The Noise Study for the New Sales Gas Custody Transfer Metering Station at the SWCC Yanbu Phase-3 Project represents a comprehensive industrial hygiene and environmental assessment undertaken to quantify and control noise exposure risks for personnel and to evaluate potential occupational hazards arising from industrial activities within the facility. The study focused on sound levels from operational equipment, adherence to noise exposure standards, and recommendations to ensure compliance and safety.
Client Background & Project Context
The SWCC (Saline Water Conversion Corporation) Yanbu Phase-3 development encompasses advanced infrastructure to support gas metering for industrial and utility applications. Custody transfer metering stations are critical nodes in the gas value chain where accurate measurement and safe handling of sales gas are essential. Within this context, industrial hygiene factors — particularly noise exposure — become a crucial aspect of occupational health management.
Scope of Work
The primary focus of this engagement included:
- Quantitative Noise Assessment across operational zones where mechanical equipment operates.
- Evaluation of Personal Exposure to physical hazards including noise, heat, and vibration.
- Identification of High-Risk Areas requiring control measures or personal protective equipment (PPE).
- Benchmarking against Exposure Limits and accepted industrial hygiene standards.
In addition to noise monitoring, assessments were made for other physical and environmental exposures as part of a holistic safety evaluation. These assessments were benchmarked against relevant exposure limit frameworks to determine compliance and risk.
Noise Study Objectives
Sound and noise exposure pose both short-term and long-term risks to worker health when not properly controlled. The study aimed to:
- Measure ambient and equipment-related noise in critical operational areas.
- Compare measured levels with international occupational exposure limits.
- Classify work zones by noise severity for targeted mitigation.
- Provide actionable insights for engineering and administrative controls.
Methodology: Industrial Noise Assessment
A systematic approach was used to conduct the noise survey:
1. Site Walk-Around Survey
A detailed walk-around inspection was performed to identify potential hazards, including locations of high noise emission from machinery, such as compressors and heaters.
2. Noise Level Monitoring
Noise measurements were taken using calibrated sound level meters:
- Steady-State Zones: Areas with stable noise patterns were assessed to estimate full-shift exposure.
- Variable Noise Zones: For zones with fluctuating noise levels (e.g., maintenance areas), extended monitoring was performed to capture noise dose variability.
A general rule applied: noise exceeding 90 dB(A) where a person must shout to be understood at 1 m distance was flagged for further review and control.
3. Exposure Evaluation
Noise data were benchmarked against accepted occupational limits and exposure criteria to evaluate compliance and identify areas requiring control or restriction. Repeat measurements were recommended due to factors such as equipment aging and operational changes.
Key Findings & Analysis
The study revealed varying noise levels across the facility:
Equipment-Level Noise
- Newly installed heaters and compressors were mostly within acceptable limits, under 85 dBA at source well below critical exposure thresholds.
High Exposure Zones
Some key areas were identified with elevated noise exposure levels:
- Utility and Refinery Zone: Noise levels consistently above 90 dBA.
- UB-8 Top Platform: Measured noise exceeded 100 dBA, indicating high risk.
- Coke Cutting Platform: Experienced significant persistent noise loads.
Personnel working in these high noise zones were classified as high-risk for noise exposure without protective measures.
Health & Safety Implications
Sustained exposure to noise levels above critical thresholds:
- Increases the risk of hearing loss and other auditory disorders.
- May lead to fatigue, communication difficulty, and reduced task performance.
- Could contribute to stress and decreased worker well-being if left uncontrolled.
The study highlighted the need to designate restricted zones and implement suitable PPE protocols.
Recommendations
To mitigate noise exposure risks, the study recommended:
Engineering Controls
- Install noise barriers or acoustic enclosures around high-noise equipment.
- Implement equipment maintenance schedules to reduce mechanical noise.
- Explore vibration damping to minimize structure-borne noise transmission.
Administrative Controls
- Rotate personnel to limit exposure duration in high noise zones.
- Update training programs focusing on noise hazards and hearing conservation.
- Regularly reassess noise levels after operational changes.
Personal Protective Equipment (PPE)
- Mandatory use of ear protection (earplugs/earmuffs) for workers in zones exceeding 90 dBA.
- Monitoring and enforcement of PPE usage in designated restricted areas.
Conclusion
The Noise Study for the SWCC Yanbu Phase-3 Custody Transfer Metering Station provided an essential evaluation of occupational noise exposures and compliance benchmarks for critical industrial operations. The assessment identified areas of concern, quantified risk levels, and outlined robust measures for noise control. Implementation of the recommended controls will improve worker safety, support regulatory compliance, and fortify the project’s environmental and health credentials.