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A Mound System for Onsite Disposal of Septic Tank Effluent in Slowly Permeable Soils with Seasonally Perched Water Tables
Author(s) -
Bouma J.,
Converse J. C.,
Otis R. J.,
Walker W. G.,
Ziebell W. A.
Publication year - 1975
Publication title -
journal of environmental quality
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.888
H-Index - 171
eISSN - 1537-2537
pISSN - 0047-2425
DOI - 10.2134/jeq1975.00472425000400030022x
Subject(s) - subsoil , effluent , septic tank , soil water , geology , environmental science , hydrology (agriculture) , geotechnical engineering , soil science , environmental engineering
Slowly permeable soils with seasonal high water tables cannot be used for conventional subsurface disposal of septic tank effluent. An alternative mound system is described which consists of soil‐covered seepage trenches on top of 60 cm of sand fill deposited on the original soil surface. The bottom area of the mound is sufficiently large to allow soil absorption of effluent considering the low conductivity of the subsoil, which was measured in situ with the crust test procedure. Monitoring data for four experimental mound systems and design and construction criteria are discussed.