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Exposure to Biohazards

机译:暴露于生物危害

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Most sewage collection and treatment systems in the U.S. are 30 to 100 years old [EPA(b)] with a total estimated value exceeding $1 trillion [EPA(a)]. EPA estimates that in the year 2000, more than 1.2 billion gallons of raw sewage poured into waterways due to overflow, blockage, leakage or other system faults [EPA(b)]. The construction projects needed to correct these problems will be many and enormous. Upgrades to the City of Atlanta sewage system alone are estimated to cost around $3 billion (Copeland A3). The problem is not limited to large metropolitan areas. A study by the Minnesota Pollution Control Agency suggests that $1.2 billion must be invested in wastewater facilities in rural Minnesota over the next 20 years (Franklin B3). As the nation's urban infrastructure continues to expand, age and deteriorate, and as the public's concern for environmental quality increases, construction work in active sewer lines and wastewater treatment plants (WWTPs) will grow. As a result, more construction contractors and workers will be exposed to the hazards associated with working in these locations.
机译:美国大多数污水收集和处理系统已有30到100年的历史[EPA(b)],总价值估计超过1万亿美元[EPA(a)]。 EPA估计,在2000年,由于溢流,阻塞,泄漏或其他系统故障,有超过12亿加仑的未处理污水倒入水道[EPA(b)]。纠正这些问题所需的建设项目将是很多很多的。仅亚特兰大市污水处理系统的升级,估计费用约为30亿美元(Copeland A3)。问题不仅限于大都市地区。明尼苏达州污染控制局的一项研究表明,未来20年必须在明尼苏达州农村的废水处理设施上投资12亿美元(Franklin B3)。随着国家城市基础设施的不断扩大,老化和恶化,以及公众对环境质量的关注日益增加,活跃的下水道和污水处理厂(WWTP)的建设工作将不断增加。结果,更多的建筑承包商和工人将面临与在这些地点工作有关的危险。

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