Scenario: You are contracted as a consultant occupational hygienist to complete an occupational hygiene assessment for SB Fabrications, based in Smithfield, Sydney. Company Overview: SB Fabrications fabricates

Part 1: Evaluation of Exposure Risk

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Scenario:
You are contracted as a consultant occupational hygienist to complete an occupational hygiene assessment for SB Fabrications, based in Smithfield, Sydney.

Company Overview:
SB Fabrications fabricates various metal components using:

• Lathes
• Milling machines
• Grinding machines
• Metal guillotines
• Metal forming/bending equipment
• Polishing machines

Work Areas:

1. Machinist’s Workshop
   • Equipment: Lathes and milling machines
   • Personnel: 7 machinists, 1 apprentice, 1 supervisor
2. Finishing Workshop
   • Equipment: Grinding and polishing machines
   • Personnel: 4 finishing workers, 1 supervisor/leading hand

Work Schedule:

• 8-hour shifts
• 5 days per week

Metalworking Fluid Composition:

• Semi-synthetic MWF containing:
  • Monoethanolamine (MEA, CAS 141-43-5)
  • Triethanolamine (TEA, CAS 102-71-6)

Reference Video:
How Metalworking Fluids are Used

Questions for Consideration

1. Major Health Hazards:
   • Anticipated health effects from exposure to MEA and TEA
   • Skin and respiratory irritation
   • Potential sensitization or dermatitis
2. Risk Assessment Approach:
   • Identification of hazards
   • Assessment of exposure
   • Evaluation of health risks
3. Occupational Hygiene Monitoring Requirements:
   • Determine if air monitoring is needed for ethanolamines
   • Consider particle/fume exposure from grinding/polishing
4. Monitoring Strategy:
   • Identify target worker groups
   • Determine sampling duration and frequency
   • Decide number of samples required

Task #1:

• Develop a sampling strategy:
  • Determine workplace exposures
  • Include worker groups, number of samples, and methodology
  • Research potential hazards and health effects

Part 2: Evaluation of Monitoring Results

Provided Data:

• Air monitoring data for MEA and TEA in the workplace
• Data available on Excel spreadsheet (via Moodle)

Task #2 Instructions

1. Review Sample Data:
   • Calculate concentrations
2. Statistical Analysis:
   • Use EN689 and IHStats
   • Summarize key parameters in a descriptive statistics table
   • Provide interpretation of results
3. Sampling Limitations:
   • Consider limitations of 2-day sampling strategy
4. Legislative Compliance:
   • Evaluate whether workplace exposures comply with legislation
5. Additional Hazards:
   • Identify any other chemical hazards requiring monitoring
6. Conclusions & Overexposure Evaluation:
   • Determine if controls are required
   • Compare with literature

Task #3 – Technical Report Writing

Requirements:
Prepare a professional AIOH-style technical report for the Health & Safety Manager. Include:

• Methodology
• Identification and Evaluation of Hazards
• Conclusions based on exposure data
• Statistical review of sampling data

Marking Criteria

Criteria Title/Cover page/Executive summary Process description (health effects & legislation) Methods & Measurements Evaluation of Results & Discussion Conclusion & Recommendations General presentation & readability (referencing according to UOW Harvard)

Generative AI Declaration

Select the relevant option for your submission:

I have not used any generative AI tools or technologies to prepare this assessment.

I acknowledge the use of generative AI tools or technologies to prepare this assessment.

• Include AI tool used
• Provide prompts and links
• Demonstrate how final submission is your own

Assessment Requirements

The HAS 962 – Measurement Assessment 4 requires students to complete a professional occupational hygiene technical report for SB Fabrications, a metal fabrication company based in Smithfield, Sydney. The assessment is divided into three parts:

Part 1 – Evaluation of Exposure Risk

• Identify the major health hazards associated with the use of metalworking fluids (MWFs) containing monoethanolamine (MEA) and triethanolamine (TEA).
• Describe a risk assessment approach, including hazard identification, exposure assessment, and evaluation of health risks.
• Determine occupational hygiene monitoring requirements: which worker groups to monitor, for what hazards, duration, and number of samples.
• Develop a sampling strategy with justification and methodology.

Part 2 – Evaluation of Monitoring Results

• Review and calculate concentrations from provided air monitoring data (Excel spreadsheet).
• Conduct statistical analysis using EN689 and IHStats.
• Summarize results in a descriptive statistics table with interpretation.
• Evaluate sampling limitations, legislative compliance, and identify other chemical hazards if applicable.
• Draw conclusions regarding potential overexposure and compare findings with literature.

Part 3 – Technical Report Writing

• Prepare an AIOH-style professional technical report for the Health & Safety Manager.
• Include methodology, hazard evaluation, exposure data interpretation, and statistical review.
• Maintain professional presentation, correct referencing (UOW Harvard), and executive summary.

Additional Requirement:

• Include a Generative AI declaration if AI tools were used.

Approach Taken by Academic Mentor

The academic mentor guided the student through a step-by-step process to ensure a structured, thorough approach:

1. Understanding the Scenario
   • The mentor helped the student review company details, workshops, equipment, and the composition of metalworking fluids.
   • Emphasis was placed on identifying potential health hazards from MEA and TEA exposure, including skin irritation, respiratory issues, and sensitization.
2. Part 1 – Sampling Strategy Development
   • The student was guided to identify worker groups: machinists, finishing workers, apprentices, and supervisors.
   • Sampling methodology was explained: personal air monitoring, area sampling, duration (full shift), and number of samples (ensuring statistical validity).
   • Justification for sampling frequency and selection of high-risk tasks was provided.
3. Part 2 – Data Analysis and Interpretation
   • The student was instructed on calculating concentrations from raw monitoring data.
   • Statistical analysis using EN689 and IHStats was explained, including derivation of mean, standard deviation, 95th percentile, and exposure distribution.
   • Mentor highlighted limitations of a 2-day sampling strategy and encouraged discussion on legislative compliance.
   • Guidance was provided on how to identify additional chemical hazards, such as airborne dust or fumes from grinding/polishing.
4. Part 3 – Report Writing
   • The mentor guided the student to structure the technical report with clear sections:
     • Executive Summary
     • Process Description (health effects, legislation)
     • Methods & Measurements
     • Evaluation of Results & Discussion
     • Conclusions (without recommending specific controls)
   • Emphasis was placed on professional presentation, correct referencing, and use of tables and figures to summarize statistical findings.

Learning Objectives Achieved

• Hazard Identification & Risk Assessment: Understanding exposure risks from MEA and TEA and related health effects.
• Occupational Hygiene Monitoring: Designing a sampling strategy, determining who to monitor, and selecting appropriate methodology.
• Data Analysis & Interpretation: Calculating concentrations, applying statistical methods (EN689/IHStats), and interpreting results.
• Compliance Assessment: Evaluating workplace exposures against legislation.
• Professional Reporting: Structuring and presenting a technical report consistent with AIOH guidelines.

Outcome

Through this guided approach:

• A sampling strategy was developed with identified worker groups and sampling methodology.
• Air monitoring data were analyzed, with statistical summaries and interpretation provided.
• The report addressed compliance, potential overexposure, and other hazards, supported by literature.
• The final submission demonstrated professional occupational hygiene reporting skills, meeting all marking criteria and learning objectives.

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