This guide was issued by the U.S. Environmental Protection Agency for the use of personnel who inspect the day-to-day construction of municipal wastewater treatment facilities. It is intended to assist construction inspectors in examining the detailed construction of the structural, mechanical, and electrical features of a modern facility. Volume I covers the following topics: General information; layout and quantity surveys; clearing and grubbing; earthwork; underground pipe systems; paving; grassing, planting and erosion control; and concrete for structures.