- 37 people sought medical attention during high activity from summer 2024 to summer 2025.
- Venting from MEG tanks, containing nitrogen and water vapor, was the main cause.
- Insufficient risk assessment and follow-up led to repeated incidents.
- Measures include improved monitoring, sampling, and a local health office.
Incident Overview
Equinor's investigation into exposure incidents at Hammerfest LNG identified venting from MEG tanks as the primary cause. The vented gas, consisting of nitrogen and water vapor, descended to ground level due to wind conditions, affecting personnel working nearby.
Health Impact
During a period of high activity from summer 2024 to summer 2025, 37 individuals sought medical attention on four occasions, with nine absent from work. Symptoms included headaches, nausea, and dizziness, though long-term health effects are unlikely.
Investigation Findings
The report highlighted insufficient risk assessment and follow-up as reasons for the repeated incidents. Changes in the well stream or temperature fluctuations altered the gas composition, causing odors and discomfort when vented gas reached ground level.
Risk Management Improvements
Equinor implemented measures to reduce exposure risk, including a temporary filtration solution, enhanced monitoring, and regular sampling of vented gas. Updated introduction programs and instructions aim to strengthen safety and reporting culture, supported by a new local health office at Melkøya.
