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Petroleum Development Oman L.L.C.

MAF Effluent Treatment Plant-II Project

Document ID Health Risk Assessment (HRA)

Document Type

Security Restricted

Discipline

Document Owner

Month and Year of Issue March 16th. 2016

Version 2.0

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.

Document Authorisation

Document Owners Document Custodian

Pankaj Khanna, UIPT25

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)

Version

No.

Month & Year Author’s Name and

Title

Scope / Remarks

1.0 April 23th.

2015

Jose F.Petrizzo

Ref. Ind: MCOH1

Issued for DEFINE phase

2.0 March 16th.

2016

Jose F.Petrizzo

Ref. Ind: MCOH1

Reviewed because projects scope change

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

Table of Contents

0. Introduction to the HRA report _________________________________________________________ 5

1. HRA Scope _________________________________________________________________________ 5

2. HRA Team __________________________________________________________________________ 8

3. Remedial Actions ____________________________________________________________________ 9

4. Health Hazard Inventory and Detailed Risk Appraisals ____________________________________ 15

5. Generic Controls, Recovery Measures and Remedial Actions ______________________________ 26

6. Control statements for Low RAM Hazards ______________________________________________ 27

Appendix 1: Definitions ________________________________________________________________ 28

Appendix 2: Risk Assessment Matrix ____________________________________________________ 30

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 New Project Scope Diagrams

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

Input Provided By: Abu Bakar, Abdul Razak MSE41

Khanna, Pankaj UIPT25; Sweigart, John UIPT12; Mandhry, Ali UIPT333; Rawahi, Aziz UIPT332; Alawi Ali, MSE21; Haddabi Hamed, UIPT3; Pantazi, Lucian UIPT32 Bradoo, Deepak

3. Remedial Actions

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

PLANT-II PROJECT 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: Project Team (UIPT25)

+Operation+MCOH1

1 MAF EFFLUENT TREATMENT PLANT-II PROJECT

GENERIC RECOVERY MEASURES 1. Emergency / safety showers: Select safety showers/eye wash stations that have the capability to cool water during summer period. Date: Q1 2018 Responsible: Project Manager (UIPT25)


Sodium Hydroxide, Hydrochloric Acid

RAM: Medium

During bulk receiving or substance handling

1. Chemical transfer from drums to system must be performed with automatic (push on bottom) pumps.

2. Reinforce Chemical safety handling training Date: Q2 2018

Responsible Responsible: Project Team (UIPT25)

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

MAF EFFLUENT TREATMENT PLANT-II PROJECT

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 follow only applicable remedial actions stated in Human Factors Engineering Screening report issued in April 2015: DEP30.00.60.13, DEP30.00.60.18 and DEP30.00.60.21 Date: Q1 2018 Responsible: Project Manager (UIPT25)


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. Date: Q4 2016 Responsible: Project Manager (UIPT25)+ Deepak Bradoo

2. Ensure that separation distance between pumps is in

compliance with PDO SP-1127. Date: Q1 2018 Responsible: Project Manager (UIPT25)

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

MAF EFFLUENT TREATMENT PLANT-II PROJECT

Hazardous solid waste (chemicals,

hydrocarbons and heavy metals)

RAM: Medium

Production Operators have the potential for

exposure during supervision of contractor’s

solid waste removal from skip

1. Contractors must show competence for hazardous solid waste handling and disposal in accordance with governmental laws and regulations. Date: Q1 2018 Responsible: Project Manager (UIPT25)+ UIK43+MSE21

2. Ensure design allows the safe removal of solid waste. Date: Q1-2018 Responsible: Project Manager (UIPT25)


Visible light (too much; too little) -

wavelength 400 - 780 nm (non-ionizing

radiation)

RAM: Low All staff are potentially exposed to insufficient lighting and poor night time illumination of the plant and facilities.

1. Process design/equipment standards - Confirm design in accordance with HFE DEP’s and FEED Emergency lightning guideline (GU/705).

Date: Q4 2016

Responsible: Project Manager (UIPT25)

4. Health Hazard Inventory and Detailed Risk Appraisals

Work Area/Job MAF EFFLUENT TREATMENT PLANT-II 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.

Effective

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

Effective

Recovery Measures Effectiveness

Emergency response procedures - Emergency escape provisions included in facility design.

Effective

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

Remedial Actions Priority

Work Area MAF EFFLUENT TREATMENT PLANT-II PROJECT

Hazard Hazardous solid waste (chemicals: boron, phenols, selenium; metals:

barium, iron, lithium; heavy metals: arsenic, cadmium, chromium,

mercury; oil and grease)

RAM: Medium


Irritant to skin, eyes and respiratory tract. Acute poisoning. Neurological effects RAM: 3B


IARC 2B - Possible human carcinogens. Dermatitis. Other systemic symptoms regarding components. RAM: 3C

Scenario Production Operators have the potential exposure during supervision of contractors solids waste removal from the skip

Route & Form of Exposure

Contact, Dermal Solid


Exposure Limit


ALARP Status NO

ALARP Justification Controls need improvement

Controls Effectiveness

Containment / Isolation areas. Effective




1. Contractors must show competence for hazardous solid waste handling and disposal in accordance with government laws and regulations

2. Ensure design allows the safe removal of solid waste.

2


Hazard Caustics (Strong Alkalis: Sodium Hydroxide)

RAM: Medium


Corrosive to skin and eyes. Respiratory irritant, may cause pulmonary edema RAM: 3C


Corrosive effect on skin and respiratory system. RAM: 2B

Scenario During bulk receiving Route & Form of Exposure

Inhalation, Dermal Liquid


Exposure Limit


ALARP Status NO

ALARP Justification Verification of controls required


Tank truck hook ups will be provided to convey liquid sodium hydroxide directly into their respective holding tanks

Effective

Safety Manual, Written protocols Effective

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

Effective



Remedial Actions Priority 1. Chemical transfer from drums to system must be performed with

automatic (push on bottom) pumps. 1. Reinforce Chemical safety handling training

1


Hazard Acids (concentrated-inorganic liquids: Hydrochloric Acid)

RAM: Medium


Corrosive to skin and eyes. Respiratory irritant, may cause pulmonary edema RAM: 3C


IARC 1 - Human carcinogen classification for strong-inorganic-acid mists containing sulfuric acid. RAM: 4B

Scenario During bulk receiving Route & Form of Exposure

Inhalation, Dermal Liquid


Exposure Limit


ALARP Status NO

ALARP Justification Verification of controls required


Tank truck hook ups will be provided to convey liquid sulfuric acid directly into their respective holding tanks

Effective

Safety Manual, Written protocols Effective

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

Effective



Remedial Actions Priority 1. Chemical transfer from drums to system must be performed with

automatic (push on bottom) pumps. 1. Reinforce Chemical safety handling training

1


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


Exposure Limit


ALARP Status Yes ALARP Justification Controls in place Controls Effectiveness

PPE – Respirators and SCBA Effective





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.



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 (part of model review).

Effective




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

1


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.

Effective

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

Effective

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

Effective





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 Effective Personal bite prevention Effective Vector control measures - Periodic fumigation Effective Recovery Measures Effectiveness




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 has the potential to be exposed to the following Legionella sources: showers/ aerolised water, water from fire water systems, potable water, any scenario where ambient temperature water may become airborne and inhaled.


Inhalation Other


Exposure Limit


ALARP Status Yes ALARP Justification Project Controls in place, Legionella protocol to be applied once operation phase

starts Controls Effectiveness

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 potential sources of Legionella are identified, documented, assessed and a monitoring and control program defined.

Effective


Medical Facilities in place Effective



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


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

Effective

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

Effective

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

Effective

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.

Effective





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


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.

Effective





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).



Exposure Limit


ALARP Status NO

ALARP Justification Verification of controls


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

Effective


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

Effective



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

SP-1127.

1


Hazard Visible light (illumination - too much; too little) - wavelength 400 - 780 nm

(non-ionizing radiation)

RAM: Low


Eyestrain, headaches, decreased efficiency, increase in work errors. RAM: 1C


None known RAM:

Scenario All staff are potentially exposed to insufficient lighting and poor night time illumination of the plant and facilities.



Exposure Limit


ALARP Status NO

ALARP Justification Verification of controls


Process design/equipment standards - HFE screening completed to assess if a detailed survey was required.

Effective

Local Control - CCTV to reduce operator frequency of walkabout. Effective Recovery Measures Effectiveness



1. Process design/equipment standards - Confirm design in accordance with HFE DEP’s and FEED Emergency lightning guideline (GU/705).

2


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.

Effective

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

Effective


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

Effective


5. Generic Controls, Recovery Measures and Remedial Actions



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

Plant layout, bunding and drainage Effective

Implement area isolation Effective

Use standardized equipment and conventional technology To be reviewed

Energy efficiency in equipment & technology Effective

Incorporate Lessons learned Effective

Have experienced resources Effective

Automation of the facilities Effective

Proper training Effective


Safety Showers and eye wash To be reviewed

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

Effective


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

recovery measures and final ALARP conditions mentioned in this HRA.

1

RECOVERY MEASURES: 1. Emergency / safety showers: Select safety showers/eye wash stations that

have the capability to cool water during summer period.

1

6. Control statements for Low RAM Hazards

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

MAF EFFLUENT TREATMENT

PLANT-II PROJECT

Particulates (total, not classified)

No

Man made or synthetic vitreous fibers (MMF)

No

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

No

Sodium Hypochlorite No

Water softener salt (sodium chloride –NaCl)

No

Water with petroleum hydrocarbons

No

Solvents / Degreasers/ detergents [i.e. SHELLSOL D70, H)

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 and ABC powder No

Fungus/mold growth, or bioaerosols

No

Indoor climate No

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

Yes, see detailed appraisal

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

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 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.

Appendix 2: Risk Assessment Matrix