1 

### Kelly, Shaheerah
From: Dwight Mallory <Dmallory@resoluteenergy.com> Sent: Tuesday, February 03, 2015 2:41 PM To: Kelly, Shaheerah Cc: Patrick Flynn Subject: McElmo Creek Unit PSD Permit Attachments: Proposed MCU PSD Amendment Permit Appendix A - OM Plan.pdf; Proposed MCU PSD Permit Amendment Appendix B - RCFA.pdf


### Shaheerah, Since we’ve been playing phonetag, I wanted tofollow up with an email and suggestthatwe schedulethe call to discuss the appendicestothe draft PSD permit amendment Friday, February 13th 

### at9:00 am PacificTime. Pat and I are both available. We would also be ableto do a call earlyafternoon. Let me know if9:00 am yourtime works. Also, pleasefeel freeto include anyspecific questionsyou need answersto in your response. Dwight E. Mallory Environmental/Regulatory Manager Resolute Energy Corporation 1700 Lincoln Street, Suite 2800 Denver, CO 80203 Direct: 303-573-4886 X 1165 

### This e‐mail message and anyattachments areforthe sole use ofthe intended recipient(s) and maycontain confidential, privileged, and proprietary information of Resolute EnergyCorporation. Any unauthorized review, use, disclosure or distribution may be prohibited under law. Ifyou are notthe intended recipient, please contactthe sender by reply E
‐ mail ofanyerroneoustransmission, and destroythe original E
‐mail, anyattachments, and all copies ofthe original message. Thankyou.

# APPENDIXA


# MCELMO CREEK UNIT OPERATIONS & MAINTENANCE PLAN

McElmo Creek Unit Oil Production Facility PSD Permit Number:NU05-01

Thisdocument shall apply to and be binding upon the owner(s) and operator(s) of the McElmo Creek Unit Oil Production Facility, includingtheResolute Natural Resources Company

.

## MCELMO CREEK UNIT OPERATIONS & MAINTENANCE PLAN

CONTENTS

I. Process Overview and Operating Procedures II. Routine Monitoring / SurveiUance III. Maintenance Plan IV. Training Program for Plant Operators V. Reference Documentation VI. Appendices I. Life Cycle Maintenance Plan McElmo Compressors HOS 6. HOS 4. ACID GAS A&B 2. Daily Plant Reading Form 3. Isolation and Operating Procedures HOS 6,11054, ACID GAS A&B 4. CompressorTroubleshooting Guide 5. Spare Parts List

- 

### HOS 4 and HOS 6

## Process Overview and Operating Procedures The McElmo Creek Compression Plant serves tertiary recovery operations for the MeElmo Creek Field. The goal ofthe Plant is to receive produced gas through a gathering system, pressure the gas up to a suitable working pressure then re-inject the gas to maintain reservoirpressure. The natural gas is injected with produced water in a dual injection system. Due to varying water injection demands in the field, and to the number ofwells being serviced at any time, the Plant inlet volume can vary between 10 and 18 million standard cubic feet per day (MSCFD). To describe the plant process in more detail, the gas is processed in three main steps: inlet separation, compression and re-injection. Inlet Separation. The inlet separation consists ofan inlet slug receiver which collects free liquids. The gas then passes through filter vessels which collect any incoming solids. Compression. The Plant consists offour high-speed electrically-driven reciprocating compressors which utilize 6300 Brake Horsepower (BHP). Each compressor consists offour stages which raise the pressure ofthe incoming gas from 40 psig to 2900 psig. Each stage has a dedicated aerial cooler and liquid scrubber vessel. On the largest compressor, inter stage dehydration takes place to remove water for corrosion mitigation. Isolation and operating procedures for the Acid Gas A&B and HOS 4 and HOS 6 compressors are included in the appendix to this report. Re-Injection. The four units discharge into a single header, where purchased CO2 is co-mingled to achieve a daily injection goal of24 MSCFD. The gas is then distributed to the field. During Plant upsets, additional CO2 is purchased to meet the daily injection goal. During Plant upsets or compressor downtime events, aportion or all ofthe inlet volume to the Plant is automatically diverted to flare until the problem is 

## corrected. II. Routine Monitoring / Surveillance The plant is manned 24 hours a dayby operators who work 12-hour shifts. The operators make plantrounds each shift, during which key operating parameters of the compressors and supporting equipment are monitored. The following are examples ofthe parameters that are recorded during a shift:

### r Overall Plant inlet and discharge volumes > CO2 purchased volumes > Flared volumes 

### r Discharge pressure > Compressor run times From the Operator’s daily 

### run time report (example attached in appendix to this report), a compressor reliability spreadsheet 

### and flare volume report are updated. The Operators monitor key operating parameters for the compressors to ensure the units 

### are operating within prescribed operating limits based on ExxomMobil andoriginal equipment manufacturer (OEM) standards. Examples ofparameters that the Operators record include:
> Compressor suction and discharge temperatures and pressures > Scrubber liquid levels The detailed parameters that are checked during the shift are included in the maintenance plan and operating procedures included in the appendix to this report. The operators are very familiar with prescribed operating limits, as this is part of theirtraining. Should the operator observe aparameter that is out ofspecification, appropriate corrective action is taken. For example, ifcompressor suction temperature is too low, the operatorwill open cooler louvers to adjust. Ifthe Operator cannot resolve the issue through organized troubleshooting, he then contacts Plant Engineering, Maintenance and Reliability (M&R) Supervisor 

### andlor the contract mechanic to resolve the problem.



## III. Maintenance Plan ExxonMobil utilizes an Equipment Strategies Program (ESP) approach

## to ongoing reliability improvements. The ESP includes the following items: 1. Periodic maintenance that will be performed on the equipment. 2. Predictive maintenance that is to be done on the equipment. 3. Equipment life cycle 4. Overhaul schedule 5. Spare parts inventory

The appendix to this report contains the specific steps in the Life Cycle Maintenance Plan for the McElmo equipment strategy developed for these types ofcompressor units. The ESP is appliedto the compression equipment 

### and the reliability efficiency ofthe compressors is measured. The process consists ofPeriodic Maintenance, Predictive

### Maintenance. Equipment Life Cycle and Overhaul Schedule and the Life Cycle Maintenance Model which describes the various levels within the program and how they are applied. A. Periodic Maintenance (PM’S) Periodic maintenance begins with daily inspections ofthe compressors, which are performed by the Plant Operator. In addition to monitoring process parameters, the following daily equipment checks are made:
> The compressorpiping, inter stage coolers and block valves and compression valves are inspected for fluid leaks > Oil and water levels are monitored > Vibration levels on the motors and compressor 

## frames are monitored > General observations ofphysical conditions (i.e., unusual sounds) ofthe compressor and electric motor are noted. Additional periodic maintenance includes:
> Compressorperformance analysis (Beta) > Lube oil analysis data to determine the condition ofthe electric motor, compressor and all ofthe auxiliary equipment. > Foundations and equipment mounts are checked for cracks and correct make up torque. > Compressor Piping is inspected for external damage > Corrosion coupons are pulled and monitored Annual Inspections involve performing functional tests on the instrument and controls systems. This includes testing safety devices, vibration probes, safety alarms and safety shutdowns. There are PM’s frequencies that extend past a year, such as coolant replacement and lube oil replacement. The predictive maintenance is the tool that is used to decide ifthis work is required. B. Predictive Maintenance Predictive maintenance involves performing detailed inspections for internal wear. The inspections reveal the remaining life ofa compressor component. Some examples ofthe predictive maintenance include inspecting the compressor main bearings, compressor cylinder and piston inspections, electric motor winding/insulation inspection, crankshaft web deflections and electric motor bearing inspection. The results ofpredictive maintenance inspections are recorded, trended and used to determine when the next major maintenance is due.

### C. Equipment Life Cycle and Overhaul Schedule The Equipment Strategy Program assists in determining the life cycle forthe compressors. This life cycle information and the data taken during the predictive maintenance helps us determine when the electric motor and compressor should be overhauled. An overhaul involves opening up the machine and replacing all worn parts with new orrefurbished parts. Overhauls can take up to one month or more to complete. The compressoris restored as much as possible and another life cycle begins. The common practice is to hire additional contract mechanics to perform this work. A normal life cycle for a McElmo compressor is 40,000 hours. This equates to the compressor and electric motor being overhauled about every 5 to 6 years. Overhauls are recorded and all ofthe data and measurements kept on file. These files are kept on site and with the contractor that performed the work.

D. Life Cycle Maintenance Model The section below provides a description ofthe type ofactivities planned for each Level. Note Levels 5 and 6 are subject to the Risk Based Work Selection process priorto committing to the work. The Risk Based Work Selection process is based on earlier and ongoing data obtained and analyzed during the maintenance cycles.
LEVEL 1 OPERATIONS SURVEILLANCE AUTONOMOUS MAINTENANCE Collection and review 

### ofprocess parameters along 

### with routine observationofmachinery operations. 

### LEVEL 2 RUNTIME BASED TESTING PREDICTIVE MAINTENANCE Scheduled collection and monitoring ofboth crankcase lubricant for effects of degradation.
LEVEL 3 CONDITION MONITORING PREDICTIVE MAINTENANCE Scheduled analysis ofthe engine and compressorperformance, vibrationprofile, and energyutilization. LEVEL 4 INTERMEDIATE INTERVENTION PREVENTIVE MAINTENANCE Scheduled drivertune-up and testing !reconditioning ofsafety devices. Minimally invasive, downtime required. LEVELS PREEMINENT INTERVENTION PREVENTIVE MAINTENANCE Scheduled inspection/ reconditioning ofminor wearcomponents inboth the driverand driven equipment. A suite ofmaintenance taskconsiderations and milestone targets that are subjectto Risk Based Work Selectionreviewpriorto execution.
LEVEL 6 ZERO HOUR TURNAROUND PREVENTIVE MAINTENANCE Scheduled overhaul ofdriver and replacement ofmajor wearcomponents. A 

### suite of maintenance taskconsiderations and milestone targets that are subjectto RiskBased Work Selection reviewpriorto execution.

### IV. 

## Training Program for Plant Operators NEW OPERATIONS PERSONNEL

- 

### NO PRIOR MCELMO PLANT EXPERIENCE The plant training fornew operations persons with no prior McElmo Relnjection Plant experience consists ofthe following: Training for one month with another Plant Operator in the Reinjection Plant. Trainee must be scheduled for only day shifts until qualified. Training will be conducted on the following:

• Plant operation, start up, shutdown and emergency procedures

• Surveillance requirements forplant operations personnel

• First line maintenance responsibilities

• Regulatory requirements, such as upset reporting and regulatory documentation

• Required safe work practices, permits and methods used

• Required communication procedures, including handling ofcommunity inquiries

• The Plant Supervisor will evaluate the individual’s performance and is required to approve the trainee forrelease from the training program
• Following the training program the first shifts must be scheduled during day shift

OPERATOR WITH PRIOR PLANT EXPERIENCE 

### (Out ofthe Plant >1 year)

• Ensure all ongoing required training has been completed and reviewed

• Review all procedures, including plant operation, start up, shutdown and emergency procedures

• Work with another Operator for one week during day shift

• The Plant Supervisor will evaluate the individual’s performance and is required to approve the trainee for release from the training program
OPERATOR TRAINING ON CONSENT DECREE Following the effective date ofthe Consent Decree existing operators will be trained on the following sections ofthe Consent Decree. New operators will be trained on these sections as part oftheir overall planttraining while the consent decree is in effect:

• Paragraph 9a

- 

### Emission Limits as itrelates to their duties
• Paragraph 10

- 

### Monitoring as it

### relates to their duties
• Paragraph 11

- 

### Contents ofthe O&M plan as it

### relates to their duties
• Paragraph 12- Root Cause Analysis as it

### relates to their duties
• Paragraph 31

- 

### Right ofEntry as it

### relates to their duties

### V. Reference Documentation The following documentation is readily available at the facility:

> Startup 

### and isolation procedures for each 

### unit (copies included in the appendix ofthis report) > Original Equipment Manufacturer (OEM) maintenance manuals for each unit > Piping 

### and instrument diagrams (P&ID’s) for the plant, updated to reflect DESOP review in May 2003 > Operating limits tables for each compressor, compiled from OEM recommendations and ExxonMobil practices (copies included in the operating procedures in the appendix ofthis report) > All operator log sheets > Compressor Troubleshooting Guide (copies included in the appendix ofthis report)

## VI. Appendices 1. Life Cycle Maintenance Plan McElmo Compressors HOS 6, HOS 4, ACID GAS A&B 2. Daily Plant Reading Form 3. Isolation and Operating Procedures HOS 6. HOS 4, ACID GAS A&B 4. Compressor Troubleshooting Guide 5. Spare Parts List

- 

## HOS 4 and HOS 6

## APPENDIX 1 Life Cycle Maintenance Plan McElmo Compressors HOS 6, HOS 4, ACID GAS A&B

### The following pages describe the Level I tasks performed by the plant operators during each shift. Critical monitoring devices forpressure. temperature, level, 

### and vibration 

### are equipped with High 

### and High High alarms. High alarms 

### warn operators ofa process malfunction allowing operators to troubleshoot the process for operational ormechanical malfunctions. Operational problems are corrected by an operator allowing equipment to continue operating. Mechanical problems that can be easily repaired by the operator 

### are repaired. Mechanical problems that cannot be repaired by the operator 

### are communicated to the supervisor on duty and a decision is made to either shut down thatpiece of equipment orto continue running, depending on the criticality ofthe equipment 

### andlor the severity ofthe malfunction, until repairs 

### can be made. Monitoring frequency ofthe equipment will be increased, again depending on the criticality ofthe equipment orthe severity ofthe malfunction until repairs 

### can be made. High High alarms will automatically shutdown equipment ensuring the safety of personnel, preventing damage to equipment, and minimizing impact on the environment. The supervisor on duty is notified ofa shutdown and a decision is made whetherto repair immediately, depending on day (weekend, weekday), time ofday(night tour or day tour) availability of

### parts and personnel necessary to perform repairs, in order to minimize impact on the environment.Routine Monitoring 

### I Preventative Maintenance Plan EMAINTENANCE PLAN 

## I I HOS6 

### LEVEL I OPERATION SURVEILLANCE

— TASK 

### rAsKDEscR1pT1oN-

- 

### t4k ACTIVITYL’ FREQUENCYjSKILV COMPRESSOR

- 

## Z Li-Ti 1ST SUCTION CHECK 12 HOURS 1 OPERATIONS TEMP & PRESSURE L1-T2 1STDISCHARGE CHECK 12HOURS OPERATIONS TEMP & PRESSURE L1-T3 2ND SUCTION CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T4 2ND DISCHARGE CHECK 12 HOURS OPERATIONS TEMP & PRESSURE Li-T5 3RDSUCTION CHECK 12HOURS OPERATIONS TEMP & PRESSURE L1-T6 3RD DISCHARGE CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T7 4TH SUCTION CHECK 12 HOURS OPERATIONS TEMP& PRESSURE L1-T8 14TH DISCHARGE CHECK 12 HOURS OPERATIONS TEMP& PRESSURE L1-T9 JACKET WATER LEVEL CHECK 12 HOURS OPERATIONS ; LEVEL I Li-Tb JACKET WATER PRESSURE CHECK 12 HOURS OPERATIONS PRESSURE L1-T11 JACKET WATER TEMP IN lOUT CHECK TEMP 12 HOURS OPERATIONS L1-T12 FRAME OIL LEVEL CHECK 12 HOURS OPERATIONS LEVEL L1-T13 COMP OIL PRESSURE CHECK 12 HOURS OPERATIONS PRESSURE L1-T14 LUBE OIL LEVEL UCON

- 1 CHECK 12 HOURS OPERATIONS LEVEL L1-T15 HI/LOLUBEOILPRESSURE(FOR CHECK 12HOURS OPERATIONS CYLINDERS) PRESSURE L1-T16 VIBRATION ON ISTSTAGEWEST/EAST CHECK 12 HOURS OPERATIONS VIBRATION L1-T17 VIBRATION ON 2ND STAGE WEST/EAST CHECK :12 HOURS OPERATIONS ! VIBRATION L1-T18 VIBRATION ON 3RD STAGE CHECK 12 HOURS OPERATIONS 

# ! VIBRATION L1-T19 VIBRATION ON 4TH STAGE CHECK 12 HOURS OPERATIONS : VIBRATION L1-T20 VIBRATION ON MOTOR WEST! EAST CHECK 12 HOURS OPERATIONS (GEARBOX) VIBRATIONL1-T21 VIBRATION ON MOTOR (GEAIBOX) CHECK 12 HOURS OPERATIONS VIBRATION
k 

### SCRUBBERS#4 t’ k L1-T22 1ST/2NDSTAGESCRUBBERS CHECK 12HOURS OPERATIONS LEVEL L1-T23 3RD/4THSTAGESCRUBBERS CHECK 12HOURS OPERATIONS LEVELMAINTENANCE PLAN HOS4 

### LEVEL I OPERATION SURVEILLANCE

- ti-At 

### TASK TASKEDESCRjPTION 

### ACTIVITY FREQUENC’( 

### SKILL!. COMPRESSOR

.- 

# sa Li-TI 1ST SUCTION CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T2 1ST DISCHARGE CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T3 2ND SUCTION CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T4 .2ND DISCHARGE CHECK 12 HOURS OPERATIONS :

. 1EMP& PRESSURE L1-T5 3RDSUCTION CHECK 12HOURS OPERATIONS •TEMP & PRESSURE L1-T6 3RD DISCHARGE CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T7 4TH SUCTION CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T8 4TH DISCHARGE CHECK 12 HOURS OPERATIONS TEMP & PRESSURE L1-T9 JACKET WATER LEVEL CHECK 12 HOURS OPERATIONS LEVEL LI-Tb JACKET WATER PRESSURE CHECK 12 HOURS OPERATIONS PRESSURE Li-Ti 1 JACKET WATER TEMP IN / OUT CHECK TEMP 12 HOURS OPERATIONS L1-T12 FRAME OIL LEVEL CHECK 12 HOURS OPERATIONS LEVEL L1-T13 COMP OIL PRESSURE (OFF CONTROL CHECK 12 HOURS OPERATIONS PANEL) PRESSURE Li-T14 LUBE OIL LEVEL UCON

- 1 CHECK 12 HOURS OPERATIONS LEVEL L1-T15 HI/LO LUBE OIL PRESSURE (FOR CHECK 12 HOURS OPERATIONS CYLINDERS) L1-T16 AFTERCOOLER FAN ON HI / LO CHECK TEMP 12 HOURS OPERATIONS Li-T17 VIBRATION ON MOTOR NW & SW CHECK 12 HOURS OPERATIONS VIBRATION Li-Tb 8 VIBRATION ON MOTOR NE & SE CHECK 12 HOURS OPERATIONS VIBRATION L1-T19 VIBRATION ON 1ST/2ND STAGE CHECK 12 HOURS OPERATIONS VIBRATION L1-T20 [VIBRATION ON 3RD / 4TH STAGE CHECK 12 HOURS OPERATIONS VIBRATIONL1-T21 VIBRATION ON COMPRESSOR WEST CHECK 12 HOURS OPERATIONS VIBRATION 

### SCRUBBERS L1-T22 1ST/2NDSTAGESCRUBBERS CHECK 12HOURS OPERATIONS LEVEL L1-T23 3RD/4THSTAGESCRUBBERS CHECK 12HOURS OPERATIONS LEVELU)zU)20HUIa0U)20HLUci0U)20H4UIa0U)20HUIa0 t0U)20Hwa0U)20HUIa0U)20HUIa0UiILU) z0HUIa0U)z0H4Liia0U)D0I@4r(I)20H4wa0U)D03D(NU)20HUIa0Cl)z0HUIa0Cd)D03:@4U) zU)2U)D03:@4U)2U)D03:(NU)2C’)D0I@4pU)ctD0r@4U)D03:@4UIDU)U)UIftCaOHU)D0:3:eqwDC,,U)UIaU)D0IeqoaUI1wOHU)0I@4On1wOHUIDU)C’)UIaU)D0I@4OnUJ1wOHU)D0I@4wOaU)wwrwrOHaU)D0I@4UIsco8oaU)UIUIIUIOHaU)D0I(‘4UIDCd)U)UIccaU)D0I(NoaUJ1wOHUIItst:QooacnW2WIwItOHaU)ItD0IeqUIDCDU)U)UIIta0UII0aUIUIUiItItXLiiDDDrU)U)JU)S11UIOCOOUIOCOOWOCOOOwow>www>www>UIwwUI>W>wIItIwIItIwIItIIwIwoaooaoion-oO..JO.Jz0 IUiC-)-J-IUi0 a I0Co20C-)z0F0DU)HU)UI(9It4IC—)U)HU)CzUIIIIt02-JLii>UI-JItUI>2HUI40-,U)20H0DU)C2(NU)4(9C04C244U)4(9C04UI(9It4I0U)CC2@4-J0ccH20C-)LiU0UIa::0U)U)wIta-J0a0020H00(-I)CItC,,UI(9It4I0U)CCccC,,2aUI024zUII24UIcc0U)U)UIItaItUIH4Hw0420HC)0U)3DHIt0LIUIIt0U)U)wIta-J0UI—-JUI(9It4I0U)CIH2-JUi-J0-J3:2024UItUI-J00C-)ccUIHLL42000-JUI>UI-J-J0UIm0-J:4.U)ItUI0It0U)UI(34HU)C2(NHU)-JUI>UI-J-J0UIU)ccUI0It0U)UI(34HU)IHCItC,, F;-JeqC,,F-JUI24aF-JtoI-:-JCi,F-jF—F-J

F;-JC) F;-J0F-J F;-J(N F;-JC,,F;-JU, F;-JCD F;-JF—F;-J

### NOTE LEVELS 2 THROUGH 6 ARE THE SAME FORALL COMPRESSORS

LEVEL 2tIrsaVicIMEBASEDTESTING (**R- 

# 1n TASK $TASKDESCRIPTION .ACTIVITY FREQIJENCV1SKIP L2-T1 LUBE OIL ANALYSIS TEST 740 HOURS MECHANICAL L2-T2 JACKET WATER ANALYSIS TEST 4000 HOURS MECHANICAL



### LEVEL3 CONDITIONMONITORING TASK TASKDESCRIPTION ACTIVITY FREQUENCY L3-T1 MOTOR-COMPRESSOR PERFORMANCE ANALYZE QUARTERLY MECHANICAL ANALYSIS L3-T2 HORSE POWER UTILIZATION RATIO ANALYZE QUARTERLY MECHANICAL L3-T3 VIBRATION COMPRESSOR DRIVE ANALYZE QUARTERLY MECHANICAL MOTOR BEARINGS L3-T4 VIBRATION PRE 

### I POST LUBE OIL PUMP ANALYZE QUARTERLY MECHANICAL L3-T5 LOOSE FOUNDATION FASTENERS / VISUAL QUARTERLY MECHANICAL CHOCKS INSPECTION L3-T6 PRESSURE CASE VENT PIPING VISUAL QUARTERLY MECHANICAL INSPECTION L3-T7 COMPRESSOR JACKET WATER PIPING VISUAL QUARTERLY MECHANICAL INSPECTION

### LEVEL 4 INTERMEDIATEINTERVENTION TASKSS.g TASIDESGRJPTION • %t4t ACTiVITY 

### FREQUENC.* 

### SKILI*L L4-T1 COMPRESSOR CRITICAL SAFETY TEST QUARTERLY INSTRUMENT DEVICES L4-T2 MOTOR BEARING GREASE LUBRICATE QUARTERLY MECHANCIAL L4-T3 CRANKCASE AND DRIVE TRAIN VISUAL QUARTERLY MECHANICAL INSPECTION L4-T4 JACKET WATER-LUBE OIL COOLER REPLACE QUARTERLY MECI-iANLCAL BANK_FAN_BELT L4-T5 LUBE OIL FILTERS REPLACE REPLACE AS MECHANICAL NEEDED I PER ANALYSIS L4-T6 CRANKCASE LUBE OIL REPLACE REPLACE AS MECHANICAL NEEDED PER ANALYSIS L4-T7 CRANKCASE LUBE OIL SUMP CLEAN AS NEEDED MECHANICAL PER ANALYSIS L4-T8 CRANKCASE LUBE OIL FEED LINES VISUAL AS NEEDED MECHANICAL INSPECTION L4-T9 JACKET WATER-LUBE OIL COOLER CLEAN AS NEEDED MECHANICAL BANK (EXTERNAL) L4-T1O GAS COMPRESSOR ROD (SCORING) VISUAL ANNUAL MECHANICAL INSPECTION L4-T1 1 ‘GAS COMPRESSOR PACKING CASE VISUAL ANNUAL [MECHANICAL (ROD CENTERING) ‘INSPECTION L4-T12 GAS COMPRESSOR WIPER PACKING VISUAL ANNUAL MECHANICAL (LEAKAGE) INSPECTION L4-T13 GAS COMPRESSOR PACKING CASE VISUAL ANNUAL MECHANICAL (LUBE CONNECTIONS) INSPECTION L4-T14 CROSSHEAD SHOE CLEARANCE CHECK & ANNUAL MECHANICAL RECORD L4-T15 TORQUE COMPRESSOR CRANK FRAME CHECK & ANNUAL MECHANICAL FOUNDATION FASTENERS RECORD L4-T16 TORQUE COMPRESSOR CYLINDER CHECK & ANNUAL MECHANICAL DISTANCE PIECE FASTENERS RECORD L4-T17 TORQUE CRITICAL CRANKCASE CHECK & ANNUAL MECHANICAL FASTENERS RECORD L4-T18 GAS COMPRESSOR ROD RUNOUT CHECK & ANNUAL MECHANICAL RECORD L4-T19 MOTOR WINDING POLARIZATION INDEX TEST& 250O0 VENDOR RECORD HOURS SERVICE L4-T20 MOTOR LEAD CONNECTIONS INSPECT & 25000 VENDOR TORQUE HOURS SERVICE L4-T21 MOTOR CONTACTOR TEST & 25000 VENDOR INSPECT HOURS SERVICELEVEL 4 INTERMEDIATE INTERVENTION :

, te4J:: TASK: 

### TASKOESCRIPTION: 7 

### ACTJVITYa% REQUENC S$JrflfiJCZJ L4-T22 MOTOR CONTACTOR BUS STAB INSPECT & 25000 VENDOR LUBRICATE HOURS SERVICE L4-T23 SUPERVISORY RELAYS CALIBRATE & 25000 VENDOR INSPECT HOURS SERVICE L4-T24 MOTOR GROUND WIRE! CONNECTIONS INSPECT & 25000 MECHANICAL TORQUE HOURS

LEVEL 5 PREEMINENTINTERVENTION. TASK TASIQDESCRIPTION
‘ 1ACTIVIrnt4! 

### IFREQUENG4jSKIPIr L5T1 MAIN BEARING CLEARANCE CHECK & 36000 MECHANICAL RECORD HOURS L5-T2 CONNECTING ROD BEARING CHECK & 36000 MECHANICAL CLEARANCE RECORD HOURS L5-T3 CROSSHEAD PIN CLEARANCE CHECK & 36000 MECHANICAL RECORD HOURS L5-T4 GAS COMPRESSOR ROD PRESSURE INSPECT & 36000 MECHANICAL PACKING CASE RECONDITION HOURS L5-T5 GAS COMPRESSOR WIPER PACKING INSPECT & 36000 MECHANICAL RECONDITION HOURS L5-T6 GAS COMPRESSOR ROD PROFILE CHECK & 36000 MECHANICAL RECORD HOURS L5-T7 PROFILE COMPRESSOR CYLINDER CHECK & ‘36000 MECHANICAL LINER RECORD HOURS L5-T8 COMPRESSOR VALVES AND CAGES INSPECT & 36000 MECHANICAL RECONDITION HOURS L5-T9 FORCE FEED LUBRICATOR SYSTEM INSPECT & 36000 MECHANICAL SERVICE HOURS L5-T10 CRANKCASE RELIEF DOORS RECONDITION 36000 MECHANCIAL HOURS L5-T1 I COMPRESSOR ROD RUNOUT CHECK & 36000 MECHANICAL RECORD HOURS L5-T12 CRANKSHAFT WEB DEFLECTION CHECK & 36000 MECHANICAL RECORD HOURS L5-T13 DRIVE MOTOR BASE BOLT TORQUE CHECK & 36000 ‘MECHANICAL

__________ RECORD HOURS L5-T14 CRANKSHAFT THRUST BEARING CHECK & 36000 MECHANICAL

‘ RECORD HOURS L5-T15 GAS COMPRESSOR PISTON, ROD, WEIGHT & 36000 MECHANICAL NUT (BALANCE) RECORD HOURS L5-T16 MOTOR DRIVE COUPLING CHECK & 36000 MECHANICAL RECORD HOURS

# I LEVEL 6;* ZERHOURIOVERHAUL 

### LTASK .1TASKZDESCRIPTION AaIvnv,.> 

### FREQUENCY’ SKILL IL6T1 MAIN BEARINGS REPLACE 72000 MECHANICAL HOURS L6-T2 CONNECTING ROD BEARINGS REPLACE 72000 MECHANICAL HOURS L6-T3 CONNECTING ROD BUSHINGS REPLACE 72000 VENDOR HOURS SERVICE L6-T4 CROSSHEAD PIN INSPECT 72000 MECHANICAL HOURS L6-T5 CROSSHEAD SHOES INSPECT 72000 MECHANICAL HOURS L6-T6 JACKET WATER PUMP RECONDITION 72000 MECHANICAL HOURS L6-T7 MAIN OIL PUMP RECONDITION 72000 VENDOR HOURS SERVICE L6-T8 CRANKSHAFT OIL SEAL REPLACE 72000 MECHANICAL HOURS L6-T9 MAIN LUBE OIL PUMP COUPLING INSPECT 72000 MECHANICAL HOURS LB-Tb CRANKSHAFT THRUST BEARING CHECK 72000 MECHANICAL HOURS LB-Tb I OIL THERMOSTAT ELEMENTS CHECK 72000 MECHANICAL

. HOURS L6-T12 JACKET WATER THERMOSTAT REPLACE 72000 MECHANICAL ELEMENTS HOURS I L6-T1 3 GAS COMPRESSOR VALVE COVER INSPECT 72000 MECHANICAL STUDS HOURS L6-T14 GAS COMPRESSOR HEAD STUDS INSPECT 72000 MECHANICAL HOURS

## APPENDIX 2 Daily Plant Reading Form

# EzinWEl-ftráncr & 

# H

. NAME: 

### DATE: I 

### DATEREPORTING FOR:

yB PD72 Dji 4245 (HOSS-6) 4246 (AG.C-A) 4247(AGC.-B) 4249 (HOSS-4}
McuCO2’ruRcAsssMkT,Mothy2zi4l,ii* TODAY’S Readings YESTERDA I’S Readings TOTAL TOTAL COMPRESSOR VOL

— TOTAL INJECTION 

## 4 DISCHARGE PRESSURE

YESTERDAY’S Readings (Øfl#J&arkrowq..,,. TODAY’S Readings

P3201 YESTERDA I’S P-9202 YESTERDA Y’S CUMUL4TIVE FLOW CUMULATIVE FLOW
YESTERDArSI’Boosw,stafion) TODAY’S t’BooSTaSWUOn) TOTAL MAKE UP TOTAL PRODUCED

MAKE UP READING MAKE UP READING F&’tr -J’a,

YESTERDAI’S TODAY’S TOTAL RUNTJME RUNTIME P-9201 RUNTIME P-9201 P-9201

YESTERDAY’S TODAY’S TOTAL RUNTIME DISCHARGE RUNTIME P-9202 RUNTIME P-9202 P-9202 PRESSURE HEADER PRESSURE

## APPENDIX 3 Isolation and Operating Procedures for: HOS 6, HOS 4, ACID GAS A&BExxonMobil Production Isolation Procedure

- File Name I-IOS6ISO Aneth Operations HOS$ COMPRESSOR Authorized McElmo CreekUnit ISOLATION PROCEDURE Page 1 of4 Gas Reinjecuon Facility Equipment. # CM-12W

SCOPE This procedure describes the isolation, depressurization and returning of the HOS-6 Compressor back to service.

REQUIREMENTS None

APPLICABLE HOS-6 Compressor Opearting Procedure DOCUMENTS Pre-Start Safety Review Checklist (See Attachment)

SPECIAL None EQUIPMENT

ENVIRONMENTAL For environmental concerns, contact the Field Foreman and the Operations Compliance Technician.

SAFETY Locks must be used by Operations and Maintenance Personal For applicable safety requirements, refer to the ExxonMoibl Production Safety Manual and Material Safety Data Sheets (MSDS). Care must be taken to completely depressure the compressor which may contain explosive or sour gas.

Safety devices taken out of service or being returned to service MUST be logged in the Critical Safety Device (CSD) log book in the Control Room.Isolate the compressor for maintenance. NOTE Refer to the HOS-6 Operating procedure for requirements to shutdown the compressor. This procedure is for total compressor isolation. Dependant upon the maintenance work required, specific cylinders or utilities may be isolated separately, while leaving the remaining cylinders or utilities in service. 1.1 Ensure that the pre-lube oil pump is not running. 1 .2 De-energize the electrical breaker for the motor in the MCC building. 1.3 Close the 4th stage discharge isolation block valve. 1 .4 Close the 3rd stage suction valve downstream ofthe Glycol Contactor. 1.5 Close the 4th stage intercooler discharge block valve. 1.6 Close the 1st stage suction isolation block valves 

## ( SDC-1 700)

• Change setpoint to zero on DCS PCV-1 700, 1.7 Close all isolation block valves on the PSV’s rack for the (1st, 2nd, 3rd and 4th stages,etc) 1.6 Close the isolation block valve on the 1st Stage Suction Scrubber. 1.9 Close all isolation block valves for the closed drain 1.10 Close all isolation block valve for the open drain. 1.11 Place the H2S and LEL Detection system in the “calibration” mode in the Control Room. NOTE While the 1125 and LEL Detection system is in the “calibration” mode, the sensors are still active and MUST be monitored from the Control Room. Tag it with Pink BYPASS tag and Log in the LOG BOOK. Isolation Procedure ExxonMobii Production I File Name HDS6ISO Aneth Operations HOS-6 COMPRESSOR Authorized MeElmo Creek Umt ISOLATION PROCEDURE Pane 2 of4 Gas Reinjecuon Facilit 3

’ Equipment. CM-1210 

# j All valves, switches and breakers referenced in this procedure 

### MUST BE LOCKED AND 

### TAGGED per the Lock-out I Tag-out guidelines. 

# I I

# n Isolation Procedure ExxonMobil Production 

## I File Name HOS6ISO Aneth Operations HOS-6 COMPRESSOR Authorized MeElmo CreekUnit ISOLATION PROCEDURE Page 3 of4 Gas Reinjection Facility Equipment. # CM-1210

2. Depressurize the compressor for maintenance. 

# Ii WARNING Atmospheric vents will release process gas that contains LEL and H2S. 

# ii

2.1 Open the blowdown valves on all stages to the Flare header to depressure the compressor. 2.2 Close the blowdown valves on all stages to the Flare header. 2.3 Open the atmospheric vent valves on all 4 cylinder stages to verify depressurization. 2.4 Open the cylinder head and crank end vent valves to verify that the cylinders to be worked on are depressured. 2.5 Notify maintenance that they may begin their work. 3. Pressure check compressor.
WARNING Make sure all maintenance work is completed before returning the compressor to service.

3.1. Pressure check compressor with process gas. 3.1.1 Close the atmospheric vent valves on all 4 cylinder stages. 3.1.2 Open all isolation block valves on the PSV’s for the (1 st, 2nd, 3rd and 4th stages,etc.) 3.1.3 Open all isolation block valve for the closed drain. 3.1.4 Open all isolation block valve for the open drain.
WARNING Make sure atmospheric vents are closed before pressurizing compressor with process gas.
3.1.5 Open the 4th stage discharge isolation block valve. 3.1.6 Open the 3rd stage suction valve downstream ofthe Glycol Contactor. 3.1.7 Open the 4th stage intercooler discharge block valve. 3.1.8 Open the 1st stage suction isolation block valves (PCV-1 700, SDV-1 700).ExxonMobil Production Isolation Procedure File Name HOS6ISO Aneth Operations HOS-6 COMPRESSOR Authorized McElmo CreekUnit ISOLATION PROCEDURE Page 4 of4 Gas Reinjection Facility ________________________________________________

Egwpment. CM-l210

3.1.9 Verify pressures across compressor. 3.1.10 Verify that no teaks are detected on all items worked. 4. Return compressor to service. 4.1. Refer to the HOS-6 Operating procedure for requirements on returning the compressor back into serviceExxomMobi( Production 

# [ Operating Procedure File Name HOSCCOMP 

### i Aneth Operations HOS-6 COMPRESSOR Authorized

-

McEImo Creek Unit I OPERATING PROCEDURE Page 1 of 10 Gas Reinjection Facility I Equipment. CM-1210 I

SCOPE This procedure describes the startup and shutdown ofthe HOS-6 compressor. Applicable steps are initial startup, normal startup, normal operation, temporary operation, emergency operation, normal shutdown, Emergency Shutdown (ESD), safety shutdown, problems and solutions, and operating limits.

REQUIREMENTS None

APPLICABLE HOS-6 Compressor Isolation Procedure DOCUMENTS

SPECIAL None EQUIPMENT

ENVIRONMENTAL For environmental concerns, contact the Field Foreman and the Operations Compliance Technician.

SAFETY For applicable safety requirements, refer to the ExxonMobil Production Safety Manual and Material Safety Data Sheets (MSDS).ExxonMobil Production Operating Procedure File Name HOS6COMP Aneth Operations HOS-6 COMPRESSOR Authorized McElmo Creek Unit OPERATING PROCEDURE Page 2 of 10 Gas Reinjecton Facility _____________________________________________

Equipment. CM- 1210

Initial Startup. 

# j NOTE Initial startup is performed following an extended compressor shutdown cue to

‘ maintenance or turnaround. 1.1. Check that the compressor is ready for start. 

# Li Maintenance work complete Temporary blinds removed and equipment restored 

# J Oxygen purged frorn compressor and piping 

# Li Compressor and piping pressure checked using process gas 

# U Compress& piping rechecked for leaks 

# Li Compressor isolation valves returned to service 

# Li Safety devices, vents, and PRVs returned to service 

# J Instruments, controls, and electrical power returned to service 

# Li Lock-out/Tag-out rernoved 1.2. Start compressor using normal startup procedure. 2. Normal Startup. NOTE Normal startup is performed following a brief compressor shutdown due or following an extended shutdown after performing the initial startup checks. 2.1. Prepare the compressor for start. 2.1.1. Check compressor is ready for start. 

# Li Plant ESD and local panel shutdowns are reset 

# J Verify that the LEL, H2S and Fire systerns are in normal operation 

# Li Motor electrical breaker is reset and in service in the MCC building 

# Li Control panel power on 

# Li Control panel lights working 

# Li Crankcase oil level okay 

# Li Lubricator oil reservoir level okayEnsure that the manual block valves on the 1st stage suction and 4th stage discharge lines are in the open position 

# J Ensure that all kiene valves and bleeder valves are closed 

# Li The 1st Stage Suction Pressure Controller (PIC-1700) resets automatically to 10.4% Start and load compressor, CAUTION The compressor should not have more than 10 psi 9 on the 1st stage suction. Depressure as needed to prevent overloading the compressor motor. 2.2.1 Start the pre-lube oil pump. 

# ( NOTE The pre-lube oil pump switch is located at the southwest corner ofthe compressor skid. 2.2.2 Start the 1st, 2nd, 3rd and 4th stage cooler fans. 2.2.3 Start the lube oil cooler fans. 2.2.4 Start thejacket water cooler fans. 2.2.5 Stan thejacket water pump. 2.2.6 Press the Nredn electrical reset button by Control Panel 2.2.7 Turn the bypass timer clockwise to 5 minutes. NOTE Allow the indicators to sequence to “green.” The indicators that are bypassed by the timer will not sequence until after startup and the first indicator in the series clears. 2.2.8 Verify discharge valve is open on the 4th stage discharge
WARNING Ifthe panel indicator does not rotate from “clear” to “red” indicating that the 

# I discharge valve is open, visually inspect the valve position to ensure it is opened, ExxonMobil Production Operatmg Procedure File Name HOS6cO 1 McEhno Creek Umt OPEIt4TING PROCEDURE Page 3 of 10 Aneth Operanons HOS-6 COMPRESSOR Authorized Gas Reinjection Facility Equipment. # CM-12 10


# J Jacket water level okay Visually verify that all Suction scrubbers are empty 

# J Ensure that the compressor is depressurized 

# Li

2.2ExxonMobil Production Operatmg Proceduie File Name HOS6COMP Aneth Operations HOS-6 COMPRESSOR Authorized McElmo Creek Umt OPERATING PROCEDURE Page 4 of 10 Gas Reinjection Facilit Equipment. 4 CM-1210


## Warning: Ensure that all personnel are clear and free ofthe electrical power supply system components immediately prior to starting motor. In particular do not stand in front of motor starter, near motor transformer or under aerial fuses. A minimum distance of 25 feet should be maintained for unqualified personnel. Rationale: Across the line motor starting creates approximately 6X full load current. Consequently the electrical system is stressed during starting and the probability of failure is greater. 2.2.9 Press and hold the ‘green” start button and the “Lube” pump will run for 1 minute before the compressor starts. CAUTION After 2 unsuccessful starts; the compressor motor starter will trip a time delay in the MCC building and prevent you from restarting the compressor. Verify the time delay duration in the MCC building. 2.2.10 Verify that the compressor oil pressure is above 45 psig. 2.2.11 When the compressor starts ups, the suction valve should open automatically and the indicator will show open. 2.2.12 Close the 2nd stage discharge to flare valve (PCV-1 746). CAUTION Ensure that the Contactor back pressure control valve (PCV-1 637) is open before you begin to close the 3rd stage discharge to flare pressure controller (PlC-I747). 2.2.13 Close the 3rd stage discharge to flare valve (PCV-1 747). 2.2.14 The 1st Stage Suction Pressure Controller (PIC-1700) in the “auto” mode with a setpoint 15 psig on the Rosemont OCS. 2.2.15 Reset the bypass timer back to zero. 2.2.16 Start the glycol pumps and place the Dehydration system in service. 3. Normal Operation. 3.1. See tables at end ofprocedure for normal operating parameters. (Page 9 of 10) 3.2. Perform daily rounds, including but not limited to the items below:

• Troubleshoot, acknowledge, reset, and clear compressor alarms

• Check compressor normal operating parameters

• Suction and discharge pressures

• Suction and discharge temperatures

• Cylinder temperaturesExxonMobil Production Operating Procedure File Name FIOS6CDMP Aneth Operanons l-Ios-6 COMPRESSOR Authorized McElmo Creek Umt OPERATING PROCEDURE Page 5 of 10 Gas Renijection Facility Equipment. 4 CM-1210

• Cylinder vibration

• Motor Vibration

• Crankcase and lubricator lube oil pressure

• Crankcase and lubricator lube oil temperature

• Crankcase lube oil filter dp, and change as necessary

• Crankcase oil level

• Oil consumption

• Lubricator oil level

• Jacket water pressure

• Jacket water temperature

• Check compressor crankcase and lubricator lube oil level and fill as needed

• Check pulsating bottle supports

• Check vibration and temperature monitors

• Clean oil off skid and foundation

• Check packing vent temperatures

• Check crankcase pressure

• Check all gauges

• Check for lose bolting

• Check Jacket water tank level and fill as needed

• Check Jacket water pump and cooler fans for proper operation

• Check suction scrubber levels and drain manually if needed

• Drain suction and discharge pulsating bottles

• Check distance piece purge or vent system



### • Check interstage cooler delta pressure and temperature

• Check motor bearing oil sump level and sight level condition

• General housekeeping dutiesExxonMobil Procjucnon Operatmg Procedure File Name HOS6COMP Aneth Operations I-iOs-6 COMPRESSOR Authothed McElmo Creek Unit OPERATING PROCEDURE Page 6 0110 Gas Reinjecuon Facility Equipment. # CM-1210

• Check compressor aftercooler fans operation 4. Temporary Operation. NOTE Use oftemporary operating procedures must be approved by the Field foreman. 4.1. Document any temporary procedure changes with a Management of Change (MOC) work order, and a procedure revision request form. 4.2 Follow up on temporary procedures when the system is returned to normal operation or when a temporary procedure becomes permanent. Complete all documentation required. 5. Emergency Operation. 5.1. Refer to Emergency Response Plan for emergency response instructions. 6. Normal Shutdown. NOTE Normal shutdown is usually done for compressor maintenance or when inlet gas rates decrease. Control Room operator will coordinate any normal shutdown. 6.1. Shut down compressor. 6.2.1. Press the Motor stop button. 6.2.2 Ensure suction valve is closed since this valve closes automatically. 6.2.3 Open the 3rd stage discharge to flare valve (PCV-1 747). 6.2.4 Open the 2nd stage discharge to flare valve at (PCV-1 746). NOTE Turn offthe associated pumps and cooler fans ifthe compressor will be down for an extended period. 7. Emergency Shutdown (ESD) NOTE ESD ofthe Gas Reinjection Facility can be initiated from any ofthe 7 pull stations located throughout the facility or from 1 push button station located in the Control Room. The Fire, H2S and LEE. detection systems will also initiate an ESD. Both systems will shutdown all the reinjection compressors, isolate the inlet area and depressure the facility.

NOTE The ESD pull stations located throughout the facility are easily identified by the red and white stripes painted on the building or pipe rack support beams. 7.1. Reinjection Facility ESD: 7.1.1. ESD Station One push button station is located inside the Control Room above the Fire, H2S and LEE. Detection System’s readout panel and a pull station is located on the southeast wall inside the MCC building (beside the Control Room).ExxonMobjj Production Operatmg Procedure File Name HOS6COMP Aneth Operations [[OS-a COMPRESSOR Authorized McElmo Creek Unit OPERATING PROCEDURE Page 7 of 10 Gas Remjecuon Facility Equipment. # CM-1210

7.1.2. ESD Station Located on a pipe rack support beam on the southeast corner ofthe Acid Gas compressor building. 7.1.3. ESD Station Located outside between the Control Room and the MCC building. 7.14. ESD Station Located on the north wail outside of the Inlet Area’s Air Compressor building. 7.1.5. ESD Station Located on a building support beam on the northwest corner ofthe HOS-6 Compressor building. 7.1.6. ESD Station: Located on a building support beam on the northwest corner of the HOS-4 Compressor building. 7.1.7. ESD Station: Located on cooler fan support beam on the southeast corner of the HOS-4 Compressor’s Cooler Fan bay. 7.2 Fire, H2S and LEL Detection Systems ESD: 7.2.1. Fire: There are 10 Fire Detection sensors located throughout the facility. Any detection by either ofthese sensors will initiate an audible alarm and a shutdown of all reinjection compressors, isolate the inlet area and depressure the facility. 7.2.2. H25: There are 23 H2S Detection sensors located throughout the facility. Any detection by either of these sensors at 10 PPM H23 will initiate an audible alarm and illuminate a “blue” beacon light. Any detection by either ofthese sensors at 50 PPM H2S will initiate an audible alarm, illuminate a “blue” beacon light and shutdown all reinjection compressors, isolate the inlet area and depressure the facility 7.2.3. LEL: There are 8 LEL Detection sensors located throughout the facility. Any detection by either ofthese sensors at 30 % LEL will initiate an audible alarm. Any detection by either of these sensors at 50 % LEL will initiate an audible alarm and shutdown all reinjection compressors, isolate the inlet area and depressure the facility 7.3 HOS-6 Compressor ESD. 7.3.1 Local ESD. Trip individual compressor ESD by pressing ‘Stop’ button on 

### local control panel to shut down that compressor only.

8. Safety Shutdown. 8.1 Any condition below causes a safety shutdown ofthe compressor:ExxonMobil Production Operating Procedure File Name HQS6COMP Aneth Operations HOS-6 COMPRESSOR Authorized McElmo Creek Unit OPERATING PROCEDURE Page 8 of 10 Gas Reinjection Facility Equipment. 4 CM-1210

• Plant ESD

• Fire! H2S, and LEL Detection systems

• Low instrument air pressure

• Electrical power failure

• Low discharge pressure

• Low pressure suction

• High discharge pressure on either ofthe 2nd or 4th stage cylinders

• High level in either of the 1st, 2nd, 3rd or 4th stage suction scrubbers

• Low pressure suction on either of the 2nd, 3rd or 4th stage

• Low compressor oil pressure

• Low compressor oH level

• No flow compressor cylinder oil

• Low pressure Jacket Water

• Cooler failure

• Vibration Compressor

• Compressor manual shutdown 8.3. See critical operating limits tab’es at end ofprocedure for safety shutdown trip points. 9. Problems and Solutions. 

# I NOTE Refer to the Compressor Troubleshooting guide located in the Control Room. 

# IExxonMobil Production Operating Procedure File Name HOS6COMP Aneth Operanons HOS-6 COMPRESSOR Authorized McElmo Creek Umt OPERATING PROCEDURE 

### I Page 9 of 10 Gas Reinjection Facility Equipment. 4 CM-1210

10. Operating Limits.
10.1. Shutdown resets: Local Shutdown Resets and Permissive Tag Description Position Setpoint Reinjection Plant Total Reinjection Plant ESD Reset N/A ESD Fire Detection Fire Detection Reset N/A H2S Detection H2S Detection Reset 50 PPM LEL Detection LEL Detection Reset 50 %

Remote Shutdown Resets Tag Description Position Setpoint __Manual_Shutdown Local panel shutdown Reset N/A
10.2. Normal operating parameters:
NOTE The following parameters are only guidelines. Certain conditions may call for you to operate outside them.ExxonMobii Production Operating Procedure File Name HOS6COMP Aneth Operations BOS-6 COMPRESSOR Authorized McElmo Creek Unit OPERATING PROCEDURE Page 10 of 10 Gas Reinjection Facility I________________________________________________ Equipment. CM-I210

HOS-6 Compressor Normal Operating Parameters Description Operating Range Crankcase Oil Pressure 50 to 65 psig Crankcase Oil Temperature 150 to 170°F Oil Filter Differential Pressure 0 to 5 psig

Jacket Water Temperature 100 to 110°F Jacket Water Temperature Change 10 °F i Stage Suction Temperature 45 to 100 degrees F 1 st Stage Discharge Temperature 250 to 280 degrees F 2 Stage Suction Temperature 80 to 110 degrees F 2’ Stage Discharge Temperature 250 to 250 degrees F

3’° Stage Suction Temperature 100 to 120 degrees F 3 rd Stage Discharge Temperature 250 to 280 degrees F

4 Stage Suction Temperature 100 to 120 degrees F 4tfl Stage Discharge Temperature 240 to 280 degrees F i’ Stage Suction Pressure 14 to 16 psig i’ Stage Discharge Pressure 95 to 105 psig

2 Stage Suction Pressure I 90 to 105 psig 2 0d Stage Discharge Pressure 370 to 380 psig

3(0 Stage Suction Pressure 350 to 380 psig 3 1d Stage Discharge Pressure 1000 to 1050 psig

4fl Stage Suction Pressure 1000 to 1040 psig 4 tfl Stage Discharge Pressure 2750 to 2950 psig

151 Stage Vibration (Cyl #1) 0.38 to 0.40 in/s 1 Stage Vibration (Cyl #3) 0.36 to 0.40 in/s 2° Stage Vibration (Cyl #2) 0.38 to 0.44 in/s 2 Stage Vibration (Cyl #4) 0.38 to 0.44 in/s 3(0 Stage Vibration (Cyl #5) 0.34 to 0.38 in/s 4U1 Stage Vibration (C #6) 0.35 to 0.40 in/s Motor Vibration (Al Bearings) 2.0 to 3.0 in/sExxonMobif Production Isolation Procedure FLIC Name HOS4ISO Aneth Operations McElmo Creek Unit HOS- 4 COMPRESSOR ISOLATION Authorized Page lofJ Gas Remjection Facility Equipment. # CM-3400

SCOPE This procedure describes the isolation, depressurization and returning ofthe HOS-4 Compressor back to service.

REQUIREMENTS None

APPLICABLE HOS-4 Compressor Operating Procedure DOCUMENTS Pre-Start Safety Review Checklist

SPECIAL None EQUIPMENT

ENVIRONMENTAL For environmental concerns, contact the Field Foreman and the Operations Compliance Technician.

SAFETY Locks must be used by Operations and Maintenance Personal (Two Sets) For applicable safety requirements, refer to the ExxonMobil Production Safety Manual and Material Safety Data Sheets (MSDS). Care must be taken to completely depressure the compressor which may contain explosive or sour gas.

Safety devices taken out of service or being returned to service MUST be logged in the Critical Safety Device (CSD) log book in the Control Room.WARNING All valves, switches and breakers referenced in this procedure MUST BE LOCKED AND TAGGED per the Lock-out 

### I Tag-out guidelines.

1. Isolate the compressor for maintenance. NOTE Refer to the HOS-4 Operating procedure for requirements to shutdown the compressor. 1.1 Ensure that the lube oil pump is not running. 1 .2 De-energize the electrical breaker for the motor in the MCC building. 1.3 Place the local control panel power switch in the “off’ position. 1.4 Close the 4th stage discharge isolation block valve. 1.5 Close the 1st stage suction isolation block valve. 1.6 Close the isolation block valves for the closed drain 1.7 Close the isolation block valve for the open drain. 1.8 Place the H2S and LEL Detection system in the ucalibrationK mode in the Control Room. [iiãThE While the H25 and LEL Detection system is in the calibration M mode, the sensors are still active and MUST be monitored from the Control Room.
2. Depressurize the compressor for maintenance. 

# jjWARNING Atmospheric vents will release process 

### gas that contain LEL and H2S. 

# ii

2.1 Open the 1/2 blowdown valve to the Flare header to depressure the compressor. 2.2 Open the 3)4 blowdown valve to the Flare header to depressure the compressor. 2.3 Close the 1/2 blowdown valve to the Flare header after depressurizing the compressor. 2.4 Close the 

### 3/4 blowdown valve to the Flare header after depressuring the compressor. 2.5 Close the main isolation block valve to the Flare header. 2.6 Open the atmospheric vent valves on all 4 cylinder stages to verify depressurization. 2.7 Open the cylinder head and crank end vent valves to verify that the cylinders to be worked on are depressured. ExxonMobil Production Isolation Procedure I Aneth Operations File Name HOS4ISO McElmo Creek Unit HOS- 4 COMPRESSOR ISOLATION i Authorized

Gas Reinjection Facility ________________________________________________

Page 2 of3 I Equipment. 4 CM-3400ExxonMobil Production 

# I Isolation Procedure Aneth operations File Name HOS4JSO McElmo Creek Unit HOS- 4 COMPRESSOR ISOLATION i Authorized Gas Reinjection Facility Page 3 of3 Equipment. # CM-3400

2.8 Notify maintenance that they may begin their work. 3. Pressure check compressor.
WARNING Make sure all maintenance work is completed before returning the compressor to service.
3.1. Pressure check compressor with process gas. 3.1.1 Open the main isolation block valve to the Flare header. 3.1.2 Close the atmospheric vent valves on all 4 cylinder stages. 3.1.3 Open the isolation block valve for the close drain. 3.1.4 Open the isolation block valve for the open drain.
WARNING Make sure atmospheric vents are closed before pressurizing compressor with process gas.
3.1.5 Open the isolation block valve for the 1st stage suction. 3.1.6 Open the 1st stage suction valve from the local control panel to pressurize the compressor. 3.1.7 Verify pressures across compressor. 3.1.8 Verify that no leaks are detected on all items worked. 4. Return compressor to service. 4.1. Refer to the HOS-4 Operating procedure for requirements on returning the compressor back into serviceExxonMobil Production Operatmn Procedure

- File Name HOS4COMP Aneth Operations

- McElmo Creek Unit HOS-4 COMPRESSOR Authonzed Page lofIl Gas Rerniecnori Facility 

## I I Equipment. U CM-3400

SCOPE This procedure describes the startup and shutdown ofthe HOS-4 compressor. Applicable steps are initial startup, normal startup, normal operation, temporary operation, emergency operation, normal shutdown, Emergency Shutdown (ESD), safety shutdown, problems and solutions, and operating limits.

REQUIREMENTS None

APPLICABLE HOS-4 Compressor Isolation Procedure DOCUMENTS

SPECIAL None EQUIPMENT

ENVIRONMENTAL For environmental concerns, contact the Field Foreman and the Operations Compliance Technician.

SAFETY For applicable safety requirements, refer to the ExxonMobil Production Safety Manual and Material Safety Data Sheets (MSDS). Care must be taken to completely purge out a compressor which may contain an explosive mixture of gas.ExxonMol,jl Production 

# I Operating Procedure Aneth Operations File Name HOS4COMP McElmo CreekUnit 1-LOS-I COMPRESSOR Authorized Gas Reinjection Facility Page 2 of 11

. Equipment. CM-3400

1. Initial Startup. NOTE Initial startup is performed following an extended compressor shutdown due to maintenance or turnaround. 1.1. Check that the compressor is ready for start. 

# Li Maintenance work complete 

# Li Temporary blinds removed and equipment restored 

# Li Oxygen purged from compressor and piping 

# J Compressor and piping pressure checked using process gas 

# Li Compressor piping rechecked for leaks 

# Li Compressor isolation valves returned to service 

# Li Safety devices, vents, and PRVs returned to service 

# J Instruments, controls, and electrical power returned to service 

# Li Lock-out/Tag-out removed 1.2. Start compressor using normal startup procedure. 2. Normal Startup. NOTE Normal startup is performed following a brief compressor shutdown due or following an extended shutdown after performing the initial startup checks. 2.1. Prepare the compressor for start. 2.1.1. Check compressor is ready for start. 

# Li Plant ESO and local panel shutdowns are reset 

# Li Verify that the LEL, H2S and Fire systems are in normal operation Motor electrical breaker is reset and in 

### service in 

### the MCC building 

# Li Control panel power on 

# Li Manual switch is in the “on” position for the Murphy Mark Ill annunciator2.2 Start 2.2.1

2.2.3 2.2.4 ExxonMobil Production Operanng Procedure File Name I-IOS4COMP Aneth Operanons McElmo Creek Unit HOS4 COMPRESSOR Auth0t Page 3ofIl Gas Reiniection Facihtv ________________________________________________

I Equipment. if CM-3400 I


# J Reset the Bentley-Nevada vibration monitors 

# J Control panel lights working 

# U Enclosure pressure indicator for the Control panel is in the safe zone Crankcase oil level okay Lubricator oil reservoir level okay 

# IJ Jacket water level okay 

# J Verify that all Suction scrubbers are empty, both visually and on the Rosemont DCS 

# J Ensure that the compressor is depressurized 

# J Ensure that the manual block valves on the 1st stage suction and 4th stage discharge lines are in the open position Ensure that all kiene valves and bleeder valves are closed 

# LI Permissive to startup HOS-4 on the Rosemont DCS 

# J The 1st Stage Suction Pressure Controller (PIC-341 1)is placed in manual with an output of 9.4% open on the Rosemont DCS and load compressor. Open the 1 / 2 bypass valve by turning the VO-3412 controller counter-clockwise for a zero psig output. 2.2.2 Open the 3 / 4 bypass valve by turning 

### the VO-3414 controller counter-clockwise for a zero psig output. NOTE The 1 

### I 2 blowdown valve (VO-3462) automatically opens when the compressor is shutdown. Press the reset button on the Murphy Mark Ill (timer is for 5 minutes). Open the 3 

### I 4 blowdown valve by turning the VO-3424 controller counter clockwise for a zero psig output.

2.2.5 Press the “lube oil pump on” button.ExxonMobil Production Operatmg Procedure 

# 1 Aneth Operations File Name HOS4COMP

F McElmo CreekUnit HOS-4 COMPRESSOR Authonzcd 

# I

Gas Reinjecrion Facility _____________________________________________

Page 4 of 11 I Equipment. 4 CM-3400

2.2.6 Press the “Jacket water pump on” button. 2.2.7 Press the “Fan 4 1 on” button 2.2.8 Press the “Fan #2 on” button NOTE Fan #2 can be started on either low or high speed based on ambient temperature. Use low speed if the ambient temperature is below 75 degrees F. Use high speed if the ambient temperature is above 75 degrees 

### F. 2.2.9 Press the “open discharge valve” button. WARNING If the panel light does not come on indicating that the discharge valve is open, visually inspect the valve position to ensure it is opened.
2.2.10 Press and hold the “open suction valve” button until the “open” indication light comes on. 2.2.11 Allow the compressor to purge for a minimum of 30 seconds. 2.2.12 Press the “close suction valve” button. 2.2.13 Press the “close 1 / 2 blowdown valve” (VO-3462) button. 2.2.14 Close the 3/4 blowdown valve by turning the VO.3424 controller clockwise for at least a 40 psig output. 2.2.15 Press and hold the “Yellow PPS-3416” button. NOTE This will complete the start permissive sequence and illuminate the “Ready to Start” light. 2.2.16 Press the “motor start” button while still pressing the “Yellow 

### PPS-3416” button. 

## I NOTE You have 5 minutes to place the 1st Stage Suction Pressure Controller (PIC-341 1) in auto” on the Rosemont DCS or the compressor will shutdown. CAUTION After 2 unsuccessful starts; the compressor motor starter will trip a time delay in the MCC building and prevent you from restarting the compressor. Verify the time delay duration in the MCC building. 2.2.17 Verify that the compressor oil pressure is above 45 p51g. 2.2.18 Press and hold the “open suction valve” button until the “open” indication light comes on. 2.2.19 Close the I / 2 bypass valve by turning the VO-3412 controller clockwise for at least a 40 psig output.ExxonMobil Production Operatmg Procedure 

# 1 Aneth Operations File Name HOS4COMP
Gas Reinjection Facility Page 5 of I I McElmo Creek Unit 110S4 COMPRESSOR Authorized

j Equipment. ft CM-3400

2.2.20 Close the 3 / 4 bypass valve by turning the VO-3414 controller clockwise for at least a 40 psig output. 2.2.21 Press the ‘Timer 0 button on the Murphy Mark Ill annunciator. 2.2.22 Set the 1st Stage Suction Pressure Controller (PIC-341 1) in the “auto’ mode with a setpoint between 22 to 27 psig on the Rosemont DCS. 3. Normal Operation. 3.1. See tables at end of procedure for normal operating parameters. 3.2. Perform daily rounds, including but not limited to the items below:

• Troubleshoot, acknowledge, reset, and clear compressor alarms

• Check compressor normal operating parameters

• Suction and discharge pressures

• Suction and discharge temperatures

• Cylinder temperatures

• Lube oil pressure

• Lube oil filter dp

• Lube oil temperature

• Crankcase oil level

• Lubricator oil level

• Jacket water pressure

• Jacket water temperature

• Check compressor lube oil level and fill as needed

• Check Jacket water tank level and fill as needed

• Check Jacket water pump and cooler fans for proper operation

• Check suction scrubber levels and drain manually if needed

• General housekeeping duties

• Check compressor aftercooler fans operationExxomMobil Production Operaimg Procedure Aneth Operations File Name HOS4COMP McElmo Creek Unit HOS-.4 COMPRESSOR Authorized Gas Reinjecton Facility ________________________________________________

Page 6 of II Equipment. # CM-3400

4. Temporary Operation. NOTE Use oftemporary operating procedures must be approved by the Field foreman. 4.1. Document any temporary procedure changes with a Management of Change (MOC) work order, and a procedure revision request form. 4.2 Follow up on temporary procedures when the system is returned to normal operation or when a temporary procedure becomes permanent. Complete all documentation required. 5. Emergency Operation. 5.1. Refer to 

### Emergency Contingency Plan for emergency response instructions. 6. Normal Shutdown. NOTE Normal shutdown is usually done for compressor maintenance or when inlet gas rates decrease. Control Room operator will coordinate any normal shutdown. 6.1. Shut down compressor. 6.2.1. Press main motor ‘stop’ button. 6.2.2 Press the “close suction valve” button. 6.2.3 Press the “close discharge valve” button. 6.2.4 Open the 1 / 2 bypass valve by turning the VO-3412 controller counter-clockwise for a zero psig output. 6.2.5 Open the 3/4 bypass valve by turning the vO-3414 controller counter-clockwise for a zero psig output. 6.2.6 Open the 3 / 4 blowdown valve by turning the VO-3424 controller counter clockwise for a zero psig output. NOTE Turn offthe associated pumps and cooler fans ifthe compressor will be down for an extended period.ExxonMobil Production Operating Procedure Aneth Operations I File Name HOS4COMP McElmo CreekUnit l-IOS-4 COMPRESSOR Authorized Gas Reinjection Facility Page 7 of 11 Equipment. # CM-3400

7. Emergency Shutdown (ESD) NOTE ESD ofthe Gas Reinjection Facility can be initiated from any of the 7 pull stations located throughout the facility or from 1 push button station located in the Control Room. The Fire, H2S and LEL detection systems will also initiate an ESO. Both systems will shutdown all the reinjection comQressors, isolate the inlet area and depressure the facility.

NOTE The ESD pull stations located throughout the facility are easily identified by the red and white stripes painted on the building or pipe rack support beams. 7.1. Reinjection Facility ESD: 7.1.1. ESD Station One push button station is located inside the Control Room above the Fire, H2S and LEL Detection System’s readout panel and another pull station is located on the southeast wall inside the MCC building (beside the Control Room). 7.1.2. ESD Station Located on a pipe rack support beam on the southeast corner ofthe Acid Gas compressor building. 7.1.3. ESD Station Located outside between the Control Room and the MCC building. 7.1.4. ESD Station Located on the north wall outside ofthe Inlet Building Air Compressor building. 7.1.5. ESD Station Located on a building support beam on the northwest corner ofthe HOS-6 Compressor building. 7.1.6. ESO Station Located on a building support beam on the northwest corner ofthe HOS-4 Compressor building. 7.1.7. ESD Station Located on cooler fan support beam on the southeast corner ofthe HOS-4 Compressor’s Cooler Fan bay. 7.2 Fire, H2S and LEL Detection Systems ESD: 7.2.1, Fire: There are 10 Fire Detection sensors located throughout the facility. Any detection by either of these sensors will initiate an audible alarm and a shutdown ofall reinjection compressors, isolate the inlet area and depressure the facility.

7.2.2. H2S: There are 23 H2S Detection sensors located throughout the facility. Any detection by either ofthese sensors at 10 PPM H2S will initiate an audible alarmExxonMobil Production Operating Procedure

- 

# I File ?same HOS4COMP t Aneth Operanons McElmo Creek Unit HOS-4 COMPRESSOR Authorized Page Sofll Gas Remjection Facility i I Equipment. # CM-3400

and illuminate a “blue’ beacon light. Any detection by either of these sensors at 50 PPM H2S will initiate an audible alarm, illuminate a “blue” beacon light and shutdown all reinjection compressors, isolate the inlet area and depressure the facility 7.2,3. LEL: There are S LEL Detection sensors located throughout the facility. Any detection by either of these sensors at 30 % LEL will initiate an audible alarm. Any detection by either ofthese sensors at 50 % LEL wdl initiate an audible alarm and shutdown all reinjection compressors, isolate the inlet area and depressure the facility

7.3. HQS-4 Compressor ESD. 7.3.1. Local ESD. Trip individual compressor ESD by pressing ‘Stop’ button on local control panel to shut down that compressor only. 7.3.2. Remote ESD. Trip compressor ESD on the Rosemont DCS in the Control Room. 8. Safety Shutdown. 8.1. Any condition below causes a safety shutdown of the compressor:

• ESD pull stations

• Fire, H2S, and LEL Detection systems

• Low instrument air header pressure

• Electrical power failure

• Low discharge pressure on either the 1st, 2nd, or 3rd stage cylinders

• High discharge pressure on either the 1st, 2nd, 3rd, or 4th stage cylinders

• High discharge temperature on either of the 1st, 2nd, 3rd or 4th stage cylinders

• High level in either of the 1st, 2nd, 3rd or 4th stage suction scrubbers

• Low 1st stage suction pressure

• High 1st stage suction pressure

• Low compressor oil pressure

• Low compressor oil level

• No flow cylinder lubricatorAneth erations File Ne HOS4COMP

romMobil Production i Operating Procedure I

McElmo Creek Unit HOS4 COMPRESSOR Authorized Gas Renijecuon Faci1i Equipment. # CM-3400 Page 9 of II

# J

• Low cylinder tube oil Level

• Low water level surge tank

• Cooler fan ‘A” vibration

• Cooler fan “B’ vibration

• Vibration Compressor motor

• Manual shutdown 8.3. See critical operating limits tables at end ofprocedure for safety shutdown trip points. 9. Problems and Solutions. NOTE Refer to the Compressor Troubleshooting guide located in the Control Room.ExxonMobil Production Operating Procedure 

## I Aneth Operations File Name HOS4CDMP McEImo Creek Unit 1-105-4 COMPRESSOR Authorized Gas Reinjection Facility Page 10 of 11 Equipment. # CM-3400 I

10. Operating Limits. 10.1. Shutdown resets: Local Shutdown Resets and Permissives Tag Description Position Setpoint Reinjection Plant Total Reinjection Plant ESD Reset N/A ESD Bentley-Nevada Compressor motor and frame excessive Reset N/A Vibration Monitor vibration

Fire Detection Fire Detection Reset N/A H2S Detection H2S Detection Reset 50 PPM LEL Detection LEL Detection Reset 50 % Remote Shutdown Resets Tag Description Position Setpoint Manual Shutdown Local panel shutdown Reset N/A

Rosemont DCS HOS-4 Run/Stop Run N/A 10.2. Normal operating parameters: NOTE The following parameters are only guidelines. Certain conditions may call for you to operate outside them. HOS-4 Compressor Normal Operating Parameters Description Operating Range 1st stage suction pressure 20 to 27 psig 1st stage discharge pressure 65 to 78 psig 2nd stage suction pressure 60 to 78 psig 2nd stage discharge pressure 300 to 330 psig

3rd stage suction pressure 295 to 330 psig 3rd stage discharge pressure 1 150 to 1260 psi 9 4th stage suction pressure 1145 to 1260 psig 4th stage discharge pressure 2750 to 2950 psi 9 1st stage suction temperature 45 to 105 degrees F 1st stage discharge temperature 250 to 290 degrees F 2nd stage suction temperature 90 to 120 degrees F 2nd stage discharge temperature 275 to 315 degrees F

3rd stage suction temperature 100 to 120 degrees F 3rd stage discharge temperature 275 to 315 degrees F

4th stage suction temperature 105 to 110 degrees F 4th stage discharge temperature 225 to 260 degrees F Lube oil pressure 45 to 55 psigExxomMobil Production Aneth Operations McElmo Creek Unit Gas Reinjecrion Facility Operatin2 Procedure HOS-4 COMPRESSOR Equipment. m CM-3400 Aui Page 11 of 11ExxonMobil Production Isolation Procedvse File Name AGISO Aneth Operations McElnio Creek Unit ACID GAS COMPRESSOR ISOLATION Authorized Gas Reinjection Facility Page 1 of3 Equipment # CM-l201 A/B



### SCOPE This procedure describes the isolation, depressurization and returning ofthe Acid Gas compressor back to service.

REQUIREMENTS None

APPLICABLE Acid Gas Compressor Operating Procedure DOCUMENTS Pre-Start Safety Review Checklist

SPECIAL None EQUIPMENT

ENVIRONMENTAL For environmental concerns, contact the Field Foreman and the Operations Compliance Technician.

SAFETY Locks must be used bV Operations and Maintenance Personal (Two Sets) For applicable safety requirements, refer to the ExxonMobil Production Safety Manual and Material Safety Data Sheets (MSDS). Care must be taken to completely depressure the compressorwhich may contain explosive or sour gas.
Safety devices taken out of service or being returned to service MUST be logged in the Critical Safety Device (CSD) log book in the Control Room.Exxon.MobiI Production isolation Procedure File Name AGISO Aneth Operations McElmo Creek Unit ACID GAS COMPRESSOR ISOLATION Authonzed Page 2 of3 Gas Remjeccion facility I Equipment # CM-1201 A/B

WARNING All valves, switches and breakers referenced in this procedure MUST BE LOCKED AND TAGGED per the Lock-out / Tag-out guidelines.

Isolate the compressor for maintenance. NOTE Refer to the Acid Gas Compressor Operating procedure for requirements to shutdown the compressor. 

# J 1.1 Ensure that the lube oil pump is not running. 1.2 De-energize the electrical breaker for the motor in the MCC building. 1.3 Place the local control panel power switch in the “off’ position. 1.4 Close the 4th stage discharge isolation block valve. 1.5 Close the 1st stage suction isolation block valve. 1.6 Close the isolation block valves on the PSV’s for the 1st, 2nd, 3rd and 4th stages. 1.7 Close the isolation block valves for the closed drain 1.8 Close the isolation block valve for the open drain. 1.9 Place the H2S and LEL Detection system in the “caIibration mode in the Control Room. ‘NOTE While the H2S and LEL Detection system is in the “calibration” mode, the sensors are still active and MUST be monitored from the Control Room.
2. Depressurize the compressor for maintenance. 

# Ii WARNING Atmospheric vents will release process gas that contain LEL and H2S. 

# ii
2.1 Open the blowdown valves on all stages to the Flare header to depressure the compressor. 2.2 Close the blowdown valves on all stages to the Flare header. 2.3 Open the atmospheric vent valves on all 4 cylinder stages to verify depressurization. 2.4 Open the cylinder head and crank end vent valves to verify that the cylinders to be worked on are depressured. 2.5 Notify maintenance that they may begin their work.ExxonMobil Production Isolation Procedure Aneth Operations File Name AGISO McElmo Creek Unit ACID GAS COMPRESSOR ISOLATION Authorized Gas ReinjectionFacilitv Page 3 of3 Equipment 4 CM-1201 A/B

3. Pressure check compressor.
WARNING Make sure all maintenance work is completed before returning the compressor to service.

3.1. Pressure check compressorwith process gas. 3.1.1 Close the atmospheric 

### vent valves on all 4 cylinder stages. 3.1.2 Open the isolation block valves on the PSV 1 s for the 1st, 2nd, 3rd and 4th stages. 3.1.3 Open the isolation block valve for the closed drain. 3.1.4 Open the isolation block valve for the open drain.
WARNING Make sure atmospheric vents are closed before pressurizing compressor with process gas. Open the isolation block valve for the 1st stage suction. Open the 1st stage suction pressure controller to pressurize the compressor. Verify pressures across compressor. Verify that no leaks are detected on all items worked. 3.1.5 3.1.6 3.1.7 3,1.8
compressor to service. Refer to the Acid Gas Compressor Operating procedure for requirements on returning the compressor back into service 4. Return 4.1.ExxonMobil Production Operating Procedure File Name AGCOMP Aneth Oceranons McElmo Creek Unit ACID GAS COMPRESSORS “A” and ,,‘, Authonzed Page 1 of9 Gas Remjecnon Facility Eguipment#CM-l201 A/B

SCOPE This procedure describes the startup and shutdown ofthe Acid Gas Compressors “A” and B” (CM-12Q1NB). Applicable steps are initial startup, normal startup, normal operation, temporary operation, emergency operation, normal shutdown, emergency shutdown, safety shutdown, problems and solutions, and operating limits.

REQUIREMENTS None

APPLICABLE Acid Gas Compressors “A” and “B” (CM-12O1NB) Isolation Procedure DOCUMENTS

SPECIAL None

EQUIPMENT

ENVIRONMENTAL For environmental concerns, contact the Field Foreman and the Operations Compliance Technician.

SAFETY For applicable safety requirements, refer to the ExxonMobil Production Safety Manual and Material Safety Data Sheets (MSDS). Care must be taken to completely purge out a compressor which may contain an explosive mixture of gas.ExxonMobil Production Qerating Procedure Aneth Operations I File Name AGCOMP McEhno CreekUnit ACID GAS COMPRESSORS “A” and “B” Authorized Gas Reinjection Facility Page 2 of9 Equipment # CM-1201 AfB

Initial Startup. ‘NOTE Initial startup is performed following an extended compressor shutdown due to maintenance or turnaround. Refer to the Acid Gas Compressor isolation procedure when the compressor will be returned to service. 1 .1 Check that the compressor is ready for start. 

# Li Maintenance work complete 

# Li Temporary blinds removed and equipment restored 

# Li Oxygen purged from compressor and piping 

# Li Compressor and piping pressure checked using process gas 

# U Compressor piping rechecked for leaks 

# Li Compressor isolation valves returned to service 

# J Safety devices, vents, and PRVs returned to service 

# Li Instruments, controls, and electrical power retume to service 

# Li Lock-out/Tag-out removed 1.2. Start compressor using normal startup procedure.

2. Normal Startup. NOTE Normal startup is performed following a brief compressor shutdown due or following an extended shutdown after performing the initial startup checks. ________ ______

2.1. Prepare the compressor for start. 2.1.1. Check compressor is ready for start. 

# Li Plant ESD and local panel shutdowns are reset 

# Li Verify that the LEL, H25 and Fire systems are in normal operation 

# Li Motor electrical breaker is reset and in service in the MCC building under the Control Room. 

# Li Control panel power onExxonMobil Production Operating Procedure Meth Operations File Name AGCOMP McEhno Creek Unit ACID GAS COMPRESSORS “A” and “B” 

# I Authonzed Gas Reinjecüon Facility Page 3 of9 Equipment CM-1201 AIR


# J Manual switch is in the “run’ position for the Murphy Mark III annunciator 

## ‘j Electrical motor oil level 

# LI Crankcase oil level okay 

# J Lubricator oil reservoir level okay 

# J Jacket water level okay Visually verify that all Suction scrubbers are empty 

# U Ensure that the compressor is depressurized 

# J Ensure that all kiene valves and bleeder valves are closed

2.2 Start and load compressor. NOTE The compressor should not have more than 10 psig of suction pressure on the 1st stage. It there is more than 10 psig, the pressure should be bled off. This is to prevent overloading the compressor driver. __________ _________________

2.2.1 Start the motor cooling fan (CM-1203). 2.2.2 Start the aftercooler fans (HT-1 603, HT-1 604, HT-1 605, and HT-1 606). 2.2.3 Ensure the 1st stage suction valve is manually closed. 2.14 Reset the Murphy switch gauges high/low shut down. Turn the Murphy switch qauge (low) to zero setting. 2.2.5 Zero out the timer on the Murphy Mark Ill on the annunciator panel. 2.2.6 Verify and manually opens the 4th stage discharge valves. NOTE Ensure that the 4th Stage discharge isolation block valve located on the south side ofthe compressor building is open. 2.2.7 Press the main motor ‘start button, 2.2.8 1 minute Pre-Lube CAUTION After 2 unsuccessful starts; the compressor motor starterwill trip a time delay in 

### the MCC building and preventyou from restarting the compressor. 2.2.9 Manually open the 1st stage suction valve.ExxonMobil Production Operatmg Procedure Aneth Operations File Name AGCOMP McElmo Creek Urüt ACID GAS COMPRESSORS “A” and “B” Authorized Gas Reinjection Facility Page 4 of9

I Eguipment#CM-1201 AID

NOTE At 200 psig, the 4th stage blowdown valve to flare will close automatically. Reset all murphy switches shut down setpoint to normal shut down setting on panel. NOTE Murphy switch gauges on local panel not to exceed the PSV’s setting 3. Normal Operation. 3.1. See tables at end ofprocedure for normal operating parameters. 3.2. Perform daily rounds, including but not limited to the items below:

• Troubleshoot, acknowledge, reset, and clear compressor alarms

• Check compressor normal operating parameters

• Suction and discharge pressures

• Suction and discharge temperatures

• Cylinder temperatures

• Lube oil pressure

• Lube oil filter dp

• Lube oil temperature

• Crankcase oil level

• Lubricator oil level

• Jacket Water Pressure (3)

• Jacket Water temperature

• Check compressor lube oil level and fill as needed

• Check Jacket Water tank level and fill as needed

• Check Jacket Water pump and coaler for proper operation

• Check suction scrubber levels and drain level as needed

• General housekeeping duties

• Check aftercooler fans operationExxonMobil Production Opemtmg Procedure Aneth Operations File Name AGCOMP McEhno Creek Unit ACID GAS COMPRESSORS “A” and “B” Authorized Gas Reinjection Facility _________________________________________

Page 5 of9 Equipment # CM-1201 A/B

• Check all 4-skies electrical motor oil level

4. Temporary Operation. NOTE Use oftemporary operating procedures must be approved by the Field foreman. 4.1. Document a temporary procedures with a management of change (MOC) work order, procedure revision request, and/or safety devicesjumpering log book. 4.2 Follow up on temporary procedures when the system is retumed to normal operation or when a temporary procedure becomes permanent. Complete all documentation required. 5. Emergency Operation. 5.1. Refer to Emergency Contingency Plan for emergency response instructions. 5.2. See this procedure for emergency shutdown (ESD) instructions. 6. Normal Shutdown. NOTE Normal shutdown is usually done for compressor maintenance or when inlet gas rates decrease. Control Room operator will coordinate any normal shutdown. 6.1. Shut down compressor. 6.2.1. Press main motor ‘stop’ button. NOTE On any Acid Gas compressor shutdown, the blowdown valves to flare will open and depressure the compressor. 6.2.2 Manually block in the 1st stage suction valve. 6.2.3 Manually block in the 4th stage discharge valve. (Maintenances) 6.2.4 Wait 1010 15 minutes, then tum offthe motor cooling fan.ExxonMobjl Production Operatmg Procedure Aneth Operations File Name AGCOMP McEhno Creek Unit ACID GAS COMPRESSORS “A” and “B” Authorized Gas Reinjecnon Facility Page 6 of9 EguipmentCM-l2Ol A8

7. Emergency Shutdown (ESD) NOTE ESD of the Gas Reinjection Facility can be initiated from any ofthe 7 ESD pull stations located throughout the facility or from 1 push button station located in the Control Room. The Fire, H2S and LEL detection systems will also initiate an ESD. Both systems will shutdown all the reinjection compressors, isolate the inlet area and depressure the facility.

NOTE The ESD pull stations located throughout the facility are easily identified by the red and white stripes painted on the building or pipe rack support beams.

7.1. Reinjection Facility ESD: 7.1.1. ESO Station One push button station is located inside the Control Room above the Fire, H2S and LEL Detection System’s readout panel and a pull station is located on the southeast wall inside the MCC building (beside the Control Room). 7.1.2. ESD Station Located on a pipe rack support beam on the southeast corner ofthe Acid Gas compressor building. 7.1.3. ESD Station Located outside between the Control Room and the MCC building. 7.1.4. ESD Station Located on the north wall outside of the Inlet Building of Air compressor. 7.1.5. ESD Station Located on a building support beam on the northwest corner ofthe HOS-6 Compressor building. 7.1.6. ESD Station: Located on a building support beam on the northwest corner ofthe HOS-4 Compressor building. 7.1.7. ESD Station: Located on cooler fan support beam on the southeast corner ofthe HOS-4 Compressor’s Cooler Fan bay.

7.2 Fire, H2S and LEL Detection Systems ESD: 7.2.1. Fire: There are 10 Fire Detection sensors located throughout the facility Any detection by either of these sensors will initiate an audible alarm and a shutdown of all reinjection compressors, isolate the inlet area and depressure the facility.

7.2.2. H2S: There are 23 H2S Detection sensors located throughout the facility. Any detection by either ofthese sensors at 10 PPM H2S will initiate an audible alarm and illuminate a “blue” beacon light. My detection by either ofthese sensors atExxonMobil Production Operating Procedure Aneth Operations File Name AGCOMP McElmo Creek Unit ACID GAS COMPRESSORS “A” and “B” Authorized Gas Reinjection Facility Page 7 of9 Eguipment# CM-1201 AJB

50 PPM H2S will initiate an audible alarm, illuminate a “blue” beacon light and shutdown all reinjection compressors, isolate the inlet area and depressure the facility 7.2.3. LEL: There are 8 LEL Detection sensors located throughout the facility. Any detection by either ofthese sensors at 30 % LEL will initiate an audible alarm. Any detection by either of these sensors at 50 % LEL will initiate an audible alarm and shutdown all reinjection compressors, isolate the inlet area and depressure the facility

7.3. Acid Gas Compressor ESD. 7.3.1. Local ESD. Trip individual compressor ESD by pressing ‘Stop’ button on local control panel to shut down that compressor only. 8. Safety Shutdown. 8.1. Any condition below causes a safety shutdown of the compressor:

• ESD pull stations

• Fire, H25, and LEL Detection systems

• Low instrument air header pressure

• Electrical power failure

• Low discharge pressure on either the 1st, 2nd, 3rd or 4th stage cylinders

• High discharge pressure on either the 1st, 2nd, 3rd, or 4th stage cylinders

• High discharge temperature on either ofthe 1st, 2nd, 3rd or 4th stage cylinders

• High level in either ofthe 1st, 2nd, 3rd or 4th stage suction scrubbers

• Low 1st stage suction pressure

• High 1st stage suction pressure

• Crank case oil pressure

• Oil level low

• No flow cylinder lubricator on either ofthe 1st, 2nd, or 3rd stage cyiinders

• No flow cylinder lubricator on the 4th stage cylinder

• Low cylinder lube oil level! ExxonMobil Production Operating Procedure Aneth Operations I File Name AGCOMP McElmo Creek Unit ACID GAS COMPRESSORS “A” and “B” Authorized Gas ReinjectionFacility Page 8 of9

, Eguipment#CM-1201 AJB 

# 1

• Jacket Water 1st, 2nd, 3rd low pressure

• Jacket Water pressure

• Low Jacket Water Tank level 4 1

• Low Jacket Water Tank level 4 2

• Vibration

• Manual shutdown

9. Problems and Solutions. NOTE Refer to the Compressor Troubleshooting guide located in the Control Room. 10. Operating Limits. 10.1. Shutdown resets: Local Shutdown Resets and Permissives Tag Description Position Setpoint Reinjection Plant Total Reinjection Plant ESD Reset N/A ESD Fire Detection Fire Detection Reset N/A H2S Detection H2S Detection Reset 50 PPM LEL Detection LEL Detection Reset 50 % Remote Shutdown Resets Tag Description Position Setpoint Manual Shutdown Local panel shutdown Reset 

# T N/A

10.2. Normal operating parameters: NOTE The following parameters are only guidelines. Certain conditions may call for you to operate outside them.

Acid Gas Compressor Normal Operating Parameters Description Operating Range 1st stage suction pressure 18 to 20 psi 9 1st stage discharge pressure 90 to 100 psigExxonMobjl Production Operatmg Procedure Aneth Operations File Name AGCOMP McElmo Creek Unit ACID GAS COMPRESSORS “A” and “B” Authorized Gas Reinjection Facility Page 9 of9 Equipment # CM-1201 A/B

2nd stage suction pressure 85 to 100 psig 2nd stage discharge pressure 400 to 410 psig

3rd stage suction pressure 395 to 410 psig 3rd stage discharge pressure 1150 to 1250 psig

4th stage suction pressure 1145 to 1250 psig 4th stage discharge pressure 2750 to 2950 psig 1st stage suction temperature 45 to 100 degrees F 1st stage discharge temperature 230 to 250 degrees F 2nd stage suction temperature 90 to 100 degrees F 2nd stage discharge temperature 270 to 280 degrees F

3rd stage suction temperature 110 to 125 degrees F 3rd stage discharge temperature 270 to 280 degrees F

4th stage suction temperature 110 to 125 degrees F 4th stage discharge temperature 270 to 280 degrees F Lube oil pressure 45 to 55 psig Jacket water pressure 20 to 25 psig Crankcase lube oil pressure 60 to 90 psig

## APPENDIX 4 Compressor Troubleshooting Guide

## COMPRESSOR TROUBLESHOOTING GUIDE

ENGINE & FRAME SHUTDOWNS Low Engine/Frame Oil Pressure High Engine/Frame Oil Temperature 3 High/Low Intake Manifold Pressure 4 High Manifold Temperature 6 Lubricator No Flow 7 High Main Bearing Pressure/Temperature 8 Engine Overspeed 9 High Engine/Frame Vibration 10 II. COOLING SYSTEM SHUTDOWNS Low Auxiliary Water Pressure 11 Low Coolant Level 12 Low Jacket Water Pressure 3 High Jacket Water Temperature 14 High Cooler Vibration 15 

## III. GAS CIRCUIT SYSTEM SHUTDOWS High/Low Suction Pressure 16 High Scrubber Level 17 High/Low Interstage Pressure 19 HighlLow Discharge Pressure 20 High Discharge Pressure 21 

## IV. IGNITION & PANEL BOARD Altronic Ignition 22 CEC Ignition 23 Ignition System 24 Panel Board Components 25

### Shutdown on Low Engine/Frame Oil Pressure Troubleshooting Guide POSSLE CAUSE CORRECJVE ACTIONS Low Oil Level (High I. Check oil level. level 

### can cause foaming, 2. Add oil as needed. resulting in low 3. Restart unit. 

### pressure.) Dirty Filters 1. Check differential pressure across filters, strainer and cooler. 2. Ifdifferential pressure is high, replace filters and strainer; clean cooler. Oil Pump 

### Malfunction 1. Stan unit. 2. Check for normal oil pressure at pumpout. 

### 3. Ifoil pressure at pump out is low, oil pump is faulty; • repair or replace as needed.

4. Ifair is present, change pump. 5. Ifoil pressure at header is normal, continue 

### F troubleshooting.

6. Check pump suction screen for obstruction.
• 7. Ifclogged. clean or replace screen. Gauge Malfunction I. Use manometer (test gauge) to check panel gauges for malfunction. 2. Check wiring and tattle tale; repair or replace as needed. 3. Calibrate or replace gauges as needed. 4. Check oil sensing line forpluggage. Engine is Misfiring 1. Load unit.

• 2. Use digital or hand-held pyrometer (test gauge) to check for misfires causing 

## unit to bog down. (Statiscope or timing light 

## can be used, ifpyrometer is not available.) 3. Check ignition: replace plugs or wire ifnecessar. 4. Check fuel system; adjust to specs. 

### ReliefValve Stuck I. Check reliefvalve setting and position. 

### Open or Set Too Low 2. Correct as needed, High Oil Level Caused I. Check day tank 

### water levels to see ifthere is a leak in by Water/Liquid head, gasket or liner. Dilution 2. Call Mechanic.

### POSSIBLECAUSE•IZ Low Oil 

### Viscosity I. Change oil. 2. Check recent oil sample analysis results. Unit Bogging Down I. Check chart or meters to verify 

### that suction and discharge are 

### normal. 2. Check for proper oil level in governor. 3. Check for broken or loose linkage; repairor replace as needed.
Iflow engine/frame oil pressure continues and you have taken all corrective steps, call Mechanic.

2

### Shutdown on High Engine/Frame Oil Temperature Troubleshooting Guide POSSIBLECAUSE CORRECTIVE ACTIONS High Oil Level I. Check oil level. 

### 2. Adjust oil level as needed. Binding or 

### Tightness in 

# f 1. Roll engine and compressorby hand. Compressor 

### Engine 2. Check for binding or tightness. 3. Ifbinding or tightness 

### exist, notify Mechanic immediately. Do NOT start unit. 4. Ifno binding or tightness is found, sian engine. Dirty Oil Filters 1. Check differential pressure across filters. 2. Change filter ifpressure drop exceeds ExxonMobil ; 

### parameters.

Clogged or Blocked Oil I. Check auxiliary water level. Cooler 2. Add coolant as needed. 3. Check pressure and temperature differentials across cooler. 4. Clean or replace oil cooler as needed. Faulty Gauge 

### I. Use test gauge or pyrometer to compare pressure and temperature panel gauges. 2. Calibrate or replace gauge as needed. 3. Ensure kill setpoint is set to ExxonMobil parameters. Amot Valve Not Letting 1. Replace amot valve. Oil Into Cooler 

# t Broken Thermostat I. Scan piping fortemperature variances. 2. Replace thermostat. Engine Overload 1. Check engine load. 2. Check for misfires. 3. Check timing; adjust to engine specs. Stuck Oil Thermostat I. Check for bypass around oil cooler. 2. Replace thermostat.


### Ifhigh engine/frame oil temperature continues and you have taken all corrective steps, call Mechanic.

3

## Shutdown on High /Low Intake Manifold Pressure Troubleshooting 

## Guide

-- 

### POSSmLECAUSE CORRECTIVE ACTIONS 

## Faulty Timing 1. Start unit. 

## 2. Use timing lightto checktiming. 3. Adjust 

## magneto as needed to adjust timing. 4. Check drive forwear.

• Damaged Drive 

# ii. Inspect drive coupling or figure 8 for damage.

: 

### Coupling or Figure 8 2. Repair or replace drive coupling or figure 8 as needed.

Engine is Misfiring 1. Load unit. 2. Use digital pyrometerto check for cyLinder temperature variances. 3. Check rpm 

### and engine fuel pressure. 4. Use timing light to check plug firing.

. 

### Ifplug is not firing, refer to “Panel Component Troubleshooting Guide.”

• 

### Ifplug is firing, continue to next step. 5. Tap on emission valve to see ifit is stuck. 6. Use volt meterto check magneto voltage. 7. Check cannon plug 

### and wiring harness. 8. Repair or replace 

### parts as needed. 9. Check for liquid in fuel. 

## Ignition Problem I. Use volt 

### ohm meter to check magneto voltage. Note: Voltage shouldbe 150-190 DC (Altronic III) or 120-125 DC

# (cm. 2. Ifyou have an Aitronic III ignition, refer to “Altronic III Ignition Troubleshooting Guide.” 3. Ifyou have a CEC ignition, referto “CEC Ignition Troubleshooting Guide.” Insufficient Fuel Supply I. Check 

### fuel pressure at Fisher 99 

### and prechamber pressure on Fisher 95. 2. Setpressure to ExxonMobil parameters or factory specs as needed.

• 3. Check for liquid in fuel; drain fuel scrubbers or fuel supply lines. 4. Check carburetors; repair or clean diaphragms. 5. Check complete fuel system; set to specs. Faulty Wires or Coils I. Check plug wires, coils 

### and all wiring. 2. Replace as needed.

4

### POSSIBLE CAUSE CORRECTIVE ACTIONS Engine Overload 1. Check chart or meter for engine overload (caused by excess suction). 2. Start and load unit. 3. Check suction control valve for malfunction, causing sudden increase in suction gas flow. 4. Contact client as needed.

‘ 

### Gauge Malfunction 1. Use manometer to check panei gauges for malfunction. 2. Calibrate orreplace gauges as needed.

! 

### Load Changes 1. Check meters or chart for flow changes.

(SuctionlDischarge 2. Check recycle and control valves; adjust ifpossible or Pressure) notify client ofpossible problems. Governor I. Check oil in governor; replace or add oil as needed. MalfunctionlFaultv 

# p 2. Check governor linkage and rod ends: repair or replace as Linkage needed. Panel Malfunction I Check panel gauges and tubing to panel for accuracy. 2. Check tubing for obstruction or leak. 3. Replace gauges/tubing as needed.

! 

### Turbo Malfunction I. Check thrust by hand: measure turbo output and balance banks. 

# I 2. Replace turbo ifthrust is out.

Compressor Packing 1. Check packing. Leaks 2. Replace packing ifleaks are present.
Ifhigh/low intake manifold pressure continues and you have taken all corrective steps, call Mechanic.

5

## Shutdown on High Manifold Temperature Troubleshooting Guide POSSIBLECAUSE COU1ECT1VEACTIONS Low Auxiliary Water L Check auxiliary water level. Level 2. Add coolant as 

### needed. 3. Check for water on skid, indicating cracked pipe/hose or loose connection. 4. Check louvers; adjust as needed. 

### Belt/Pump Malfunction I. Check auxiliary waterpump and belts. 2. Repair orreplace as needed. Auxiliary Water High I. 

### Start and load 

### unit. F 

### Temperature or Low 2. Check gauge for 

### auxiliary waterpressure.

Pressure 3. Ifthere is lowpressure, replace water pump. 4. 

### Use pyro scarmer to check differential temperature across intercooler.

• Ifdifferential temperature is high, inspect 

### and clean intercooler. 5. Check for air lock in system; bleed air from system. 6. Check main cooler system; check for propervalve position; clean cooler as needed. Gauge Malfunction I. Use manometer (test gauge) to check panel gauges for malfunction. 2. Calibrate orreplace gauges as needed. Fuel is Too Rich I. Adjust fuel system using oxygen meter. 2. Check for liquid. Engine is Overloaded I. Check manifold pressure 

### with engine running. 2. Check for 

### gas flow changes. Wrong Timing Setting 

# I I. Check timing 

### and adjust ifneeded. Intake Valve Leak I. Check individual inlettemperatures to check for leaks. 2. Repair leaks as needed.


### Ifhigh manifold temperature continues 

## and you have taken all corrective steps, call 

## Mechanic.

6

### Shutdown on Lubrication No Flow Troubleshooting Guide

. 

### POSSIBLE CAUSE CORRECTIVE ACTIONS Insufficient Oil in 1. Check oil in lube box. 

### Lubricator Box 2. Check oil regulator supply to lube box. 3. Repair or replace oil regulator supply in lube box as needed. Broken Lubricator I. Ensure gear drive and all couplings are not broken or Drive stripped. 2. Replace drive coupling or chain as needed. Faulty Lubricators l. Ensure all lubricators are pumping the proper amount of I I 

### lubrication drops perminute. 2. Prime or replace lubricator as needed. 

### Blown Rupture Disc 1. Disconnect lubricator lines at cylinders. 2. Prime Lubricator System with Trebon Gun. I 

### 3. Ifrupture disc continues to blow, replace distribution block and cylinder check valves. Faulty No-Flow Switch I Check lubricator no-flow switch for sensitivity.

, 

### 2. Adjust sensitivity setting to manufacturer’s specifications. 

### 3. Use volt 

### ohm meter to inspect no-flow switch for wiring 

### short. 4. Replace wiring as needed. 5. Ifgrounded wire cannot be found, refer to “Panel 

## j Component Troubleshooting Guide.”



### Ifno lube flow continues and you have taken all corrective steps, call Mechanic.

7

## Shutdown on High Main Bearing Pressure/Temperature Troubleshooting Guide POSSIBLE CAUSE COIU{EC’TDTE 

## ACTIONS 

# I Main Bearing Switch 1 Use Trebon gun to pressure probe header at switch to 2 5 Z 

## Malfunction 45 psi. Hold 30 seconds.

• Ifpressure does not hold, do 

## NOT start unit; skip to the main bearing probe rupture (below).
i • 

### Ifpressure holds, inspect switch for wiring short or proper contact. 2. Adjust setpoint ofmain bearing switch. 3. Start unit panel should clear immediateiy. Main Bearing Probe I. Do NOT stan unit. Rupture 2. Notify Mechanic immediately for probe replacement and bearing inspection. Engine Bogging Down 1. Check setpoint on switch; set to specs or ensure setpoint is lower than engine oil pressure kill setpoint. 2. Check’ignition and fuel settings; set to specs. 3. Check timing and set to specs.


## Ifhigh main bearing temperature continues and you have taken all corrective steps, 

## call Mechanic.

8

## Shutdown on Engine Overspeed Troubleshooting Guide POSSIBLE CAUSE CORRECTWE ACTIONS Tachometer 1 Start engine 

### and idle. 

## Malfunction 2. Cheek magneto voltage with volt 

### ohm meter. 

### 3. Ifvoltage is high or low, inspect magneto for possible 

### malfunction. 4. Ifmagneto is malfunctioning, repair or replace as needed. 

## 5. Ifvoltage is normal, load unit. 6. Use timing lightwith digital display to determine tachometer accuracy. 7. Replace tachometer ifaccuracy is still in doubt. 8. Check cannon plug in mag back. Speed Controller I. Inspect speed controller gauges for proper supply and Malfunction output. 2. Iflow supply or output, inspect, repair 

### and/or replace gauges or regulator. Governor Malfunction 1. Check oil level in governor. 2. Add oil as necessary. 3. Check governor linkage.

! 

### 4. Replace governor rod ends as needed.

5. Bleed governor or adjust compensating needle to eliminate engine surge. Old Style Overspeed 1. Inspect wiring with volt 

### ohm meter. Switch Malfunction 2. Replace wiring as needed. 3. Inspect overspeed switch for malfunction or short. 4. Replace switch. Load Reduction 1. Ensure suction/discharge pressures 

### are within normal ranges.

- 

### 2. Ifreduced load is present and unit is running too fast, slow unit to proper rpm; determine cause ofload change; inspect pressure kills forproper setting.


## Ifengine ovenpeed continues and you 

## have taken all corrective 

## steps, call Mechanic.

9

## Shutdown on High Engine/Frame Vibration 

## Troubleshooting Guide POSSIBLE CAUSE CORRECTIVEACTIONS Loose Mounting Bolts I. Check bolts. 

### 2. Tighten as needed. 3. Ifengine or frame mounts are Loose, call Mechanic for alignmentldeflection checks. 

### Vibration Switch I. Roll unit over by hand 4-5 revolutions. 

### Tripped 2. Check for binding or noise. 3. Ensure start switch and fuel are off. 4. Roll engine over with starter. 

### ; 5. Listen forunusual knocking or noise.

6. Reset vibration switch. : 

### 7 Ensure no liquid is present in fuel to cause detonation:

. 

### drain fuel scrubber and check carburetor as needed. 8. Clear panel. 9. Start up unit. Vibration 

### Switch to Set 1. Check-sensitivity setting. Too Sensitive 2. Adjust as needed. 

### Short in Wire to Panel I. Check panel:

. 

### Ifpanel clears, load unit and monitor closely. ! • 

### Ifpanel does not clear, continue to next step.

2. Use volt meterto located grounded wire. 3. Replace wire. 4. Ifgrounded wire carmot be found, referto “Panel Component Troubleshooting Guide.” 

### Broken Valve, Piston or I. Pull valve caps and inspect or replace valves as Piston Rod necessary. 2. Pull head and inspection doors; inspect crosshead, rod, rod nut and piston. 3. Repair or replace parts as needed.

‘ 

### High Scrubber 

### Level I. Check scrubber for high liquid level. 2. Ifliquid is found, replace level controller and repair dump valves.


### Ifhigh engine/frame vibration continues and you have taken all corrective steps, call Mechanic.

## Shutdown on Low Auxiliary Water Pressure Troubleshooting Guide

Iflow auxiliary water pressure continues and 

## you have 

## taken all corrective steps, call Mechanic. . 

### POSSIBLE 

## CAUSE CORRECTIVE ACTIONS 

## [ Low Coolant Level 1. Check coolant level; add coolant as needed. 

## 2. Check for 

### leak on skid; repair leak as needed. EWater Pump/Belt 1. Visually inspect auxiliary 

## water pump and belt for wear

Failure and leaks. 2. Replace pump and/or belt as needed. Blockage in Intercooler I. Start engine.
! 

### 2. Check differential temperature and pressure across intercooler.



### • Iftemperature differential is high or pressure differential is low, 

### inspect intercooler for possible blockage. Faulty Gauge 1. Use test gauge to test auxiliary water pressure. 2. Verify pressure on panel board gauge. 3. Calibrate or replace gauge as needed. Air in System 1. Bleed 

### out on highest point ofsystem and at the top of pump. 2. Check seal in waterpump; replace pump as 

### needed.

II

## Shutdown on Low Coolant Level Troubleshooting Guide POSSIBLE CAUSE CORRECTIVE ACTIONS.. Gauge Cocks on Sight 1. Ensure gauge cocks on sight glass are open and you have Glass are Closed true coolanttank reading. Coolant Leaks I. Check for loose hoses, fittings or piping causing coolant leaks; repair or replace as needed. 2. Check for leak on skid; repair leak as needed. 3. Check for leaking water ump seal; change water pump if seal is leaking. Malfunctioning Level 1. Check level controller float. Controller on Surge • 

### Iffloatis not intact, replace.
• Tank 2. Check micro-switch on level controller.

• Replace micro-switch ifdefective. 3. Use volt ohm meterto check for shorts in wire.

• Replace wire as needed. Internal Leaks I. Check crankcase for coolant. 2. Check for head gasket or liner leaking into base. 3. Repair leaks as needed.

Iflow coolant level continues and you have taken all corrective steps, call Mechanic.

12

### Shutdown on Low Jacket Water Pressure Troubleshooting Guide POSSIBLE CAUSE CO1U{ECTWE ACTIONS 

# El Low Coolant Level 1. Check coolant level. 

### 2. Addcoolantto proper level as needed. 3. Check 

### for leak on skid; repair leak as needed. 

## r 4. Check hoses; repair orreplace as needed. Water Pump/Belt 

# fl I. Visually inspect waterpump and belts for wear or leaks. Failure 2. Replace pump/belts as needed. 3. Check for coolant leak; check engine base forcoolant leak. 4. Repair any leaks found. 

### 5. Startunit. 6. Checkjacket water pressure.

. 

### Ifpressure is low, use test gauge to verify panel gauge accuracy.
• Ifpressure is low, replace waterpump or belts as needed. 

### 7. Check hoses/couplings on pump inlets.

. 

### Repair/Replace parts as needed. Faulty Gauge I. Use test gauges to check panel gauges for accuracy. 2. Ifpanel gauge is inaccurate, calibrate or replace gauge. 

### Faulty Valve Position I. Ensure proper inlet/outlet valve position. Cracked Head, 

### Head I. Check crankcase 

### oil level. Gasket or Liner 2. Check for water in 

### crank case. 3. Drain oil 

### and check for leaking liner.

• If

### leak is found, repair/replace 

### parts as needed. Air Trapped in System 1. Bleed air at highest point on system. 2. Replace radiator cap with new one. Plugged/Dirty Cooler 1. Clean coolercoils as needed.
Iflowjacket water pressure continues and you have taken all corrective steps, call Mechanic.

13

### Shutdown on High Jacket Water Temperature Troubleshooting Guide POSSIBLE CAUSE CORRECTIVEACTIONS Low Coolant 1. Check coolant level. 2. Add coolant 

### to proper level as needed. 3. Check 

### for leak 

### on skid; repair leak as needed. 

### Water Pump or Belt 1. Visually inspect water pump, water belts and cooler fan 

### Failure, belts for wear or leaks. 2. Replace pump or belts as needed. Faulty Gauge 1. Start engine. 

### 2. Use test gauges or pyro scanner to check water pressure and temperature gauges. 3. 

### Calibrate orreplace gauge as needed. Low Temperature I. Ensure proper louver position. Differential on Cooler 2. Check cooler fins for possible blockage. Caution: Use proper lock/tag procedures ifyou must enter cooler. 3. Remove blockage or wash cooler fins. 4. Check tubes for scale obstructions; clean as needed. Incorrect Ignition I. Check ignition timing. Timing 2. Advance or retard timing to ExxonMobil parameters as necessary. Overload Detonation I. Check manifold pressure. 2. Check oxygen setting. 3. Check suctionidischarge pressures for changes in load or

‘ 

### gas flow. Sticking Thermostats I. Use pyro scanner on each side ofthermostat ifpossible. 2. Remove thermostats and test in hot water. : 3. Repair/replace thermostats as needed.

Fan Blades Need I. Check pitch on fan blades: torque to specs. Adjustment 

### Incorrect Antifreeze I. Determine 

### ifantifreeze 

### is mixed correctly. Mixure 2. Check freeze point and pH 

### levels; drain/replace antifreeze as needed.



### Ifhighjacket water temperature continues and you have all corrective steps, call Mechanic.

14

### Shutdown on High Cooler Vibration 

## Troubleshooting Guide POSSIBLECAUSE 

# [ CORRECTIVE ACTIONS Loose Mounting Bolts 

# fl. Check 

### bolts.

• 2. Tighten as needed. Vibration Switch 1. Roll unit overby hand 4— 

## 5 revolutions. 

### Tripped 2. Cheek for binding or noise. 3. Ensure 

### start switch 

### and fuel are off. j 

### 4. Roll engine over with 

### starter. 5. Listen for 

### unusual knocking 

### or noise. 

## 6. Reset vibration switch. 7. Clear panel. 8. 

### Start up unit. Vibration Switch is Set 

# fl. Check sensitivity setting. Too Sensitive 2. Adjust as needed. Mechanical 1. Visually inspect belts and cooler blades to see ifthey are Malfunction loose or damaged. Caution: Topreventinjury, use lock-out/tag-out procedure 

## if you must enter cooler. 

### 2. Tighten. repair or replace belts, bearings or blades. Wiring or Vibration 1. Start unit. Switch Malfunction 2. Check panel. 3. Ifpanel does not clear, use volt meter to locate grounded 

### wr 4. Replace wire as needed. 5. Ifgrounded wire cannot be found, refer to “Panel Component Troubleshooting Guide.” Loose Fan Blades I. Replace 

### fan blades as needed. 2. Check torque; retorque bolts 

### and check blades forproper angle.


### Ifhigh coolervibration continues and you have taken all corrective steps, call Mechanic.

15

### Shutdown on High/Low Suction Pressure Troubleshooting Guide POSSIBLE.CAUSE CORRECHVEACTIONS. Suction Control Valve 1. Start and 

### load unit. Malfunction 2. Compare suction pressure to reading on previous OperatorReport. 3 Check custody charts forhigh or low suction condition. 4. Adjust control valve or notify client ofcontrol valve problem. Faulty Gauges 1. Use test gauges to check panel gauges for accuracy. 

### 2. Calibrate orreplace gauges as needed. 

### Frozen, Plugged or I. Thaw sensing lines with methanol. 

### Broken Lines Use extreme caution when using methanoL Wear appropriateppe. 2. Replace broken tubing. 

### Dump Valve 

### Hung 1. Check scrubber dumps. 

### Open 2. Reset dump 

### controller. Recycle Malfunction 1. Check recycle valve operation. 2. Adjust as needed forproper setting. 

### Client Production 1. Check separator pressure. 

### Equipment Problems 2. Look forpossible equipment problems; notify Field Reliability Specialist as needed. Intake Screen or Filter 1. Check differential pressure across filter/screen. Plugged 2. Change/Clean filter/screen as needed.


### Ifhighilow suction pressure continues and you have taken all corrective steps, call Mechanic.

16

### Shutdown on High Scrubber Level Troubleshooting Guide POSSIBLE CAUSE CORRECTIVE ACTIONS Closed Sight Glass 

### I. Ensure sight glass gauge cDcks are open. 

### Gauge Cocks 2. Check for level in sight glass. 3. Ifthere is no level, adjustcontroller as needed to maintain level. Level Controller I. Ensure level controllerhas adequate air supply and Malfunction gas/air output pressure to dump valve. 2. Check supply regulator for malfunction.

. 

### Repair or replace regulator ifnecessary. 3. Ensure level controller is working properly. 4. Check controllerpans; tighten or replace as needed. Blockage in Dump I. Check output to dump valve. Valve 2. Ensure dump valve is operational. 3. Remove any blockage in valve. 4. Check for trapped pressure; relieve trapped pressure SLOWLY ifpossible. 

### Frozen Dump Lines I. Check dump line for freezing. 2. 

### Warm lines as needed.
: 

### Caution: Use extreme caution when warming lines as high pressure is trapped in lines. 3. Check fortrapped pressure; relieve trapped pressure SLOWLY ifpossible. High Level Shutdown 1. Ensure float on high level shutdown is intact. Malfunction • 

### Ifflowat is not thtacL replace float. 2. Inspect micro-level switch in high level shut-down switch.

• Replace shut-down switch as needed. Short in Wiring 1. Reset panel. 2. Ifpanel will not clear, check for short in wire; replace wire from high level shut-down switch. 3. Ifgrounded wire cannot be found, refer to “Panel Component Troubleshooting Guide.”

‘7

### POSSIBLE CAUSE CORRECTIVEACTIONS Valve OffSkid is Closed 1. Trace piping offskid to find possible closed valve. 2. Open valve ifclosed. 

### 3. Check fortrapped pressure; relieve trapped pressure SLOWLY ifpossible. Plugged Dump Line 1. Unscrew piping 

### and remove obstruction ifpossible. 2. Run coiled cleaner in line. 3. Check for trapped pressure; relieve trapped pressure 

### ! SLOWLY ifpossible. Liquid Carryover in I. Drain customer’s air or supply 

## gas. Scrubber High Pressure in IL. 

### Ensure pressure ofvessel being dumped into is lower Customer Tank or than pressure offluid being dumped. Scrubber Ifhigh scrubber level Mechanic. continues and you have taken all corrective steps, call



### 18

### Shutdown on High/Low Interstage Pressure Troubleshooting Guide 

# I POSSIBLE CAUSE CORRECTIVE ACTIONS

Faulty Valve or Rings I. Start and load unit. 

### 2. Use pyro scannerto check for hot valves orrings. 3. Repair or replace as needed. Gas Leak 1. Check for reliefvalve venting. 2. Ensure reliefvalve socks are in place. 3. Inspect reliefvalves forpossible malfunction.

j 

### 4. Reset or replace reliefvalves as needed.

: 

### Frozen Cooler or 1. Adjust louvers to waun gas.

Tubing to Panel Gauges 2. Inject methanol into tubing lines. Caution: Use extreme caution with methanol; high pressure may be trappedin tubing; wear appropriate ppe. 

### Faulty Gauges I. Use test gauge on interstage scrubberto test accuracy :• 

### against panel board gauge.

2. Calibrate or replace gauges and set kill. Dump Valves Hung in I. Ensure dump valves ae in closed position. Open Position 2. Set dump controller for proper. Load Change 1. Check reycle valve forproper operation; reset as needed. 2. Check meters for flow changes; set kill switch to proper setting.
Ifhigh/low interstage pressure continues and you have taken all corrective steps, call Mechanic.

19

## Shutdown on High/Low Discharge Pressure 

## Troubleshooting Guide
POSSIBLE CAUSE CORRECTIVE ACTIONS High Dehy or Rack 1. Check chart or meter 

### run for discharge pressure. Pressure 2. Ifhigh pressure, contact client to determine cause. Frozen Pipes or 1. Open blowdown to release discharge pressure to Equipment atmosphere. 2. Ifnothing exits blowdown, close louvers as needed to warm the cooler. 3. Check pressure on panel gauge to ensure pressure is released. 4. Check for frozen tubing lines:

• Disconnect tubing.

• Inject methanol into line. Caution: Use extreme caution with methanol; high pressure may be trapped in tubing. 5. 

### Warm pipes as needed. ReliefValve I. Check reliefvalve setting. Malfunction 2. Ensure reliefvalve socks are in place. 3. Repair or replace reliefvalve or socks as needed. Gauge Malfunction I. Use manometer (test gauge) to check panel gauges for malfunction. 2. Calibrate or replace gauges as needed Short in Wire in Panel I. Check panel:

• Ifpanel clears, load unit 

### and monitor closely.

. 

### Ifpanel does not clear, continue to next step. 2. Use volt meterto locate grounded wire. 3. Replace wire. Bad Valves or 1. Ensure temperatures and pressures 

### are within normal Compressor Ring ranges. 2. Iftemperatures 

### and pressures 

### are abnormal, inspect for bad valves, piston rings or piston. 3. Repair/replace parts as needed. Broken Piping 1. Inspect piping for leaks; repair/replace piping as needed. Recycle/Dump Valve I. Check recycle/dump valves; adjust as needed. Malfunction Ifhigh/low discharge pressure continues 

## and you have taken all corrective steps, call Mechanic.
20

### Shutdown on High Discharge Temperature Troubleshooting Guide POSSIBLE CAUSE CORRECTIVE ACTIONS Hot Valves 1. Load unit. 

### 2. Pyro scan 

### valve caps. 3. Repair or replace valves as needed. High Interstage 1. Check louver position on cooler. Temperature 2. Open louvers as needed to cool gas. 3. 

### Check cooler fins for dirt, dust or other obstructions. Faulty Gauges I. Use test gauges on suction/discharge pressure. 2. Calculate suction/dischargetemperatures. 3. 

### Calibrate orreplace gauges as needed. Inadequate Lubrication I. Check lubricator for proper cyliner lubrication. 2. Increase output or replace lubricator as needed. Cylinder Piston Ring I. Inspect cylinder piston rings. Damage 2. Replace piston rings as needed. Low Suction Pressure 1. Check recycle load changes; reset recycle valve. 2. Check suction pressure; calibrate discharge temperature and 

### set kill to proper setting. High Recycle Rate 1. Check recycle valve and flow. 2. Make adjustments as needed.



### Ifhigh discharge temperature continues and you have taken all corrective steps, call Mechanic.

21

### Altronic III Ignition Troubleshooting Guide

POSSIBLE CAUSE CORRECTIVE ACTIONS Faulty Harness Wire 1. Set volt ohm 

### meter to ohms. 2. Disconnectpower harness 

## from ignition module. 3. Thoroughly check each harness wire for continuity.

• Ifwires are 

### good, skip to “Faulty Mag Back.”

• Ifbad wire is found, change cannon Plug and 

### harness. 4. Start Unit. Ifunit 

### will not start, continue. 5. Check all terminals for proper grounding. 6. Replace bad electrical connections. Faulty Mag Back (Back 

### I. Set volt ohm 

### meter to DC and check voltage. Plates) Nose: Vollage shouldbe 150-190 DC

a 

### Ifvoltage does not meet requirements, change mag 

### back (back plates). 2. Start Unit. Ifunit will not start, call Mechanic. Bad Mag Back Drive 1. Check condition ofdrive gear teeth. 

### Gear 2. Ifteeth are missing, change figure 8. 3. Change coupling disc. 

### Broken Roll Pin in 1. Replace roll pin and damaged parts. 

### Figure 8 or Flange 2. Change mad drive adapter. Mount Oil in Magneto 1. Change seal ormagneto (bad mag drive seal on flange mount). Faulty Wires, Plug or I. Visually inspect all wires, plugs and coils. Coils 2. Replace any that are 

### damaged. Faulty Mag 1. Check for proper mag and 

### backs. 2. Check mag drive. 3. Repair or replace as needed.

22

## CEC Ignition Troubleshooting Guide

POSSIBLE CAUSE- COREECTIVEACTIONS Faulty Generator or I. Disconnect generator wires to regulator. Magneto Discs 2. Set volt 

### ohm meterto volts AC and check voltage.

• Ifvoltage meets requirements, skip to “Faulty Regulator.” 3. Check condition ofdrive 

### discs.

• Replace 

### discs as needed.

• If

### discs are 

### okay, replace generator. 4. Start unit. Ifengine will not start, continue to troubleshoot. Faulty Regulator 1. Reconnect wires from generator to regulator. 2. Disconnect -f/_ 

### wires from regulator to ignition module. 3. Roll engine over. 4. Set volt ohm meterto volts DC and check voltage out of regulator. Note: Voltage shouldbe 10-32 DC

. 

## Ifvoltage does not meet requirements ,change regulator. 5. 

### Startunit. Ifengine will not start, continue to troubleshoot. Faulty Harness Wire I. Set meterto 

### ohms. 2. Disconnectpower harness from ignition module. 3. Thoroughly check each harness wire for continuity.

• Ifwires are good. skip to “Faulty Harness or Ignition Module.”

• Ifbad wire is found, change cannon Plug and 

### harness. 4. Start unit.

• Ifengine will not start, continue to troubleshoot. Faulty Harness or I. Set meter to volts DC and check voltage. Ignition 

### Module Note: Voltage should be at least 120 volts DC 2. Ifvoltage doen not meet requirements, change ignition module. 3. Start unit. Ifengine will not start, notify Mechanic. Connection Box 

### Wire I. Inspect for loose wires orconnections. are Loose 2. Tighten or replace wires as 

### needed.

23

## APPENDIX 5 Spare Parts List

- 

## HOS 4 Spare Parts List

- 

## HOS 6

## SPARE PARTS LIST MeElmo Creek Spare Critical Machinery Equipment



## MeElmo Creek Unit HOS 4 Spare Parts List Compressor 

# f Compressor Suction/Discharge Valves 

## Ldi Filters

Lubricator Parts Electric Motor Driver Thermocouples Vibration Probes Cooler V-Belts Pulleys : Gaskets and Seal Pins Instruments 

### and Controls Temperature Switches Pressure Switches Instrument Tubing Position Indicators Pressure Gauges Thermometers

* 

### These parts are housed in a multipurpose building on site. The inventory ofspares is 

### maintained by 

### logging any part removed 

### arid initiating apurchase requisition to replace thepart.

## SPARE PARTS LIST
MeElmo Creek Unit HOS 6 Spare Parts List Compressor Compressor Suction/Discharge Valves Piston Rings Piston Rods Gaskets Packing Gland Assembly Crosshead Assembly Oil Filters Lubricator Parts Electric Motor Driver Thermocouples Vibration Probes Cooler V-Belts Pulleys Gaskets and Seal Pins ; 

### Instruments and Controls Temperature Switches Pressure Switches Instrument Tubing Position Indicators Pressure Gauges Thermometers

* 

### These parts are housed in a multipurpose building on site. The inventory ofspares is maintained by logging any part removed and initiating apurchase requisition to replace the part.

# APPENDIXB



# MCELMO CREEK UNIT ROOT CAUSE FAILURE ANALYSIS PROGRAM
McElmo Creek Unit Oil Production Facility PSD Permit Number:NU05-01

Thisdocument shall apply to and be binding upon the owner(s) and operator(s) of the McElmo Creek Unit Oil Production Facility, includingtheResolute Natural Resources Company

.McElmo Creek Unit Root Cause Failure Analysis PSD Permit No. NN05

-01 

### Root Cause Failure Analysis Program
Root Cause Failure Analysis Root cause failure analysis (RCFA) methodology is incorporated into the standard operating procedures in the McElmo Creek Unit field area. It provides a structured format in analyzing an event and helps to determine necessary measures to prevent future occurrences. The RCFA program includes the following components: Step 1 – Notification Field supervisor determines that an investigation is warranted and appoints personnel to conduct a root cause failure analysis for each Flaring Incident, except for those Flaring Incidents caused by scheduled maintenance or a CO2 

### breakthrough

. Step 2– Plan Investigation Once the decision is made to investigate a Flaring Incident, the investigator develops an investigation strategy. To do this an investigator can use the information initially available to develop a preliminary Snap Chart (see attachment). This will help the investigator understand what happened, identify areas where more information is needed, and identify conflicting information. For each of the causal factors (problems) on the Snap Chart, the investigator can rapidly consider the questions that need to be answered to identify root causes using the Root Cause Tree. With insight gained from using these two techniques, the investigator or the investigation team can plan the initial investigation strategy by:

• Identifying the key plant parameters and event times that need to be checked to verify the incident's sequence of events and technical accuracy.

• Identifying key pieces of evidence (broken parts, logbooks, chart recorders, computer printouts, etc.) that need to be collected and preserved.

• Requesting copies of the applicable procedures that should have been used during the incident.

• Selecting an initial group of individuals for interviews to fill in gaps in the information or to resolve conflicting information. Step 3 – Collect Information Collecting information (interviewing people and analyzing physical evidence) is an ongoing process throughout the investigation and crucial to understanding the incident and why it occurred. The investigator(s) are instructed to consult the TapRoot User Guides for each technique.McElmo Creek Unit Root Cause Failure Analysis PSD Permit No. NN05

-01



### Step 4– Determine Sequence of Events An investigator or team collects several people's perceptions of what happened during an incident and the problems that were associated with the activities and equipment during an incident. The investigator has to blend these various perceptions into the story of what happened. The best technique for doing this is the Snap Chart. A Snap Chart is an excellent graphic tool. In developing the Snap Chart, the investigator organizes the information being collected on a graphical chart to better understand it. This organization of the information often causes the re
-evaluation of assumptions or facts that conflict with other information. This organization also helps the investigator identify gaps in logic of what happened. When you have team investigations or if you are interviewing several people at one time, drawing a Snap Chart together helps facilitate gathering everyone's information and increases the effectiveness of meetings or group interviews. During individual interviews, the investigator may find it helpful to sketch a Snap Chart with the interviewee to verify their verbal communication. The investigator should keep a master Snap Chart updated as "facts" are verified. Step 5– Identify Incident's Causal Factors Once the sequence of the incident is thoroughly understood, the investigator needs to identify all the factors that, if eliminated, would have prevented the incident from occurring or would have significantly mitigated its consequences. These factors are called causal factors. Often investigators can identify the causal factors by simply inspecting the Snap Chart and asking, "If I could remove or correct the problems identified on this chart, which ones would prevent this incident from occurring or make it less severe?" A more formal technique is called Barrier Analysis and is used as an optional approach to identifying the causal factors (which in barrier analysis would be called broken barriers). In the next step, the investigator analyzes each causal factor for its root cause(s) using the Root Cause Tree. Step 6– Identify Root Causes Once the causal factors are identified, the next step is to identify the root causes. This is done using the Root Cause Tree. The Root Cause Tree User's Manual provides questions that help the investigator pinpoint the incident's root causes. The Human Performance Troubleshooting Guide on the Root Cause Tree helps an investigator decide which human performance related causes need further investigation. It also ensures that experienced investigators consider all potential causes of human performance difficulties (rather than just concentrating on the ones that they understand the best). In some cases, the root causes of an incident are impossible to identify. When the Root Cause Tree is used to analyze these difficult cases, the failure to identify the root cause is clear because the investigation stops before the lowest level on the Root Cause Tree is reached. A particular incident's specific root causes identified using the Root Cause Tree are used in the next two steps to identify programmatic causes and to develop/evaluate corrective actions.McElmo Creek Unit Root Cause Failure Analysis PSD Permit No. NN05

-01 

### Step 7– Identify Generic (Programmatic) Causes The specific causes for a particular incident may stem from more pervasive problems
- generic or programmatic causes. For example, if a particular incident is caused by a valve not having a label plate, other incidents may occur because of similar valve labeling problems with different valves. Therefore, the investigator needs to look at each specific cause for a particular incident and decide if a more program
-wide weakness exists that needs broader corrective action. Generic causes can be identified by investigating the pervasive nature of the problem. The pervasive nature of the problem can be determined by the investigator's experience, performing a special programmatic evaluation, or by reviewing previous incident statistics. Correcting generic problems can have a much broader impact on safety, environmental performance, and reliability since they address whole classes of problems rather than just the specific causes of an incident. Step 8– Develop Corrective Action The specific and generic causes that are identified in steps 6 and 7 provide a list of problems that require corrective action implemented in a timely manner. No matter what corrective action is proposed, there is always a chance to somehow circumvent the intent of the corrective action. Therefore, proposing corrective actions for each cause identified (that is, multiple corrective actions) provides a defense
-in
-depth to preventing the incident from recurring. In some cases, correcting a particular root cause may be too difficult. In these cases, the investigator should ensure that there are sufficient other corrective actions proposed to reduce the likelihood of the incident's recurrence. If the root cause level was reached in the incident investigation, the corrective actions are usually fairly straightforward to identify. If the investigator could not reach the root cause level, he/she will still need to develop ideas for corrective actions. If the incident has been identified as a repeat of a similar past incident, the investigator should ask if the corrective actions proposed are different from the corrective actions previouslytried and why the previous corrective actions failed. Investigators should work with line management as much as possible when developing corrective actions. They should have thoughtful consideration to ensure the corrective actions recommended are SMART: S - Specific M- Measurable A - Accountable R - Reasonable T - Timely The investigator should develop a Corrective Actions Matrix Table to use in conjunction with the Snap Chart for effective management presentations. The Corrective Actions Matrix should have headings as shown below: Causal Factors Root Causes & Generic Causes Corrective Actions Responsible Department & Person to Implement Due Date For Corrective Actions CompletionMcElmo Creek Unit Root Cause Failure Analysis PSD Permit No. NN05

-01



### Step 9– Report All of the information and analysis performed up to this point allows the investigator to write a clear, complete incident report describing what happened, why it happened, and what needs to be corrected to prevent the incident (or similar incident), and make effective management presentations. Reports and presentations are extremely important because the case made therein often determines whether the recommended corrective action is expeditiously implemented or is given a low priority and delayed indefinitely. An important part of incident reporting communication is the Snap Chart. A Snap Chart can be particularly helpful in providing an organized display of what happened and why it happened. When used with the Corrective Actions Matrix described in step 8, these two tools make a powerful presentation of much information in a short time to provide management with knowledge needed to make the best decisions about using resources to improve performance.

# ATTACHMENT

## Develop SnapCharT®
Get Started

- Determme what you are investigating Define sequence ofevents

- Identify missing or needed

information

- Investigate further to find missing

information Define causal factors



## Root Cause Analysis Analyze each Causal Factor’s Root Causes

- Analyze one Causal Factor at a

time

- begin at the top ofthe Tree and work

through the questions to determine what Basic Cause Categories apply

- Examine all ofthe Basic Cause

Categories that apply to determine what root causes apply Use the TapRoor® Root Cause Tree® Dictionary for definitions to all ofthe questions and root causes on the Root Cause Tree® 

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OCopynght 2000 by System Improvements Inc., Knoxville, TN. All Rights Reserved Worldwide. Duplication Prohibited.