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Petroleum Development Oman L.L.C.

MAF Firewater System Upgrade Project

Document ID Health Risk Assessment (HRA)

Document Type

Security Restricted

Discipline

Document Owner

Month and Year of Issue 9TH

. September. 2016

Version 1.0

Keywords Occupational Health, Industrial Hygiene, Health hazards,

Document No MAF-00-000000-HH-0709-00001-0000-MAF3D

Copyright: This document is the property of Petroleum Development Oman, LLC. Neither the whole nor

any part of this document may be disclosed to others or reproduced, stored in a retrieval system, or

transmitted in any form by any means (electronic, mechanical, reprographic recording or otherwise) without

prior written consent of the owner.

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Responsible RTA’s distribution list:

Revision History

The following is a brief summary of the four most recent revisions to this document. Details of all revisions

prior to these are held on file by the Document Custodian.

User Notes:

1. A controlled copy of the current version of this document is on PDO's live link. Before making reference to this document, it is the user's responsibility to ensure that any hard copy, or electronic copy, is current. For assistance, contact the Document Custodian.

2. Users are encouraged to participate in the ongoing improvement of this document by providing constructive feedback.

Related Business Processes & CMF Documents

Related Business Processes

Code Business Process (EPBM 4.0)

Name Function Signature

Riyami, Mohammed, UIK4 Production Chemistry

Jose Petrizzo MCOH1

Sr. IH

Naamani, Sultan, CTOG

Surface Production

Greenwood, Peter UOP11

Maintenance and Integrity

Abifarin, Olufemi, UIPT2P

Project Engineer

Version

No.

Month & Year Author’s Name and

Title

Scope / Remarks

1.0 9TH

.

September

2016

Jose F.Petrizzo

Ref. Ind: MCOH1

Issued for DEFINE phase

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Parent Document(s)

Doc. No. Document Title

Other Related CMF Document(s)

Doc. No. Document Title

SP-1194 Chemical Management

SP 1230 Medical Examination, Treatment and Facilities

SP-1231 Occupational Health

SP-1232 Public Health

SP-1234 Personal Protective Equipment

PR-1243 Medical Emergency Response

PR-1418 Reporting and investigation of HSE incidents (Incident Notification, Reporting

and Follow-up Procedure Part 1)

PR-2108 Fit testing for Respirator Users

PR-2109 Legionella Management Program

PR-2111 Manual Material Handling

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Table of Contents

0. Introduction to the HRA report _________________________________________________________ 5

1. HRA Scope _________________________________________________________________________ 5

2. HRA Team __________________________________________________________________________ 7

3. Remedial Actions ____________________________________________________________________ 8

4. Health Hazard Inventory and Detailed Risk Appraisals ____________________________________ 10

5. Generic Controls, Recovery Measures and Remedial Actions ______________________________ 22

6. Control statements for Low RAM Hazards ______________________________________________ 23

Appendix 1: Definitions ________________________________________________________________ 24

Appendix 2: Risk Assessment Matrix ____________________________________________________ 26

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0. Introduction to the HRA report

The Health Risk Assessment (HRA) report is used by PDO to process and store health related information. The report starts with a description of the scope of the HRA and the persons involved in sections 1 and 2. The remedial actions from the HRA are presented in report section 3, and are sorted by priority. Section 4 provides information from the detailed appraisals. The focus here is on High and Medium RAM rated risks. Section 5 provides an overview of generally applicable controls and recovery measures. Section 6 lists the status of the Low RAM rated risks that were reviewed during the HRA. The report concludes with definitions and a diagram of the RAM risk matrix in appendices 1 and 2.

1. HRA Project Scope

The existing MAF Area fire fighting system is over 40 years old and laden with frequent leakages

on the fire ring main as well as inherent equipment capacity shortfalls (e.g. existing firewater

pumps can only deliver 60% of their design capacity)

Considering the current use of seawater as firewater media, aggressive corrosion is noted in the

firewater system components such as valves, hydrants, foam skids, deluge nozzles etc. The crude

storage tank shells are highly susceptible to pitting corrosion in view of impingements from

seawater during tank cooling and deluge system testing and leakages due to failed valves.

The project objective is to upgrade the fire fighting system at the MAF Tank Farm Area. The

Project will replace the seawater firewater media with treated water, sourced from public water

supply. All existing GRE/CS piping ring mains will be replaced with GRE to ensure robustness of

system integrity

Scope Outline – Upper Tank Farm (UTF):

2 x New Firewater Pumps (n+1 principle) @544kW, 795m3/hr 2x New Jockey Pumps @7kW, 15m3/hr 1 x New Fire Water Tank of 6,150 m3 Replace existing 1 x Foam Skid Replace all fire water ring mains (w/GRE) including valves, Hydrants & Monitors. Inter-linking

Piping between UTF-LTF Scope Outline – Lower Tank Farm (LTF):

3 x New Firewater Pumps (n+1 principle) @483kW, 795m3/hr 2x New Jockey Pumps @7.8kW, 15m3/hr 2 x New Firewater Tank of 5,200 m3 Capacity 1 x New In-situ Concrete Fresh-water Top-up Tank of 1,000 m3 3 x New Pumps for tank filling @16.3kW, 20m3/hr Replace 4 x Foam Skids Replace all fire water ring mains (GRE) including valves, Hydrants & Monitors (LTF,PRA,

ETP..Etc.,) Inter-linking Piping between LTF-UTF.

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2. HRA Team

Responsible for HRA: Petrizzo, Jose MCOH1 – Sr. Industrial Hygienist

Input Provided By: AL Hinai Suleiman MCOH6 – Industrial Hygienist Wichakool, Pisak UEP1H10 Khosravi, Hamid UEP11H Farsi, Ali UEP141S Abifarin, Olufemi, UIPT2P

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3. Remedial Actions

Priority Work Area Hazard, RAM Rating and Scenario Recommended Remedial Action / Date / Resp. 1 MAF FIREWATER SYSTEM

UPGRADEPROJECT GENERIC CONTROLS 1. Site verification is required to finalize the

effectiveness of controls, recovery measures and final ALARP conditions mentioned in this HRA. Date: Q2 2018 Responsible: PT / /MCOH1

1

MAF FIREWATER SYSTEM UPGRADEPROJECT

Manual Handling - Lifting, Lowering,

carrying, pushing, pulling

Awkward Posture of the Shoulder, Neck,

Back (not associated with force)

Kneeling, Squatting, Standing on 1 leg,

Contact Stress on legs due low and high

walking displacement

Use of control Panel

RAM: Medium Operators, Maintenance and Technicians are required to move materials, open and close valves and manually manipulate controls.

1. Implement all HFE DEPs standards required by DCAF and follow only applicable remedial actions stated in Human Factors Engineering Screening report and strategy Date: Q2-2017 Responsible: FO-HSE HAMID UEP11H

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Priority Work Area Hazard, RAM Rating and Scenario Recommended Remedial Action / Date / Resp. 2 MAF FIREWATER SYSTEM

UPGRADEPROJECT Legionella bacteria (waterborne)

RAM: Medium All staff (on plot) has the potential to be exposed to the following Legionella sources: showers, aerolized water from fire water systems, and any scenario where ambient temperature water may become airborne and inhaled.

1. Review information about fire water design regarding aerosols, dead legs and stagnant water according to PDO PR-2109.

Date: March 2017

Responsible: FO- Project / Piping.

2 MAF FIREWATER SYSTEM UPGRADEPROJECT

Noise

RAM: Medium All staff working on process facilities have the potential for exposure to plant noise and equipment. Potential sources of noise in process facilities are transfer pumps

1. Ask vendor for SPL output new pumps characteristic and guarantee isolation to SPL output lower than 85 dB(A) Date: Feb 2017 Responsible: FO rotating

2. Ensure that separation distance between pumps is in

compliance with PDO SP-1127. Date: Dec 2016 Responsible: FO- Piping

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4.Health Hazard Inventory and Detailed Risk Appraisals

Work Area/Job MAF FIREWATER SYSTEM UPGRADE PROJECT

Hazard Diesel, Distillates, Gas Oils and Heating Oils

RAM: Medium

Acute Potential Health Effects

Slight irritant to eyes and on inhalation of mist RAM: 2C

Chronic Potential Health Effects

Defatting of the skin, dermatitis RAM: 3C

Scenario During filling or fuel replacement Route & Form of Exposure

Inhalation, Dermal, splash Liquid

Frequency & Duration of Exposure

Exposure Limit TWA: 100 mg/m3

Exposure Rating & Justification

ALARP Status Yes

Controls Effectiveness

Tank container with hose connection, closed system

Hazard identification by signs/warnings/labels - readily identifiable with labels, SHOC cards/SDS.

Recovery Measures Effectiveness

Medical Facilities in place, First Aid, Medical Emergency Response Plan

Remedial Actions Priority

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Hazard Batteries (Sulfuric Acid, sodium hydroxide lead inorganic, antimony)

RAM: Medium


Corrosive to skin and eyes. Respiratory irritant, may cause pulmonary edema RAM: 4C


Lead: IARC 2A - Probably human carcinogenic. Neurological, blood, kidney effects. Toxic to reproduction and development. RAM: 4C

Scenario During segregation Route & Form of Exposure

Inhalation, Dermal, Splash Liquid, solid


Exposure Limit According to specific substance see Reference in TLVs and BEIs ACGIH last version


Low (10%-50% OEL) Batteries are sealed

ALARP Status Yes ALARP Justification Controls in place Controls Effectiveness

Hazard identification by signs/warnings/labels - Where used as diluents, agent usually well labeled with either MSDS or SHOC cards or both.

Training and information on hazard - Adequate hazard information and training communicated to the workers.

Safety Manual, Written protocols: SP-1009




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Hazard Diesel exhaust

RAM: Medium


Irritant to eyes and respiratory tract RAM: 2C


IARC 2A Probably carcinogenic RAM: 4B

Scenario In field operations while equipment combustion Route & Form of Exposure

Inhalation fumes


Exposure Limit Shell OEL: 0.1 mg Elemental Carbon/m3, as respirable particulate



Local control – natural ventilation open spaces Recovery Measures Effectiveness



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Hazard Unknown chemicals during an emergency

RAM: Medium


Various including irritation, asphyxiation, burns (if corrosive) RAM: 4B


Dependant of the chemical potential damage (systemic, carcinogen). RAM: 4B

Scenario During an emergency (fire, reactions, combustion) Route & Form of Exposure

Inhalation Gas, Vapors and Fumes


Exposure Limit



PPE – Respirators and SCBA




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Work Area MAF FIREWATER SYSTEM UPGRADE PROJECT

Hazard Manual Handling - Lifting, Lowering, carrying, pushing, pulling

Awkward Posture of the Shoulder, Neck, Back (not associated with force)

Kneeling, Squatting, Standing on 1 leg, Contact Stress on legs due low

and high walking displacement

Use of control Panel

RAM: Medium


Acute strain or sprain to muscles and joints. Muscular fatigue or discomfort, may include numbness in the legs. Strain or sprain RAM: 3C


Chronic musculo-skeletal disorders. Lower body joint disorders RAM: 3D

Scenario Operators, Maintenance and Technicians are required to move materials, open and close valves, manually manipulate controls and computers.

Route & Form of Exposure


Exposure Limit


ALARP Status NO

ALARP Justification Verification of controls and Site review


Process design/equipment standards - Design include HFE DEP 30 00 60 10. 3D model reviews carried out for outdoor installations to identify and address ergonomic issues. Access to valves and sampling points included during HFE screening.




1. Implement all HFE DEPs standards required and follow all remedial actions stated in Human Factors Engineering Screening report issued in June 2016

1

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Work Area/Job MAF FIREWATER SYSTEM UPGRADEP ROJECT

Hazard Infectious and venomous animal bites

RAM: Medium


Severe wounds, tetanus, rabies, poisoning, acute renal failure and anaphylactic shock only for snakes RAM: 4B


None known RAM:

Scenario During outdoor activities Route & Form of Exposure

Dermal


Exposure Limit


ALARP Status Yes ALARP Justification No cases (prevalence) in last 6 years. Controls in place


Written procedure/safe work practice - Written site procedure discourages unauthorized night outing to minimize chance-meeting of reptiles.

Personal bite prevention - Workers are discouraged from night-time outings when reptiles are known to be more active.

Vector control measures - Periodic fumigation PPE-Skin protection: gloves, clothing - Safety booth provided, which minimizes exposed body parts.




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Hazard Insect, spiders, scorpions, bees

RAM: Medium


Irritation, inflammation, poisoning, anaphylactic shock RAM: 2D


Allergic reaction, secondary infection, RAM: 3C

Scenario During outdoors activities Route & Form of Exposure

Dermal


Exposure Limit


ALARP Status Yes ALARP Justification No cases (prevalence) in last 6 years. Controls in place


Written procedure/safe work practice Personal bite prevention Vector control measures - Periodic fumigation Recovery Measures Effectiveness



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Hazard Legionella bacteria (waterborne)

RAM: Medium


Pontiac fever (mildest form of infection); Legionnaires' disease - pneumonia (severest form of infection - may be fatal) RAM: 4B


Effects on lung function RAM: 3B

Scenario All staff (on plot and off plot) has the potential to be exposed to the following Legionella sources: showers/ aerolized water, water from fire water systems, potable water, any scenario where ambient temperature water may become airborne and inhaled.


Inhalation Aerosol


Exposure Limit PDO Action Level: 100 cfu/ml


ALARP Status NO

ALARP Justification Design verification of controls


Written procedure/safe work practice - PDO Legionella management procedure is in place, ready for implementation. The procedure requires that water systems and equipment that are a potential source of Legionella is identified, documented, assessed and a monitoring and control program defined.




1. Review information about fire water design regarding aerosols, dead legs and stagnant water according to PDO PR-2109.

2

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Hazard Heat Stress / Hot Temperature Differentials

RAM: Medium


Heat stroke leading to death (lesser symptoms: exhaustion, cramps, rash, fatigue) RAM: 4B


Dermatitis RAM: 2C

Scenario Working with BA (breathing apparatus) and confined space entry work presents an additional risk factor due to the increased metabolic rate due to PPE load.



Exposure Limit PDO SP 1231



Process design/equipment standards - Design makes provision for separate resting areas with AC and fresh, cool water supply

Fitness to Work - Medical fitness to work standards has been established for users of BA sets.

Training and information on hazard - Processes and procedures in place for effective supervision.

Administrative controls, such as area restrictions and limited schedules - Provisions made for shaded areas and cool drinking water. Offices with AC are available on plot, for example the Central Control Room.




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Hazard Ultra violet light (UV) - wavelength 100 - 400 nm (non-ionizing radiation)

RAM: Medium


Skin burns, erythema (reddening of the skin) and darkening of the skin. Photokeratitis (painful condition caused by the inflammation of the cornea of the eye). Conjunctivitis (inflammation of the conjunctiva) . Eye disorders with pain and discomfort ("flash burn", "arc eye") RAM: 2C


IARC 1 - Human carcinogen (skin cancer). Skin aging. May cause pterygium, cataracts and macular degeneration RAM: 4B

Scenario All staff is partially exposed to direct sun in hot/humidity weather



Exposure Limit See ACGIH last version


ALARP Status Yes

ALARP Justification Controls in place


Process design/equipment standards - Plant layout makes provision for sheltered areas to provide relief from sun exposures.




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Hazard Noise

RAM: Medium


Loud steady noise: temporary threshold shift. Impact noise: rupture of eardrum; acoustic trauma. RAM: 2C


Noise induced hearing loss (permanent threshold shift); tinnitus (ringing in ears) RAM: 2D

Scenario All staff working on process facilities has the potential for exposure to plant noise and equipment (transfer pumps).



Exposure Limit 85 dB(A)


ALARP Status NO

ALARP Justification Verification of controls


Process design/equipment standards - Equipment sourced for emissions no greater than 85dB(A)


Event-based: IH monitoring - Noise mapping during commission - Company hearing conservation plan implemented for areas exceeding 85dB(A).



1. Ask vendor for SPL output pumps characteristic. 2. Ensure that separation distance between pumps is in compliance with PDO

SP-1127.

1

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Hazard Psychological Hazards and Stress

RAM: High


Stress symptoms like headaches, high blood pressure, sleep disturbance, irritability, Chest pain, Difficulty breathing, Severe pain, Symptoms of shock (shallow breathing, rapid or weak pulse, nausea, shivering, pale and moist skin, mental confusion, and dilated pupils), Fatigue, Nausea/vomiting, Dizziness, Profuse sweating, Thirst, Visual difficulties, Clenching of jaw, Nonspecific aches and pains RAM: 2D


Anxiety, depression, severe gastrointestinal symptoms, heart attack RAM: 4D

Scenario All staff (on and off plot) have the potential to experience isolation from family and friends, especially those on rotational duty; working on dead-lines, pressure owning to the nature of the work environment is inherent.



Exposure Limit


ALARP Status Yes ALARP Justification Projects Controls in place, Stress control program to be implemented once

operation Phase starts Controls Effectiveness

Stress - generic organizational controls - Clear organizational structure with adequate human resources.

Local Control - Good camp, welfare and sport facilities. No overcrowding in facilities or in accommodations.


Stress - generic recovery measures - Employee assistance program (call centre during office hours).


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5. Generic Controls, Recovery Measures and Remedial Actions

Work Area MAF FIREWATER SYSTEM UPGRADEPROJECT


Regulations, standards, specifications and procedures to be applied to the project To be reviewed

Plant layout, bunding and drainage

Implement area isolation

Use standardized equipment and conventional technology To be reviewed

Energy efficiency in equipment & technology

Incorporate Lessons learned

Have experienced resources

Automation of the facilities

Proper training


Safety Showers and eye wash To be reviewed

Recovery from hazardous events, fire & gas detection, fire response, ESD, blowdown, escape and evacuation


CONTROLS: 1. Site verification is required to finalize the effectiveness of controls,

recovery measures and final ALARP conditions mentioned in this HRA.

1

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6. Control statements for Low RAM Hazards

Work Area/Job Hazard CONTROLS NEED IMPROVEMENT? MORE DETAILED ASSESSMENT?

MAF FIREWATER SYSTEM

UPGRADEPROJECT

Particulates (total, not classified)

No

Man made or synthetic vitreous fibers (MMF)

No

Biocides No

Lubricating Oils, C16-C35 Hydrocarbons (includes oil mist and glycerin), Greases (< 3%PCAH Content), dielectric oils and Hydraulic and heat transfer fluids

No

Fire foam No

Fungus/mold growth, or bioaerosols

No

Indoor climate No

Visible light (illumination - too much; too little) - wavelength 400 - 780 nm (non-ionizing radiation)

No

Extremely Low Frequency magnetic radiation (ELF) - wavelength: > 30 km (non-ionizing radiation)

No

Radiowave/Microwave radiation - wavelength 1 mm - 30 km (non-ionizing radiation)

No

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Appendix 1: Definitions Acute Health Effect Health Effect that occurs immediately or a short time (seconds to hours) following exposure, such as heat stroke, chemical burns and asphyxiation. Agent See Hazard ALARP - As Low As Reasonably Practicable The point at which the cost (in time, money and effort) of further Risk reduction is grossly disproportionate to the Risk reduction achieved. Barrier A Risk Control or a Recovery Measure. Barriers provide the means of preventing an Event or Incident, or of mitigating the Consequences. A Barrier can be an item of equipment or a human intervention, and can also be a Control on an Escalation Factor. Chronic Health Effect Health Effect that occurs gradually over a long period of time (months or years), generally following repeated and prolonged exposure. In specific cases a short term exposure may result in a chronic health effect. Consequence An Effect on people, assets, the environment or reputation as a result of a Hazard being released. Control A means of preventing an Incident. Controls can be engineering, procedural or behavioural. Critical Activity An activity necessary for the development, implementation or maintenance of a Barrier established for managing Hazards with RAM red Risks. Effect The Consequence of the release of a Hazard. Escalation Factor A situation, condition or circumstance that may lead to the partial or full failure of a Barrier. Event An Incident that occurs when a Hazard is released. Exposure Limit The airborne concentration of chemical agents and levels of physical agents to which nearly all workers may be repeatedly exposed day after day without adverse Effect. Exposure Rating The chance of over-exposure to a health hazard when compared against agreed control standards. The exposure rating is evaluated as Very Low, Low, Medium or High. Hazard An agent with the potential to cause harm to people, damage to Assets, or an Impact on the environment or reputation. Health Hazard A factor of a physical, chemical, biological, ergonomic or psychological nature with the potential to cause harm to the health of people. HRA - Health Risk Assessment

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A process of identifying, evaluating, controlling and managing Health Risks, associated with work to prevent acute and chronic health Effects. Incident An unplanned Event or chain of Events that has, or could have, resulted in injury or illness or damage to Assets, the environment or reputation. Likelihood The probability that a specified Consequence will happen. OEL – Occupational Exposure Limit The airborne concentration of chemical agents and levels of physical agents to which nearly all workers may be repeatedly exposed day after day without adverse effect. RAM - Risk Assessment Matrix A tool used to assess the Consequences and Risks of Hazards to HSSE. The results are referred to as a RAM Severity rating and a RAM Risk rating. Recovery Measure A Barrier that reduces the Consequences of the release of a Hazard as a result of an Incident. Recovery Measures can be engineering, procedural or behavioural measures. Remedial Action Plan RAP - A Plan to implement corrective action items. Risk The combination of the Consequence of a specific Hazard being released and the Likelihood of it happening. Risk Assessment The process of identifying the Consequences of the Worst Case Credible Scenario arising from the release of a Hazard, and estimating the Likelihood of that scenario. Severity A level of Consequence on the RAM on a scale of 0 to 5. TBD To be determined.

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Appendix 2: Risk Assessment Matrix