Before revision: Several factors may reduce observed percolation rates when the drain field receives anoxic septic tank effluent:Alth, Max & Charlotte "Constructing and Maintaining your Well & Septic System" Tab Books (1984) p.217 Microbial colonies catabolizing soluble organic compounds from the septic tank effluent will adhere to soil particles and reduce the interstitial area available for water flow between soil particles.
After revision: A drain field being installed|alt=|329x329pxSeveral factors may reduce observed percolation rates when the drain field receives anoxic septic tank effluent:Alth, Max & Charlotte "Constructing and Maintaining your Well & Septic System" Tab Books (1984) p.217 Microbial colonies catabolizing soluble organic compounds from the septic tank effluent will adhere to soil particles and reduce the interstitial area available for water flow between soil particles.