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INC-2026-0089

LOWClosed

Reported by Sarah Kim — Water Treatment Operator

08 December 2025 at 11:30 amWater Treatment PlantHazard ReportChemical ExposureNight Shift

Incident Description

pH sensor on discharge line giving erratic readings. Manual testing confirmed normal pH levels. Sensor malfunction could have masked an actual exceedance if not caught.

Immediate Actions Taken

  • 1Sensor replaced
  • 2Manual monitoring implemented until replacement verified
  • 3Sensor calibration schedule reviewed

Likelihood x Consequence Matrix

InsignificantMinorModerateMajorCatastrophic
Almost Certain
Likely
Possible
Unlikely
Rare

Likelihood

2 / 5 — Unlikely

Consequence

2 / 5 — Minor

Risk Score

4/25

Failed / Breached Controls

Housekeeping Standards

Area not maintained to standard

LOW
Effectiveness
40%

Controls That Held

Site Inspections

Issue identified during routine inspection

Effectiveness
90%

Priority Questions

  • What were the direct and contributing causes of this incident?
  • Were all relevant procedures followed by personnel involved?
  • Was there adequate supervision at the time of the incident?

Follow-Up Questions

  • Were there any similar incidents in the past that could have predicted this?
  • Were all personnel adequately trained for the task being performed?
  • Were environmental conditions a contributing factor?

Systemic Questions

  • Does this incident indicate a gap in the current risk management framework?
  • Are there systemic issues with procedure adherence in this area?
  • Would additional engineering controls reduce the likelihood of recurrence?
11:15 am

Pre-start meeting completed

11:30 am

Incident occurred

11:35 am

Incident reported to supervisor

11:40 am

Area secured and barricaded

11:50 am

HSE team notified and on-scene

12:15 pm

Initial investigation commenced

12:30 pm

Report filed in SafetyScribe AI

Incident Details

Date & Time

08 December 2025 at 11:30 am

Location

Water Treatment Plant

Type & Category

Hazard Report

Chemical Exposure

Severity
Low
Status
Closed
Shift

Night Shift

Reported By

Sarah Kim — Water Treatment Operator

  • Water Treatment Operator — Sarah Kim
Night shift
pH SensorDischarge Line

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