致3名维修人员死亡，山西医科大学公寓楼一泵站中毒和窒息事故调查报告公布

Core Viewpoint - The investigation report on the poisoning and asphyxiation accident at Shanxi Medical University identified inadequate safety management and non-compliance with operational procedures as the primary causes of the incident, resulting in three fatalities and significant economic losses [1][5]. Group 1: Incident Overview - On July 23, 2025, a major poisoning and asphyxiation accident occurred at the integrated pump station of Shanxi Medical University, leading to three deaths and direct economic losses of approximately 4.6 million yuan [1]. - The accident was attributed to the failure of on-site personnel to follow safety protocols, including not wearing personal protective equipment and performing unauthorized rescue operations [1][5]. Group 2: Accident Details - The accident involved Shanxi Kaisheng Trade Co., Ltd., which was responsible for the construction and installation of the pump station and related facilities [3]. - On July 21, 2025, maintenance personnel began unauthorized work on the sewage system without the necessary safety approvals, leading to the incident [3][4]. Group 3: Causes and Consequences - The direct cause of the accident was the entry of maintenance personnel into the pump station without proper ventilation, monitoring, or protective gear, resulting in exposure to toxic gases such as ammonia, hydrogen sulfide, sulfur dioxide, and methane [4][5]. - The investigation recommended legal action against the responsible parties, including the legal representative of Kaisheng Company and the site manager, while suggesting administrative penalties for other involved personnel [5].