Subsurface incorporation places untreated septage
just below the soil surface, reducing odors and
health risks while fertilizing and conditioning the
soil. Septage can only be applied to slopes less than
8%, and the soil depth to seasonal high water table
must be at least 20 inches (or as mandated by local
regulations). A holding facility is required during
periods of wet or frozen ground. To prevent soil
compaction and allow sufficient infiltration,
equipment must not be driven over the site until 1 to
2 weeks after application.