	Instruction on excreta and waste disposal problems, improvisation in the field, operation and maintenance of facilities, selection of disposal sites, etc. Use of training aids included: TF 8-1174 "Disposal of Human waste", Blackboard; sanitation models (table size), latrine box, pail latrine, barrel latrine, trough urinal, pipe urinal, sewage ditches; flush toilets, tip buckets, automatic siphon; Imhoff tank, Septic tank.