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This article in JEQ

  1. Vol. 4 No. 3, p. 382-388
     
    Received: Aug 6, 1974
    Published: July, 1975


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doi:10.2134/jeq1975.00472425000400030022x

A Mound System for Onsite Disposal of Septic Tank Effluent in Slowly Permeable Soils with Seasonally Perched Water Tables1

  1. J. Bouma,
  2. J. C. Converse,
  3. R. J. Otis,
  4. W. G. Walker and
  5. W. A. Ziebell2

Abstract

Abstract

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.

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