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Neither should the irrigation system drain toward the drainfield.

#Septic as built drawing spokane county install#

Don't install an irrigation system in the drainfield.

You risk the possibility of food contamination.

Don't plant a vegetable garden over a drainfield.

Air is necessary for the drainfield to function efficiently.

Don't use landscaping plastic over the drainfield.

Soil compaction prevents oxygen from getting into the soil and prevents water from flowing away from the drainfield.

Keep large animals and livestock off the drainfield.

Oxygen is needed by bacteria to break down and treat sewage. Drainfields need air to function properly. This includes patios, carports, and other structures. All of the above suggestions apply to the replacement area as well.

It may be the only area with acceptable soil conditions in case you need to replace, repair, or add on to the drainfield.

Plant only grass or shallow-rooted plants over the drainfield.

For more information, see Landscape Your Drainfield. This can lead to clogged and damaged drain lines. Greater distance from the drainfield.) Trees and shrubs generally have extensive root systems that seek out and grow into wet areas, such asĭrainfields. (NOTE: Some soil conditions may require that plantings be kept an even

Keep trees and shrubs at least 30 feet away from the drainfield.

Drainfields are most efficient when the soil beneath the drainfield is not saturated. Water runoff from roofs and drainage ditches can saturate the soil.

Divert water away from the drainfield.

When there is more water than it can absorb, the system is unable to drain and filter effluent before it reaches groundwater. Drainfields do not have an unlimited capacity. Create a barrier if accessible to cars, livestock, or heavy equipment.

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Cars and heavy equipment should not park or drive over the drainfield doing so can crack pipes. Keep heavy equipment off your drainfield.For more information, see Locate Your Drainfield. When you know where it is located, it is easier to protect. Know where your drainfield and replacement area are located.Drainfield Do's and Don'ts Do These Things Landscaping Your Drainfield or Locating Your Drainfield.

#Septic as built drawing spokane county how to#

How to protect it (see "Drainfield Do's and Don'ts" for replacement area care). This is why it is important to know where the replacement area is located and Once a septic system has failed, it is too late to solve the problem by pumping your tank. (A reserve area should have been designated as part of the permit process for any sewage system installed since 1980.)

This is a designated area suitable for a new drainfield and must be treated in the same manner as your existingĭrainfield. Replacement (Reserve) AreaĮvery new home or building served by a septic system is required to have a designated replacement or reserve area. The type of soil also impacts the effectiveness of theĭrainfield for instance, clay soils may be too tight to allow much wastewater to pass through and gravelly soil may be too coarse to provide much treatment. Outward, eventually entering ground or surface water. The wastewater has passed into the soil, organisms in the soil treat the effluent before it percolates downward and The soil below the drainfield provides the final treatment and disposal of the septic tank effluent. The size and type of drainfield depends on the estimated daily wastewater flow and local soil conditions. The drainfield is generally located in a stretch of lawn in the back or side yard of a property. These processes work best where the soil is somewhat dry, permeable, and contains plenty of oxygen for several feet below the drainfield. Soil filters the wastewater as it passes (or "percolates) through the pore spaces and the soil microbes treat itīefore it eventually enters the groundwater. The effluent equally among the trenches in the drainfield, which is where the final treatment takes place.Įffluent trickles out of the pipes, through the gravel layer, and into the soil where further treatment occurs. NOTE: In most gravity systems the wastewater first flows into a distribution box (d-box) or tee, which then disburses To an absorption field, also known as a drainfield or leach field (see diagram of septic system/drainfield layout). Wastewater (or effluent) is discharged, either by gravity or pressure, After solids settle in the septic tank, the liquid The drainfield is a network of perforated pipes (or "laterals") laid in gravel-filled trenches or beds. How It Works l Drainfield Do's and Don'ts l