Aramco Standards-B-4 & 5 for H2S-2013

Section B / General Requirements D&WO HSE Requirements Manual

B-4

Respiratory Protection

SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4 / Respiratory Protection (RP) 1. The Rig Operator shall ensure that all respiratory protection equipment is provided. Those employees required to use this equipment shall be trained in its effective use. This training SHALL include: A. The need for respirator protection. B. An explanation of why a particular type of respirator has been selected. C. An explanation of the operation, capabilities and limitations of the respirator selected. D. Fitting of face pieces. E. Donning (putting on) and doffing (taking off) of respirators. F. Regulations concerning respirator use. G. Instructions in emergency procedures. H. Maintenance, inspection and storage of respirators. I.

Sealing and functioning of the face piece.

This equipment may be provided by the Contractor or by the Company, depending upon the terms and conditions of the contract. 2. The Rig Operator shall ensure that the required respiratory protection equipment is maintained and used as intended, and that it provides all personnel with adequate protection against all anticipated hazardous atmospheres. 3. Such respiratory protection equipment shall be readily available, maintained in good working order, in a sanitary condition, and inspected every 30 days per G.I. 1780.001. Respirator inspection shall include: A. A check for tightness of connections. B. The condition of the respiratory inlet covering, head harness, valves, connecting tubes, harness assemblies and hoses. C. The proper function of regulators and alarms. D. Each rubber or other elastomeric part shall be inspected for pliability and signs of deterioration. E. Each air cylinder shall be inspected to ensure that it is fully charged and with a current hydro-test date. F. A record of inspection dates shall be kept for each respirator maintained for Emergency or rescue use. SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4/RP/Continued 4. Parts Replacement and Repair A. Only technicians certified in the proper respirator maintenance and overhaul shall do replacement of parts and repair. B. Replacement parts shall be only those designated for the specific respirator.

5. All Self Contained Breathing Apparatus (SCBA): A. Compliant 15-Min and 30-Min SCBA. B. Or hose-line work masks, including an emergency escape cylinder. C. Unless protected by respiratory protection equipment, no personnel shall be allowed to enter any area: 1) Where the oxygen content of the atmosphere is less than 20.9 % by volume. 2) Or where the atmosphere is contaminated or in danger of being contaminated by any airborne substance that may be considered to be harmful.

6. On all D&WO rigs operating in known Hydrogen Sulphide (H2S) areas or on any rig drilling a wildcat well, there shall be on each rig at least the minimum amount of respiratory protection equipment required in the drilling/workover contract.

7. Where respiratory protection equipment is or may be required to be worn in areas which are or may be contaminated with substances immediately dangerous to life or health, a clean shaven policy shall be implemented. Facial hair that interferes with the seal of a face mask will adversely affect the duration of SCBA. Note: Refer to HSERM/B/B-4/RP/Appendix No.1, for further information regarding Respiratory Protective Equipment. 8. Definitions, Abbreviations and Acronyms: Refer to HSERM/A/A-1/DA&A.

9. References: Refer to HSERM/A/A-2/Reference Material.

SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4/RP/Continued Appendix No.1 Requirement for minimal acceptable Respiratory Protection Program 1. Each Rig Operator shall develop and put into practice a respiratory protection program that meets or exceeds the following criteria (per G.I. 1780.001): A. Written standard operating procedures governing the selection and use of respiratory protective equipment. B. Respiratory protective equipment shall be selected on the basis of the hazards to which the worker is exposed. The airborne hazards most likely to be encountered in drilling and Workover operations are: 1) Immediately dangerous to life or health (IDLH) atmospheres that require the use of supplied-air respiratory protection equipment. This equipment includes the hose-line work masks, including an escape cylinder, and self-contained breathing apparatus (SCBA). The most likely IDLH atmospheres that may be encountered at drilling and workover locations are: a. Toxic vapors and gases, such as H2S. b. Atmospheres containing less than 20 % oxygen, by volume. 2) Corrosive or irritating particulate matter for which full-face filter mask protection is required. It is imperative that the correct filters be identified and used. C. The user shall be instructed and trained by the Rig Operator in the correct use of respiratory protective equipment and their limitations. This training shall include: 1) Instructions on the selection of the proper respiratory protection equipment for each potential hazard an employee may encounter. 2) Instructions in the wearing and use of this equipment. This training SHALL include drills in which the equipment is used and worn under simulated emergency conditions. (BOP drills while wearing work masks, for instance.) 3) Proper cleaning and sanitizing of the equipment after it is worn and used. It is very important each user of this equipment understands how important it is to properly clean and sanitize this equipment after each wearing, even for equipment that may be permanently assigned to him. D. Where possible, respiratory protective equipment should be assigned to individual workers for their exclusive use. E. Respiratory protective equipment shall be regularly cleaned and disinfected. Those issued for the exclusive use of one worker are to be cleaned after each day’s use or more after if necessary, those used by more than one worker are to be thoroughly cleaned is of paramount importance. SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4/RP/Appendix No.1/Continued F. A comprehensive Cascade BA System and SCBA Registry shall be developed and maintained on every rig. The minimum required Registry information shall include location, serial number, MAWP, Hydro-test Date, Next Hydro-test Date, Inspection Date, Next Inspection Date, and SCBA Mask Voice Communication Device equipped. G. A detailed Maintenance/Inspection Registry shall be maintained by the Rig Operator for each SCBA, the Registry shall include; I.D. number of the unit, its location, monthly inspection records, cylinder pressure on inspection, Face Mask Voice Communication Device Operability, Voice Communication Device Battery Installation Date, Voice Communication Device Battery Replacement Date, cleaning and maintenance of respiratory protective equipment. (Example: HSERM/B/B-4/RP/Appendix No.1/Figure No.1).

Figure 1

H. Respiratory protective equipment shall be inspected during cleaning. Worn or deteriorated parts shall be replaced; all replaced parts shall be recorded in the SCBA log book. Respiratory protective equipment for emergency use, such as self-contained devices, shall be thoroughly inspected by the Rig Operator at least once a month and after each use. Every rig inspection shall include: 1) A function test. 2) Confirmation of cylinder hydrostatic test date; every 3 years for composite cylinders and every 5 years for steel cylinders. 3) Condition of cylinder. 4) Condition of all hoses (both low pressure and high pressure).

SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4/RP/Appendix No.1/Continued 5) Condition of straps and buckles. 6) Condition of back plate. 7) Condition of cascade hose connection. 8) Integrated Face Mask Voice Communication Device Operability I.

Appropriate surveillance of work area conditions and the degree of employee exposure or stress shall be maintained. The Rig Operator is responsible for knowing what respiratory exposures may be present and shall alert all personnel when protective equipment is required. The level of exposure to a given substance is determined by continuous area monitoring, personal monitoring and warning devices, or from studying the Material Safety Data Sheets (MSDS) for each substance used on the location, The Rig Operator is responsible for requiring the use of the proper equipment at all times when exposure limits exceed acceptable limits.

J. There shall be regular inspection and evaluation to determine the continued effectiveness of the program. The Rig Operator is responsible for his respirator protection program. In meeting that responsibility a Rig Operator shall know that all equipment is in good condition and is ready for use when needed. A part of every planned inspection shall be to evaluate the state of the entire respiratory protection program of each location visited. K. Personnel should not be assigned to tasks requiring the use of respiratory protective equipment unless it has been determined that they are physically able to work while wearing the equipment. L. Compressed air used for breathing purposes shall comply with the standards recommended in G.I. 1780.001 and HSERM/B/B-4/RP/Appendix No.1/Figure No.3.

2. Compressors The Compressors for Supplying Breathing Air Should Meet the Requirements of G.I.1780.001. A. Oil Lubricated Breathing air compressors shall be equipped with necessary safety and standby devices. As a minimum, an OEM Compressor Continuous Carbon Monoxide Monitoring/Shutdown System and H2S Detection (5ppm)/Shutdown System shall be fitted to each compressor and automatically shut down the compressor to prevent contamination of stored air (5ppm). The OEM Compressor Continuous Carbon Monoxide Monitoring/Shutdown System shall automatically shut down the compressor when 5ppm carbon monoxide is detected (reference NFPA 1989). B. All compressors shall have a minimum ambient operating temperature rating of no less than 50°C. C. Breathing air compressors shall be strategically positioned so as to minimize the potential entry of contaminated air. Specific contaminated air hazard sources include but are not limited to Main Engine and E-Gen Exhaust Stacks, Galley Hood Exhaust Stacks, and Wire Line Unit Exhaust. D. They shall be equipped with purifying sorbet beds and filters to further assure greater air quality. E. They shall be equipped with alarms to indicate compressor failure and/or overheating. SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4/RP/Appendix 1/Continued F. They shall be equipped with OEM shop set and certified RVs which are included in the rig RV Registry and inspection process. G. Breathing Air Compressors shall be “Manually Start” and are specifically prohibited from having any Automatic Start Features and shall be continuously manned during all periods of operation. H. Breathing air compressors shall have a detailed maintenance log that records information as shown in HSERM/B/B-4/RP/Appendix No.1/Figure No.2.

Figure No.2

I.

Each Rig shall maintain an air purity test kit and conduct weekly air purity sampling for CO2, H2O, and Oil Mist prior to recharging the cascade breathing air cylinders, following the required H2S release drill and after every H2S alarm.

J. Air samples from the breathing air compressor shall be tested, at least once in every three months, by SA Laboratories to ensure the air quality continues to meet the following air purity standards:

SA-DWO-HSERM-GR-002 / Created: 01/13 / Last Review: 01/13 / Next Review: 01/17 Owner: VP-D&WO Revision(s) identified by a Vertical Bar in the Right Margin

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Section B / General Requirements D&WO HSE Requirements Manual B-4/RP/Appendix No.1/Continued 3. Air Purity Standards Limits have been established for breathing air quality. Air suitable for human respiration shall meet minimum standards as established by various governing bodies, including the Compressed Gas Association (C.G.A). HSERM/“B”/B-4/RP/Appendix No.1/Figure No.3 provides the maximum allowable contaminant allowed under the C.G.A. standard.

Figure No.3

Component C.G.A. Standard Oxygen % by volume 19 - 23% Carbon Dioxide,