A Thorough Industrial Hygiene Hazard Analysis Process Leads to Selecting the Proper Controls for Worker Protection
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Type:  Lessons Learned

Publisher:  CH2MHill Plateau Remediation Company (Richland, WA - Hanford Site), Richland, WA - Hanford Site (CHPRC)

Published As:  Public

Date: 

Topics:  Chemical Safety, Occupational Safety and Health, Waste Management, Work Management/Planning

Workers at the Environmental Restoration and Disposal Facility were untarping waste containers when a personal ammonia monitor worn by a worker alarmed. A peak reading of 302 parts per million (ppm) was recorded. This exceeded the Immediately Dangerous to Life and Health Level for ammonia of 300 ppm. Controls were not in place to protect workers from ammonia exposure.

Lesson Learned: Reliance on monitoring real-time data in the breathing zone of workers did not indicate potential hazard from the actual source. The hazard evaluation also did not include any monitoring or historical data to evaluate the potential hazard from inside the ZP-1 Roll-On/Roll-Off waste containers. A robust hazard analysis process includes monitoring hazards from the source in addition to the breathing zone and a review of historical data to insure proper controls are selected for worker protection.

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