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Description |
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Components |
| Conventional (In ground) |
On-site Subsurface May need pump-depends on house location |
Good history Most economical |
Need 36" suitable soil Need area for reserve |
Septic tank D-Box Drainfield |
| Conventional (In ground) + Pre-treatment) |
On-site Subsurface Needs pretreatment unit |
Allows development | Need 30" suitable soil Need area for reserve Cost Pretreatment problems |
Septic tank D-Box Drainfield Pretreatment unit |
| Low pressure dist (LPD) | On-site Subsurface Up or down slope to house |
Requires lee area Dosed system will last longer |
Need suitable soil Need area for reserve Possible pump problems Possible line clogging |
Septic tank, pump pump system, distribution field |
| Drip disposal (Perc-rite) (Whitewater) |
On-site Subsurface Up or down slope to house |
Requires less area Installed by plowing Contour not an issue |
Needs suitable soil Need area for reserve Possible pump & control panel problems Cost |
Septic tank, pump system, control panel/ disc filter pressure drip field |
| Shallow placed D.F. | On-site Subsurface Effluent is pretreated |
Not a discharge Allows development |
Need 30" to rock Need 24" to water table Possible pretreatment maintenance Cost |
Septic tank, pump system, D-box, shallow drainfield pretreatment unit |
| Puraflo | Peat Moss system
Up or down slope to house Cleared experimental status |
Requires small area
Less stringent soil Seem to be working very well Comes as package |
Need 100% reserve area
Possible pump problems Slope limitations Cost |
Septic tank, pump system, peat units, small drainfield |
| Spray Irrigation | On-site
Up or down slope to house Sprays on ground surface Wooded sites are better |
Only need 12” soil
Has required buffers Pre-treated Chlorinated |
Need a large lot - 4 acre +
Requires monitoring Slope limitations Possible pump maint. |
Septic tank, pump system, pretreatment unit, spray field |
| Alterntive Discharge (Sandfilter) (ATU) (Combined) | Discharge system
Need General Permit from DEQ Requires maint. and monit. contract |
No soil requirements | Need discharge channel ditch or stream
Possible future maint. Cost |
Septic tank, pump system, treatment unit, chlorination, post aeration |
| Aquarobic Filter Bed | **Experimental
Up or down slope to house Construction permit only |
Only need 12” soil |
Need 100% reserve
Slope limitations Possible pump problems Cost |
Aquarobic ATU, pump chamber, sand mound |
(Courtesy of Greenway Engineering, Winchester, VA 540-662-4185)
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