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C 478范围内的项目除外。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1 由于应用的特殊性，应特别考虑绝缘和密封剂要求。 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。

1.1 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 C 478. 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 1 Insulation 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.