MSMWHS217 Gas Test Atmosphere...Purging 1. Outline the reason and process for Purging a space. 2. Highlight the requirement for gas used to have no more than 21% O2 3. Outline the

Emergency Management Services

MSMWHS217

Gas Test Atmosphere

Training and Assessment Strategy

TAS

TAS - Gas Test Atmosphere VC 5.0.docx 2

TABLEOFCONTENTS

OVERVIEW 3INTRODUCTION 3TRAINERCOMPETENCIES 3TRAININGFACILITY 3TOOLSANDRESOURCES 3COURSEOVERVIEW 4LESSONPLAN 61. LEGAL 62. DEFINITIONS 63. IDENTIFYINGHAZARDS 64. IDENTIFYATMOSPHERICHAZARDS 75. EXPOSURESTANDARDS 76. CONTROLMEASURESFORATMOSPHERICHAZARDS 77. COMMONGASSESANDTHEIRPROPERTIES 88. GASDETECTORSANDEQUIPMENT. 99. CHALLENGETESTINGANDCALIBRATION 910. FAULTS,SERVICEANDMAINTENANCE 1011. OPERATION 1012. TESTINGANATMOSPHERE 1113. ATMOSPHERICMONITORING 11ANSWERSHEET 12

APPENDIX1-GasTestAtmosphereToolsAndResourcesList 15


Overview

Introduction The Training and Assessment Strategy (TAS) provides a guide as to how to deliver and assess against the Gas Test Atmosphere course. The Gas Test Atmosphere Course has been designed and packaged in consultation with industry and is delivered as one 4 hour course for up to 12 participants or can be combined with day one of the Confined Space Course where participant numbers are limited to a maximum of 6 participants. The Gas Test Atmosphere Course caters for logical building of skills and knowledge enabling the participant to identify, test and monitor a potentially unsafe atmosphere. The Gas Test Atmospheres course delivers the following units of competency: MSMWHS217 Gas Test Atmospheres

Trainer competencies To be eligible to train and assess the Gas Test Atmosphere course for Emergency Management Services the Trainer/Assessor must meet the following minimum requirements prior to conducting the course.

Qualifications • Certificate IV Training and Assessment (TAE40116) • Gas Test Atmosphere qualifications equivalent to the level being trained or above (minimum of

MSMWHS217 Gas Test Atmospheres). • EMS Gas Test Atmosphere Trainer accreditation (as per units of competency delivered). Vocational Experience • At least 3 years industry experience. • Competency in hazard identification and risk management. • Experience in atmospheric monitoring.

Training Facility The Gas Test Atmosphere courses may be delivered at any location that has safe and secure access to a classroom environment with projector screen/whiteboard, seated space for the nominated number of participants and relevant amenities (lunch room and toilet facilities).

Tools and Resources The detailed tools and resources that are required to deliver the Gas Test Atmospheres course are provided in Appendix 1. Each of the tools and resources are reviewed and formally validated on a regular basis, in accordance with the Standards for Registered Training Organisations. For further information, Trainers/Assessors may also refer to the following: • EMS Policy and Procedures Manual for detailed information regarding the rights and responsibilities of the

Trainer/Assessor. This includes travel, training, assessment and requirements to support participants in achieving competency from enrolment through to assessment.

• EMS Participant Handbook for detailed information regarding the rights and responsibilities of the participants, including access to support services for specific learn needs.

For more information please contact the EMS Training Manager on 1300 133 302.


MSMWHS217 Gas Test Atmosphere

Course Overview The Gas Test Atmospheres course focuses on the skills required for workers required to sample, monitor, test and identify a potentially unsafe atmosphere. The Gas Test Atmosphere course is delivered over a 4 hour face to face period and includes the following unit of competency:

MSMWHS217 Enter Gas Test Atmosphere Course Duration The duration of the Gas Test Atmospheres course is a minimum of 4 hours face to face. This duration may not be reduced but may be extended as required to meet vocational requirements. Maximum Number of Participants The maximum number of participants is limited to 12 persons. Where the course is being run in conjunction with the 1 Day CS-100 Confined Space Entry Course the maximum number of persons is limited to 6 to ensure that each participant has enough time to complete the additional practical assessments required. Entry Requirements Pre-Requisite There are no prerequisite knowledge requirements for the Gas Test Atmospheres course. Physical Fitness The Gas Test Atmosphere course is very practical however it does not require a high degree of fitness. Persons who can comfortably walk up a flight of stars should have no difficulty in completing the course. Standard of Dress Suitable work clothing is required when conducting practical activities. A minimum of a long sleeved shirt with long pants and sturdy footwear. Thongs, sandals, high heels, shorts, skirts and dresses are not permitted during practical activities. Topics included Atmospheric Hazards and Controls Common Gasses and their Properties Gas Detector Types and Operation Challenge Testing Calibration Faults and Difficulties Service and Maintenance Testing and Atmosphere Monitoring and Atmosphere Respiratory Protection Practical Atmospheric Testing


Assessment Requirements To be awarded the MSMWHS217 Gas Test Atmospheres Unit of Competency participants will have to complete the following assessments. • 20 Question Multiple Choice Assessment. • 6 Written Answer Questions. • A Practical Equipment Identification Assessment Activity. • A Practical Gas Test Atmosphere Activity. The assessments will be conducted throughout the course in both a formative and summative manner.


Lesson Plan

Gas Test Atmospheres

1. Legal

Discuss the WHS Act and Regulations. Include Duties, Duty to Manage Risk and Category Offences. Explain how Atmospheric testing is covered in a number of publications and legislation such as:

• WHS Regulations • Codes of Practice • Australian Standards • Workplace Policies and Procedures

2. Definitions

Explain the meaning of the following terms in relation to atmospheric Testing and Monitoring:

• Breathing Zone • Substance • Dusts • Fumes • Gasses • Mists • Vapour • Smoke • Personal Monitoring • Static Monitoring • Hot Work

3. Identifying

Hazards

Methods Identifying Hazards

1. Discuss methods of identifying Hazards in the Workplace. 2. Provide an overview of the Pictograms identifying hazardous

substances. The Risk Management Process

1. Provide an overview of the Risk Management Process. Identify, Assess, Control, Review.

2. Discuss the importance of: a. Pre Start briefing b. SWMS / JSA’s / RA etc

Control Measures

1. Discuss the importance of implementing and monitoring Control Measures.

2. Outline the Hierarchy of Control 3. Discuss various hazards (not just atmospheric) and suitable control

measures for a range of workplace hazards.


Work Permit System

o Discuss the Work Permit Process and how this governs the activities conducted.

4. Identify Atmospheric Hazards

Atmospheric Hazards

1. Identify various atmospheric hazards found in the workplace Also discuss how they can occur include;

Unsafe Oxygen Levels.

a. Safe Occupation Exposure Level - 19.5% to 23.5% b. The effects of low oxygen < 19.5% c. The Effects of High O2 > 23.5%

Toxic Atmospheres

a. Include H2S, NH4, CO, CO2, O3,

Flammable Atmospheres a. 5% and 10% LEL exposure rule for Confined Spaces. b. 0% for Hot Work and other requirements.

5. Exposure Standards

Exposure Standards

• Explain the Occupational Exposure Standards and how these effect operational parameters.

Time Weighted Average

• Explain the TWA exposure limit, where this is located and how this affects workers. (8hr Day / 5 Days a Week)

• Discuss the limitations (1 Exposure per 24hr period)

• Explain how to calculate a TWA for persons working longer shifts.

Short Term Exposure Standard

• Explain the STEL exposure limit, where this is located and how this affects workers.

• Discuss the limitations (4 Exposure per 24 hrs / 1 hr Break in between exposures)

HCIS Database (Safe Work Australia)

1. Provide an overview of the HCIS database and how this can be accessed.

6. Control Measures for Atmospheric Hazards

Explain the procedures for controlling atmospheric hazards by: Ventilation

1. Outline the process of ventilation. Include


o Positive Pressure o Negative Pressure o Natural Ventilation o A combination of techniques

Purging

1. Outline the reason and process for Purging a space. 2. Highlight the requirement for gas used to have no more than 21% O2 3. Outline the various gasses used in Purging. (CO2, N, Ar)

Selection and Use of Appropriate PPE

1. Highlight how the correct PPE protects the worker from a hazardous atmosphere and poorly selected PPE may not.

2. Detail the following respiratory protection, its use and it’s limitations.

o P1, P2 and P3 Facemask o Canister Respirator o Supplied Air Respirator (Both SCABA and Air Trolleys)

P1 – retain about 80% of particles smaller than 2 micrometers P2 – retain about 94% of particles smaller than 0,5 micrometer P3 – retain about 99,95% of particles smaller than 0,5 micrometer

7. Common

Gasses and their Properties

Common Gasses found in Industry Provide an overview of the different gasses found in Industry.

Include:

• Individual Properties • Typical Uses • Hazards associated • Exposure Standards • Effects on the body

Include the following gasses.

o Oxygen o Nitrogen o Hydrogen Sulphide o Propane o Butane o Carbon Di Oxide o Carbon Monoxide o Nitrogen o Acetylene o Ammonia o Ozone o Methane o Argon


Gas Density

• Explain how densities effect the way gases behave and where they will be

located in a space. o Oxygen o Nitrogen o Hydrogen Sulphide o Propane o Butane o Carbon Di Oxide o Carbon Monoxide o Acetylene o Ammonia o Ozone o Methane o Argon

For each of the gasses above, discuss the various PPE required and control measures to make a contaminated space safe.

8. Gas Detectors

and Equipment.

Gas detectors.

• Provide an overview of the various types of Gas Detectors used in industry.

Selecting the Correct Gas Detector Type.

• Explain how the Gas Detector used needs to be the correct type based on the Risk Assessment.

Associated Equipment

• Provide an overview of the following equipment:

o Sampling Pumps o Test Tubes o O2 Meters o Combustible Gas Detectors o Other Gas Detectors o PPE

Units of measure

o Define the different units of measure used by the Gas Detector.

o PPM, %v/v, mg/cubic m, LEL, UEL, Alarms • Outline the different Alarms associated with the Gas Detectors.

o STEL o TWA o Peaks

9. Challenge Testing and Calibration

Clearing the Peak Readings

o Discuss the Peak readings and the importance of resetting these prior to conducting atmospheric testing.


Fresh Air Setup (FAS)

o Explain the process of conducting a FAS prior to testing an atmosphere. Challenge Testing

o Outline the process for Challenge Testing the gas detector prior to use o Discuss the importance of using the correct Calibration Gas.

Field Calibration

o Outline the process for Field Calibration of the gas detector. o Reaffirm the importance of using the correct Calibration Gas.

Problems that May Occur

o Discuss problems that may occur and the procedures to rectify these including:

o Detector fails Challenge Test o Detector fails Field Calibration o Blocked Sample Pump o Blocked Filters o Overdue Calibration o Low Battery

10. Faults, Service and Maintenance

Faults and Damaging Conditions Discuss the following Damaging Conditions that could result in accurate readings or damage the Gas Detector: o Poisoning of sensors o Contaminating of sensors o Physical damage o Exposure to excessive temperatures o Immersion in Water o Forcing Gas through at higher flow rates o Using in heavily concentrated environments o Silicone compounds, spray painting and Solvents o Blocked Sensor Aperture o Explosive risk exposing to raw O2, C2H2 or H

Service and Maintenance o Discuss the general servicing and maintenance of the Gas Detector. o Highlight the importance of not using Solvents of any type to remove

contaminates.

11. Operation

Operation of Gas Detectors

• Demonstrate the general operation of a standard 4 head Gas Detector including the following:

o Start Up o Self Test o FAS o Challenge / Bump Test o Field Calibration o Filter Change / Check o Pump Test o Clearing Peak Readings


12. Testing an

Atmosphere

Testing and Atmosphere • Discuss when to test an atmosphere • Outline the difference between Testing and Monitoring. • Outline the methods and considerations of testing an atmosphere including:

o The range of levels that need to be tested o Considerations for trapped gasses o Time delay in readings (Length of sampling hose / Pump capacity)

• Discuss the recording of results

• Explain the frequency of sampling and how this is based on the risk

assessment and activities being carried out in the space. Issues creating Inaccurate or Unreliable Results • Explain how LEL readings are affected in Oxygen Enriched and Oxygen

Deficient Atmospheres • Corrective factors with LEL readings • Explain how silicates can affect the detector heads and provide inaccurate

readings • Highlight that the detector only looks for certain gasses or conditions and

how even a slight reduction in Oxygen indicates the presence on a potentially unidentified gas which may or may not be harmful to the worker

13. Atmospheric Monitoring

• When to monitor an atmosphere. • Explain the two types of monitoring and when each of these would be

suitable. o Personal Monitoring o Static Monitoring

• How to wear a gas detector • Location of the Detector during Personal Monitoring. (Breathing Zone)


Answer Sheet Assessment Task 1

1 A B C D 5 A B C D 9 A B C D 13 A B C D 17 A B C D 2 A B C D 6 A B C D 10 A B C D 14 A B C D 18 A B C D 3 A B C D 7 A B C D 11 A B C D 15 A B C D 19 A B C D 4 A B C D 8 A B C D 12 A B C D 16 A B C D 20 A B C D

Question 21 List 3 Hazardous gasses that may be found in the Workplace: 1. The 3 answers must be a gas that is hazardous and can be found or could be found

in the Workplace. Question 22 Using the vapour density supplied, identify the following gasses as being lighter or heavier than air:

Hydrogen Sulphide (Vapour density 1.17) Is Heavier / Lighter than air.

Acetylene (Vapour density 0.9) Is Heavier / Lighter than air.

Propane (LPG) (Vapour density 1.5) Is Heavier / Lighter than air. Question 23 List 3 things that a worker could do that could contaminate an atmosphere. This could be a work process, introduced hazard or result of using equipment. 1. The 3 answers must be consistent with a work task, activity or something that

would contaminate the atmosphere. I.e. running a petrol pump in a confined space.


Question 24 A) What is the gas detector to the right telling us? The is a flammable atmosphere at 12% of its LEL. B) Is it safe to conduct Hot Work? No it is not safe to conduct Hot Work. Question 25 Identify the hazardous properties of each gas by joining them with a line:

Propane Highly Flammable / Explosive

Ammonia A simple asphyxiant (Non toxic)

Nitrogen Highly toxic in small quantities

Hydrogen Sulphide Irritant (causes watery eyes and difficulty breathing)

Assessment Task 2

Identify and Inspect Atmospheric Monitoring Equipment

The candidate correctly identifies the equipment listed below and can explain maintenance, fault finding and storage procedures. The candidate must also be able to rectify basic common faults with the equipment. This may be conducted throughout the course or as a stand during the practical assessment phase. Equipment ✔ Comments

Gas Detector

Assessor must record observations here

Correct Calibration Gas for the Gas Detector used

Sampling Pump and Hose

Gas Detector Filters

Battery / Charger


Assessment Task 3

Conduct Atmospheric Testing Overview The candidate is to prepare and test a range of atmospheres and record the results. The atmosphere will be contained in three 20 Ltr containers each with a varying gas composition based on the following: Container 1 This container is to contain a de oxygenated environment obtained by adding Nitrogen, Argon or CO2. Container 2 This container is to contain a normal sample of the atmosphere. Container 3 This container is to contain an elevated LEL not more than 50% obtained by adding Butane. The Assessor will create the three Atmospheres listed above. Each Candidate is to test all three containers and correctly identify the hazard in each container. The answers will be recorded on the Gas Test Results section of the assessment form. ** Note to Assessor Ensure that only slight changes are made to the atmosphere. Adding large amounts of gas to the drums may create an atmosphere that will damage the Detector. Element ✔ Comments Prepare for Gas Testing

o Identify need to test atmosphere. o Select appropriate Detector o Identify sampling pattern required o Identify PPE required to protect the candidate

Assessor must record observations here

Prepare Detector for Atmospheric Testing

o Check Detector for damage o Insert clean filters where required o Turn on detector o Ensure sufficient battery power o Confirm sensor types o Confirm alarm settings o Confirm calibration date o Conduct a Pump Test o Clear Peaks and conduct FAS o Challenge Test the Detector o Reset Peaks

Test Atmosphere

o Test atmosphere following the appropriate sampling pattern o Correctly Interpret readings o Identify the hazard indicated by the detector o Record test result o Identify suitable control measures including PPE and Ventilation

methods for the hazard indicated.

Clean, Service and Restore Equipment

o Clean and restore detector o Recharge as required o Store as required


Appendix 1 - Gas Test Atmosphere Tools and Resources List

The following tools and resources are required for delivery of the Gas Test Atmosphere Program.

Tools and Resources List

Stationery Manuals Gas Test Atmospheres Participant Manual 1 copy per participant Copy of the WHS Regulation 1 Extract from the HCIS Data Base 1 Forms Enrolment / Assessment Forms

1 set per participant Theory Assessment VET Feedback forms EMS Feedback forms Trainer/Assessor Presentation Equipment Computer / iPad and Projector with PPT Presentation Alternative: White Board / Butchers Paper with Dry Erase markers.

1

Training and Assessment Strategy 1 Training Facility Classroom style with White Board / Projection Screen Equipment Gas detector

1 for every 4 Participants Gas detector challenge gas Sample Pump 20 ltr Containers 3 Butane Lighter 1 Nitrogen or Argon or CO2 Cylinder with regulator 1

Documents

MSMWHS217 Gas Test Atmosphere...Purging 1. Outline the reason and process for Purging a space. 2. Highlight the requirement for gas used to have no more than 21% O2 3. Outline the