Septic systems fail because the soil becomes saturated and oxygen starved 

  • Saturated soil stops the flow of air into the ground, creating anaerobic bacteria (biomat). 

  • As long as the soil remains wet, anaerobic bacteria will multiply and biomat will cover more area.

  • This domino effect will continue until the entire surface is covered with biomat, resulting in failure. 

Experts agree the best way to stop biomat is by increasing the

amount of oxygen reaching the soil below the distribution system. 

  • The first thing needed to increase oxygen is reduce the system burial depth.   

  • The second thing is disperse the wastewater so it comes in contact with more surface area. 

Gravelless systems that store water (chambers, polypropylene peanuts)

repeatedly dose the same area, which effectively reduces the size the of the field.

  • When large amounts of water are used over a short period of time (laundry, baths/showers)                                      or a leaking faucet or toilet douse the field it becomes saturated. 

  • Because these systems create a dome effect, it is harder for oxgen to reach the saturated surface. 

GeoMat reduces the storage area, which results in wastewater coming in contact more surface area. 

  • When storage area is reduced, water travels quickly down through the sand beneath the mat resulting                      in different levels of sand being saturated only briefly, if at all. 

  • When effluent infiltrates sand & soil, it pulls air down behind it allowing liquids or gas to pass through it,          creating a dry, well-aerated environment. 

  • A well-aerated environment increases treatment efficiencies (GeoMat reduces BOD and TSS levels below                the requirement levels neededto qualify as a 'advanced treatment' system for residential wastewater). 

  • Anaerobic bacteria cannot exist in dry, well-aerated environment. 

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