scope:

PURPOSE AND SCOPE.

This document provides information, guidance, instructions, and criteria for the design of sanitary and industrial wastewater gravity collection systems and pumping facilities.

a. Sewers. This document prescribes the approach, requirements, criteria, considerations, and hydraulic calculations used in the design of gravity sewers. Acceptable materials and appurtenances are also presented. Alternatives to gravity systems are described, but design criteria is not given.

b. Pumping Stations. Facilities covered in these instructions include pump and ejector stations required for (1) removal of sanitary and industrial wastes from remote or low lying areas of sewers, (2) controlled introduction and lifting of raw wastewater into the waste treatment plant, (3) transfer of recycled and bypassed flows throughout the plant, and (4) discharge of treated scum; these facilities are presented in TM 5-814-3/AFM 88-11, Vol. 3. The design of a wastewater pumping station will typically include site improvements, structures, screening, and flow monitoring devices, pumping units, pump drives, system controls and instrumentation, mechanical and electrical components, interior piping, underground force mains, valves, and appurtenances. Small grinder pumps such as those used in low pressure systems are not included in this manual.

APPLICABILITY.

These instructions are applicable to all USACE elements who plan and design wastewater facilities at fixed Army and Air Force installations.