DRA_HP_MAF HRA

Printed: 14/10/2015 Printed copies of this document should be treated as information of temporary value and destroyed after use

Petroleum Development Oman L.L.C.

DRA Skid at Izki HP project

Document ID Health Risk Assessment (HRA)

Document Type

Security Restricted

Discipline HSE

Document Owner

Month and Year of Issue June 7th. 2015

Version 1.0

Keywords Occupational Health, Industrial Hygiene, Health hazards,

Document No

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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Document Authorisation

Document Owners Document Custodian

Petrizzo, Jose, MCOH1

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)

Parent Document(s)

Doc. No. Document Title

Version No.

Month & Year Author’s Name and Title

Scope / Remarks

1.0 Jose F.Petrizzo

Ref. Ind: MCOH1

Linked with SP-1231, 1230 and 1234

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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 ______________________________ 29

6. Control statements for Low RAM Hazards ______________________________________________ 30

Appendix 1: Definitions ________________________________________________________________ 19

Appendix 2: Risk Assessment Matrix ____________________________________________________ 22

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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

Based on the PB15 production forecast numbers, the MOL segment connecting between Nahada and Mina al Fahal (42 inch Nahada to High Point and 38 inch High Point to Mina al Fahal) is forecasted to face capacity restrains due to the increase in crude oil and condensate production. Drag Reduction Agent (DRA) injection has been introduced at Nahada to debottleneck the system as a short term solution. However, as Oman export blend is becoming heavier and more viscous, and as total Oman production of crude oil and condensate keep on increasing, DRA injection at Nahada efficiency will drop accordingly. Therefore, there is a need to study and evaluate the options of debottlenecking the MOL segment connecting NAH-HP-MAF. The possibility of minimizing the DRA injection at Nahada by introducing another DRA skid at High Point was studied. It was founded that DRA loses most of its efficiency due to the on-plan piping connecting the big traps at High Point. DRA injection can increase the capacity of the pipeline at a minimum cost. DRA has been introduced at Nahada to debottleneck the capacity restrains as a short term solution and it has since been successfully achieving the required drop in the pressure frictional loss. The concerns of not being able to achieve high overall drag reductions of, i.e. 19% (highest drag reduction requires in the next 10 years), between Nahada and MAF solely by injecting DRA at Nahada can be vanished by injecting DRA at High Point. Injecting DRA at both Nahada and High Point is estimated to cost about $16.6 million in the next 10 years. Therefore, this option has been chosen as the optimum solution to debottleneck the Nahada-HP-MAF MOL. Injecting through the pressure transmitter was found to be the most practical option as it has the lowest cost and risk. At the present, High Point location lacks basic infrastructure facilities, power and telecommunication. Both local suppliers Mazoon and Omantel were approached and they showed no objection to connecting the area with their services. The availability of these two infrastructure facilities will ease the execution of this project and future projects as well. The availability of infrastructure facilities suggests relocating High Point’s pressure transmitters from their current location 5km upstream High Point to the High Point location. This would improve the accuracy of the pressure readings. It would also help with monitoring and maintain the transmitters as this a common area that is supervised regularly.

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

Input Provided By: Ali Harthy, UIC11

Khalid Al Harthy, UIPT24; John Sweigart, UIPT12; Aziz Al Rawahi, UIPT332 Aniyan K, HSEA

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3. Remedial Actions

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

DRA Skid at Izki HP project

Psychological Hazards and Stress

High All staff 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.

1. Written procedure/Organization – Define challenge for current operations support for new unit and study feasibility of a third party contractor operational/maintenacesupport.

Date: Q1 2016 Responsible: Project Manager

1

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

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 HFE Strategies following all remedial actions stated in Human Factors Engineering Screening report issued in June 2015. Date: Q4-2015 to Q2-2016 Responsible: Project Manager

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

DRA Skid at Izki HP project DRA (polymer) RAM: Low

During bulk receiving or substance mixing

1. Reinforce Chemical safety handling training 2. Site verification is required to finalize the effectiveness

of controls.

Date: Q4-2015

Responsible: Project Manager +MCOH1

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4. Health Hazard Inventory and Detailed Risk Appraisals

Work Area/Job DRA SKID AT IZKI HP PROJECT

Hazard Crude oil RAM: Medium

Acute Potential Health Effects

Irritant to eyes, skin and respiratory tract. H2S effects: chemical asphyxiant causing respiratory paralysis, unconsciousness RAM: 4B

Chronic Potential Health Effects

IARC 1 - Human carcinogen, benzene may be present. RAM: 4C

Scenario During routine operations, sampling or maintenance task Route & Form of Exposure

Inhalation, Dermal, Splash Liquid

Frequency & Duration of Exposure

Exposure Limit Exposure Rating & Justification

ALARP Status Yes ALARP Justification controls in place Controls Effectiveness Process design/equipment standards - Good engineering design practice in accordance with CP117, GU611, SP1127, SP1190. The design of sampling equipment and sampling points to minimize personal exposure risks.

Hazard identification by signs/warnings/labels - Equipment and lines labeled in accordance with SP1284, SP1166 and DEP 30 00 60 21.

Recovery Measures Effectiveness Emergency response procedures - Emergency escape provisions included in facility design.

Medical Facilities in place, First Aid, Medical Emergency Response Plan Remedial Actions Priority

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Work Area DRA SKID AT IZKI HP PROJECT

Hazard Prochinor DR 200 (Drag reducer additives (DRA)) Non flammable liquid, water soluble, readily biodegradable RAM: Low


Mild Irritant to eyes, skin and respiratory tract. RAM: 2B


Not Known. RAM:

Scenario During bulk receiving and substance mixing Route & Form of Exposure

Inhalation, Dermal liquid



ALARP Status NO ALARP Justification Verification of controls required Controls Effectiveness Process design/equipment standards - engineering design practice in accordance with SP-1188. Transfer by pump, mixing by portable mixer.

Safety Manual, Written protocols 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

1. Reinforce Chemical safety handling training 2. Site verification is required to finalize the effectiveness of controls,

recovery measures and final ALARP conditions mentioned in this HRA.

2

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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

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 and manually manipulate controls.

Route & Form of Exposure



ALARP Status NO ALARP Justification Implementation of controls and Site review Controls Effectiveness 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 (part of model review).


1. Implement all HFE DEPs standards required and follow all remedial actions stated in Human Factors Engineering Screening report issued in April 2015

1

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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



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



ALARP Status Yes ALARP Justification No cases (prevalence) in last 6 years. Controls in place Controls Effectiveness Written procedure/safe work practice Personal bite prevention Vector control measures - Periodic fumigation Recovery Measures Effectiveness Medical Facilities in place, First Aid, Medical Emergency Response Plan Remedial Actions Priority

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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.




ALARP Status Yes ALARP Justification Controls in place Controls Effectiveness 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 Route & Form of Exposure



ALARP Status Yes ALARP Justification Controls in place Controls Effectiveness Process design/equipment standards - Plant layout makes provision for sheltered areas to provide relief from sun exposures.

Effective

Recovery Measures Effectiveness Medical Facilities in place, First Aid, Medical Emergency Response Plan Effective Remedial Actions Priority


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 have the potential for exposure to plant noise and equipment (transfer pumps).




ALARP Status Yes ALARP Justification Controls in place Controls Effectiveness Process design/equipment standards - Equipment sourced for emissions no greater than 85dB(A)


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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.




ALARP Status NO ALARP Justification Implementation of controls needed 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.

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

Remedial Actions Priority 1. Written procedure/Organization – Define challenge for current operations

support for new unit and study feasibility of a third party contractor operational/maintenacesupport.

1

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5. Generic Controls, Recovery Measures and Remedial Actions Work Area

DRA SKID AT IZKI HP PROJECT

Controls Effectiveness

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

Implement area isolation

Use standardized equipment and conventional technology

Energy efficiency in equipment & technology

Incorporate Lessons learned

Have experienced resources

Automation of the facilities

Proper training

Recovery Measures Effectiveness

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

Remedial Actions Priority

See section 3.

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6. Control statements for Low RAM Hazards

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

Hydrogen sulphide containing streams with H2S < 1000 ppm mole (600 mg/kg) and < 100 ppm vapour space

No

DRA Polymer YES SEE DETAILED APPRAISAL

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