TRA Drilling ActivityHalini Oil FieldMari Petroleum Company Ltd Task Risk Assessment WorksheetFacility: Halini Oil FieldOrig. Issue Date: March 31, 2013Revision Date: August 01, 2014TRA # : Halini-HSE-03Page:1 of 1Work Group Preparing TRA: ProductionSupervisor: (Name & Position) Ghulam Murshad (I/C) / Muhammad Ibrahim (Chem Engr) / Muhammad Imran Khan(Prod Engr)Description of work activities:Confined Space EntrySOP Ref # (If applicable)List unusual physical or operational factors, existing or expected during this tour, which will cause a departure from or changes to the content below with this TRAList the measures to be taken in recognition of the points mentioned above:L - LIKELIHOODS - SEVERITYOverall RiskR- SEVERITY RATINGLow RiskMCIManage for Continuous ImprovementIRRMIncorporate Risk Reduction MeasuresIIntolerableIS THERE A SAFER WAY TO COMPLETE THE JOB? ARE THERE ALTERNATIVES WITH LESS RISK?No.ActivityHazardRiskSteps to Lower RiskOverall RiskLSR1Working in Confined SpaceUnsafe Oxygen Levels:1. Oxygen levels inside a confined space may fall below a safe level (19.5%) due to chemical or biological reactions. Situations which may bring these reactions, and thus oxygen deficiency, include: 1. combustion of flammable substances (such as welding, heating or cutting); 2. slow bacterial reactions of organic substances (the contents of a sewerage pit); 3. reaction of inorganic substances (rust forming on the inside of metal surface); 4. displacing oxygen with another gas (e.g. nitrogen used to remove flammable or toxic fumes); and 5. high oxygen consumption rate (e.g. many people working in a small confined space).B3I1. Ensure the confined space is free from any flammable / toxic atmosphere and has sufficient oxygen for normal breathing.2. Where appropriate test the atmosphere for lack of oxygen or flammable with Portable Multi-Gas Monitor.MCIFlammable & Explosive AtmospheresProcesses that can form an explosive air-vapour mix in confined spaces include:1. A common source of explosive atmospheres is residue left over in tanks or containers. Although the container may appear to be completely empty, small quantities of flammable liquid can become trapped and evaporate to form an explosive air-vapour mix;2. spray painting;3. cleaning with solvents;4. leaking material from pipes, fittings or valves; or chemical reactions which produce flammable gases or vapours5. electrical arcing from incorrectly installed wires or electrically overloaded fittingsB3IRRM1. Ensure the confined space is flushed, purged and thoroughly ventilated as required. 2. Ensure the Confined Space is positively isolated from all sources of energy (hydraulic, pneumatic, electrical etc.) 2. Ensure the work to be carried out inside the Confined Space fulfill the Permit to Work requirement for the type of work. 3. Ensure Portable Fire ExtinguisherMCIPoor footing, trip hazards, fall hazardsA4IRRM1. Note all areas where the potential for falls may occur and ensure the fall protection appears sound before approaching the area.2. Inspect ladders prior to their use and use safety equipment when needed.3. Use proper PPEs.MCILack of CommunicationC2IRRM1. Plan the work involving personnel responsible for preparation (isolation, depressurization, draining, venting, flushing, purging, gas testing etc) of confined space. 2. 1. Place a Standby Person at manhole to maintain contact with the entrant and record entry / exit.MCIPressurized FluidA3MCI1. Ensure the confined is depressurized & content is drained safely.MCIEntrapment or Collapse of EntrantA4MCI1. Ensure availability of full body harness & lifeline etc for emergency retrieval of personnel from Confined SpaceMCIMSF-IMS-07-03

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Sheet11. There should be a separate earthing conductor, unless the equipment requires only a welding return cable. Lack of an earthing conductor can give an increased risk of electric shock.2. All welding cables, electrode holders, welding torches and guns, wire feed units, etc., should be in good condition and properly insulated. Any piece of equipment that is damaged or unsafe gives a potentially high risk of electric shock and should not be used until it is repaired and made safe.

3. There should be an easily accessible means of switching off the welding power source at the mains, in the event of an emergency. If there is no means of switching it off and a fault occurs, it may not be possible to isolate an electrical problem, giving an increased risk of electric shock, burn or fire.4. Ensuring that all electrical equipment is installed properly, in accordance with regulations, and is maintained in good condition are the normal control measures taken to prevent electrical incidents. Welders should never remove panels from welding power sources and should always get a qualified electrician to investigate faults in electrical equipment.5. Wearing dry leather gloves, insulated footwear and other appropriate protective clothing is a practical risk control measure that can be taken by individual welders to reduce the risk of electric shock.