History and investigation of the chemical odors and explosion in the University Avenue sanitary sewer.

IF 1.5 4区 医学 Q4 ENVIRONMENTAL SCIENCES Journal of Occupational and Environmental Hygiene Pub Date : 2024-03-01 Epub Date: 2024-03-26 DOI:10.1080/15459624.2024.2309885
Adam Krajicek, Neil G Carlson, Caylin Crawford
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Abstract

During the summer of 2022, a fire and explosion occurred in a sanitary sewer tunnel adjacent to the University of Minnesota Twin Cities campus, propelling utility maintenance covers several meters into the air and jeopardizing the safety of the public and emergency responders. The investigation into the explosion highlighted the complex variables involved in the response to sanitary sewer events. This case study outlines current approaches and proposes recommendations for agencies to be better prepared to prevent, detect, and respond to sewer-related incidents in the future. Our recommendations include the following: (1) proactive use of remote volatile organic compound (VOC) and lower explosive limit (LEL) monitoring in sanitary sewer tunnels, especially downstream of waste discharge sites; (2) incident responders should have access to instruments that measure oxygen, LEL, VOC concentration, carbon monoxide, and hydrogen sulfide; (3) better characterization of the relationship between sewer pressurization, elevation profiles, and vapor movement; (4) verification processes for oil/water separators used by industrial facilities discharging into the sanitary sewer system; (5) installation of ventilated or anchored pressure relief utility maintenance covers where allowed by code; and (6) building maintenance protocols that include regular drain flushing to keep drain traps filled. These measures are recommended to protect infrastructure and the health and safety of the public and the responders.

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大学路卫生下水道化学气味和爆炸的历史和调查。
2022 年夏天,明尼苏达大学双子城校区附近的卫生下水道隧道发生火灾和爆炸,将公用设施维护盖推向数米高空,危及公众和应急人员的安全。对爆炸事件的调查凸显了应对卫生下水道事件所涉及的复杂变量。本案例研究概述了当前的方法,并为各机构提出了建议,以便在未来更好地预防、检测和应对下水道相关事件。我们的建议包括以下内容:(1) 在卫生下水道隧道中,尤其是在废物排放点的下游,积极使用远程挥发性有机化合物 (VOC) 和爆炸下限 (LEL) 监控;(2) 事故响应人员应该能够使用测量氧气、爆炸下限 (LEL)、挥发性有机化合物浓度、一氧化碳和硫化氢的仪器;(3) 更好地描述下水道加压、海拔剖面和蒸汽移动之间的关系;(4) 对排入卫生下水道系统的工业设施所使用的油水分离器进行验证;(5) 在法规允许的情况下,安装通风或锚定的泄压公用设施维护盖;以及 (6) 制定建筑维护协议,包括定期冲洗下水道,以保持下水道疏水阀的畅通。建议采取这些措施来保护基础设施以及公众和救灾人员的健康和安全。
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来源期刊
Journal of Occupational and Environmental Hygiene
Journal of Occupational and Environmental Hygiene 环境科学-公共卫生、环境卫生与职业卫生
CiteScore
3.30
自引率
10.00%
发文量
81
审稿时长
12-24 weeks
期刊介绍: The Journal of Occupational and Environmental Hygiene ( JOEH ) is a joint publication of the American Industrial Hygiene Association (AIHA®) and ACGIH®. The JOEH is a peer-reviewed journal devoted to enhancing the knowledge and practice of occupational and environmental hygiene and safety by widely disseminating research articles and applied studies of the highest quality. The JOEH provides a written medium for the communication of ideas, methods, processes, and research in core and emerging areas of occupational and environmental hygiene. Core domains include, but are not limited to: exposure assessment, control strategies, ergonomics, and risk analysis. Emerging domains include, but are not limited to: sensor technology, emergency preparedness and response, changing workforce, and management and analysis of "big" data.
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