Project ID: SOM000MM0612 Health Risk Assessment Report€¦ · New Condensate flash vessels to...

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Printed: 29/11/2017 Printed copies of this document should be treated as information of temporary value and destroyed after use

MMPS Gas Compression & Evacuation Facility

Project - CPD Core Scope

Project ID: SOM000MM0612

Health Risk Assessment Report

MAR-24-000000-HX-5798-00001-0000

Revision Record

01 14/09/2017 Project scope

updated and

two new

hazards

included

Mohamed Al

Busaidi MCOH5

Kidile, Shekhar

OSEM21

Jose Petrizzo

MCOH1

Rev. Date Reason for

Issue

Originator Checker/ owner Approver/custodian

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Printed copies of this document should be treated as information of temporary value and destroyed after use Printed: 29/11/2017

Responsible RTA’s distribution list:

Hold Record

Specify any outstanding issues in the document

Hold No. Section Description of Hold

Revision Tracking

Specify significant changes from previous revisions of the document (sorted by date)

Rev. Date Description of Revision

01 24/08/2017 Project scope updated and two new hazards

included

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.

Name Function Signature

Kidile, Shekhar OSEM21 Project manager

Jose Petrizzo MCOH1

Sr. IH

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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Table of Contents

0. INTRODUCTION TO THE HRA REPORT 4

1. HRA SCOPE 4

2. HRA TEAM 7

3. REMEDIAL ACTIONS 8

4. HEALTH HAZARD INVENTORY AND DETAILED RISK APPRAISALS 11

5. GENERIC CONTROLS AND RECOVERY MEASURES 48

6. CONTROL STATEMENTS FOR LOW RAM HAZARDS 46

APPENDIX 1: DEFINITIONS 47

APPENDIX 2: RISK ASSESSMENT MATRIX 49

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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 Scope

Introduction

The associated gas produced in bulk separators of MMPS (H2S level ~ 690 ppmv) is compressed and sent as export gas (through export compressors, K-2407/08) to Marmul Power Station and other consumers in MMA, WTP, Qaharir and Thulelat Stations. The high H2S flash gas (H2S level ~ 9,000 ppmv) from the MMPS tanks is currently flared via Gas Recovery Compressor (GRC), K-2412 to avoid contaminating the MMPS gas system with high H2S gas. This gas con-tains high levels of H2S as a result of Birba oil being fed to the MMPS FWKO tanks. This high H2S gas is being flared. The Marmul Power Station is nearing the end of design life and planned for retirement from Dec 2022 on-wards. Post the retirement of MML power plant, there will be no evacuation route available for the MMPS export gas. In order to address the above issues, PDO performed conceptual study and proposed that the associated gas will be mixed with high H2S flash gas recovered from various tanks. The mixed gas will be compressed, dehydrated and dew pointed and will be sent through sour gas pipeline to Birba Gathering Station for further export to Al-Noor or for gas injection at Birba. At Birba Gathering Station (BGS), the gas was proposed to be exported to Al Noor Station along with other

sour gas from BGS as part of the Birba Rationalization Project through an export compressor (at BGS) and

export pipeline from BGS to Al Noor Station.

The new proposed concept is depicted in the below figures 1 and 2.

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Figure 1.

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Figure 2

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Scope of Work

The high level project scope for the new concept export to SOGL is briefly summarized as follows: Refer to Note 1 below for further details. Thiopaq Unit for the Gas Sweetening. Capacity: 300,000 sm3/day. H2S In/Out: 4000 ppm / 5 ppm

Two Booster Compressors, capacity of 150,000 sm3/day (2x100%) to increase the gas export pressure from 400 kPa (g) to 6500 kPa (g).

One Gas Dehydration Unit (TEG Injection) and HC Dew pointing Unit to achieve water content of 50 mg/Sm3 and Cricondentherm 12 °C (keeping margin of 5 °C on SOGL requirement of 17 °C).

One Refrigeration Unit to supply direct Refrigerant R-134a to HC Dew pointing unit.

Tie-in at SOGL Pipeline at MMPS.

New HP and AP flare systems and closed drain system for new proposed facilities. Adequate margin shall be considered to include the load from the surface facilities of MML AK HW Polymer Phase-3 project.

Closed drain system for new proposed facilities.

New Condensate flash vessels to collect the continuous condensate rich streams and water rich streams from new facility.

Condensate heater to heat up the cold condensate from condensate flash drum.

Instrument Air Package having capacity of 391 Nm³/h (Hold 7) each (IA Compressors and Driers: 1W+1S) to supply the Instrument Air to new facilities.

New Instrument air header shall be connected to the existing Instrument Air header.

Nitrogen Generation Package. New Nitrogen header shall be connected to the existing Nitrogen header.

Replacement of existing GRC (K-2412) with new Gas Recovery System, capcity:140,000 sm3/d. Refer to Note-2 below for further details.

Process and Utility Tie-in activity at existing MMPS facility to connect the piping from new facilities.

Demolition of existing booster compressor K-2407 / 08 including their associated facility.

Demolition of existing HP flare A-2433, LP flare A-2408, Maintenance flare A-2409, MCD-2 flare F-2412 and their associated facility. Note – 1: Refer the Project Design Basis document, DOCUMENT NO. : MAR-24-102961-AA-7704-00004-0000-JW

prepared during the FEED of the project with the earlier option (Exporting to Birba) for further details on the

Project Scope.

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2. HRA Team Responsible for HRA: Petrizzo, Jose MCOH1 Input Provided By: Attending List Attached.

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3. Remedial Actions

Priority Work Area Hazard, RAM Rating and Scenario Recommended Remedial Action

1

MMPS Gas Compression and Evacuation FACILITY

PROJECT

Psychological Hazards and Stress High

Isolation from family and friends when on rotational duty, working on dead-lines, pressure owning to the nature of the work environment.

1. Written procedure/safe work practice: Confirm that PDO expectations for shift rotations and employee welfare are included in Agreements.

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: September 2018 2. Administrative controls: Confirm a fatigue risk management

program is available for implementation covering HSE critical jobs.

Resp: Kidile, Shekhar OSEM21+MCOH Date: September

2016 ACTION CLOSED

1 Heat Stress / Hot Temperature Differentials Medium

Exposure to heat when working outdoors, typical ranges are from 38-46 degrees Celsius.

1. Provide rule-set for working under SCBA/BA in highh temperatures (work rest regimen).

Resp: MCOH1 Date: October 2015 ACTION CLOSED

2. Define critical activities and conduct risk assessment for

use of BA sets.

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: During Commissioning Phase

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1

MMPS GAS COMPRESSION AND

EVACUATION FACILITY PROJECT

General

1. Site verification is required to finalize the effectiveness of controls, recovery measures and final exposure ratings mentioned in this HRA.

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: During Commissioning Phase 2. Install Eye wash units self contained type in Battery

Room Resp: Kidile, Shekhar OSEM21 Date: march 2016 ACTION CLOSED 3. Select safety showers/eye wash stations according to

PDO GU-817 Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: September 2018 4. Training Matrix to include the requirement of FA&AED

training to 10% of operation and maintenance staff. Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: During Commissioning Phase

2 Hydrogen sulfide containing streams with H2S

> 1000 ppm mole (600 mg/kg) or >100 ppm

vapour space (7783-06-4)

Sulfur dioxide (SO2) RAM: Medium

1. Perform HAZOP and dispersion model to identify potential high H2S and SO2 for identification, classification and exclusion zones.

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: September 2018

2 Glycols: ethylene/diethylene/

triethylene/hexylene/

monopropylene/dipropylene glycol

RAM: Medium

1. Provide appropriate storage area for Glycol drums. Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: September 2018

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2

MMPS GAS COMPRESSION AND

EVACUATION FACILITY PROJECT

Noise

RAM: Medium

1. Ask vendor for SPL output new compressors/pumps characteristic and provide a predictive noise modeling during DEFINE Phase for new compressors/pumps.

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: December 2018

2 Legionella bacteria (waterborne)

RAM: Medium

1. Process design/equipment standards: Confirm that the design of potential water sources prevents aerosols, dead legs and stagnant water.


2 Natural Gas Condensate

RAM: Medium

Mercury (7439-97-6)

RAM: Medium

Refrigerants

RAM: Low

1. ERP to be developed /updated to ensure that personnel are aware of the emergency response procedures.


1 Sulphur

RAM: Low

1. Include a trolley in the scope for transporting the Sulphur from the Thiopaq to its final destination.

NOTE: MSE2 to be involved in finding the final destination for the Sulphur. Suggestion is to use option 3 adjacent to the Flares in MMPS or the reed

beds.. Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: March 2018

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2 Ergonomics: HFE Items

RAM: Medium

1. Implement all HFE DEPs standards required by DCAF and follow all remedial actions stated in Human Factors Engineering Screening report issued in December 2014 and August 2017 with the updated HSE Plan.

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: December 2018 NOTE: ACTION CLOSED FOR CONTROL ROOM

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

RAM: Low

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

Resp: Kidile, Shekhar OSEM21 and or CPD Team Date: December 2018

3 Histoplasma Capsulatum (contact with bird

droppings)

RAM: Low

1. Study feasibility to Install a roof net or alarm/sirens to avoid pigeon rest and nesting.

Resp: Kidile, Shekhar OSEM21 Date: March 2016 ACTION CLOSED

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4. Health Hazard Inventory and Detailed Risk Appraisals

Work Area MMPS GAS COMPRESSION AND EVACUATION FACILITY PROJECT

Hazard Food and water borne pathogens

RAM: Medium

Acute Potential Health Effects

Food poisoning; hepatitis A, amoebic dysentery, giardiasis, typhoid, cholera RAM: 3D

Chronic Potential Health Effects

Carrier of disease without having symptoms RAM:

Scenario Food and/or drinking water is handled and provided to staff.

Route & Form of Exposure

Ingestion Solid and liquids

Frequency & Duration of Exposure

Exposure Limit

Exposure Rating & Justification

ALARP Status Yes

ALARP Justification Controls in place

Controls Effectiveness

Written procedure/safe work practice - Food safety management system (FSMS) aligned with HACCP is implemented.

Audits and Inspections - FSMS is audited internally and SME's conduct external audits. Process design/equipment standards - Food handling facilities are planned, designed and constructed meeting local and international best practices.

Vector control measures - Effective pest control and sanitation programs in place.

Recovery Measures Effectiveness

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

Remedial Actions Priority

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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: 4C


None known RAM:

Scenario The potential for rodents, foxes, snakes etc gaining access to camp or office areas from the surrounding environment exists.


Dermal


Exposure Limit


ALARP Status Yes

ALARP Justification Controls on place


Training and information on hazard - Contractor personnel have been informed to immediately report any sightings of animals, reptiles or rodents to the HSE focal point. All staff is made aware of requirement not to feed wild animals and to properly store and dispose of any food items.




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Hazard Insects, Spiders, Scorpions, Bees

RAM: Medium


Irritation, inflammation, poisoning, anaphylactic shock RAM: 3C


Allergic reaction, secondary infection, RAM: 3C

Scenario Potential exposure to bites of insects, spiders, scorpions and bees exits due to location of work activities.


Dermal


Exposure Limit


ALARP Status Yes



Training and information on hazard - Staff are advised to check empty boots before wear and to be careful when moving objects i.e. small rocks.




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Hazard Legionella bacteria (waterborne)

RAM: Medium


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


Effects on lung function RAM: 3B

Scenario Domestic water systems, safety showers and eye wash stations are potential source of exposure.


Inhalation Liquid


Exposure Limit


ALARP Status YES


Controls: Procedures in place to be applied during operations. Effectiveness

Local Control - A focal point has been appointed to implement a Legionella management procedure for site potable water sources. A schedule for cleaning and disinfection of shower heads and water fountains are implemented and maintained.

Process design/equipment standards - Low flow filters and or flow control devices are fitted to all water flow lines to prevent operational conditions for Legionella growth.

Preventive maintenance - A regular preventative maintenance and inspection program on equipment that may harbour Legionella is implemented and includes all activities with regard to water systems, such as inspection, periodic flushing, cleaning, maintenance and application of biocides. Eye wash stations and safety showers are flushed weekly during routine inspections. Records of all activities are available on maintenance schedule.




1. Process design/equipment standards: Confirm that the design of potential water sources prevents aerosols, dead legs and stagnant water.

2

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Hazard HIV virus

RAM: Medium


HIV Positive RAM: 4B


HIV infection; AIDS; secondary infections. RAM: 4B

Scenario Staff has potential exposure risk only when exposed to body fluids of HIV/Aids infected person(s).


Dermal


Exposure Limit


ALARP Status Yes

ALARP Justification Controls in place.


Training and information on hazard - Annual HIV/Aids awareness campaign coincides with World Aids Day activities.




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Hazard Hepatitis Virus B, C and unspecified hepatitis virus

RAM: Medium


Hepatitis B / C infection, flu-like symptoms RAM: 4B


Liver failure, jaundice, weakness, liver cancer RAM: 4B

Scenario Potential exposure to risk only when exposed to body fluids of infected person(s).


Blood borne


Exposure Limit


ALARP Status Yes



Training and information on hazard - Focused risk awareness incorporated during World Aids (1st Dec) & Hepatitis day (28 July).




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Hazard MERS RAM: Medium


Severe acute respiratory illness. Fever, cough, and shortness of breath. About 30% of people confirmed to have MERS-CoV infection have died. RAM: 5A


None known

Scenario Route & Form of Exposure


Exposure Limit


ALARP Status Yes ALARP Justification Controls in place Controls Effectiveness

Training and information on hazard and task - adequate information and training on possible health effects of exposure to chemicals and how to handle them safely

Safety Manual, Written protocols




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Hazard Virus of colds, influenza, and Norovirus

RAM: Medium


Headache, nausea and vomiting, malaise, GI and respiratory effects. RAM: 3C


Scenario During indoors activities Route & Form of Exposure


Exposure Limit


.


Preventive maintenance - Preventive equipment maintenance to minimize level of AC contamination.

Training and information on hazard - Adequate hazard information and training provided to all.




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Hazard Histoplasma Capsulatum (contact with bird droppings)

RAM: Low


Histoplasmosis, primary risk is to persons with impaired immune systems RAM: 3B


Not Known

Scenario During routine presence in the plant


Inhalation Solid


Exposure Limit


ALARP Status YES ALARP Justification Controls improved Controls Effectiveness

Ensure Process design/equipment to standards. Written procedure/safe work practice –A maintenance program should be in place. Recovery Measures Effectiveness


Remedial Actions Priority 1. Study feasibility to Install a roof net or alarm/sirens to avoid pigeon rest and nesting.

3 ACTION CLOSED

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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 Isolation from family and friends when on rotational duty, working on dead-lines, pressure owning to the nature of the work environment.



Exposure Limit


ALARP Status No

ALARP Justification Site verification of controls required


Stress - generic organisational controls - Clear organisational structure and reporting lines; job descriptions, competence framework and work plans linked to roles and responsibilities.

Stress - generic personal controls - Time management, appraisal and performance management, physical exercises etc

Local Control - Shell Health resilience program or equivalent implemented for project team.


Stress - generic recovery measures - Psychological counseling available on referral by physician.


1. Written procedure/safe work practice: Confirm that PDO expectations for shift rotations and employee welfare are included in Agreements. 2. Administrative controls: Confirm a fatigue risk management program is available for implementation covering HSE critical jobs.

1 Action closed

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Hazard Heat Stress / Hot Temperature Differentials

RAM: Medium


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


Dermatitis RAM: 2C

Scenario Exposure to heat when working outdoors, typical ranges are from 32-40 degrees Celsius.



Exposure Limit


ALARP Status NO

ALARP Justification Site verification of controls and recovery measures required


Administrative controls, such as area restrictions and limited schedules - Scheduling of work to avoid peak heat times especially during the month of Ramadan (i.e. start work early in the morning and finish earlier). Chilled drinking fluids should be provided, with volume of consumption guidance. Shaded rest areas shall be positioned strategically.

Written procedure/safe work practice - Heat illness prevention procedure is implemented and specifies a work rest regime, approved by Occupational Health.

Local Control - Sheltered/shaded areas available. Fans or air blowers provided where feasible to provide air movement.

PPE-Skin protection: gloves, clothing - Clothing (coveralls, hard hat, hi-viz vest etc) chosen for coolness and sweat removal.

Training and information on hazard - Site induction includes heat stress awareness to all workers, rotators, visitors and the importance of acclimatization underscored.

Local Control - A weather station is located in the Control Room. Temperature readings should be recorded every two hours and communicated to site staff via radio or other mean of communication. Outdoor work is stopped when ambient air temperatures reach 50 degrees Celsius. The conditions under which work can continue for work that cannot be stopped is outlined in the project heat illness prevention procedure.




1. Provide rule-set for working under SCBA/BA in high temperatures (work rest

regimen).

2. Define critical activities and conduct risk assessment for use of BA sets.

1 ACTION CLOSED

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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", "snow blindness")

RAM: 2C


IARC 1 - Human carcinogen (skin cancer). Skin aging. May cause pterygium,

cataracts and macular degeneration

RAM: 4B

Scenario Direct sun exposure in outdoor work environment.



Exposure Limit


ALARP Status Yes

ALARP Justification Controls in Place


Shelter space designed within the site. Training and information on hazard - UV prevention training provided to all staff (toolbox talks, HSSE meetings, posters etc)




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Hazard Visible light (VL) (too much; too little) - wavelength 400 - 780 nm (non-ionizing radiation) RAM: Low


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


High levels of exposure to blue or visible light may cause ocular damage, especially later in life, and may be related to the development of age-related macular degeneration. RAM: 2A



Exposure Limit


ALARP Status No ALARP Justification Site verification of controls required Controls Effectiveness





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

3

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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 Exposure to plant noise and equipment.



Exposure Limit


ALARP Status No

ALARP Justification Verification of controls required


Training and information on hazard - should consider noise induced hearing loss prevention training.

Written procedure/safe work practice - Prevention of noise induced hearing loss should be managed in accordance with the company hearing conservation plan approved by PDO Head Occupational Health.

Process design/equipment standards - noise limits were included in the weighted selection criteria for high noise producing equipment i.e. 85dBA.




1. Ask vendor for SPL output new compressors/pumps characteristic and provide a predictive noise modeling during DEFINE Phase for new compressors/pumps.

2

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Hazard Hand/Arm Vibration

RAM: Medium


Muscular discomfort, fatigue and tingling in the hand or arms RAM: 1D


Muscular-skeletal disorders, vibration white finger RAM: 3D

Scenario While handling clutch. Route & Form of Exposure

Energy interaction


Exposure Limit



Administrative controls, such as area restrictions and limited schedules - Periodic break part of job routine.

Training and information on hazard - Adequate hazard information and training should be considered.

Ensure a preventive maintenance - Preventive equipment maintenance to minimize level of vibration being carried out.


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

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Hazard Whole Body Vibration

RAM: Medium


Muscular discomfort or fatigue, or tingling or numbness in the body RAM: 1D


Lower back pain or lower lumbar disorders RAM: 3D

Scenario While driving cranes/forklifts etc. Route & Form of Exposure

Energy interaction


Exposure Limit



Administrative controls, such as area restrictions and limited schedules – should be considered.

Training and information on hazard - Adequate hazard information and training should be provided.

Ensure preventive maintenance - Preventive equipment maintenance to minimize level of vibration being carried out.


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

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Hazard NORM

RAM: Medium


Cell damage e.g. skin burns, sickness, loss of hair - potentially fatal RAM: 3B


Human carcinogen (IARC 1), Damage to reproductive system and blood cells. RAM: 4B

Scenario During maintenance operations to wells Route & Form of Exposure

Dermal Contact, inhalation Solid, gas


Exposure Limit



Hazard identification by signs/warnings/labels - Radioactive source containers always carry standard 'Radiation Hazard Warning' label.

Training and information on hazard - Operators have appropriate level of hazard information and training.

Training on task/skill - operators are skilled and certified as competent on their jobs. Monitoring: Personal Measurements - Operators have instruments to ensure exposures are not above threshold limit values.

Written procedure/safe work practice - There is written procedure in the form of 'Procedure for Handling Radioactive Source' to guide safe tasks performance.




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Hazard Simple Asphyxiants- Nitrogen, Inert Gases, Oxygen Depletion, and Gas

Releases

RAM: Medium


Chemical asphyxiant RAM: 4C


Scenario During analysis task Route & Form of Exposure

Inhalation Gas


Exposure Limit





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


Medical Facilities in place, Firs Aid, Medical Emergency Response Plan, Safety Showers and eye washer


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Hazard Motor Oils, Used

RAM: Medium


Irritant to eyes and respiratory tract if mist is inhaled RAM: 2B


Contact dermatitis, skin carcinomas based on potential presence of PCAH RAM: 4B

Scenario During change-out of used oil. Route & Form of Exposure

Splash, Dermal, Inhalation Liquid


Exposure Limit


ALARP Status Yes ALARP Justification Controls in place. Controls Effectiveness

Local Control - No process in place to ensure change of gloves within their break-through times.

Hazard identification by signs/warnings/labels - Waste oils labeled. Training and information on hazard - Adequate hazard information and training on toxicology and preventive measures put in place provided.


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


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Work Area/Job MMPS GAS COMPRESSION AND EVACUATION FACILITY PROJECT

Hazard Combustion particulates/toxic smoke

RAM: Medium


Irritation of eyes and respiratory tract. RAM: 2C


Probably carcinogenic to humans (IARC 2A) RAM: 4B

Scenario Exposure during outdoor working. Route & Form of Exposure

Inhalation, contact Particle


Exposure Limit


ALARP Status Yes ALARP Justification Open space, natural ventilation, flare designed far from location Controls Effectiveness

Ensure engineering controls: DEP in place

Local control – natural open spaces




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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


Exposure Limit







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Hazard Glycols: ethylene/diethylene/ triethylene/hexylene/

monopropylene/dipropylene glycol

RAM: Medium


Severely irritant to eyes, mildly irritant to skin, moderately irritant to lungs. May affect CNS, liver and kidneys RAM: 3C


Damage to kidneys RAM: 3C

Scenario During additivation in production activities Route & Form of Exposure

Inhalation, Dermal Liquid


Exposure Limit


ALARP Status No ALARP Justification Controls need improvements. Controls Effectiveness



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



Remedial Actions Priority 1. Provide appropriate storage area for Glycol drums. 2

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Hazard Refrigerants RAM: Low


Irritant to eyes and upper respiratory tract RAM: 2B


Effects on lung function RAM: 3A

Scenario During emergencies involving ignition/fire (forms Phosgen/halogens if ignited)


Inhalation Gas


Exposure Limit







Remedial Actions Priority 1. ERP to be developed /updated to ensure that personnel are aware of the

emergency response procedures. 2. Select safety showers/eye wash stations according PDO GU-817

2

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Hazard Sulphur RAM: Low


Irritant to eyes and skin, can inflame the respiratory tract. May off gas H2S and SO2. RAM: 2C


Dermatitis and chronic bronchitis. RAM: 3B

Scenario During handling and loading biosulphur from Thiopaq system


Inhalation, Dermal Solid


Exposure Limit





PPE Recovery Measures Effectiveness


Remedial Actions Priority 1. Include a trolley in the scope for transporting the Sulphur from the Thiopaq to its

final destination. NOTE: MSE2 to be involved in finding the final destination for the Sulphur. Suggestion is to use option

3 adjacent to the Flares in MMPS or the reed beds.

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Hazard Oxygen concentration in air (in balance) RAM: Medium


Asphyxiation due to displacement of oxygen, addressed in safety case RAM: 4C


None known



Exposure Limit



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 accord-ance with SP1284, SP1166 and DEP 30 00 60 21.






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Hazard Carbon monoxide (Gas) RAM: Medium


Inhalation: VERY TOXIC. Can harm the blood (decreased ability to carry oxygen carboxy - haemoglobinemia) and cardiac disorders . . Symptoms may include headache, nausea, dizziness, drowsiness and confusion. May cause permanent damage to organs including the brain and heart. Can be fatal Skin Contact: Not irritating. Direct contact with the liquefied gas can chill or freeze the skin (frostbite). RAM: 4C


EU Risk Category 1 - Teratogen: may cause harm to unborn child. RAM: 4B



Exposure Limit









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Hazard Sulfur dioxide (SO2) RAM: Medium


Corrosive to eyes and lungs. Inhalation can produce asthma-like reactions, reflex spasm of the larynx and respiratory arrest to fatality RAM: 4C


Respiratory sensitizer, Asthma. Suspected reprotoxic substance. RAM: 3C



Exposure Limit


ALARP Status YES ALARP Justification controls verified Controls Effectiveness

Apply process design/equipment standards - Good engineering design practice in accord-ance with CP117, GU611, SP1127, SP1190. The design of sampling equipment and sampling points to minimize personal exposure risks.

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





Remedial Actions Priority 1. Perform HAZOP and dispersion model to identify potential high H2S and SO2 for identification, classification and exclusion zones.

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Hazard Hydrogen sulfide containing streams with H2S > 1000 ppm mole (600

mg/kg) or >100 ppm vapour space (7783-06-4)

RAM: Medium


Chemical asphyxiant causing respiratory paralysis, irritant; unconsciousness, fatality RAM: 4C


Damage to nasal tissues. RAM: 2B

Scenario The scale of a toxic impact from high pressure, high-% H2S leaks is very significant.


Inhalation Gas


Exposure Limit


ALARP Status YES ALARP Justification controls verified Controls Effectiveness

Containment / Isolation - Use of double mechanical seals on pumps. Double seals for use of natural gas and nitrogen for compressors. Minimize leak sources through leak path reduction.

Process design/equipment standards - Flares provided with air through blowers to complete combustion process and included in design. Flare stack height designed to have acceptable level of ground level concentration in case of flaring. No atmosphere relief valve to atmosphere in sour surface. Instrument vents in sour service are to the HP flare.

Local Control - Instrument vents in sour service are to the HP flare. Closed system - Specially designed sampling points to facilitate close system sampling. Written procedure/safe work practice - Confined space entry procedures in place (PR-1148) Activity takes place under PTW procedure.

PPE-Other - Rule-set for working under SCBA/BA in high temperatures are approved and implemented.

Training and information on hazard - H2S training schedule in place for all staff and visitors. Schedule includes H2S awareness and escape and H2S awareness and escape for sour sites, both with a validity period of 2 years.

Local Control - Leak sources are minimized through leak path reduction. Gas / vapour detection: fixed point - H2S detectors and warning system strategically positioned throughout facility for early gas detection leaks (TLV 5ppm).




1. Perform HAZOP and dispersion model to identify potential high H2S and SO2 for identification, classification and exclusion zones.

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Hazard Natural Gas Condensate RAM: Medium


Irritation of the eyes and respiratory tract, CNS depression RAM: 2C


Human carcinogen (IARC 1), damage to bone marrow and immune system, dermatitis. RAM: 4B

Scenario During field operations sampling Route & Form of Exposure

Inhalation, contact dermal Vapor


Exposure Limit



Training and information on hazard and task - adequate information and training on possible health effects of exposure to chemicals and how to handle them safely should be considered.






Remedial Actions Priority 1. ERP to be developed /updated to ensure that personnel are aware of the

emergency response procedures. 2. Select safety showers/eye wash stations according to PDO GU-817

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Hazard Mercury (7439-97-6)

RAM: Medium


Acute poisoning, neurological effects RAM: 3B


Effects on kidneys and central nervous system, emotional and psychological disturbances, effects on reproduction. RAM: 3C

Scenario Breakage of mercury containing equipment and subsequent cleanup. Thermometers and Brookfield meter. Digestion Solution for COD contains mercury - samples are heated to 140C.


Inhalation and Contact Liquid


Exposure Limit


ALARP Status No



Apply Mercury Disposal in accordance to SP-2087 & PR-1515.


Spill clean-up kit - Mercury spill kit present in lab.



1. ERP to be developed /updated to ensure that personnel are aware of the emergency response procedures.

2. Select safety showers/eye wash stations according to PDO Gu-817

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Hazard Man made or synthetic vitreous fibers

RAM: Medium


Irritant to skin and respiratory tract RAM: 2B


IARC 2B - Possible human carcinogen. Chronic persistent inflammation and fibrosis. RAM: 4B

Scenario Used for equipment’s insulation-isolation


Inhalation


Exposure Limit


ALARP Status Yes





Hazard identification by signs/warnings/labels –according to standards. Recovery Measures Effectiveness



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Hazard Manual Handling - Lifting, Lowering, Pushing, Pulling,

Hand/Wrist/Grasping/Pinching/Holding/Repetitive Use

RAM: Medium


Acute strain or sprain to muscles and joints RAM: 3C


Chronic musculo-skeletal disorders RAM: 3D

Scenario Movement of equipment and materials.



Exposure Limit


ALARP Status No



Process design/equipment standards - Design include HFE DEP 30 00 60 10.

Training and information on hazard - Correct lifting procedures are communicated to staff. Ensure the availability of mechanical lifting devices if required.




1. Implement all HFE DEPs standards required by DCAF and follow all remedial actions stated in Human Factors Engineering Screening report issued in December 2014+August 2017 and the updated HSE Plan.

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Hazard RSI Risk from Computer/Display Screen Equipment

RAM: Medium


Muscular discomfort; eyestrain; soreness to soft tissues (e.g. wrist) RAM: 1D


Work-related upper limb disorders, repetitive strain injury RAM: 3D

Scenario Use of personal computer and mouse during preparation of menus, placement of orders and normal administrative duties.



Exposure Limit


ALARP Status No

ALARP Justification Site verification of controls and recovery measures required


Ergonomic workplace assessment - HFE screening for project and control room to be im-plemented by HFE professional and results of analysis implemented for FEED.

Administrative controls, such as area restrictions and limited schedules - Rotation sched-ule should be considered.

Ensure the availability of ergonomic accessories & software - Laptop accessories. Training and information on hazard - Awareness training (explaining what RSI is and how it can be prevented).




1. Implement all HFE DEPs standards required by DCAF and follow all remedial actions stated in Human Factors Engineering Screening report issued in December 2014 and the updated HSE Plan.

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Hazard Awkward Posture - Unavoidable, sustained, long-term awkward posture of

the shoulder, neck and back

RAM: Medium


Muscular discomfort or fatigue, strain or sprain RAM: 3C


Chronic musculo-skeletal disorders of the shoulder neck or back RAM: 3D

Scenario Exposure when holding neck in an awkward position and bending at the waste when using personal computers.



Exposure Limit


ALARP Status No



Administrative controls, such as area restrictions and limited schedules - Adequate work-rest cycles should be considered to reduce frequency and duration.

Process design/equipment standards - Design include HFE DEP 30 00 60 10. And Ac-cess to valves and sampling points included during HFE screening

Training and information on hazard - Behavioral safety techniques, as applicable is communicated by HSE Department to all admin staff.


Medical Facilities in place, Firs Aiders, Medical Emergency Response Plan



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

and high walking displacement

RAM: Medium


Muscular fatigue or discomfort, may include numbness in the legs RAM: 1C


Lower body joint disorders RAM: 3D

Scenario During equipment maintenance and parts change out. Route & Form of Exposure


Exposure Limit



Training and information on hazard - Adequate hazard information and training on prevention of RSI shall communicate to all users.


Medical Facilities in place, Firs Aiders, Medical Emergency Response Plan Remedial Actions Priority


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5. Generic Controls and Recovery Measures



Local Control - Spill absorbent materials are available and easily assessable throughout plant.

Written procedure/safe work practice - Site induction training procedure is in place which is mandatory for all workers attend prior to commencing work. Life critical activities have been identified and is communicated to all staff through awareness campaigns, posters etc

Written procedure/safe work practice - Alcohol and drugs policy is implemented.

Local Control - A Permit to Work (PTW) system is in place.

Local Control - Windsocks are erected and visible from all critical control points. Wind socks are used to determine wind direction to ensure that staff is evacuated down-wind in the event of an emergency or to ensure that work is performed down-wind from any potential hazardous chemical to reduce inhalation risk.

Written procedure/safe work practice - Chemical compatibility matrix developed.

Written procedure/safe work practice - PDO standard will be followed during procurement of PPE (gloves, coveralls, face shield, goggles).

Hazard identification by signs/warnings/labels - The SDS sheets for all chemicals are available with UIK1 – production chemistry and can be provided as requested. The SDS sheets contain all information regarding the chemical including: Chemical product and company identification Composition/ information on ingredients Hazards identification First aid measures Fire fighting measures Accidental release measures Handling and storage Exposure controls/ personal protection Physical and chemical properties Stability and reactivity Toxicological information Ecological information Disposal considerations Transport information Regulatory information Other information

Hazard identification by signs/warnings/labels - SHOC cards for all chemicals are provided in PDO Chemical Requirements Report

Written procedure/safe work practice - PDO Chemical Requirements Report provides personal protective equipment (PPE) requirements when handling chemicals under normal unconfined conditions.

Process design/equipment standards - Sampling points will be located at ground level.. The location of sampling points and types is specified in the project.

Written procedure/safe work practice - waste management is managed in accordance with PDO standards.


First aid and Medical emergency response - Medical Emergency Response Plan with tiered response and a Health Hazards Monitoring Plan available and approved by PDO Head of Occupational Health.

Emergency response procedures - PDO Chemical Requirements provides personal precautions and methods for cleanup of hazardous chemical substances in case of accidental release.


See section 3 3

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6. Control statements for Low RAM Hazards

Work Area Hazard CONTROLS NEED IMPROVEMENT? MORE DETAILED ASSESSMENT?

MMPS GAS COMPRESSION AND EVACUATION FACILITY PROJECT

Sexually Transmitted Diseases (other than HIV)

No

Biomass-Bacteria No

Histoplasma Capsulatum Yes

Work Environment - Indoor climate

No

Work Environment – Nuisance noise such as from open plan office.

No

Fungus/mold growth, or bioaerosols

No

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

Yes

Infrared (IR) – wavelength 780 1 mm (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

Solvents / Degreasers No

Particulates (total, not classified)

No

Hydrocarbon Gas (EP), Hydrocarbons Light (<C5's),

No

Detergents No

Hydrocarbons, VOC (total vapor)

No

Lubricating Oils, C16-C35 Hydrocarbons (includes oil mist and glycerin) and Greases (< 3%PCAH Content). Includes oil mist and glycerin

No

Dielectric Oils/ Fluids No

Refrigerants Yes

Sulphur Yes

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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 behavioral. 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.

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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 behavioral 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

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