Standbys. (Owner: Risk Management Section Supervisor)

BTCP/BTRF Standbys (Owner: Risk Management Section Supervisor) Site Safety Standard 5500 Introduction Scope The purpose of this standard is to specify detailed roles and responsibilities of Standby personnel required by permitting procedures. Table of Contents Topic See Page Introduction 1 Definitions 1 General s 2 Responsibilities 3 General Roles and Responsibilities Applicable to All Standbys 3 "Standby Specific" Roles and Responsibilities 5 Breathing Air Bottle Watch 5 Breathing Air Standby 6 Compressed Air Watch 6 Electrically Qualified Standby 7 Confined Space Entry Hazard Watch 7 Fire Watch 9 Hazard Watch 9 Process Watch 10 Definitions Acid Gas - A process stream that contains 20% (200,000 ppm) H 2 S. Combustible Combustible materials includes anything that will burn but is not readily ignited. Paper and wood are ideal examples of combustible materials. Flammable Flammable materials can easily catch fire under normal circumstances with a minimal ignition source. A single spark is sufficient. Propane, gasoline, kerosene are ideal examples of flammable materials. Immediately Dangerous to Life or Health (IDLH) - An atmosphere that poses an immediate threat to life, would cause irreversible adverse health effects, or would impair an individual s ability to escape from a dangerous atmosphere. Rev. 6, 09/16 Page 1 of 11

Standbys Site Safety Standard 5500 Definitions, Continued Standby - A person designated to monitor, control, and/or warn persons of hazardous or emergency conditions that could affect their safety. The term "Watch" is a type of Standby (e.g., Fire Watch). General s Item Determine if a Standby is Required 1 Anyone involved in the activation of the permit may determine the need for a Standby and the Standby requirements. The need for a Standby should be based on (1) permitting requirements and (2) an assessment of the potential hazards that could develop during the course of work. The types of Standbys are listed below: Breathing Air Bottle Watch Breathing Air Standby Compressed Air Watch Electrically Qualified Standby Entry Hazard Watch Fire Watch Hazard Watch Process Watch Permitting Responsibilities 2 As part of the permitting process, the Permit Recipient is responsible for: Discussing Standby requirements and expectations with the Standby. Ensuring that the Standby is qualified to serve in this position and understands his/her roles and responsibilities. Ensuring that the Standby understands precautions, potential changing conditions, hazardous materials and equipment in the area, and any other pertinent safety information applicable to the job being performed. This should include a discussion on both routine and emergency conditions. NOTE: The ExxonMobil Equipment Operator/FLS may choose to be involved in this discussion. Rev. 6, 09/16 Page 2 of 11

Standbys Site Safety Standard 5500 General s, Continued Item Permitting Responsibilities, Continued 3 If the Standby works for a different company than the Permit Recipient(s) for which they are providing standby duty, then the Standby must be issued a General Work Permit to perform their Standby duties. 4 The Standby(s) must sign the Standby section of the Permit. This is also required when the Standby works for a different company and has received their own General Work Permit to perform their Standby duties. Exception: Standbys not required as part of the permitting process must not sign on the permit. For example, if the permitted work group chooses to voluntarily wear Breathing Air when it is not required, the Breathing Air Standby and Breathing Air Bottle Watch (when hose line is used) must not sign on the permit. A Standby may perform Standby duties on more than one permit at one location if agreed to by all parties involved. 5 Only required Standbys may sign the Standby section of the Permit. Extra Standbys may not sign the Permit. 6 The Standby may not perform any other duty that would distract from his/her primary Standby responsibilities. However, one person may be used to perform two Standby functions as long as it will not prevent the person from being able to fulfill all the responsibilities of those functions. 7 The Standby must follow transfer procedures if replaced. See Permit Transfers in SSS-5200, Basic Permitting Principles. Responsibilities General Roles and Responsibilities Applicable to All Standbys 1 Understand the roles and responsibilities of the Standby and execute them accordingly. 2 Understand the job scope and the safety implications of the task to be done. Rev. 6, 09/16 Page 3 of 11

Standbys Site Safety Standard 5500 General Roles and Responsibilities Applicable to All Standbys, Continued 3 Arrange for, and understand, the methods of communications to be used at the job site (e.g. radios, horns, alarms, etc.). At a minimum, each Standby must: Have access to a radio at the job site that permits communication with a person who has access to an in-plant telephone to summon help (4-3600) in the event of an emergency. NOTE: 4-3600 is accessible only with the in-plant phone system; therefore mobile phones do not meet this requirement. Establish a clear understanding with the people working off the permit on the following: The methods that will be used to communicate with each other during the work (e.g. radios, horns, etc.) The method(s) that will be used to summon help in the event of an emergency Clearly understand how to promptly communicate the need for emergency assistance to ExxonMobil. Clearly communicate any job-related issues to the ExxonMobil person responsible for the area and/or equipment (this is the group that approves work on the equipment). 4 Clearly understand the unit/area alarms and the procedures/actions to take should they activate (e.g. evacuate personnel, etc.). 5 Ensure Standby equipment is in good working order. 6 Understand precautions, potential changing conditions, hazardous materials and equipment in the area, and any other pertinent safety information applicable to the job being performed. 7 Must be able to monitor entire area that may be impacted by the work being performed. As an example, if hot work is being performed at an elevation, the Standby must be able to monitor all locations that could be impacted by falling sparks. This may result in multiple Standbys being required. 8 Ensure applicable barricades are in place and prevent unauthorized entry. Rev. 6, 09/16 Page 4 of 11

Standbys Site Safety Standard 5500 General Roles and Responsibilities Applicable to All Standbys, Continued 9 Monitor the well being of all designated personnel. 10 Summon help in the event of an emergency. Assist in rescue only if authorized, trained, and qualified. 11 Rescue cannot be started in confined spaces or regulated areas until trained and qualified help has arrived. Breathing Air Bottle Watch "Standby Specific" Additional Roles and Responsibilities In addition to the General Roles and Responsibilities for all Standbys, each specific type of Standby must comply with the following additional Roles and Responsibilities. 1 Required for all work where Breathing Air hose line equipment is used. 2 Ensure an adequate air supply (including air pressure) is maintained to workers using hose line breathing air equipment. 3 Be stationed at the breathing air bottles. If a regulator manifold is employed, a Breathing Air Bottle Watch must be present at that location as well. NOTE: For Breathing Air supplied by an onsite compressor system (e.g. Cobra System) or tube trailer, a Breathing Air Bottle Watch is not required at the compressor or trailer, but there must be one at each regulator manifold. 4 Be knowledgeable of how to maintain air supply and the respiratory protection equipment in use. 5 Stop work and evacuate personnel if air pressure falls below the low-pressure alarm setpoint. Bottles may not be changed while personnel are working under breathing air (i.e. when using multiple bottles, all must be manifolded together and open at the same time). 6 Prevent fouling and tangling of airlines or lifelines. Rev. 6, 09/16 Page 5 of 11

Standbys Site Safety Standard 5500 "Standby Specific" Additional Roles and Breathing Air Standby 1 Required for all work where Breathing Air is mandatory. 2 Be trained and qualified to use Breathing Air apparatus. 3 Must have a radio on their person. For acid gas work, the radio must have the unit channel(s). 4 Have breathing air equipment ready for immediate use. If the atmosphere exceeds or is likely to exceed IDLH limits, the Standby must wear the breathing air equipment and have the mask attached to the regulator, ready for immediate donning. 5 Have a separate air supply. 6 Have breathing air equipment suitable for rescue depending on the equipment and potential for harm. 7 Ensure the correct tag with the inspection data is complete and attached to the breathing air bottle(s). All breathing air cylinders must be tagged indicating: Breathing Air Inspected for oxygen content (19.5-21%) Date of inspection Name of company performing the inspection Initials of person performing the inspection 8 Maintain visual contact with all affected parties at all times. 9 Prevent fouling and tangling of airlines or lifelines. Compressed Air Watch 1 Required when personnel are utilizing compressed air in conjunction with a loose-fitting face piece or hood-type helmet. Use of this equipment is typically limited to abrasive blasting type activities. 2 Monitor the compressor air monitoring system for high temperature or elevated carbon monoxide levels. 3 If elevated temperature or carbon monoxide is detected, shut off compressor and evacuate personnel from hood. 4 In the event of a high temperature or carbon monoxide, remove the compressor from service until the reason for the alarm is determined. Rev. 6, 09/16 Page 6 of 11

Standbys Site Safety Standard 5500 "Standby Specific" Additional Roles and Electrically Qualified Standby 1 See the following for the requirements of an Electrically Qualified Standby: MWP-6010 MWP-6011 MWP-6013 Confined Space Entry Hazard Watch 1 Required for all Entry Permits. 2 Know the hazards that may be faced during entry, including information on the mode, signs or symptoms, and consequences of the exposure. 3 Be aware of the possible effects on the behavior of entrants if exposed to any of the potential hazards in the space. 4 Continuously maintain an accurate count of entrants in the Confined Space and ensure the Entry Roster Form used to identify entrants accurately identifies who is in the Confined Space. Only the ExxonMobil Baytown Complex ENTRY ROSTER may be used. 5 Ensure all entrants comply with PPE requirments for entry into the space. 6 Remain outside the Confined Space at the point of entry during entry operations until relieved by another Entry Hazard Watch. 7 Communicate with entrants as necessary to monitor entrant status and to alert entrants of the need to evacuate the space. The space should be evacuated if one or more of the following occurs: Entry Hazard Watch detects a prohibited condition Entry Hazard Watch detects the behavioral effects of a hazard exposure on any entrant(s) Entry Hazard Watch detects a situation outside the space that could endanger the entrants, or Entry Hazard Watch cannot effectively and safely perform all the duties required of him/her Rev. 6, 09/16 Page 7 of 11

Standbys Site Safety Standard 5500 "Standby Specific" Additional Roles and Confined Space Entry Hazard Watch, Continued 8 Must have a working radio on their person. 9 Summon rescue and other emergency services as soon as the Entry Hazard Watch determines that entrants may need assistance to escape from Confined Space hazards. 10 Do not allow unauthorized persons to enter the Confined Space. If unauthorized personnel approach or enter a Confined Space: Warn the unauthorized persons that they must stay away from the Confined Space Advise the unauthorized persons they must exit immediately if they have entered the Confined Space Inform the Permit Recipient and the ExxonMobil Equipment Operator if unauthorized persons enter the Confined Space WARNING: THE STANDBY SHOULD NOT ATTEMPT A RESCUE THAT REQUIRES ENTRY INTO THE CONFINED SPACE. 11 Perform nonentry rescues only if specified in the Rescue PrePlan and trained/qualified to do so. 12 For OSHA Confined Spaces, the Entry Hazard Watch has these additional responsibilities: If entry is into a space that has or could potentially have IDLH conditions, the Entry Hazard Watch must maintain continuous visual contact with the entrants at all times. When an engulfment hazard exists, an Entry Hazard Watch must maintain either 100% line of sight or 100% video surveillance with the entrants exposed to the hazard. This Entry Hazard Watch shall have no other responsibilities. These requirements must be noted in the ADDITIONAL/SPECIAL PRECAUTIONS section of the permit. Rev. 6, 09/16 Page 8 of 11

Standbys Site Safety Standard 5500 "Standby Specific" Additional Roles and Fire Watch 1 Required when combustible or flammable materials that have a reasonable chance to be ignited by the type of Hot Work being performed have been identified within 35 feet of the hot work and they cannot be removed or eliminated. Considerations should be made when hot work is being performed on elevated platforms. 2 Must be at the job site during the hot work operation. 3 Must have fire-extinguishing equipment readily available and be trained in its use. 4 Inspect fire-extinguishing equipment and ensure it is in safe working order. 5 Observe the hot work operation and watch for fires in all exposed areas. 6 Extinguish fires only within the capacity of the equipment available. 7 Warn personnel performing the hot work of any fire conditions. 8 Be familiar with facilities for sounding an alarm in the event of a fire. 9 Warn others of any hazards associated with the hot work (e.g. hot metal or burn hazards). 10 A fire watch shall be maintained for at least a half hour after completion of welding or cutting operations to detect and extinguish possible smoldering fires if the potential exists (e.g., breaks, lunch, end of day). 11 Must have a radio on their person. Hazard Watch 1 Required when specific hazards are identified and monitoring of the situation will reduce potential for injury to personnel. 2 Be able to recognize the specific hazards for which they have monitoring responsibility. 3 Understand their expected response should any of the specific hazards are observed. Rev. 6, 09/16 Page 9 of 11

Standbys Site Safety Standard 5500 "Standby Specific" Additional Roles and Hazard Watch, Continued 4 A Hazard Watch that is monitoring the use of Motorized Equipment in support of Opening/Blinding work must do the following: Before work commences, establish the communication methods that will be used to notify the operator of the Motorized Equipment when the equipment must be shut down and to notify other members of the work group to evacuate the job site. Maintain contact with the Motorized Equipment Operator. Continuously monitor the gas testing equipment being used to detect potential LEL. Should LEL reach or exceed 5%, immediately do the following: o Instruct the Motorized Equipment Operator to shut down the equipment, and o Evacuate all personnel from the area. o Notify Process. 5 See MWP-6010 and MWP-6013 for the requirements of a Hazard Watch associated with electrical work. Process Watch 1 Required for initial opening/blinding of equipment that contains or has contained Acid Gas. 2 Must be an ExxonMobil Process employee of the area or unit owning the equipment. 3 Have knowledge of the system being opened. 4 Must be at the job site during the initial opening of the acid gas equipment. 5 Observe the personnel performing the initial opening. 6 Stop work and implement emergency mitigation measures in the event of a vapor release. Rev. 6, 09/16 Page 10 of 11

Standbys Site Safety Standard 5500 "Standby Specific" Additional Roles and Process Watch, Continued 7 Must have a radio on their person. The radio must have the unit channel(s). ** End of Site Safety Standard ** Rev. 6, 09/16 Page 11 of 11