.25 0.01 0.02 0.13 0.00 0.16 0.00 

May 26 9.14 0.01 0.01 0.15 0.00 0.17 0.00 

May 27 8.90 0.00 0.01 0.18 0.00 0.19 0 .00 

May 28 9.73 0,01 0.01 0.21 0.00 0.23 0:00 

May 29 8.e5 0.00 0.01 0.25 0.00 0.26 0.00 

May 30 8.51 0.00 0.01 0.22 0.00 0.23 0.00 

May 31 9.87 0.00 0.01 0.24 0.00 0.25 0.00 

Total 2.16 0.40 2.77 . a,a2 6.76 

Total {year-to-date} 82.26 2.03 11 .07 17.02 112.38 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP, 12 . 2007 1 :44PM DEQ/PCD/AWMB N0, 493 P, 19 

CoNOCOPHILUps 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Jun-06 

---- ---TONS of SO 

H2 FPM Bailer Sulfur in Fuel 

Date Fuel Gas House Furnaces FCC Flare Total LbIMMb (1) 

Jun 1 12.40 0.01 0.02 0.21 0.00 0.24 0100 

Jun 2 9.28 0.11 0.01 0.04 0:00 0.16 0.01 

Jun 3 9.33 0.12 0.01 0.05 0.00 0.18 0.01 

Jun 4 8_36 0.01 0.01 0.10 0.00 0.12 0.00 

Jun 5 23.87 0.01 0.03 0.11 0.0Q 0.15 0.00 

Jurk 6 8.80 0.00 0.01 0.12 0.00 0.13 0.00 

Jun 7 8 .47 0.03 0 .01 0.05 0 .00 0.09 0.00 

Jun 8 9,23 0.00 0.01 0.04 0.00 0.05 0.00 

Jun 9 8.71 0.00 0.01 ' 0.05 0.00 0.06 0.00 

Jun 10 8.91 0.00 0.01 0.08 0.00 0.09 0.00 

Jun 11 8.58 0.00 _ 0.01 0.09 0.00 0.10 0.00 

Jun 12 7.77 0,00 0.01 0.08 0,00 0.09 0.00 

Jun 13 8.45 0.00 0~.01 0.06 0.00 0.07 0.00 

Jun 14 8,43 0.00 0.01 0.06 0.00 0.07 0.00 

Jun 16 8.49 0.00 0,01 0.05 0AO 0.09 0.00 

Jun 16 8.40 0.01 0.01 0.10 0.00 0.12 0.00 

Jun 17 S_45 0.00 0.01 0.13 0.00 0.14 0.00 

Jun 18 8.60 0.00 0.01 0.14 0~00 0_75 0.00 

,Jun 19 8.97 0.00 0.01 0.16 0.00 0.17 0.00 

Jun 20 8.83 0.00 0.01 0.14 0,00 0.15 0_00 

Jun 21 8.16 0.00 0.01 0.17 0.00 0.18 0.00 

Jun 22 18.37 0.00 0.02 0.16 0.00 0.17 0,00 

Jun 23 10.42 0.00 0.01 . 0.14 0.00 0.15 0.00 

Jun 24 9.29 0.02 10 ;01 0.10 0.00 0.13 0.00 

Jun 25 9.41 0.00 0.01 0.16 0.00 0.17 0.00 

Jun 26 9.50 0.00 0.01 0.18 0.00 0.19 0.00 

Jun 27 13.79 0.00 0.02 0.17 0.00 0.19 0.00 

Jun 28 16.39 0.00 0.02 0.10 0.00 0.12 0.00 

Jun 29 9.30 0.00 0.01 0.06 0.00 0.07 0.00 

Jun 30 3.67 0.00 0.01 0,03 0.00 0.04 0.00 

Total 0.38 0.35 3.14 0.00 3.87 

Total (year-to-date) 82.64 2.38 14.21 17.02 116.25 

Notes: 1. Su(fur in gas and ail ftiels per MMbtu's Hi-1V. 
SEP.12.2007 1 :45PM DEQ/PCD/AWMB 

14, 

CONOCOPHILJ..IIpS 

8I1rUNCS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Jul-06 

N0, 493 P . 20 

I ----TONS of S02-- 

H2S PP BLOW 

Date Fcue( Gas atrse 1=umaees FCC 

Jul 1 8_45 0.01 0.01 0.02 

Jul 2 8.65 0.01 0.01 0.02 

Jul 3 8.92 0.01 0.01 0.01 

Jul 4 8.69 0.00 0.01 0.01 

Jul S 11 .64 0.00 0.01 0.01 

Jul 6 17.66 0.00 0.02 0.01 

Jul 7 9.11 0.00 0.01 0.05 

Jul 8 - 10.89 0.07 0.01 - 0.06 

Jul 9 8.26 0:01 0.01 0.06 

Jul 10 8.17 0 .00 0.01 0 .07 

Jul 1t 8.35 0.00 0.01 0.06 

Jul 12 8.80 0.00 0.01 0.05 

Jul 13 8.87 0.01 0.01 0.05 

Jul 14 20.64 0_01 0.02 0.05 

Jul 16 8.81 0.01 0.01 0.04 

Jul 16 8.84 0.00 0.01 0.05 

Jul 17 9.22 . 0.00 0.01 0.05 

Jul 18 9.05 O.U0 0.01 0.06 

Jul 19 22.81 0.01 0.03 0.06 

Jul 20 9.67 0.01 0.01 0.08 

Jul 21 9.16 0.02 0.01 0.08 

Jul 22 9.38 0.01 0.01 0.07 

Jul 23 9.97 0.01 0.01 0.06 

Jul 24 8.64 0.01 0.01 . 0.07 

Jul 25 1 1.73 0.01 0_01 0.08 

Jul 26 8.96 0.01 0.01 0.08 

Jul 27 'f 5.19 0.01 0.02 0.07 

Jul 28 8.86 0.07 0.01 0.09 

Jul 29 8.90 0.02 0.01 0.08 

Jul 30 8.88 0.02 0.01 0.08 

Jut 31 9.10 0.02 0.01 0.08 

Sulfur in Fuel 

Flare Total LbIMMbtu(1) 

0.00 0.03 0.00 

0.00 0.03 0.00 

0.00 0.03 0.00 

0.00 0_03 0.00 

0.00 0.03 0.00 

0.00 0.03 0.00 

0.00 0.06 0.00 

0.00 0.08 0.00 

0.00 0.07 0.00 

0.00 0.08 0.00 

0.00 0.08 0.00 

0.00 0.06 0.00 

0.CY0 0.06 0.00 

0.00 0.08 0.00 

0 .00 0.05 0 .00 

0.00 0.07 0.00 

0.00 0.06 0.00 

0.00 0 .08 0.00 

0.00 0 .09 0.00 

0,00 0.10 0.00 

0.00 0.11 0,00 

0.00 0.10 0.00 

0.00 0.09 0.00 

0.00 0_08 0.00 

0.00 0.10 0.00 

0.00 0.10 0.00 

0.00 0.10 0:00 

0.00 0.11 0.00 

0.00 0.11 0.00 

0.00 0.10 0.00 

0.00 0.11 0 .00 

Total 0.25 0 .37 1 .69 0.00 2.31 

Total (year-to-date) 82.89 2.75 15.90 17,02 118.56 

Notes, 1 . Sulfur in gas and oil fuels per MMb'tu's HHV. 
SEP,12 .2007 1 :45PM DEQ/PCD/AWMB N0. 493 P . 21 

. 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Aug-I6 

-TONS of Sf32 ------- 

H2S P M Bpiler 9ulfur in Fuel 

pate Fuel Gas House Furnaces FCC Flare Total LA/MMWu(1) 

Aug 1 9.81 o.02 0.01 0.08 

Aug 2 9.28 0.01 0.01 0.07 

Aug 3 18.16 0.02 0.02 0.06 

Aug 4 10,66 0.02 0.01 . 0.07 

Aug 5 10.34 o.02 0.01 0.07 

Aug 6 10.47 0.02 0,01 0.05 

Aug 7 10.48 0.02 0,01 0.05 

Aug 8 11 .86 0.02 - ~0,01 0.04 

Aug 9 11 .80 0.02 0.01 0,04 

Aug 10 11 .07 0.03 0.01 0.06 

Aug 11 10.59 0.03 0.01 0.08 

Aug 12 1 0.05 0.02 0.01 0.17 

Aug 13 10.44 0.07 0.01 0.15 

Aug 14 10.33 0.04 0.01 0.15 

Aug 15 14.34 0.05 0.02 0.13 

Aug 16 9.45 0.17 0.01 0.08 

Aug 17 , 9.47 0.07 0.01 0.15 

Aug 18 10.39 0.03 0.01 0.16 

Aug 19 10.92 . 0,02 0.01 0.16 

Aug 20 10.55 0.02 0.01 0.12 

Aug 21 10.44 0.01 0.01 0.11' 

Aug 22 10.44 0.02 0.01 0.10 

Aug 23 10.31 , 0.01 0.01 0.08 

Aug 24 10.11 0.01 0.01 . 0.09 

Aug 25 9.55 , 0.01 0.01 0.07 

Aug 26 9.47 ) 0.01 0.01 0,07 

Aug 27 9.82 0.01 0.01 0,07 

Aug 28 9.42 0.01 0.0'Y 0,06 

Aug 29 9.91 0>01 0.01 0.06 

Aug 30 9.20 0.01 0.01 0.06 

Aug 31 9.30 0.01 0.01 0.05 

0.00 0.11 0.00 

0.00. 0.09 0.00 

0.00 0.10 0.00 

0.00 0.10 0.00 

0.00 0.10 0.00 

0.00 0.08 0.00 

0.00 0.08 0.00 

0.00 , 0.07 0.00 

0,00 0.07 0.00 

0.00 0.10 0.00 

0.00 0.12 0.00 

0.00 0.20 0.00 

0.00 0.23 0.00 

0.00 020 0.00 

0.00 0.20 0.00 

0.00 0.26 0.01 

0.00 0.23 0.00 

0.00 020 0.00 

0.00 0.19 0.00 

0.00 0.15 0.00 

0.00 0.13 0.00 

0.00 0.13 0.00 

0.00 0.10 0.00 

0.00 0.11 0.00 

0.00 0.09 0.00 

0.00 0.09 0.00 

0.00 0.09 0.00 

0 .00 0.08 0.00 

0.00 0.08 0.00 

0.00 0.08 0.00 

0.00 0.07 0.00 

Total 0.81 0.37 2.76 0.00 3.94 

Total (year-to-date) $3:70 3.12 18.66 17.02 122.50 

Note: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP. 12. 2007 1 :45PM DEQ/PCD/AWMB . NQ, 493 P, 22 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Sep-06 

--_--TONS of Sa2 --- 

H2S_P_PM Boiler Sulfur in Fuel 

Date Fuel Gas House Furnaoes FCC Flare Total Lb1MMbtu(11 

Sep 1 9.60 0.01 0.01 0.05 0.00 0.07 0.00 

Sep 2 9.00 0:01 0.01 0.06 0.00 0.08 0.00 

Sep 3 10.00 0.01 0.01 0.06 0.00 0.08 0.00 

Sep 4 10.34 0.02 0.01 0.06 0.00 0.09 0.00 

Sep 5 10.05 0.03 0.01 0.07 0.00 0.11 0.00 

Sep 6 10.00 0.03 0.01 0.10. 0.00 0.14 0.00 

Sep 7 9.17 0_04 0.01 0.12 0.00 0.17 0.00 

Sep 8 9.88 0.03 0.01 0.15 - .0.00 0.19 . 0.00 

Sep 9 9.58 0.03 0.01 0.15 " 0:00 0.19 0.00 

Sep 10 9.23 0.03 0.01 0.16 0.00 0.20 0.00 

Sep 11 9.62 0.02 0.01 0.18 0.00 0.21 0.00 

Sep 12 9.02 0.02. 0,01 0.16 0.00 0.19 0.00 

Sep 13 9.71 0.01 0.01 0.15 0.00 0.17 0.00 

Sep 14 9.06 0.01 0.01 0.13 0.00 0-15 0.00 

Sep 15 9.31 0.01 0.01 0.12 0.00 0.14 0.00 

Sep 16 9.04 0.00 0.01 0.10 0.00 0.11 0.00 

Sep 17 8.59 0.00 0.01 0.08 0.00 0.09 0.00 

5ep 18 8.89 0.01 0.01 0.08 0.00 0.10 0.00 

Sep 19 8.79 0.01 0.01 0.05 0.00 0.10 0.00 

Sep 20 8.72 0.00 0.01 0.09 0.00 0.10 0.00 

Sep 21 9.22 0.01 0.01 0.09 0.00 0.11 0.00 

Sep 22 8.91 0.00 0.01 0.10 0.00 0.11 0.00 

Sep 23 9.32 0.03 0.01 0.10 0.00 0.14 0.00 

Sep 24 14.41 0.07 0.02 . 0.12 0.00 0.21 0.00 

Sep 25 9.33 . 0.06 0.01 ' 0.12 0.00 0.19 0.00 

Sep 26 7.90 0.04 0.01 0.13 0.00 0.18 0.00 

Sep 27 7.28 0.00 0.01 0.12 0.00 0.13 0.00 

Sep 28 7.22 0.00 0.01 0.13 0.00 0.14 0.00 

Sep 29 7.73 0.00 0.01 0.16 0.00 0.17 0.00 

Sep 30 7.94 0.01 0.01 0.16 0.00 0.18 0.00 

Total 0.54 0.31 3.39 0.00 4.24 

Total (year-to-date) 84,24 3.43 22.05 17.02 126.74 

Notes: 1 . Sulfur in gas and oil fuels per MMbtti's HHV. 
SEP . 12 . 2007 1 ; 46PM DEQ/PCD/AWMB N0. 493 P . 23 

CANOOOPHIILLiP3 

BILLINGS REFINERY 

SULFUR DIO)UDF- EMISSIONS REPORT 

FOR 

MOKTANA AIR QUALITY BUREAU 

Oct-06 

EC~~~E, 

FEB 0 1 2007 

MTDept Envirorujionta. ULaNry 

Pemtittin9 & Compliance Divison 

Nr ResourDea management Bureau 

.r~~.----- TONS of $02- 

H2$ PPM SO-liar Sulfur in Fuel 

Date Fuel Gas House Furnac~ FCC Flare To al LbIMMbtu_(1) 

Oct 1 8.78 0.05 0.01 0.25 0.00 0.31 0.00 

Oct 2 8.80 0.05 0.01 0.17 0.00 0.23 0.00 

Oct 3 8.75 0.05 0.01 0.15 0.00 0.21 0.00 

Oct 4 . 8.8`1 0.06 0.01 0.14 0.00 0.21 0.00 

Oct 5 . 9.02 0.05 0.01 0.13 0.00 0.19 0.00 

Oct 6 9.50 0.03 0.01 0.16 0.00 0.20 0.00 

Oct 7 8,57 0.01 0.01 0.12 0.00 0.14 0.00 

Oct 8 . 8.73 0.01 0.01 . 0.11 0.00 . 0.13 0.00 

Oct 9 8.66 ' 0.01 0.01 0.08 0.0~0 ' 0.10 0.00 

Oct 10 9.34 . 0.01 0.01 0.09 0.00 0.11 0.00 

Oct 11 8 .83 0 .01 0.0" . 0 .10 0.00 0 .12 0 .00 

OCt 12 8.96 0.01 0.01 0.11 0.00 0.13 0-00 

Oct 13 9.36 0.01 0.01 0.11 0.00 0.13 0.00 

Oct 14 8.73 0.01 0.01 0.11 0.00 0.13 0.00 

Oct 9 5 15.02 0.01 0.02 0.14 0.00 0.17 0.00 

Oct 16 9.01 0.01 0.01 0.12 0.00 0.14 0.00 

Oct 17 8.82 0.01 0.01 0.15 0.00 0.17 0.00 

Oct 18 9.10 0.24 0.01 0.12 0.00 0.37 0.01 

Oct 19 9.08 0.60 0.01 0.12 0.00 0.73 0.03 

Oct 20 9.25 0.62 0.01 0.11 0,00 0.74 0.03 

Oct 21 8.77 0.65 0.01 0.11 0.00 0.77 0.04 

Oct 22 8.11 0.73 0.01 0.11 0.00 0.85 0.04 

Oct 23 8.94 0.75 0.01 0.11 0.00 0.87 0" 04 

04 24 8.93 0.75 0.01 , 0.10 0.00 0.86 0.04 

Oct 25 9.26 0.51 0.01 0.10 0.00 0.62 0.03 

Oct 26 8.49 0.54 0.01 0.10 0.00 0.65 0.03 

Oct 27 8.58 0.53 0.01 0.13 0.00 0.67 0.03 

Oct 28 21 .27 0.57 0.02 0.14 0.14 0.87 0.03 

Oct 29 9.22 0.54 0.01 0.13 0.00 0.68 0.03 

Oct 30 9.64 0.47 0_01 0.16 0.00 0 .64 0.03 

Oct 31 8.99 0.46 0.01, 0.15 0.00 0.62 0.03 

Total 8.34 0.33~ 3.94 0.14 12.75 

Total (year-to-date) 92.56 3.76 25.99 17.16 139.49 

Notes: 1 . Sulfur in gas and oil fiueis per MMbtu's HHV. 
SEP, 12 . 2007 1 ; 4bPM DEQ/PCD/AWMB N0, 493 P . 24 

. 

CONOCOPIALIPS 

BILUNGS REFINERY 

SULFUR b10)(IDE EMISSIONS REPORT 

FOR . 

MONTANA AIR QUALITY BUREAU 

NOV-06 

- TONS of.S02----------~---------~- 

_H2S PPM Boiler 

Date Fuel Gas House Furnaces FQC 

Nov 1 13.3 0.47 0.01 0.16 

Nov 2 13.6 0.44 0.01 0.18 

Nov 3 13.6 0.43 0.01 0.12 

Nov 4 13.9 0.45 0.01 0.08 

Nov 5 14.7 0.41 0.01 0.04 

Nov 6 14.6 0.47 0.01 0.10 

Nov 7 15.2 0.59 0.01 0.13 

Nov 8 . 13.9 0.60 0.01 0.09 

Nov 9 14.4 0.59 0.01 0.1 3 

Nov 10 14.8 0 .70 0.01 0.13 

Nov 11 14.0 0.62 0.01 0.10 

Nov 12 12.0 0.73 0.01 0.10 

Nov 13 12.0 0.65 0.01 0.05 

Nov 14 13.1 0.57 0.01 0.04 

Nov 15 12.4 0 .59 0 .01 0.05 

Nov 18 11 .4 0.58 0.01 0.07 

Nov 17 15.5 0.59 0.01 0.05 

Nov 18 20.4 0.93 0.02 0.08 

Nov 19 24.0 0.86 0-02 0.12 

Nov 20 13.7 0.98 0.01 0.11 

Nov 21 13.7 0.93 0.01 0.13 

Nov 22 13.3 0.88 0.01 0.16 

Nov 23 12.4 0.52 0.01 0.17 

Nov 24 13.1 0.50 0.01 0.16 

Nov 25 12.2 0.45 0.01 0.14 

Nov 26 12.5 0.43 0.01 0.13 

Nov 27 12.4 0.49 0.01 0.12 

Nov 28 11 .4 0.62 0.01 0.13 

Nov 29 11 .3 1 .29 0.01 0.13 

Nov 30 10.3 1 .20 0 .01 0.10 

Sulfur in Fuel 

Flare Total LbIMMbtu(1) 

0.00 0.64 . 0.03 

0.00 0.63 0.03 

0.00 0.56 0.03 

0.00 0.54 0.03 

0.00 0.46 0.03 

0.00 0.58 0.03 

0.00 0.73 0.03 

0.00 0.70 0.04 

0.00 0.73 0.04 

0.00 0.84 0.04 

0.00 0.73 0.04 

0.00 0.84 0.04 

0.02 0.73 0.04 

0.00 0.62. 0.03 

0.00 0.65 0.04 

0.00 0.66 0.04 

0.00 0.65 0.04 

0.00 1 .03 0.06 

0,00 1 .00 0.05 

0.000 1 .10 0.06 

0.00 1 .07 0.06 

0.00 1 .05 0.05 

0.00 0.70 0.03 

0.00 0.67 0.03 

0.00 0.60 0.03 

0.00 0.57 0.02 

0.00 0.62 0.03 

0.00 0.76 0.04 

0.02 1 .45 0.07 

0.00 1 .31 0.06 

Total 19.53 0.37 3.29 0.04 23.23 

Total (year-to-date) 112.11 4.13 29.28 17.20 162.72 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP .12.2007 1 :47PM DEQ/PCD/AWMB N0.493 P. 25 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Dec-06 

--TONS of S02-- 

H2S PPM 

_Boiler 

" 

Date Fuel Gas House Fum s 

Dec 1 9.31 1 .17 0.01 0.09 

Dec 2 9.91 1 .14 0.01 0.07 

Dec 3 ') 0.43 0.89 0.01 0.13 

Dec 4 12.90 0.91 0.01 0.20 

Dec 5 33.39 1 .13 0.04 0.07 

Dec 6 12.88 0.97 0.01 0.12 

Dec 7 48.77 1 .00 0.05 0.14 

~ Dec $ 19.20 1 .12 - 0.02 0.12 

Dec 9 10:99 1 .12 0.01 0.11 

Dec 10 11 .00 1.12 0.01 0.11 

Dec 11 11 .06 1.25 0.01 0.07 

Dec 12 30.58 1 .18 0.03 0.05 

Dec 13 9.27 1 .01 0.01 0.05 

Dec 14 9.55 1.02 0.01 0.05 

Dec 15 10.82 0.98 ' 0.01 0.09 

Dec 16 10.30 1 .10 0.01 0.11 

Dec. 17 9.24 1 .05 0.01 0.14 

Dec 18 9.28 1,01 0.01 0.16 

Dec 19 10.01 1 .04 0.01 0.17 

Dec 20 9.22 1 .13 0.01 0.17 

Dec 21 9.84 1 .14 0.01 0.17 

D.ec 22 9.05 1 .33 0.01 0.16 

Dec 23 8.97 1 .30 0.01 0.15 

Dec 24 8.97 1 .32 0.01 , 0.15 

Dec 25 9.02 1 .33 0.01 0.14 

Dec 26 9.20 1 .34 0.01 0.13 

Dec 27 9.53 1 .36 0.01 0.13 

Dec 28 10.07 1 .37 0.01 0.14 

Dec 29 9.57 1 .39 0.01 0.15 

Dec 30 9.21 1 .40 0.01 0.15 

Dec 31 29.71 1 .42 0.03 0.15 

Sulfur in Fuel 

FCC Flare Total LbIMMbtu.(1~ 

0.00 1 .27 0.06 

0.00 1 .22 0.07 

0.00 1 .03 0.05 

0.00 1 .12 0.06 

0.00 1 .23 0.07 

0.00 1 .10 0.06 

0.00 1 .19 0.06 

0.00 1 .26 0.07 

0.00 1 .24 0.07 

0.00 1 .24 0.07 

0,00 ' 1 .34 0.07 

0.00 1 .26 0.06 

0.00 4 .07 0.05 

0.00 1 .08 0.05 

0.00 1 .08 0.05 

0.00 1 .22 0.06 

0.00 1 .20 0.05 

0.00 1 .18 0.05 

0.00 1 .22 0.06 

0.02 1 .32 0.06 

0.00 1 .32 0.07 

0.00 1 .49 0.06 

0.00 1 .45 0.06 

0.00 1 .48 0.06 

0.00 1 .48 0.06 

0.00 1 .48 0.06 

0.00 1 .50 . 0.06 

0.00 1 .52 0.06 

0.00 1 .55 0.06 

0.00 1 .56 0.05 

0.00 1 .59 0.06 

Total 36.04 0.43 ~ 3.83 0.02 40.32, 

Total (year-to-date) 148.16 4.56 33.11 17.22 203.04 

Notes: 9 - Sutfur in gas and oil fuels per MMbtu's HHV. 
SEP. 12 . 2007 1 :47PM DEQ/PCD/RWMB N0.493 P, 26 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Jan-07 

------TONS of 802--- 

H2S PPM Boiler 8ulfur in Fuel 

Date Fuel Gas House Fur_naces FCC Flare Total LbIMMbtu(1) 

Jan 1 ' 11 .20 1 .43 0.01 0.16 

Jan 2 9.68 1 .30 0.01 0.16 

Jan 3 10.06 1 .17 0.01 0.14 

Jan 4 8.42 1 .34 0.01 0.11 

Jan 5 7.99 1 .28 0.07 0.11 

Jan 6 8.91 1 .36 0.01 0.09 

Jan 7 9.21 1-09 0.01 0.11 

Jan 8 10.02 1 .12 0.01 0.11 

Jan 9 9.42 1 .00 0.01 0.11 

Jan 10 9.76 1 .15 0.01 0.12 

Jan 11 9.78 1 .14 0.01 0.94 

Jan 12 8.73 1 .23 0.01 0.15 

Jan 13 9.17 1 .34 0.01 0.15 

Jan 14 18.90 1 .82 0.01 0.12 

Jan 15 9.76 1 .51 0.01 0.95 

Jan 16 8.85 1 .30 0.01 0.14 

Jan 17 9.09 0.49 0.01 0.13 

Jan 18 9.58 0.71 0.01 0.14 

Jan 19 9.27 0.69 0.01 0.17 

Jan 20 9,62 0.67 0.01 0.17 

Jan 21 10.52 0.73 0.07 0.16 

Jan 22 8.8"I 0.69 0.01 0.19 

Jan 23 9.66 0.67 0.01 0.16 

Jan 24 12.86 0.95 0.91 0.08 

Jan 25 10.10 1 .34 0.01 0.05 

Jan 26 8.92 1 .56 0.01 0.05 

Jan 27 8.26 1 .58 0.01 0.06 

Jan 28 9.08 1 .48 0.01 0.12 

Jan 29 8.69 1 .62 0.01 0.14 

Jan 30 8.74 1 .47 0.01 0.15 

Jan 37 9.47 1 .38 0.01 0.15 

0.00 1 .60 0.06 

0.00 1 .47 0.06 

0.00 1 .33 0.07 

0.00 1 .46 0.08 

0.00 1 .39 0.07 

0.00 1 .46 0.08 

~ 0 .00 1 .21 0.06 

0.00 1 .25 0.06 

0.00 1 .13 0.05 

0.00 1 .28 0:06 

0.00 1.29 0.06 

0.00 1 .39 0.07 

0.00 1 .50 0.06 

0.00 1,J5 0.90 

0.00 1 .67 0.08 

0.00 1 .45 0.08 

0.00 0.63 0.03 

0.00 0.86 0.04 

0.00 0.87 0.04 

0.00 0.84 . 0.04 

0.00 0.90 0.04 

0.00 0.88 0.04 

0.00 0.85 0.04 

0.00 1 .04 0.05 

0.00 1 .40 0.07 

0.00 1 .61 0.08 

0_00 1 .64 0.08 

0.00 1 .60 0_08 

0.00 1.77 0.08 

0.00 1.63 0.08 

0.00 1.54 0.07 

Total 36.80 0_28 4.00 0.00 40.88 

Total (2007 year-to-date) 36.60 0.28 4.00 0.00 40.88 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP,12,2007 1 ;47PM DEQ/PCD/AWMB 

CClNC?COPHILLIPS 

BILLINGS REFINERY 

SULFUR DlOXiDB EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Feb-07 

N0, 493 P, 27 

-----r-------. .------TONS of S02-----~------------~---- 

H2S PPM 8oiter _$ulfur in-Fuel 

pate Fuel s ouse Furnaces FP_C Flare Total LbIMMbtul1l 

Feb 1 11 .41 1 .53 0.01 0.12 

Feb.2 8.91 1 .57 0,01 0.11 

Feb 3 8.64 1 .54 0.01 0.12 

Feb 4 10.57 1 .43 0.01 0.11 

Feb 5 13.52 1.44 0,01 0.13 

Feb 6 11 .49 1 .22 0.01 0.13 

Feb 7 13.0.3 1,26 0.01 0.14 

Feb 8 11 .68 1 .26 0.01 4.15 

Feb 9 11 .43 1 .36 0.01 0.15 

Feb 10 11 .51 1 .25 0,01 0.15 

Feb 11 11 .46 1 .28 0.01 0.13 

Feb 12 11 .22 1 .35 0.01 0.07 

Feb 13 14.36 1 .37 0.02 0.08 

Feb 14 14.18 1 .28 0.01 0.10 

Feb 15 9.65 1 .14 0.01 0.11 

Feb 16, 11.98 0.82 0.01 0.13 

Feb 17 11.35 0.97 0.01 0.13 

Feb 18 11 .17 1 .02 0.01 0.13 

Feb 19 9.19 1.28 0.01 0.13 

Feb 20 10.38 1 .12 0.01 0.12 

Feb 21 10.36 1.10 0.01 0.08 

Feb 22 91 .12 1 .04 0.01 0.09 

Feb 23 10.23 1,14 0.01 0-10 

Feb 24 10.60 1 .24 0-01 0.12 

. Feb 25 10.90 1 .31 0.01 0.13 

Feb 26 10.54 1 .34 0.01 . 0.13 

Feb 27 10.60 1 .35 0.01 0.15 

Feb 28 9.76 1 .33 0.01 0.14 

0,00 1.66 0.08 

0.00 1.69 0.09 

0.00 1.66 0-10 

0.00 1 .55 0.09 

0.00 1 .59 0.08 

0.00 1 .36 0.06 

0.00 1 .41 0-06 

0.00 1 .43 0.07 

0.00 1 .53 0.07 

0.00 1 .44 o.07 

0.00 1 .42 0.07 

0.00 1 .43 0.07 

0.00 1 .47 0.07 

0.00 1 .39 0.07 

0.00 1-26 0.06 

0.00 0.96 0.05 

0.00 -1 .11 0.05 

0.00 1.16 0.06 

0.00 1-42 0.07 

O.OU 1 .25 0-06 

0.00 1-19 0.06 

0.00 1 .15 0.06 

0.00 1 .25 0.06 

0.00 1 .36 0.07 

0.00 1 .45 0.07 

0.00 1 .48 0.07 

0.00 1 .51 0.07 

0.10 1 .58 0.07 

Monthly Total 35.37 0.33 3.37 0.10 39.17 

Totaf (year-to-date) 71 .97 0.61 7.37 0-10 $0.05 

Notes- 1 - Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP.12 .2007 1 :4$PM DEQ/PCD/AWMB 

CONOCGPHILI.KPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR OIUAUIY BUREAU 

Mar-07 

-r---TONS of 502---~----T------ 

N0.493 P . 2$ 

H PPIU Baler Sulfur in Fuel 

Date Fue1 GasHouse Furnaces FCC Flara Total LblMMbtu( } 

Mar 1 9.78 1 .37 0.01 0.13 0,08 1 .59 0,07 

Mar 2 9.49 1 .40 0.01 0.13 0.43 1 .97 0.08 

Mar 3 12.27 1.42 0.01 0.14 0.00 1 .57 0,08 

Mar 4 10.32 1 .33 0.01 0.15 0.00 1 .49 0.07 

Mar 5 11 .53 1.27 0.01 0.15 0.02 1 .45 0.07 

Mar 6 12.63 1 .27 0.01 0.16 0.32 1 .76 0.07 

Mar 7 10.21 1 .26 0.01 0.15 0.12 1 .54 0.07 

Mar 8 9,65 1 .13 0.01 0.13 0.00 1 .27 0.08 

Mar 9 10.22 0.95 0.01 0.18 0.00 . 1 .14 0,05 

Mar 10 9.58 0_89 0,01 0.18 0.00 1 .06 0.08 

Mar 11 10.03 0.90 0.01 0.18 0.00 1_09 0.07 

Mar 12 9.70 0_92 0,01 0.20 0.00 1 .13 0.05 

Mar 13 10.18 0.95 0.01 0.16 0.00 1 .12 0.05 

Mar 14 10.35 1 .23 0.01 0.13 0.00 1 .37 0.06 

Mar 15 14.05 1,23 0.01 0.18 0.00 1 .42 0.06 

Mar 16 16.04 1.06 0,01 0.20 0.00 1 .26 0_06 

Mar 17 11 .56 1 .14 0.01 0.19 0-DO 1 .34 0.07 

Mar 18 12.59 1-34 0.01 0.17 0:00 1 .52 0.08 

Mar 19 9'.63 1 .19 0,01 0.17 0.00 1 .37 0.07 

Mar 20 9.24 1 .14 0.01 0.15 0.00 4 .30 0,07 

Mar 21 9.79 0.39 0.01 0.15 0.00 0_54 0.02 

i1Aar 22 7.13 0.32 0_01 0.04 0,00 0.37 0_02 

Mar 23 6.65 0_45 0.00 0.00 0.00 0.45 0.03 

Mar 24 6.73 0.44 0.00 0.00 0.70 1 .15 0.03 

Mar 25 5.70 023 0.00 0.00 0.00 023 0-.01 

Mar 26 4.59 1 .09 0.00 0.00 0.70 1.80 0-07 

Mar 27 2.87 1 .21 0.00 0.00 2.59 3.81 0.10 

Mar 28 2.63 1.02 0.00 4.00 10.75 11 .77 0.09 

Mar 29 2.35 1 .29 0.00 0.00 0.00 129 0.13 

Mar 30 2.58 1.17 0.00 0.00 0.00 1 .17 0.14 

Mar 31 6.89 1 .45 0.00 0.00 0.00 1 .45 0.17 

Total 32.43 0.24 3.43 15.77 51 .87 

Total (year-to-date) 104.40 0.85 10.80 'l5-87 131 .92 

Notes, 1 . Suffur in gas and oil fuels per MMbtu's HHV. 
SEP, 12 . 2001~ 1 :54PM ~ DEQ/PCD/AWMB 

STATE OF MONTANA 

DEPARTMENT OF ENVIRONMENTAL QUALITY 

PERMITTING AND CONPLIANCE DIVISION 

AM RESOURCES MANAGEMENT BUREAU 

Box 200901 

Helena, MT 59620 

Phone (406) 444-3490 

Fax 4 (406) 444-1499 

DATE: p s~~~ a" 7 

Total Namber of Pages, including cover sheet: 

To: ~~ (3a3 3/2- G'-437 

115 . A-/'A- ~e2~ S' 4- 44-d~'k~ Pra~PAIPL 

FAX NO. : -3d 3 -- -3 1; --- ~ 467 

FROM, S -,-I CO 

N0. 494 P . 1 

ORG #:5-/-17,* 

COMMENTS: 

If L__j 

r -~ 1v.~.~~. .~.~.~ " 

vttly3 rs --~o~ 1rt.ai/ & ~, x,,~ a7 

G_larmblsupportlFormsladministrativelfaxgi7eet.doo 
SEP.12.2007 1 :55PM DEQ/PCD/RWMB N0. 494 P . 2 

H2PM . Boiler Sulfur in Fuel 

Date Fuel Gas House Furnaces FCC BEE Total LbIMMbtu-(l) 

Apr 1 2.98 1 .25 0.00 0.00 

Apr 2 4.55 .1 .13 0.00 0.00 

Apr 3 6.32 1 .33 0.00 , 0.00 

Apr4 5.11 0.79 0.00 0.00 

Apr 5 0.00 0.09 0.00 0.00 

Apr 6 0.00 0.08 0.00 0.00 

Apr 7 0.00 0.09 0.00 0.00 

Apr 8 0.00 0.08 0.00 0.00 

Apr 9 0.00 0.03 . 0.00 0.00 

Apr 10 0.00 0.00 0.00 0.00 

Apr 11 0.00 0.00 0.00 0.00 

Apr 12 0.00 0.00 0.00 0.00 

Apr 13 0.00 0.00 0.00 0.00 

Apr 14 0.00 0.00 0.00 0.00 

Apr 15 0.00 0.00 0.00 0.00 

Apr 16 0.00 0_00 0.00 0.00 

Apr 17 ~0 .00 0.00 0.00 0.00 

Apr 18 9.30 0.00 0.00 0.00 

Apr 19 3.79 0.00 0.00 0.00 

Apr 20 5.18 0.01 0.00 0.00 

Apr21 6.25 0.00 0,00 0.00 

Apr 22 6.88 . 0.01 0.00 0.00 

Apr 23 6.20 0.01 0.00 0.00 

Apr 24 5.84 0.00 0.00 0.00 

Apr 25 5.43 0.00 0.00 0.00 

Apr 26 4.92 0.00 0.00 0.00 

Apr 27 4.48 0.74 0.00 0.02 

Apr 28 5.29 1.37 , 0.00 0.12 

Apr 29 5.35 1.27 0.00 0.05 

Apr 30 5.31 1.15 0.00 0.17 

19 14 

coNOCOPtiILUP3 

BILUNGS REFINERY 

SULFUR DIOlC1DIE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Apr-07 

_ -TONS of S02--------~- 

0_0a 1 .25 0.19 

0.00 9 .13 0.21 

0.00 1 .33 0.22 

0.00 0.79 0.18 

0.00 0.09 0.03 

0.00 0.08 0.14 

0.02 0.11 0.00 

0.00 0.08 0.00 

0.00 0.03 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0 .00 0 .00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.01 0.00 

0 .00 0 .00 0.00 

0.00 0.01 0.00 

0.00 0.01 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.00 0.00 

0.00 0.76 0.18 

0.00 1 .49 0.21 

0.00 1.32 0.19 

0.00 1 .32 0.20 

Total 9.43 0.00 0.36 0.02 9.81 

Total (year-t0-date) 113.83 0.85 11 .16 15.89 141 .73 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP, 12 . 2007 1 :55PM DEQ/PCD/AWMB N0, 494 P, 3 

caNOCOPHII.uPs 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

May-07 

--.--_-----~----------TOrvs of sa2-----~--____ 

H2S PPM Boiler Sulfur in Fuel 

Date Fuel Gas House Furnaces FCC Fl re Total LbIMMbtu(1) 

May 1 11 .71 0.39 0.01 0.06 0.00 0.46 0.01 

May 2 11.93 0.23 0.01 0.04 5.40 5.68 0.01 

May 3 10.59 0.75 0.01 0.05 0.00 0.81 0.01 

May4 10.15 0.33 0.01 0.04 20.40 20.78 0.01 

May 5 11 .32 0.14 0.01 0.08 0.00 0,23 0.01 

May 6 9.96 0.10 0.02 0.16 0.00 0.28 0.01 

May 7 11 .04 0.06 0.02 0.18 15.70 15.98 0.01 Maya 10.12 0.05 0.01 0.18 0.Qo 0.24 0.01 

May 9 10.31 0.07 0.01 0.40 0.00 0.48 0.01 

May 10 10.12 0.06 0.01 0.50 0.00 0.57 0.01 

May 11 7.93 0.06 0.01 0.57 0.00 0.64 0.01 May 1 2 9.23 0.08 0.02 0.56 0.00 0.66 0.01 May 13 8.68 0.06 0.01 0.15 0.00 0.22 0.01 May 14 9.38 0.04 0.01 0.24 0.00 0.29 0.01 May 15 9.40 0.07 0.01 0.13 0.40 0.21 0.01 May 16 14.36 0.06 0.01 0.10 0.00 0.17 0.01 May 17 18.87 0.04 0.01 0.07 0.00 0.12 0.01 May 18 8 .01 0 .02 0.01 0 .07 0 .00 0 .10 0 .00 May 19 16.00 0.00 0.01 0.08 0.00 0.09 0.00 May 20 9.07 0.00 0.02 0.09 0.00 0.11 0.00 May 21 12.91 0.00 0.01 0.08 0.00 0.09 0.00 May 22 , 8.56 0.01 0.01 0.05 3.02 3.09 0.00 May 23 8.17 0.00 0.09 0.05 0.0.0 0.06 0.00 May 24 8.22 0.01 0.01 0.05 0.00 0.07 0.00 May 25 44.25 0.00 0.01 0.05 3.00 3.06 0.00 May 26 9,14 0.01 0.02 0.04 0.00 0.07 0.00 May27 8.90 0.03 0.01 0.04 0.00 0.08 0.00 May 28 9.73 0.02 0.01 0.03 0.00 0.06 0.00 May 29 8.65 0.01 0.02 0.03 0.00 0_06 0.00 May 30 8.51 0.00 0.01 0.04 0.00 0:05 0.00 May 31 9.87 0.00 0.01 0.04 0.00 0.05 0.00 

Total 2.70 0.37 4.25 

Total (year-t0-date) 116.53 1.22 15.41 

47.52 54.84 

63.41 196.57 

Notes: 1 . Sulfur in gas and oil fuels per MMbtu's HHY`. 
SEP, 12 . 2007 1 ; 55PM DEQ/PCD/AWMB N0, 494 P. 4 

CONOCOPHILLIPS 

BILLINGS REFINERY 

SULFUR DIOXIDE EMISSIONS REPORT 

FOR 

MONTANA AIR QUALITY BUREAU 

Jun-07 

--------------TONS of S02-,-______ 

H2S PPM Boiler $utfur in Fuel 

Date Fuel Ga_$ House Furnaces FCC Flare Total LbIMMlrtu(1) 

Jun 1 15.70 0.01 0.00 0.05 

Jun 2 10,99 0.01 0.00 0.05 

Jun 3 9.37 0.01 0.00 0.05 

Jun 4 9.39 0.01 0.00 0.06 

Jun 5 9.66 0,01 0.00 0.06 

Jun 6 9.35 0.00, 0.00 0.07 

Jun 7 9.16 0.01 0.00 0.07 

Jun 8 8.76 0.01 0.00 0.09 

Jun 9 9.05 0.00 0.00 0.10 

Jun ~10 9.19 0.00 ~0 .00 0.10 

Jun 11 12.49 0.00 0.00 0.09 

Jun 12 8.64 0.01 0.00 0.08 

Jun 13 9.26 0.06 0.00 0.08 

Jun 14 ,9.89 0.09 0.00 0.07 

Jun 15 9.72 0.05 0.00 0,06 

Jun 16 11 .08 0.06 0.01 0.05 

Jun 17 11 .40 0.05 0.01 0,05 

Jun 18 9,52 0.04. 0.01 0.05 

Jun 19 9.94 0.05 0.01 0.06 

Jury 20 11 .35 0.09 0.01 0.06 

Jun 21 20.13 0.06 0.02 0.05 

Jun 22 21 .08 0.09 0.02 0.08 

Jun 23 11 .66 0.12 0.01 0,09 

Jun 24 10.72 0.11 0.01 , 0.94 

Jun 25 11 .66 0.14 0.01 0.11 

Jun 26 24.75 0.12 0.03 0,05 

Jun 27 11 .50 0.07 0.01 0.04 

Jun 28 11 .56 0.01 0.01 0.07 

Jun 29 23.59 0.0-1 0.03 0.08 

Jun 30 1 11,08 0_00 0.01 0.11 

0.00 0.06 0.01 

0.00 0.06 0.01 

0.00 0.06 0.00 

0.00 0.07 0.00 

0.00 0.07 0_00 

0.00 0.07 0.00 

0.00 0.00 0.00 

0.00 0.10 0.00 

0.00 0.90 0.00 

0.00 0.10 0.00 

0.00 0.09 0.01 

0.00 0.09 0.00 

0.00 0.14 0.00 

0.00 0.16 0.00 

0.00 0.11 0.01 

0.00 0.12 0.00 

0_00 0.11 0.00 

0.00 0.10 . 0.00 

0.00 0.12 0.00 

0.00 0.16 0.00 

0.00 0.13 0.00 

2.00 2.19 0.01 

0.00 0.22 0.01 

0.00 0.26 0.01 

0.00 0.26 0.01 

0.00 0.20 0.01 

0.00 0.12 0.00 

0.00 0-09 0.00 

0.00 0.12 0.00 

0.00 0,12 0.00 

Total, 1 .27 0.19 2.17 2.00 5.63 

Total (year-to-date) 117.80 1 .41 17.58 65.41 202_20 

Notes: 1, Sulfur in gas and oil fuels per MMbtu's HHV. 
SEP. 12 . 2007 1 : 5bPM DEQ/PCD/AWMB N0. 494 P

.--

5 

Refinery Flare Stack SO2 Emissions '(>150#13-hr) for 

Ist Quarter, 2ao5 

s02 so2 

Date/Time 1bs u~ t6a1` 3-h~r _ Reason 

3l8I05 f5A0 81 .3 - - 

318105 16:00 78.2 

318/05 17:00 72.8 232.3 Hydracracker Startup 

31810S 18:00 80.7 

318105 19-00 83.0 

3/8105 20:00 24.7 788_4 Hydraaracker ftrtup 
SEP.12.2007 1 :56PM ~DEQ/PCD/AWMB N0.494 P . 6 

Ref lh ery 7rki re S t ack

~ 

t 02 Emissi,ans ~.~~f 5~ 

2nd Quarter, 2005 

602 s02 

DeteITirne _lbsthour lbst3-hour Reason 

4111105 6:00 3.1 . 

4/11/06 7:00 176.7 

4/11105 8:00 471 .3 651 .1 7305 Shutdown 

4111105 9:00 204.9 

4111105 10:00 49.7 

4t11105 11:00 46.3 301 .0 T305 Shutdown 

4/11/0518:00 . 58.1 

4/11/05 19:00 62.3 

411110520:00 62_3 182.7 T305 Shutdown 

5/1710518:00 0.4 

5/'1770519 :00 105.6 

5117105 20:00 129.0 235.1 Hydrocracker Startup 

511710521 :00 104.2 5/17/05 22:00 106.6 

6/17105 23:00 83.8 294.6 Hydrocracker Startup 

5/18/05 6:00 102,1 

5118105 7:00 100.3 

5118105 8:00 97.3 299.7 Hydrocracker Startup 

5118105 9:00 111 .5 

5116f05 10:00 121,9 

511810511:00 937.5 370.9 Hydrocracker Startup 

5/16/0512;00 153.1 

5118/05 13:00 167_5 

519810514".'Ot7 164.1 484.6 Hydrocracker Startup 

5f18/05 15:00 167.2 

5/1810516:00 181 .9 

511810517:00 162.1 491 .3 Hydrocracker Startup 

5/1810518:00 145.1 

5/1810519;00 152_6 

511810520:00 160.7 458.3 Hydrocracker Startup 

5I18/06 21 :00 161 .2 

5/18/05 22:00 163.4 

5118105 ,23:00 166.0 490.6 HydroCrdcker Startup 

5119/05 0:00 171 .5 

5/19105 1:00 169.2 

5119105 2:00 1$4_3 505.0 Hydrpcr'dcker Startup 

5119105 3:00 161,10 

5119105 4:00 179.4 

5119105 5;0f0- 177.3 517.7 Hydrocwdcker Startup 

5/19105 6:00 183.7 

6119/05'7:00 167.8 

5119/05 8:00. 215.5 567_1 Hydhocracker Startup 

5119105 9:00 18318 

5/'k9/0510 :00 207.6 

511'910511 :00 18'i .4 572.8 Hydrocracker Startup 

5/19105 12:00 152.2 

5/19/0513:00 l G2.1 

5H9/0514:00 -182;0 526.3 Hydrocracker Startup 

5/19/0515:00 200.7 

5/19/0516:00 213,1 

5/11310517:00 212.7 626.6 Hydrocracker Startup 

5119/0518 :00 217.1 

5/1910519:00 192.8 

5119105 20:00 191 .9 601.8 Hydrocracker Startup 

5119105 21 :00 178.9 

5/19105 22:00 202.1 

5119105 23:00 208_0 589.0 Hydrocracker Startup 
SEP.12.2007 1 :57PM DEQ/PCD/AWMB 

_Vb~in,6u'r ' lbsl3,n ou W201A)s 0 :00 201.e 

N0. 494 

P . 7 

5120105 

1 :00 199.6 

5120105 2:00 208.0 606.2 Hydrocraokec Startup 5l20105 3:00 221,5 

5I20105 4:00 292,0 

5120105 5:00 209.4 64.2 .9 Hydrocracker Startup 

5120/05 

6:00 218.5 ' 

5120105 7:00 ,233,6 

5120105 8:00 232.2 684.2 Hydrocrdcfcer Startup 

5120105 

9:00 220.3 

5f20/0510:00 201 .1 

512010511:00 1937 615.2 HydrOcr2cker Startup 5/2010512:00 217.5 

512010513:00 294,8 

512010814:00 25_4 537.7 HydrocMcker Startup 
SEP . 12 . 2007 1 ; 57PM DEQ/PCD/AWMB N0. 494 P. 8 

GaonMobil Bfllings Refinery 

Refinery Flare Stack S02 Emissions (>150#13-hr) for 

3rd Quarter, 2005 

sox 802 

Date/Time Ibs/houl' lbsl3-hiour Reasoh 

7/8105 9:00 0.3 

718/09 10:00 154_3 

718/0511 .-00 157.6 312.2 HC8L Shutdown 

718/05 12:00 148.6 

7/S/05 13:00 135.5 

71810514:00 162.9 446.2 HCBL Shutdown 

7/8/05 15:00 109.7 

7/6/0516 :00 96.7 

7/8/05 17:00 65.5 271 .9 HCBL Shutdown 

7/15i05 0:00 5.0 

7/15/051 :00 100.0 

7/15105 2*00 214.9 319.9 HCE3L Startup 

7/15/05 3:00 271.2 

7/15/05 4:00 310.8 

7/151055~00 254.6 836.6 HCBL Startup ' 
SEP. 12, 2007 1 :57PM DEQ/PCD/AWMBxQnMobil Billings Refinery N~~ 494 P . 9 

Refinery Flare Stack S42 Emissions (>150#13~-hr) for 

4rd Quarter, 2005 

so2 so2 

DatelTirne (bslhour IbsJ3-hour Reason 

12J27105 '12;00 877.2 

1212710513 :00 2,008.9 

1212710514:00 2,199.6 5,085.7 FCC Startup 

12127105 15:00 2,269.3 

1212710516:00 2,031 .6 

1212710517 :00 1,001 .8 5,293.8 FCC Startup 

12128105 9100 81 .0 

12128105 10:00 147.6 

1212810511 ;00 147.0 375.7 Blocked drain valve (HF1 vessel D-205C) leak to the flare 

121,28/0512:00 147.1 

12128/05 13:00 146.3 

12l28105 14:00 147,3 440.7 Blocked drain valve (HF1 vessel D-205C) leak to the flare 

1212810515 :00 146.8 

12128/05 16:00 147.2 

1212810517 :00 147.2 441 .2 Blocked drain valve (HFI vessel D-205C) leak to the flare 

12J2810518:00 147_6 

1212810519:00 147.8 

12128105 20:00 147.9 443.3 Blocked drain valve (HF1 vessel D-205C) leak to the flare 

12128105 21:00 147.1 

12128/05, 22:00 147.4 

12128105 23:00 147.4 441 .9 Blocked drain valve (HFI vessel D-205C) leak to the flare 

12129105 0:00 147.7 

12129/05 1 :00 147.7 

12/29/052:00 148.3 443.7 Blocked drain valve (HF 1 vessel D-205C) leek t0 the flare 

12129105 3:00 145.9 

12129/054.00 145.3 

12129105 5:00 145.5 436_8 Blocked drain valve (HFi vessel D-205C) leak to the flare 

12129/05 6:00 146.0 

12/29/057:00 144.3- 

12/29105 8:00 142.8 433.1 Blocked drain valve (HFi vessel d-205C) leak totheflare 

12/29/05 9:00 143_5 

12/2910510 :00 143.9 

12129105 11,00 143.6 431 .0 Blocked drain valve (HFI vessel D-205G) leak to the flare 
SEP.12.2007 1 :57PM DEQ/PCD/AWMB Na, 494 P . 10 

IbObr~qr IbW3-bo~r 

.uirua J~O:uv t9Z~9 

3171061~6:00 67.3 I . 

3!T/06 17.'~00 64.4 194.6 HF3 Shutdown 

3119106 9:00 26.6 

3/19/06 10:00 224.8 

3/19106 14 :00 242.9 494.3 Crude Startup 

3119/0612:00 568.6 

3119/0613: 00 727.0 

3/19106 14:00 629.1 1,924.7 Crude Startup 

3/19/0615:00 161 .0 

3/19I0618:00 134.9 

3/19106 77:00 97.0 392.8 Crude Startup 

Reason 
SEP. 12. 2007 1 :58PM DEQ/PCD/AWMB N0, 494 P. 11 

'EoaonMobif Billings Refinery 

Refinery Flare Stack S02 5missions (>150#13-hr) for 

2nd Quarter, 2046 

soz so2 

DsCeiTime Ibslhaur Ibs13-hour 

415106 6:00 39.1 

415106 7:00 47.4 

4/5/06 8:00 66_0 152.5 HF1 Startup 

4f13106 9:00 4.3 

4/13/06 10700 5.5 

4113106 11 ;00 312.0 321 .8 Coker Startup 

4113106 12 :00 153.0 

4113106 13:00 416.0 

4113106 "14:00 1,127_9 1,696.8 Coker Startup 

4113106 15:00 1,688.3 

4113106 16:00 408.6 

4/13l06 17:00 3.3 2,101 .2 Coker Startup 

6/?J0615;00 36.4 

612108 16 :00 330.6 

6/2106 17:00 25.3 392.2 FCC and ULEB Upset 
SEP, 12 . 2007 1 :58PM DEQ/PCD/AWMB N0, 494 P, 12 

Exconl<Aobii Billings Refinery 

Refinery Flare Stack S02 Emissions (>150#I3-hr) for 

3rd Quarter, 2006 

s02 s02 

DatelTi,me Ibslhour fbsl3-hour Reason 

7J29106 9:00 19.0 

7/29106 10:00 661.3 

7129106 11 :00 11,9 692.3 V-201 and SV-623 Lifted to Flare Dur'rng Process Upset 

$/311061200 0.1 

8l3110613:00 0,6 

8l31106 14:00 1,884.7 1,885.4 G310 due to Pump Loss on T-301 

8131106 15:00 1,723_5 

8131105 16:00 1,073.4 

8/3110617:00 87.2 2,884.1 G310 due to Pump Loss on T-301 

9/21106 21 :00 58.1 

9121106 22:00 93.2 " 

9121/06 23:00 39.8 191 .1 G312 due to TA Flooding , 
SEP. 12, 2007 1 :58PM DEQ/PCD/AWMB N0, 494 P, 13 

EbconMobil Billings Refinery 

Refinery Flare Stack S02 Emissions (>150#13-hr) for 

4th Quarter, 2006 

$02 S02 

aataiTimo Ibslhour Ibsl3-hour Reason 

1014106 21 ;00 2,7 

10/4106 22:00 243.8 

10/4l0623:00 2,8 249.3 Crude Upset 

1019/06 21 :00 37.3 

10/9/06 22:a0 6.7 

1019106 23 :00 133.0 177.0 CHUB Startup 

10/10/06 0:00 138.6 

10/10106 1100 136.1 

10910106 2:00 138.6 413.3 CHUB Startup 

10/10/06 3100 135.3 

10/10/06 4:00 133.2 

10/10106 5:00 131 .7 400.2 CHUB Startup 

10/10/06 6:00 132.2 

10/10106 7; 00 9.0 

10/10106 8:00 14.8 156.1 CHUB Startup 

10/22/06 3:0D 53.2 

10/22105 4:00 53.2 

10/22/06 5:00 53.2 159.6 FCC Startup 

10/22106 6:00 53.2 

10/22/06 7:00 53:2 

10122/06 8100 53.2 159.6 FCC Startup 

10/22106 9:00 53.2 

10/2210610 :00 $3,2 

10/22/06 11 :00 53.1 159,4 FCC Startup 

10/22/06 12:00 52.7 

10/2210613:00 50.1 

10122/06 14:00 667.7 770.5 FCC Startup 

10122/0615:00 2,058.5 

10122/0616 :00 2,337.9 

10/22106 17:00 1,491 .9 5,888.2 FCC Startup 

10/22/0618 :00 61 .3 

10122/06 19;00 89.4 

10/22/06 20,00 51 .7 202.4 FCC Startup 

10122/06 21 :00 50.6 

10/22/05 22:00 50,7 

10/22/06 23:00 57.8 159.1 FCC Startup 

10126/0615:00 $9.9 

10/26/06 16:00 197.4 

10/26/06 17:00 37.6 324.9 ULEB Shutdown 

10/26/0618 :00 54.0 

10/2F/0619-.00 21,5 .0 

10/26106 20:00 138,2 407.3 ULEB Shutdown 

10/26/06 21 :00 106.4 

10126/06 22:00 1,20 .6 

10126/06 23:00 42.9 270.0 ULEB Shutdown 

10/30/06 6;00 95.5 

10/30/06 7:00 90.4 

10/30/08 8:00 77.6 263.5 SLE5 Shutdown 

10/30/06 9:00 64.9 

10/30/0610 :00 52.3 

10/30106 11 :00 41 .0 158.2 SLEB Shutdown 
SEP . 12 . 2007- 1 :59PM DEQ/PCD/AWMB N0.494 P. 14 

ExaonMobit Billings FlefinM 

Refine" Flare Stack 502 Emissions (y1bU#13-hr) for 

Date!'rir`_ i~ 

1/17lOT 9~ :~'

. 

113dR~0~;~ ' 

11~OE0?';,~~ , . 

1l30'IiX7;y ;Q~O 

1 a~AlO~:;~ ~""' 3r4,o~';~` 

3r1 ~o~~;a 3r1~~;~'a~~ 

.- 

A~,,277.1 

`0.5 

~'~9r~.a 

~~~.es.7 

S02 

ibs/3-hour 

7st Quarter, 2007 

483.5 V-201 Upset 

1,834.9 C-311 Malfunction 

266.2 G311 Malfunction 

3,370.2 V-201 Maffunction 

279.3 V-201 Malfunction 

1,201 .1 T-201/7-208 Malfunction 

so2 

0.2 

0.2 

483,2 

1,6 

1.57.2 

1,676.1 

261 .4 

' 1,9 

2.9 

1 .s 

547.2 

"s a~ ; 761 _5 

314i!O~;~B~"E 

3,/4IO~~tS_i 

3/410'~` ~4~ 

,. _ 

N:,. . 

1 

Reason 
SEP.12.2047 1 :59PM DEQ/PCD/AWMB 

E,-oconMob7 Billings Refinery N0. 494 P . 15 

Refinery Flare Stack S02 Emissions (?15o#13-hr) for 

2nd Quarter, 2007 

soz soz 

DstaJTime lbslhour Ibsl3-hour Reason 

51111078 ;00 1 .0 

5111107 10:00 478.3 

5/11/0711,00 0.5 479.8 C-311 Vibration Malfunction 
SEP.12.2007'r 2 :08PM DEQ/PCD/AWMB 

STATE OF MONTANA 

DEPARTMENT OF ENVIRONMENTAL QUALITY 

PERNIITMG AND COMffLTANCE DIVISION 

AIR RESOURCES MANAGEMENT $UItEAX.7 

Box 200901 

Helena, MT 59620 

Phone (406) 444-3490 

Fax # (406) 444-1499 

DATE: /;z Eel , ' vC " -? 

Total Number of Pages, including cover sheet; 

TO: 

N0. 495 P . 1 

u" (20 

FAX NO. : 36 3 -3)~- 4 46f 

FROM: 

ORG ;~ : 5/-f7.¢/ 

COMMENTS- ('70, s:t:f 

-o 

G~larmblsupportlformsladsxtinistrativeVhcsheetdoc 

J4- 

v r 

0111u- 014- trio-or" , qi..e . K110 1~ 
SEP,12.2007 2 ;08PM DEQ/PCD/AWMB 

CHS 802 SIP REP( T 

1"t Qtr. 2005 

April 30, 2005 

Page 2 

N0, 495 P, 2 

A copy of the written report (dated January 19, 2005) on these exceedarices is 

included as part of this quarterly SIP report. 

EXHIBIT A-1, SECTION $(A)(5)(b)(ii) FLARING EVENTS 

There were no flaring events this reporting period. 

EXHIBIT A, SECTION VA)(1)(e)(ii) OTHER MINOR SOURCES 

As per the reporting requirements of the above-referenced section, CHS has 

used "good engineering judgment and appropriate engineering calculations" to 

attribute approximately 1 .75 tons of S02 emissions to the burning of polymer in 

the Alkylation Unit Hot Oil Belt Heater. 

Also, CHS used "good engineering judgment and appropriate engineering 

calculations" to attribute approximately 1 .82 tons of $Cz emissions to the burning 

of Unifiner Compressors' Vents in the Splitter Reboiler Heater. 

EXPLANATORY NOTE : The data for the Zone A SRU stack S02 emissions 

(see the monthly summary reports for this stack) shows quite a wide variation in 

emission levels. This is due to~the fact that during burner fuel runs through the 

Middle Distillate Unifiner (MDU) one of the Sulfur Recovery Units (SRU) is shut 

down (i .e., placed in hot standby) and bypassed around the Tall Gas Treatment 

Unit (TCTU). This will not be the case after the Ultra Low Sulfur Diesel (ULSD) 

Unit is on line . 
SEP, 12. 2007 2 :09PM DEQ/PCD/AWMB NO- 495 P, 3 

803 Hlghway 272 5 406-628-5200 

P.Q Box 909 shsfnaoem 

Laurff . MT 59044-0909 

July 29, 2005 

~=-~A ~M .O ~ 9. a'rff ."~ 9j 

~. Jim Hughes 

Air and Waste Management Buxeau 

Permitting and Compliance Division 

Departmeat of Environmental Quality 

Airport IZxdus'tzial Park 1P-9 

1371 Rimtop Drive 

Billings, MT 59105-1978 

RE: 2nd Qtr. 2005 SIP Report 

Dear Mr. Hughes: 

AUG 0 " (2005 

M7 Dept Environme; : ; , ;~uaqy 

Permitting & Comphar" I piftpn 

ArResoutaes Management Bureau 

Enclosed please find the SIP reports (written and electronic) for the CHS Inc (CHS) 

refinery for the 2nd Quarter 2005. Please note that this report -covers the period from 

April 1, 2005, through June 30, 2005. 

There were three flaxing evemts during the reporting period. Each is discussed in the 

attached report. 

Date Time Source Tatal S(7z 

4122 13 :40 -15 :43 Zone A acid 3351bs 

4/22 -4/23 23 :46 - 0:14; 

12:37 -1 :22 

Zone A acid gas 3541bs 

6/7 12:22- 12:34 Zone D acid gas 1595 lbs 

There was one event that resulted in exceedezxce of 'emission limitations. The eveut is 

discussed in the attached report. . 

Date Source Limit Exceeded Total S02 

617 Zone D SRU l -hour total 135 

617 Zone D SRU I -hour total 179 

617 Zone D SRU 3-hour total 319 

6I7 Zone D SRU Daily total 

__ 

375 
SEP, 12. 2007 2 :09PM DEQ/PCD/A'NMB 

,CtW SO2 SIP REPORT 

"~ pd Qtr. 2005 

,lulp 29, 2005 

Page 2 ' 

EXHIBIT A-1, SECTION 3fAN5)i'bNfi) FLARING EVENTS 

There were three flaring events during the reporting period. 

N0. 495 P . 4 

Zone A Acid Gas on 4122 from 13:40 -15 :43 . 

On Friday, April 22, 2005, flaring o£ acid gas from the Zone A SRU resulted in 

approximately 335 lbs of SOa emissions. At the time of the incident, the 41 SRU was 

shut down and the tail gas treatment unit was in the process of being shut down for 

turnaround . Investigation revealed that the console operator was not aware that the valve 

to the flare had opened. This resulted in a portion of the amine unit acid gas to be routed 

to the flare. 

Zone A Acid Gas on 4122 - 4/23 from 24:46 - 0:14 and 12:3'7 --1 :22. 

From Friday, April 22, 2005, to Saturday, April 23, 2005, flaring of acid gas from the 

Zone A SRU resulted in approximately 354 lbs of SOz emxssions. At the time of the 

incident, the #1 SRYJ was shut down and the tail gas treatment unit had just been shut 

down for turnaround. Investigation revealed that the console operator was not aware that 

the valve to the flare had opened. This resulted in a portion of the amine unit acid gas to 

be routed to the flare . 

Zone D Acid Gas on 617 from 12:22 --12:34: 

On Tuesday, 7une 7, 2005, flaring of acid gas from the Zone A SRU resulted in 

approximately 1595 lbs of SOZ emissions. Investigation revealed that the Zone D SRU 

tripped as a result of the loss of power to the control panel that contains the flame 

detector for the acid gas burner package. This resulted in the activation of the safety 

interlock that closes the acid gas feed valve to the SRU on the loss of flame, and diverts 

acid gas flow to the ref nery flare . The loss of power to the control panel was caused by 

the loss of power from the West Distribution Center (WDC). To reduce the likelihood of 

recurrence, CHS will provide back-up power to the acid gas and incinerator burners, as 

well as to the appropriate fire-eyes. ' 

EMiIBIT AZ SECTION 3sA)U e)fi) OTHER MINOR SOURCES 

Additionally, :in accordance with the requirements of the referenced section, CHS bas 

used "good engineering judgment and appropriate engineering calculatione' to estimate 

S02 emissions from two minor sources, as follows. 

" Polymer burning in the A.lkylation Unit Hot Oil Belt Heater: 1 .75 Tons S02 

Burning of unifiner compressor vents in Splitter Reboiler Heater: 1 .82 Tons SOz 
SEP,12.2007 2 ;lOPM DEQ/PCD/AWMB 

E'Ii.A EIVE 

October 28, 2005 

Mr. Jun T3ughes 

Air and Waste Management Eureau 

Permitting and Compliance Division 

Department of Environmental Quality 

Airport Industrial Park 11?-9 

13 71 Itimtop Drive 

Billings, MT 59105-197$ 

RE: 3rd Qtr_ 2005 Sl~1?P Report 

Dear Mr. Rughes: 

MT Dept. Env;ronmenWl Quallty 

Permliling & Compliant9 Divison 

Air Resources Management BMW 

N0.495 P, 5 

803 Highway 212 5 406-628-5200 

P.O. Styx 909 chsirc.com 

Laurel, MT 59044-0909 

Enclosed please find the SIP reports (written and electronic) for the CHS Inc (CpTS) refioery for the 3rd 

Quarter 2005. Please note that this report covers the period from July 1, 2005, through September 30, 

2005- 

There were two flaring events during the reporting period. Each is discussed in the attached report 

Date Time Source Total SU,_ 

717105 21 :23 -21 :46 Zone A acid gas 700 lbs 

$/7/05 04:43 - 0$:29 ULSD sour fuel gas 6, 200 lbs 

There were no events that resulted in exceedence of emission limitations . 

During the reporting period, CHS completed the required quarterly cylinder gas audits for the various SIP 

monitors. A report summarizing the results is attached. 

If there are any questions, please contact Karen Kennah at 4061628-5462: 

CHS hereby cerrffres [hat, based on information and belfef formed after reasonable inquiry, the statements 

and information in this document are true, accurate, and complete. 

Sincerely, 

Patrick B. Kizmtnet 

Refmery Manager 

cc: Mr. Dan Walsb-DEQ, Helena 

file 
SEP . 12 . 2007 2 :lOPM DEQ/PCD/AWMB N0, 495 P, 6 

K 

CHS $az SIP REPORT 

3rd Qtr. 2005 

Qctob&28, 2005 

Page 1 

SECTION 7 DATA REPORTING 

7(C)(Y)(e) SOURCE OPERATING TIME 

The Operating hours during the calendar quarter for the source or units associated with 

the FCC Regenerator/CO boiler stack, old SRU taii gas oxidizer stack, HDS complex 

SRU stack, main crude heater stack (when sour water stripper overheads are being burned 

in the main crude heater), and the combined fuel oil and fuel gas combustion units were 

as follows : 

Source or Unit Associated with: O e,rat-uai Aouars 

FCC Regenerator I CO Boiler stack 2208 

Old SRU tail ioxidizer stack 2208 

HDS com lex SRU stack 2208 

Main crude heater stack with oil burning) ' 0 

Combined fuel oil and fuel as combustion units 2208 

~ Fuel oil (boilers) 0 

7(,C)(1)(:E) MONITORrNG DOWNTIME 

The total monitoring downtime for the reporting period is presented in the attached Data 

Summary Sheets for each CEM. 

7 C 1 UNUSUAL CIRCUMSTANCES 

There were no instances this reporting period when phone notifications 

Circurastauces" were made. 

7LC)(Z) EXCESS EMISSIONS SUMMARY 

There were no instances of excess emissions during the repot'tixxg period. 

EXHIBIT A-1 SECTION 3 A. S iui FLARING EVENTS 

There were two flaring events during the reporting peMod. 

of "Unusual 

Zone A Acid Gas on 7/7J05 from 21 :23 - 21 :46 . 

At approximately 21 :23 on July 7, 2005, the Zone A #1 and #2 Sulfur Recovery Units 

(SRU) tripped . ,As a result, the pressure in the amine regenerator overhead receiver began 

to increase_ Within three minutes, the pressure had increased to the point that the valve to 

the refinery flare opened. Acid gas flaring occurred from 21 :23 - 21 :26 (4 minutes) and 
SEP .12 .2007 2 :11PM DEQ/PCD/AWMB 

CHS S02 SIP REPO* 

3rd Qtr. 2005 

October 2$, 2005 

page 2 . 

N0. 495 P . 7 

from 21 :30 - 21 :46 (17 minutes). A total of 700 lbs of SOZ was released during the 

event. 

CHS conducted a thorough investigation of the incident and determined the loss of flame 

detectiou in the SRU incinerator stack caused the sulfur units to trip.' CHS believes the 

opening of one or both of the TCrTt7 bypass valves caused the high acid gas flow to the 

incinerator. Flow of SRU tail gas (with a higher H2S concentration) to the incinerator 

would result in an increase in stack temperature. An increase in stack temperature would 

result in the reduction of fuel to the incinerator. CHS believes the flow of tail gas directly 

from the SR1Js and decreased fuel flow resulted in the incinerator becoming fuel lean and 

caused the flame to go out. Through Us evaluation, CHS was not able to determine or 

confirm the reason the TGTU bypass valve(s) opened. The root cause of the incident was 

the unexplained opening of the TGTU bypass valve(s). This is considered a mxalf4action. 

It should be noted that CHS has since replaced the positioners on the TGTU bypass 

valves associated with the Zome A #1 SRU . The positioners on the TGTU bypass valves 

associated with the Zoxie A #2 SRU were replaced in June 2005 . 

Ultra Low Sulfur Diesel (ULSD) Sour Fuel Gas on 8/7/OS from 04:43 - 08:29 

Qn Sumday, August 7, 2005, CHS was in the process of starting up the Ultra Low Sulfur 

Diesel Unit (ULSD) at the refinery for the first time. During the start-up process, 

specifically during the time when reactor R-901 catalyst was going through the 

presuifiding process, the sour fuel gas compressor C-902A compressor tripped and the 

spare sour fuel gas compressor C-902B could not be started . Tbis resulted in the flaring 

of sour fuel gas from the ULSD for a total of 140 minutes between the fte period of 

04:43 ,and 08:29. This resulted in total SOz emissions of 6200 lbs. 

During the investigation, CHS determined the sour fuel gas compressor shut down 

unexpectedly as a result of the motor overheating . The motor overheated as a result of an 

abnormally high molecu.lar weight gas 'being routed to the compressor for a significant 

period of time. CHS also determined that the spare compressor could not be started as a 

result of the interlock on high temperature of the compressor suction gas. The high 

temperature was a result o£ the heat tracer on the suction line being in operation while the 

compressor was shut down. 

EXHIBTT A, SECTION NA)(1)(e)(ii) OTHER 1VYYNOR SOURCES 

Additionally, in accordance with the requirements o£ the referenced section, CHS has 

used "good engineering judgment 

and appropriate engineering calculations" to estimate 

SOa emissions from one minor source, as follows. 

0 polymer burning in the Alkylatxon Unit Hot Oil Belt Heater: 1 .75 Tons SQz 
SEP . 12. 2007 2 :11 PM DEQ/PCO/AWMB~ 

CERTIFIED NO. 7003 3110 0004 9526 1408 

ranuar,r 27, 2006 

Mr. Jim Hughes 

Air and Waste Management Bureau 

Permitting and Compliance Division 

Department of Environmental Quality 

Airport Industrial Park 1P 9 

1371 Rimtop Drive 

Billings, NIT 59105-19'78 

RE: 4th Qtr. 2005 SIP Report 

Dear Mr. Hughes: 

N0.495 P, $ 

803 Highway 212 S 406-628-6200 

P.O. Box 909 chsiAcxom 

Laural, MT 590aa-8909 

. . ;., .. . . , _, ~ . 

A' . - . M `~ +A . 

PJ,i ~"?i . rnwfOiV .^.nt;d ~,~t!%.f1fy 

A; : 

Enclosed please find the SIP reports (written and electronic) for the CU6 Inc (CHS) refinery for the 4th 

Quarter 2005. Please -note that this report covers the period from October 1, 2005, tbrough December 31, 

2005. 

There were four flaring events during the reporting period . Each is discussed in the attached repoxt. 

Date Time Source Total Soy, 

1016105, 14:50 -14:55 zone A acid gas 396 ibs 

11114/OS _ 16:12 -16:24 ULSD sour fuel start;u ) 200 lbs 

11129105 

_ 

08:1:1- 08:26 ULSD sour fuel gas 482 lbs 

11130105 O8:Z9 -09:24 

total of Is minutes) 

ULSD sour fael gas --- . 5791bs 

During the reporting period, there was one event that resulted in sm exceedence of emission limitations, in 

addition to a start up and shutdown. These, events are discussed in the azta.ched report. 

Date Time Source Total SO 

10123105 09:30 -12:04 Zone D SRU 60 lbs 

10129- 

_ _ 10130105 

11 :00 10t28 - 23:00 

10/30 

Zone D SRU (shutdown) 14,9401bs 

31113105 ~ 

_ _ 

01,00- 15:00 _ Zone D SRU (startup), 864 lbs 

During the reponing period, CHS completed the required quarterly cylinder gas audits for the various SIP 

monitors . A report summarizing the results is attachedAdditionally, a table documenting compliance with the sulfur in fuel requirement is attached. 

If there are any questions, please contact Pat Haynes at 4061628-5418. 
~_ SEP, 12 . 2007 2 :12PM DEQ/PCD/AWMB N0, 495 P. 9 

CBS S()2 SIP REPO 

4th Qtr. 2005 

January 27, 2006 

Page 2 

failed and the trim air valve went closed. For this reason, the ratio of acid gas to sir in 

the SRU was not maintained in the optimal range and the efficiency of the SRU 

operation was reduced. As a result, the TOM did not receive typical tail gas from the 

SILU and the concentration of SOZ exiting the TGT(J increased. 

2. The Zone D SRU completed the shutdown process from October 28 - October 30, 

2005. A total of }.4,940 Ibs of SOZ was released during the 60 hour shutdown 

process . 

3 . The Zone D SRU completed the startup process on November 13, 2005. A. total of 

8641bs of SOZ during the 14 hour startup process. 

4. The Zone A SRU #2 shutdown on October 30 through November 2 and started up on 

November 14, during which time nn SIP limits were exceeded. 

EXHIBIT ,A-1, SECTION 3(Al(S)(b)(xx) FLARING EVENTS 

There were four flaring events during the reporting period. 

1 . On October 6, 2005, Zone A. acid gas was flared for a total of six minutes as a result 

of the unexpected shutdown of the Zone A SRUs. `A total of 396 lbs of .S0z was 

emitted between 14:50 and 14:55 . The cause of the .?U shutdown was a high level 

in the amine regenerator receiver. This results-in an automatic shutdown of acid gas 

flow to the SRYI's . Operations did not realize that the level was approaching the 

shutdown point because the level indication on the receiver did not indicate the level 

was rising . The level displacer appeared to be stuck in one position. 

2. On November 14, 2005, sour fuel gas from the Ultra Low Sulfur Diesel (ULSD) unit 

was flared fox a total o£ 12 minutes during the startup of the unit A total of 2001bs of 

SO2 was released during the event. 

3 . On November 29, 2005, sour fuel ,gas from the ULSD unit was flared for a total of 15 

minutes. The flaring event resulted in the release of 482 lbs of SO2. The event 

occurred when the ULSD C-901B hydrogen compressor shut down unexpectedly. 

The shutdown was caused by low lube oil temperature . The lube oil temperature was 

low because of inadequate insulation and heat tracing on the lube oil system. This 

event occurred during the first period of cold weather after initial ULSD startup. 

4. On November 30, 2005, sour fuel gas from the ULSD unit was flared intermittently 

for a total of 18 minutes between 8 :29 and 9:24. The flaring event resulted in the 

release of 579 1bs of S02. The flari:ag event occtured when the ULSD sour fuel gas 
SEP . 12 . 2007 2 :12PM DEQ/PCD/AWMB N0, 495 P, 10 

CBS SC12 SIP REPO: 

4th Qtr. zoas 

JanEmry 27, 2006 

Page 3 

compressor, C-902B, shut down unexpectedly. The compressor shut down on high 

discharge temperature. The temperature had increased because coolant flow to the, 

compressor was lost . All of the coolant had boiled out of the system after a steam 

hose was placed on the coolaut circulation system . The steam-hose was being used 

temporarily to address cold ambient temperatures . On the previous day, one of the 

other new ULSD compressors had shut down on low lube oil tempexatuze. Because 

of the incident on 11/29, measures were being taken in the XT,C.SA to prevent a similar 

incident. 

EXHIBIT At ,SECTION 3fA)!1~(e)('i) OTHER MINOR SOURCES 

AdditionallY, in accordance with the requirements of the referenced section, CI-1S has 

used "good engineering judgment and appropriate engineering calculations" to estimate 

SOZ emissions from one minor source, as follows. 

" Polymer burning in the Alkylation Unit Hot Oil Belt Heater: 1 .75 Tons S02 
SEP . 12 . 2007 2 ;13PM DEQ/PCD/AWMB N0. 495 P . 11 

-- ~~ ~.~-- - _-~.~- ~~--- -- - - -- ~ .~-----~,,~ 

CERTTFIED NO. 7003 3110 0004 95261j21 

April 26, 2006 

Mr- Tim Hughes 

Air and Waste Management Bureau 

Permitting and Compliance Division 

Department of Environnnental Quality 

Air,port Zndus,drial Park 1P-9 

1371 RUntop Drive 

Billings, MT 59105-1978 

RF- lst Quarter 2006 SIP Report 

Dear lvlr. Hughes= 

803 Highway 212 S 406-628-5200 

P.O. Box 909 ChsinGCORt 

Lautel, MT 59044-0909 

Enclosed please find the SIP reports (wxitten and electronic) for the CHS Inc (CY-JS) re1*uaery for the lst 

Quarter 2006. Please mote that this report covers the period from January 1, 2006, through March 'a 1, 2006. 

There were two flu-ing events during the reporting period. Each is discmsed in the attached report 

Date lime 

1127r2006 04,32-04_s4 

211W2006 20:,32 -20:57 

Source 

Zone D SRLF 

UTSD 

Total SO-Z 

1170.5 lbs . 

~49 ibs_ 

During the reporting period, there were no events that resulted in an exceedence of SIP emission limitations 

In addition, attactrments to this report include a table sunu,narizuag the results of the required quaxterly 

cylinder gas audits for the various 81I' monitors, and a table documenting compliance wit the sulfur nn fuel 

requirement. 

If there are any questions, please coutact Fat Haynes at 4061628-5418 . 

CH5 hereby cert~rles that, ba,red on information and beliefformed csftter reasonable inquiry, the statements 

and information in this documem are true, accurate, and complete. 

cc: Mr. Dan Walsh DEQ, Relena 

file - 
SEP, 12. 2007 2 ;13PM DEQ/PCD/AWMB N0. 495 P. 12 

CHs so2 SIP REF0~.~ 

Yst Qtr. 2006 

. Apri126, 2006 

Page 1 

SECTION 7 DATA REPORTING 

7(C)( 1 e SOURCE OPERATING TIME 

The Operating hours during the oa.ieadar quarter for the source or units associated with 

the FCC Regenerator/C0 boiler stack, old SRU tail gas oxidizer stack, HDS complex 

S1tU stack, main crude heater stack (when sour water stripper overheads are beiug burned 

in the main crude heater), and the combined fuel oil and fuel gas combustion units were 

as follows : 

Source or Unit As'sociated with: Operating Hours 

FCC Regenerator I CO Boiler stack 2160 

Old S1tU tail gas oxidizer stack 2160 

H7S complex SRU stack 2160 

Main orade heater stack with oil burning) 0 

Combined fuel oil and fuel as combustion units 2160 

Fuel oil oilers 517 

7 1 MONITORING DOWNTIME 

The total monitoring downtime for the reporting period is presented in the attached Data 

Summary Sheets for each CEM. Note that beginning in the 3"' Quazter of 2005, the 

sunaaary data reported in the CEM Emissions Performance section for the S02 - Old 

SRU (Zone A) CEM is based on compliance with limits included in the refinery's air 

quality permit. This is being done because the air quality permit limits are more stringent 

than the SIP limits . 

7(O(DLb,~ UNUSUAL CIRCUMSTANCES 

There were no instances this reporting period when phone totiflcations of "Unusual 

Circumstances" were made. , . 

7(G)(2) EXCESS EMISSIONS SUMMARY 

There were no instances of excess emissions during the reporting period. 

EXHIBIT A-1SEC1TON 3 A ii FLARING EVENTS 

There were two flaring events during the reporting period. 

1 . On ranuary 27, 2006, acid gas was flared for a total of 23 minutes. A total of 

11.70.8 lbs of S02 was emitted. This was caused by a faulty low level reading in 
SEP, 12. 2007 2 :13PM DEQ/PCD/AWMB 

Pagm 2 

Additionally, in accordauce 'wzth the requirements of the referenced 

section, 

used " 

CHS has good engineering judgment and 

appropriate engineering calGUtations" to estfimate 

SO~ emissions from one Minor source, as follows. . 

the SRU Waste 

Heat Soiter which an turn ,tripped the iuaterlack that automaticall shuts down the SRU. As a result of this shutdown the Amine Unit 

acid g 

Y 

as 

divertW to the flare for apProx.i=.te1Y 23 minutes. It was determined that the fat,lty reading resulted from a weld failure of the float on the level switch. 

xeplaceMent float was x-raYed pziorto i."stallin I'he 

2. 4n February 17, sour gas from the ULSD unit was flared for a 

fram, 

total of 13 minutes. 

This flaring event resulted in a release of 249 Ibs. Of 542 . The flaring g resulted a, shut down of the ~,p ~y~,ogen compressor. do`~ 04 low suction pressure This compressor shut as a result of a £razez~ t~raxtszuitter. The transmitter froze as a result 4f inadequate freeze protection. Additional freeze been installed. protection has 

gto ensure the weld was good 

E~T'Y' ~r S~CTxON 3 .A X e ~i OTHER MIY4R S4YJRC.US 

' FolYmer burning in the A1kylation Unit Ijot 01, Belt ,eater: 

1 .75 

Tons SO z 
SEP .12.2007 2 :14PM DEQ/PCD/AWMB 

HS 

CERrTF'MD NO. 7003 3110 0004 9526 1627 

July 26, 2006 

Mr. Dan Walsh 

Air Compliance Section Supervisor 

Permitting and Compliance division 

Air and Waste Management Htueau 

Department of Environmental Quality 

RE; 2nd Quarter 2006 STP Report 

Dear Mr. Hughes: 

JUL 08 E 2006 

MT Dept Environmental 044 

PemilNng 8 Comp&ance Dfvison 

Air Resources Ma= gement Bureau 

Na. 495 P . 14 -, . 

803 H19hvray 212 5 

p.0. Box 909 

Laulel. MT 590a4-0909 

a0"28-5200 

ditinGCom 

Enclosed please find the S7P reports (wtitten and electronic) for the CHS lzc (CHS) refinery for the 2' 

Quarter 2006. Please note that this report covers the period from April 30 through June 30, 2006- 

There were three flariag events during the reportuag period . Each is discussed in the attached reportDate Time Source Total SOi 

4/07/2006 14:45 FCCU WG Compressor 190 lbs . 

5119/2006 09_30 Zone D SRU 10.72 Tons 

6I07I2006 ~ 17;42 Zone D C902A Compressor 479 lbsDuring the reporting period, there was one event that resulted in an exceedence of SIP emission limitations. 

Date Time Source Total S02 

5119l2006 ~ 09_30 Zone D SRU 621bs. 

During the )reporting period CHS completed the an.cual RATA for each of the analyzers. These reports will 

be subrnitked separately. Additionally, a table documenting compliance with the sulfur in fuel requirement 

is attached. 

If there are any questions, please contact Pat Haynes at 4061628-5418 . 

CHS hereby certifies that, based on information and belief formed after reasonable inquiry, the statements 

and information in this documerrr are true, accurate, and complete. 

Sincerely, 

P~.~ ~ t~ ` 

Patrick B- Kimmet 

Refinery Manager 

cc: Mr- Jim Hughes--DEQ, Helena 
SEP,12,2007 2 :14PM DEQ/PCD/AWMB 

C1IS SOz SIP REPiD7~`"~' 

2nd Qtr. Zaos 

July 2s, 2006 

P$ge2 

r 

N0.495 P, 15 

stabilize the unit operations. During that time, the stack SdZ limits, were 

exceeded. The investigation determined that the nitrogen header failed by 

cracking due to the extreme thermal stresses caused by inadvertent introduction of 

nitrogen into the header from the supply tank while it was being filled. The 

supplier, which owned this supply system., had made a system modification that 

did not have adequate hazard review prior to placing in operation. The system 

was returned to the original design. In addition, the supplier has instituted a 

hazard zeview process for changes. 

EMIBIT A-X SECTION 3()(S)fb)(ii) MARING EVENTS 

There were three flaring events during the reporting period. 

1 . On April 7, 2006, the west FCC wet gas compressor tripped off on loss of lube oil 

pressure causing wet gas to be flared for approximately nine minutes. This 

resulted in the release of about 1901bs. of S02. The east wet gas compressor was 

already down fox maintenance so was unavailable. A temporary bypass line had 

been installed around the filter but could not provide sufficient flow to keep the 

compressor on line. The investigation found that the loss of lube oil pressure was 

due to coke that had formed on a deteriorating lube oil electric heater. This coke 

had flaked off, thus plugging the lube oil filter . The heater elements were 

removed until a new element can be installed, In addition, parallel lube oil filters 

will be installed on both wet gas compressors to allow for switching of filters 

online. 

Z. See the description of the May 19, 2006 incident listed under excess emission 

summary3 . On June 7, 2006 the Zone D XJLS,17 Unit C-902A compressor tripped . Attempts 

were made to start the standby compressor, C-902B but were unsuccessful. 

Additional attempts were made to restart C-902A. and were eventually successful . 

During this time, the unit reduced rates to minimize the impact The compressor 

shutdown resulting in D909 off gas being routed to the flare for approximately 30 

minutes. About 479 pounds of S02 was released during this event. The 

investigation indicated that C-902B could not be started due to a blown fuse in the 

electrical feed system that resulted from the way the compressor had been started 

in the past_ The blown fuse was replaced and additional start-up instructions for 

the compressors were issued. 
UP, 12. 2007 2 :15PM DEQ/PCD/AWMB 

K'~^"ra 

CE1tTWmD NQ. 7003 3110 0004 9526 4218 

October 30, 2006 

OCT 3 4 2006 

Mr. Dan Walsh 

Air Compliance Section Supervisor 

PertnXtting and Compliance division 

Air and Waste Management Bureau 

Department of Environmental Quality 

PQ Sox 200901 

Helena, MT 59620-0901 

RE: 3rd Qu.arter 2006 SIP Report 

Dear Mr. Walsh: 

o1A ~.+c .R lY As.. ,~$' 

MT Dap 

Parml;ting 8 Compliance Divlsptl 

Air Raspurces Management Bureau 

N0.495 P . 16 d 

603 Hig+iway 272 5 406-628-5200 

p~0. Box 909 chsinc,com 

Laurel, MT 590a4-0909 

Enclosed please find the SIP reports (written and electronic) for the CI:IS Inc (CHS) 

refinery for the 3rd Quarter 2006. Please note that this report covers the period from July 

1 through September 30, 2006. 

There were no flari.ng events during the reporting period. In addition, during the 

reporting period, there were no events that resulted in an exceedence of SIP emission 

limitations. 

During the reporting period CHS completed the quarterly Cylinder Gas Audit for each of 

the analyzers. This infoxmation is attached. Additionally, a table documenting 

compliance with the sulfur in fuel requirement is attached. 

If there are any questions, please contact Pat Haynes at 406162$-541$. 

CHS hereby certifies that, based on information and belief formed after reasonable 

inquiry, the statements and inforrnation in this document are true, accurate, and 

complete. 

Sincerely, 

Patrick B, Kimxnet 

Refinery Manager 

cc: Mr. Jim Hughes--DEQ, Helena 
SEP, 12 . 2007 2 :15PM DEQ/PCD/AWMB N0, 495 "P, 1,7 77, 77." 

jCHSj 

CERT1k9ED NQ. 7006 2150 0003 4374 5164 

April 25, 2007 

Mr. Dan 'GG'alsh 

Air Compliance Section Supervisor 

Perinittxng and Compliance division 

Air and Waste Management Bureau 

Department of Environmental Quality 

PO Box 200901 

Helena, MT 59620-0901 

RE: Xst Quarter 2007 SIP Report 

Dear Mr. Walsh: 

803 Highway 21Z 5 4Q&6284100 

P.O . Box 909 efisinr-r,pr, 

Laurel, PIT 5904A,0909 

APR 2 5 2007 

MT Dept, Environmental Qq31i4/ 

Permitting & compliance DM= 

AIrRw+wroe4laeagemente1rrew 

Enclosed please find the SIP reports (written and electronic) for the CHS Inc (CHS) 

refinery for the 1st Quarter 2007. Please note that this report covers the period from 

January 1 through March 31, 2007. 

During the reporting period, there were no flaring event ands no events that resulted in an 

exceedence of SIP emission. limitations . 

During the reporting period CHS completed the quarterly Cylinder Gas Audit for each of 

the analyzers . This information is attached. Additionally, a table documenting 

compliance with the sulfur in fuel requirement is attached. 

If there are any questions, please contact Pat Haynes at 406/62$-541$ . 

CHS hereby certifies that, based on 'information and belief formed after reasonable 

inquiry, the statements and information in this document are true, accurate, and 

complete. 

Sincerely, 

Patrick B. Kimmet 

, 

Refinery Manager 

e e : Mr. Jim Hughes-DEQ, Helena 
-SEP .12.2007 2 :16PM DEQ/PCD/AWMB NO-495 P, 18 

4 6- 

CERTrE'TED NO. 7006 2150 0003 4374 9780 

July 30, 2007 

Mr. Dan Wa1sh 

Air Compliance Section Sapervisor 

Permitting and Compliance division 

Air and Waste Managemexit Bureau 

Department of Environmental Quality 

PQ Box 200901 

Helena, MT 59620-0901 

RE: 2nd Quarter 2007 SIP Report 

Dear Mr. Walsh: 

603 Hiphway 212 S 

P.0, BOX 909 

Laurel, HT 590a40909 

JUL 3 1 2007 

MT 4epta(En*onmec0 41R''N 

p0ang & Comp6ance D'MSion 1 Air Resou(ces Management 

Enclosed please find the SIP reports (written and electrozzic) for the CHS Inc (CHS) 

refinery for the 2nd Quarter 2007. Please note that this report covers the period from 

April 1 through June 30, 2007_ 

During the reporting period, there were 3 flaring events, one of these events also resulted 

in an exceedence of SIP emission limitations, The incident reports for these are attached. 

During the reporting period CH5 completed the anwual RATAs for all analyzers except 

the FCCU analyzers . The FCCU analyzers were relocated from the regenerator duct to 

the stack during turnaround due to the installation of the ESP. ,A. CCrA was completed in 

June on tb,ese analyzers prior to start up. This information is attached. The CGA was 

completed in July. Additionally, tables documenting compliance with the sulfur in fuel 

requirement aro attached. 

If there are any questions, please eontac't Pat Haynes at 406/62$-541$. 

CH'S hereby certifies that, based on information and belief formed after reasonable 

inquiry, the statements and information in this document are true, accurate, and 

complete. 

Sincerely, 

Patrick B, Kimmet 

Refinery Manager ' 

cc: Mr. Jim fiugh,es-DEQ, Helena. 
SEP, 12 . 2007 2 :16PM DEQ/PCD/AWMB N0. 495 P . 19 L 

CHS S02 SIP I2EPOR1~ 

2nd Quarter 2007 

July 30, 2007 

Page 2 

7(G)(2) EXCESS EMISSIONS SUMMARY 

There was one instance of excess emissions during the repo;rtiq period. This was related 

to the 5/1612007 power dip. The incident report for this is attached. 

EXHIBIT A-1, SECTION 3(.A)(5)(b)(ii) FLARING EVENTS 

There were three flaring events during the reporting period on the dates listed below. The 

incident reports for these dates are attached. 

1 . 5/16/2007 

2. 6/13/2007 

3. 6r22/z007 

E)MRIT A, SECTION 3(A)(I)fe)!xx) OTHER MINOR SOURCES 

Additionally, in accordance with the requirements of the referenced. secti.m, CHS has 

used "good engineering judgment and appropriate engineering calculations" to estimate 

SOZ emiSSionS from one minor source, as follows. 

Polymer burning in the Alkylation Unit Hot Oil Belt Heater: 1 .75 Tons SOz 
SEP, 12 . 2007 2 :16PM DEQ/PCD/AWMB N0. 495 P, 20 

CHS, Inc. Incident Report 

Type of Incident x Acid Gas Flaring Incident 

H drocarbou Flaring Incident 

x Tail Gas incident 

CHS Incident M ' Refy-ZonsA-07-14 

CHS incident Title Acid Gas FLdAg incident 

Incident Date June 13, 2007 

Incident Duration 

Start Date Start Time End Date End Time S02 Tons 

Zone A Acid Gas Flaring 6113/2007 20:49 6/13/2007 ' 21 :40 0.97 

Zone A 42 SRU SID 6/13/2007 19;00 6/14J2007 13 :00 1 .09 

SOZ Calculation Method: 

Zone .A Acid Gas to Flare 

Acid gas from amine unit - 

Toms of S02 - (FR)*(TD)*(Conc . H2S)*(8.44* 10"5) 

FR = Average flow rate to flaring device during flaring, sefllu 

TD ;-- Total Duration of flazing, hours 

Conc. H2S = A'vexa,ge concentration of H2S in gas during flaring, scf HZSlsef gas 

Tons of S02 = (14,681)*(51160)*(0.93)*(5 .44* 10"5) . 

Tons of SUz ~ 0.97 

Zone A #2 S1zU S/D Natural Gas purge b assed TGTTJ to hacinexatox 

Date Number of Hours MMSCFH Estimated S02 5021bs Total 

PPM, 

6113/2007 5 0.2663 

_ _ 

3000 ~675.02 - - - 

6/14/2007 13 0.2268 3000 ~ 1494.99 

~vLKI , ~ f ' 

concentration is based on historical data obtained during shutdown activities 
SEP . 12, 2007 2 :17PM DEQ/PCD/AWMB N0, 495 P, 21 

S02 Calculation Method: 

SQ2 lbs = (Incinerator Stack Flow rate)*(Sp2 cone)*(Q.x69a:X0-6)*(Number of Hours) 

A fire on the #2 SR'C)' Boxler aecessitated shutting the unit down. The #1 SRCJ was already down for 

turnaround. In order to accomplish this the acid gas feed to #2 SRU needed to be transferred to the ,Zone 

D SRrJ". Rates were reduced on the HC?S Unit and the ULSD Unit to reduce acid gas feed to both Zone A 

and Zone 17 so that the Zone D SRU could manage the entire acid gas load, Just after transferring the load 

to Zone D, the acid gas compressor in Zone A tripped. This resulted in the flaring of acid gas for 

approximately 51 minutes until the compressor could be restarted. . 

The fire in the #2 SRU Boiler was believed to have been due to a leak on the Boiler head at the gasket. 

Although. there was no evidence to indicate an ongoing leak the gasket was tightening stopping the leak. 

However, the #2 SRU remained in the shut down mode until the following afternoon so that the 

equipment and piping could be inspected in daylight to ensure that notbiag was missed. Further 

inspection revealed that there was sulfur under the insulation that had ignited . The sulfur was likely from 

a previous leak that had stopped. , 

Steps Taken. to Limit the Duration and/or Quantity of 802 Emissions*. 

Standard procedures were maintained for the shutdown on the sulfur unit. As indicated above, the rates to 

the uuits generating acid gas were reduced to 'minimize the acid gas feed, thus the amount of acid gas 

flared was minimized. 

The installation of the line between the Zone A and Zone D sulfur units allowed for the shut down of the 

9 2 SRU ,without the need to flare acid gas. 
SEP, 12. 2007 2 ;17PM I ~QEQ/P,C,Q/RWMB ~- ~ Nn , 495P, 22 

Description of Action Item 

Replace insulation at #2 SRU boiler head and seal around 

mrwa .y such that sulfiu' won't leak underneath . 

Evaluate the potential of putting the acid gas compressor 

on standby wheo. Zone A is operating on one sWfur unit 

update operating procedures accordiagly if this is 

feasible. 

Assess start up procedures for the acid gas compressor to 

determine if an update is needed following the first use. 

Train operators on existing procedure or on the updated 

procedure, as applicable. 

Information Required By Consent Decree Paragraph 79(f) 

712712007 1 101112007 

11/1/2007 1 12J31/2007 

11/1/2007 1 12/31/2007 

(a) The root cause of this incident was the presence of sulfur under the insulation from a previously 

undetected leak. The root cause of this acid gas flaring event was not the result o£ the provisions of 

Paragraph 85 (a) (error resulting from careless operation), SS (b) (failure to follow written procedures), or 

SS(c) (failure of equipment due to failure to operate and maintain that equipmeo,t in a manner consistent 

with good engineering practice) . M incident does not fall. under the conditions in Paragraph 86 because 

the incident did not result in emissions of greater than 20 pounds per hour continuously for greater than 

three hours and the total number of Acid Gas Flaring J.ncidents in the last twelve months is less than five. 

(b) This incident falls under Paragraph 87(a)(2) because this is the first time occurrence of this root cause. 

Although the incident vas sudden and infrequent, CPIS asserts that it was not reasonably preventable 

through the exercise of good engin.eering practice. 

Target Target Completion 

Commencement Date 

Date 

(c) This incident does not fall under either Paragraph 86 or Paragraph 87(b). CTlS does not assert a 

defense to the Flaring Incident. . 
SEP.12.2007 2 :1$PM DEQ/PCD/AWMB 

- 

CBS, Inc. Incident Report 

N0.495 P . 23 

Acid Gas Flaring 1ttcident 

I Tail Gas incident 

&drocarbon Flaring Incident 

Refy-Genl-07-30 

Power Dip - Acid Gas Flaring/FXC Flaring Incident 

SpZ Calculation Method: 

Zone A Acid Gas to Flare 

Acid gas from amine unit - . . 

Tons of S02 = (FR)*(T'D)*(Conc . HZS)*($.44*10"1) 

FR =Average flow rate to flaring device during flaring, scflhr 

TD = Total Duration of flaring, hours 

Conc. H.2S = Average concentration of HZS in gas during flaring, sc,f H2S/scf gas 

Tons ofSQz=(10,513)*(49/60)*(0 .93)*(8 .44*10"S) 

Tons of $02 = 0.674 

Zone Y) Acid Gas to Flare 

~ Acid gas from amine unit - ' . 

Tons of SO2 = (FRr(TD)*(Conc. HIS)*($.44* 10-5) 

FR !m Average flow rate to flaring device during flaring, scfThr 

TD = Total Duration of flaring, hours 

Cone. H2S = Average concentration of HaS in gas during flaring, scf H-2S/scf gas 

.~c:;' . . 

~ ~ions of S4z = 0 .535 ' 
SEP, 12. 2007 2 ;1$PM DEQ/PCD/AWMB N0. 495 P. 24 

. .,_ 

C,jcuX$tions cont' d 

A16 E m.issio x as , er Flaring ,O 

LOW Pressuze Vapor Recovery System 

Zoxne D D909 

Za,rLe C FCCu 

1V1isc. small sources 

Total . 

0.243 

0.1245 

0.1205 

0.05 

0.538 tons S02 

Description of Incident: 

A s part o£ a project to upgrade to new electrical switchgear, CHS was changing feed to s. Substation 2 

transformer from 4160 to 12.5 k-,r . Following this switch while powering the' affected transformer back 

up, there was a power dip due to an internal fault in the Substation 2 transformer. Tbe fault resulted in 

voltage drop on the main (L~~1) system to 1 .6 kv for 0.110 seconds. The voltage drop resnlted in the 

temporary shutdown of various pieces of equipment and units throughout the refiwery. The shutdown of 

the sulfur units resulted in acid gas Raring for about 108 minutes. Flaring of various other hydroca:rbom 

s&ams continued until about 23 :00. The zestart of the equipmeat was hampered by recent radio changes 

that bad been implemented in preparation for the turnaround. 

Steps Taken to Unit the Duration and/or Quantity of S42 Emissions; 

The units/equipment were brought on line as quickly as possible. Because of the loss . of upstream 

equipznentlunits the amount of acid gas that needed to be flared was minimal. 

Investigation Findioas and RecoxumendaiioW: 

The Cause Chart for this incident is attached to this report. One of the issues that contributed to the 

difl"zculty in bringing the units/equipment back on line was the radio system- some claanges had been 

made in preparation for the turnaround that contributed to some comrntrri.ication Problems. Plans are in 

place to make changes to resolve this and will be implemented upon receipt of the appropriate license . 

This has been included as a cozxeetive action item. . 
SEP

.

. 12, 2007 . 2 :19PM DEQ/PCD/AWMB N0. 495 P. 25 

CHS,Inc. Incident Report 

Type of Incident Acid Gas Flarinq Incident 

Hydrocarbon Flaring Incident 

X Tail Gas incident 

CHS Incident )CD Refy-GenI-07-30 

CHS incident Title Power Dip - Tail Cras Incideat 

Incident Date May 18 - 22, 2007 

Incident Duration 

Start Date Start Time End Date End Time S02 Tons 

Zone D SRU 5/18/2007 07:00 5/21/2007 10:00 10.1 

Zone A #2 SRU 5117I2007 10:00 5/22/2007 20:00 9_7 

Zone D SRU Shut down 

Date No. of Hours NIMSCFH Estimated S02 

PpMl 

S421bs Total 

5118. 17 0.2594 6000 4472 

5/19 24 02704 6000 6580 

5/20 24 0.2716 . 6000 6610 

5/21 10 0.2428 6000 2462 

Total 201241bs 

10.1 torts 

Zone A #2 SRU Natural Gas/Acid Gas Feed - Bypassed TGU to Incinerator 

Date Number of Hours N M-SCk'H Estimated S02 

PPM, 

S02 lbs Total 

5/17 14 0.2588 3000 1837 . 

5/18 24 0.2778 3~000 3380 

5>>4 '7d (17gS7 ,, no n . ~ .5 oe . 

5/21 24 0.2464 31000 2998 

5/22~ 20 0.3058 ' 3000 3101 

Total 19507 Ibs 

9.7 tons 

' concentration is based on historical data obtained during shutdown activities 
SEP . 12 . 2007 2 ;19PM DEQ/PCD/AWMB N0. 495 P, 26 

J So?, CalcuIa.tion Method: . 

$OZ lbs = (Incinerator Stack Flow rate)*(SO2 eonc.)*(0 .159x10_6)*',(hTumber of Hours) 

Description of Incident: 

During the power dip incident on 5/16/2007, there was a small fire on the #1 Crude Unit overhead & fan. 

The #2 Crude Unit had already been shut down for turnaround. The #1 Crude Uxtxt was shutdown to 

isolate the fin fan. The loss of the crude units reduced feed available through the rest of the facility, In 

addition, the site bad reduced inventories in preparation for the turnaround scheduled to begin, 5/18/2007 . 

This comiaiuation of factors resulted in the need to shut down the YJY,SD (5117) and the HAS Units (5/18). 

The FCCU went on minimum rates until 5/1,8 when the planned shut down was initiated . These shut 

downs in turn resulted in a reduction. of acid gas feed causing the subsequent shutdown of the Zone T) 

SRU 5I18, The small amount of acid gas feed to Zone A #2 SRU was supplemeated with natural gas 

beginning on 5117. The #Z SRU stayed down after the 5h,6 power dip for the scheduled turnaround. 

The emissions provided. in the previous section are those related to the SRU shutdown activities . The 

normal shutdown process is to introduce natural gas to the SItU to remove molten sulfur from the catalyst 

bed. As part of the normal shutdown process, this stream is routed around the TOW directly to the 

incinerator. 'I'bis burnout process takes several days and results in the higher S02 emissions from the 

incinerator stack. 

As soon as sufficient feed was available from the crude unit, operating units were brought back on line in 

3diti4m to the sulfar units as sufficient acicwas generated On 5/19 the #1 Czude unit was brought on 

_lue followed by the TTDS and Zone U SRLI on 5121 and the ULSD and #2 SRU on 5/24. The FCCU atd 

other 1ma,ts were shut down begizuai,ug 5/18 for a previously scheduled turnaround . 

The affected fin fan from #1 Crude Unit has been repaired and will be put back on line following the fall 

2007 tunpiaround. 

Steps Taken to Limit the Duration and/or Qu2ntity of S02 Emissions: 

Standard procedures were maintained for the shutdown on the sulfur units . The crude unit work was 

completed as quickly as possible to bring the unit back on line and provide feed for the other units . 
SEP, 12. 2007- 2 :20PNL._DEQ/PCD/AWMB 

~Actiou Items 

~escz~ptian of Action Item 

- -- NO. 495 

Review the P1VM0 plan for potential improvements and 

date accordir_i& 

implement revisions to the radio system to include the 

addition of 2 repeaters to the wasting and add 5 

independent back receivers (one per zone 

Implement the now corrosion control strategy on the 91 

Crude Unit Overheads. 

Identify high risk electrical activities and develop 

guidelines to consider in work planning to 

,friimize/m7.tigate the potential. risks . This should 

include a communication strate for the lant. 

Operations will identify response and preparation needs 

for the electrical activities identified as high- risk 

Information IteqWred $y Consent Decree Paragraph 79(f) 

(a) The root cause o£ this incident was the failuxe of the No . 2 Substation transformer due to an internal 

fault. The root cause of this acid gas flaring event was not the result of the provisions of Paragraph 85 (a) 

(error resulting from careless operation) or 85 (b) (failure to follow written procedures) or 85(c) (failure 

of equipment due to failure to operate and maintain that equipment in a manner cousistent with good 

engineering practice). This incident does not fall under the conditions i.u Paragraph 86 because although 

;he incident did result in emissions of greater than 20 pounds per hour continuously for greater than three 

hours, the PMO plan was followed and steps were taken to limit the duration and/or quantity of emissions 

associated with the incident and the total number of ,Acid Chas Flaring Incidents in the last twelve months 

is less than five. 

(b) This incident faUs uuder Paragraph 87(a)(1) because this is the f=t time occurrence o£ this, root cause_ 

the incident was sudden and infieequent, and it was not reasonably preventable through the exercise of 

good engineering practice. 

(c) This,incident does not fall under either Paragraph 86. or Paragraph 87(b). CHS does not assert a 

defezxse to the Flaring Incident. 
SEP, 12 . 2007 2 :20PM DEQ/PCD/RWMB --I- N0. 495 P. 28 

. CFIS, Inc. Incident Report 

Type of Incident X Acid Gas Flaring Imcident 

ydrocarbon Flaring Yncident 

. Tail Gas incident 

CHS Incident ED Refy-ZoneA-07-213 

CHS incident Title Steaut control valve failure 

Incident Date June 22, 2007 

Itwident Duration 

Start Date Start 'T`ime End Date End Time Total S02 Tons 

612212007 8:00 6122/2007 8:51 0.6 

S02 Calculation Method: 

Zone A Acid Gas to Flare 

Acid .gas from ammine unit - ' 

Tons of S0z = (k'lz)*(T'D)*(Conc. IT2S)*($.44* 10-s) 

FR ;-- Average flow rate to flaning device during flaring, scf/hr 

TD = Total Duration of flaring, hours 

Conc, H2S = Average concentration of HZS in gas during flaring, scf FIzS/scf gas 

Tons of S02= (8973)*(51/60)*(0.93)*(8 .44*10-5) 

Tons of SOZ = 0.60 

Description of Incident: , 

The scaffold builders in the pipe rack removing scaffolding in the Amine Unit stepped oia the air line on 

the steazn control valve for the MDEA stripper reboiler. This resulted in the valve opening providing an 

inzrnedzate and large increase in steam flow to the stripper, 

This in turn increased the temperature resulting in au increased overhead flow from the MDEA stripper. 

From this the pressure increased on the stripper receiver. This acid gas feed is pressure controlled to the 

SRU's. The increased pressure exceeded the limits resulting in the flare valve opening to relieve the 

pressure_ Acid gas was flared for approximately 51 minutes. Subsequently the level in the stripper 

receiver increased and when it reached a lugh level, the interlocked tripped both of the sulfur units for a 

very brief period of time. The caused acid gas to be flared. 
SEP, 12. 2007- 2 ; 21 PM =,,7 -DEQ/PCD/AWMB N 0. 4 9 5 - P - 29 

[ 

The ir=ediate response to the incident was to manually block in the oontrol valve and manually open the 

steam bypass to the Reboiler. 

,PS &,a^er.& Su JLJ axAlor Quantity 0 MISSIons : 

The air line was immediately replaced. 

The potential safety and operational issues had been reviewed with contractors working in the piperack. 

Investigation Findings and Recommendations: 

The Cause Chart for this incident is attached to this report. 

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: - 
SEP.12.2007 2-21PM DEQ/PCD/RWMB r 

on Items 4~5~P30 

, "Y'argefi Target Completion 

Description of Action Item Commencement Date 

Date 

Review incident and learnirl with the Zone A operators 10/1/2007 111112007 

For response action -- evaluate the potential to drain 

MDEA stripper to the sour water system during times of 101112007 12/3112007 

high levels in the MDEA receiver. This nlay help 

mitigate a bit level tri of the SRL3's. 

Information Required By Consent Decree Paragraph 79(t) 

(a) 'The root cause of this incident was inadequate attention to the area by the contractors in the pipe rack. 

The root cause of this acid gas flaring event was not the result of the provisions of Paragraph 85 (a) (error 

resulting from careless operation) 85 (b) (failure to follow written procedures), or 85(c) (failure of 

equipment due to failure to operate and maintain that equipment in a m.anner consistent with good 

engineering practice) . This incident does not fall under the conditions in Paragraph 86 because the 

incident did not result in emissions of greater than 20 pounds per hour continuously for greater than tbree 

hours and/or quantity of emissions associated with the incident and the total iiuxnber of Acid Gas Flaring 

Incidents in the last twelve months is less t= five, 

(b) This incident falls under Paragraph 87(a)(1) because this is the first time occurrence of this root cause. 

the incident was sudden and infrequent, and it was not reasonably preventable through the exercise of 

good engineering practice. 

(c) This incident does not fall under either Paragraph 86 or Paragraph 87(b) . CHS does not assert a 

defense to the Flaring Ineident. . 

NO 
SEP .13 .70072 1 :57PM DEQ/PCD/AWMB 

STATE OF MONTANA 

DEPARTMENT OF ENVIRONMENTAL QUALITY 

PERMMING AND COMPLIANCE DMSION 

AIR RESOURCES MANAGEMENT BLMEAU 

Box 200901 

Helena, MT 59620 

Phone (406) 444-3490 

P'ax # (406) 444-1499 . 

DATE: 13 , Z7 

Total Nuxnber of Pages, including cover sheet: 3 

TO: 

N0, 500 P, 1 

L,&jZ7 (~S -7-" 6 (3-63) 34a-Z431 

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FAx NO. . -363-3l~ ----~ *Y 

ORG#: 5-/ 1-7-* 

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as/SEP, 13 . 2007 j 1 : 58PM~ 4oEDEQ/PCD/AWMB . ~' ~oss N0, 500 P, 2 

CKS, lnc.Incident ltepart 

Type of Xnciclenf Acid Gas Fladu Incident 

x Hydrocarbon Flarin g Incident 

Tail Cgs incident 

CI;TS Incident ID Refy-ZoneB-06-56 

C1RS incident me Zone R Hydrocarbon Flaring Incident 

Incident Date November 25, 2006 

Incident Duration 

Start Date Start Time End Date End Time S02 Tons 

1112512406 07,04 1112712006 09:00 2.08 

SOz Calculation Method: 

Off gay from various sources to LPVR system -- 

Tons of 542 = (F,R)~(TD)*,(Conc, H2S)~`(8.44* 10'S) . 

FR ~ Average flow rate to flaring device during flaring, scflhr 

TD = Total Duration of t7~aring, hours . 

Cono. HaS ; Averagc concentration of H2 S in gas during flaring, sCf H2S/sCf gas 

Tons of 50, = (4011,4)*(49)*(0 .1,254)*(S.44* 1. 0) . 

Tons of S02= 2.08 , Description of Incident: -- 

At approximately 7;04 am on November 25, 2006 the Zone B Low Pressure Vapor Recovery compressor 

fa.iled . The ofl=gas is automatically routed to the flare. Two separate attempts were made to restart the 

compressor. Both times, the compressor started but tripped off after a few xninsrtes. Over the weekend 

two separate call outs were made . Both Machinist and Techorait (I&E) personnel claeckod out the 

compressor -and could rind no rmson for the trips. On Monday (11/'?'7) morning, pitor to having 

maintenance work on the compressor, operations personnel restarted it and it continued to ran, 

Steps Taken to Lirriit the Duration and/or Quantity of S02 Ernisstons: 

Muintenance personnel were called out on off hours to work on the compressor. Several attempts were 

made to restart the compressor, Since there wa5 the potential to caose damage to the compressor by 

c-ontinuling to zestnrt it without knowing the cause, these efforts were discontinued until Monday morning. 

--- 
osiSEP.13.20071 1 :58PMa 4osDEQ/PCD/RWMB ----,--NO. 500_P . 3 . . 

Steps Taken to Limit xlie Duration and/or Quantity of S02 Emissions (cont'd): 

Normally, part of the off gas waaltl have been rerouted thus mirnimizing the guctrztity flared . However, the 

Zone ,A, TGTU wits upset during this period eliminating the ability to reroute part of the off bas. 

I Znvcsfigntlori )rind4ngs ,and Recowmendations: 

Tile investigation was unable to determine the cause of the trip . There were no upsets or alarms in the 

unit or equipment psior to the trip. Neithcr Machinist nor 'pechcraft personnel were able to rind anything. 

The weather had turned coldcr that day which could potentially have contributed to the trip . 

There are no diagnostics, available on the compressor making it much more difficult to determine the 

cause of the trip, 

1 Description of Action Itern 

Develop written procedure for the shut down of die 

LFVR compressor. This shauld include methods of 

minimizing flaring such as re-routing off-gasand 

reducing rates. Train unit operators and operations oncall personnel on the procedure. 

Install si ci'ragnostic system oin the LPVR compressor. 

Mr Yc" 

211/2007, 

21112007 

Infor=tion Required By. Consent De&ee Parsgrqph 79(f) 

In accordance with Paragraph 94, the stipulated penalties untd,4 Subsection J (Paragraphs 84 _ 88) and 

Section hl':1, Subsection I (paragraphs 228 - 23 1) do not apply to Hydrocarbon Flvring Events . For this 

reason, the inf"oxzrnation required by Paragraph 79(f) i5 not included in this report .