Research Article
Feb 1981
Failure Analysis of Large Septic Tank Systems
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VIEW THE REPLYPublication: Journal of the Environmental Engineering Division
Volume 107, Issue 1
Abstract
The differences in design criteria between single residence on-site sewage disposal systems and large on-site systems were evaluated. The allowed loading for large systems on coarse sand is 45% higher, while the actual loading based on 1970 Census data may be 213% higher, as compared to household systems. Surveys in the state of Washington show that most system failures are associated with impervious soil type, underdesign and age of the system. Calculations indicate a serious under-reporting of the number of failures of both small and large on-site systems, thereby underestimating a major public-health risk.
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Published In
Journal of the Environmental Engineering Division
Volume 107 • Issue 1 • February 1981
Pages: 229 - 240
Copyright
© 1981 American Society of Civil Engineers.
History
Published in print: Feb 1981
Published online: Feb 11, 2021
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Authors
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Foppe B. DeWalle
Assoc. Prof., Dept. of Environmental Health, Univ. of Washington, Seattle, Wash. 98195
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Terms of Use: ASCE Library Cards are for individual, personal use only. Reselling, republishing, or forwarding the materials to libraries or reading rooms is prohibited.