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Letter of Transmittal
III STUDY OF TWOCHAMBER SEPTIC TANKS HAVING DIFFER
IV RECOMMENDATIONS FOR THE DESIGN OF SIMPLE FARM
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2-chamber tank 72 hours 72-hour total A. M. Buswell amount of sewage August September October average sewage flow bathtub biological survey capita per day Chamber of Tank Chemical and biological connected to farm December 12 December 18 depth of sewage design of farm dosed with city dosing tank Effluent From Chamber farm homes farm septic tanks flow of sewage gallons per capita Illinois State Water July August September kitchen sink measuring rod multiple-chamber tanks Number outlet period of 72 put into operation residue on evaporation Samples of Effluent sampling points scum and sludge second chamber settleable solids plotted shape of cross-section shown in Fig single-chamber tank sludge accumulation sludge measurements sludge storage tank temperature tanks treating city tanks treating farm tanks were put three-chamber tank toilet total retention period treating city sewage treating farm sewage turbidity two-chamber tank Volume of scum water consumption water meter waters of Illinois