"EPA/430-9-75-009." "1969." "430/9-75-009" (EPA publication number) added in pen to cover at later date Includes bibliographical references (pages 91-92).

Part I. Septic tank -- soil absorption systems for private residences -- Introduction -- Definitions -- Suitability of soil -- Percolation tests -- Soil absorption system -- Selection of a septic tank -- General information on septic tanks -- Inspection -- Part II. Septic tank -- soil absorption systmes for institutions, recreational areas, and other establishments -- Introduction -- Estimates of sewage quantities -- Estimates of soil absorption areas -- Building sewers -- Collection systems -- Grease traps -- Septic tanks for institutional systems -- Dosing tanks -- Sand-filter trenches -- Subsurface sand filters -- Superficial sand filters -- Chlorination -- Appendices -- Introduction to sppendices -- A. Soil absorption capacity -- B. Suggested ordinance -- C. Engineering information forms -- D. Drainage fixture unit values -- E. Suggested specifications for watertight concrete -- F. Industrial waste treatment -- Bibliography.