Abstract |
The Household Sewage Disposal Project, inaugurated in 1946, required emphasis on special testing and investigation work. Specific areas examined include: literature review; investigation of existing installations; operation of septic tanks and subsurface systems; sampling; laboratory investigation of soil clogging; 10 and 20-year cleaning intervals; extreme freezing conditions; effect of tree and shrubbery roots; effects of residential garbage grinding; distribution boxes, investigation of tank proportions; discharge of grease; relationship of sodium and calcium to soil-clogging action; relationships among seepage, evaporation, and transpiration; new methods of disposal; and development of standards. |