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Simulated workplace
Scenario · Health, Safety, Environment and Training

Investigate the eastern boundary dust complaint

You are the Environmental Coordinator at Wattle Creek Quarry.

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The situation

What has happened

On 8 September 2026 a neighbour on the eastern boundary of Wattle Creek complained of dust over their property between 2:00 pm and 4:00 pm during strong westerly winds. The complaint is logged in the Hazard and Incident Register. The quarry's environmental authority sets dust limits at the boundary and requires complaints to be investigated and responded to within five working days. The trigger action response plan requires the crusher sprays to be running and the water cart on the haul roads above a set wind speed, and stockpile work to stop above a higher wind speed. The water cart WC03 has a leaking spray bar valve and was in the workshop for part of the afternoon.

Your brief. Investigate the complaint under the Environmental Policy using the monitor data, the water cart and crusher spray logs and the trigger action response plan, determine whether the controls were applied, and draft the response to the neighbour and the corrective actions for the HSE and Training Manager.
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Tasks

Deliverables

  • Timeline and control comparison
  • Reportability decision with reasoning
  • Draft response to the neighbour
  • Updated register entry with corrective actions

Documents to use

Systems to use

Hazard and Incident Register

The register of hazards, near misses, high potential incidents, injuries, environmental events and complaints with investigation status and corrective actions.

Mobile Plant and Prestart Register

The fleet list with each machine's prestart inspections, defects, service status and whether it is available for operation.

For trainers and assessors

Units of competency

Current on training.gov.au for the Resources and Infrastructure Industry Training Package as at 10 September 2026.

RIIENV401ESupervise dust and noise control
RIIENV402EImplement and monitor environmental policies
RIIENV301EConduct atmospheric monitoring
RIIGOV401EApply, monitor and report on compliance systems

Qualifications

RII40120Certificate IV in Surface Extraction Operations
RII50120Diploma of Surface Operations Management
Assessor notes

What to look for

Evidence guide

Look for a timeline built from data rather than assumption, a clear finding on whether the trigger action response plan was followed when the water cart was unavailable, a correctly reasoned reportability decision, and actions that add a backup water cart or a stop rule rather than only reminding people. The neighbour response must be honest and within the five day period.

The student's evidence summary lists every record they created or changed in the systems named above, their notes and the tasks they ticked. Verify it against the deliverables and your own assessment tool.