1.1 本规范涵盖了整体或分段预制混凝土水和废水结构的建议设计要求和制造实践，但混凝土管道、箱涵、公用设施结构、化粪池、隔油池和规范范围内的项目除外 C478/C478M . 注1: 水和废水构筑物被定义为太阳能加热池、蓄水池、储槽、淋洗池、扩展曝气池、湿井、泵站、配电箱、油水分离器、处理厂、粪坑、集水池、滴口和类似构筑物。 注2: 由于应用的特殊性，应特别考虑安装和密封剂要求。 1.2 以英寸-磅为单位的数值应视为标准值。括号中给出的值仅供参考。 1.3 本标准并非旨在解决与其使用相关的所有安全问题（如有）。本标准的用户有责任在使用前制定适当的安全、健康和环境实践，并确定监管限制的适用性。 1.4 本国际标准是根据世界贸易组织技术性贸易壁垒（TBT）委员会发布的《关于制定国际标准、指南和建议的原则的决定》中确立的国际公认标准化原则制定的。

1.1 This specification covers the recommended design requirements and manufacturing practices for monolithic or sectional precast concrete water and wastewater structures with the exception of concrete pipe, box culverts, utility structures, septic tanks, grease interceptor tanks, and items included under the scope of Specification C478/C478M . Note 1: Water and wastewater structures are defined as solar heating reservoirs, cisterns, holding tanks, leaching tanks, extended aeration tanks, wet wells, pumping stations, distribution boxes, oil-water separators, treatment plants, manure pits, catch basins, drop inlets, and similar structures. Note 2: Installation and sealant requirements should receive special consideration due to special features of the application. 1.2 The values stated in inch-pound units are to be regarded as the standard. The values given in parentheses are for information only. 1.3 This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety, health, and environmental practices and determine the applicability of regulatory limitations prior to use. 1.4 This international standard was developed in accordance with internationally recognized principles on standardization established in the Decision on Principles for the Development of International Standards, Guides and Recommendations issued by the World Trade Organization Technical Barriers to Trade (TBT) Committee.