Absorption trench definition

Absorption trench means an absorption system consisting of a series of narrow excavated trenches utilizing drain media, chambers, or bundled synthetic aggregate units.

Absorption trench means an excavation in which an absorption line is laid.

Absorption trench means standard trenches, shallow trenches with capping fill, and chambered trenches constructed to receive and to distribute effluent in such a manner that the effluent is effectively filtered and retained below ground surface.

Examples of Absorption trench in a sentence

• Exception: Absorption trench systems that use the loading rate calculations for absorption beds shall have a minimum of 6” of crushed stone below the distribution pipe.

• Absorption trench systems may be constructed using prefabricated leaching chambers with a minimum H-10 structural loading rating, instead of crushed stone.

• Absorption trench systems placed in earth fill can only be installed over natural soils with a percolation rate range between five and 60 minutes per inch; and absorption bed systems over soils with a percolation rate range of five to 30 minutes per inch.

• Absorption trench construction will involve: excavating the trench (around 650 mm deep); filling the base of the trench with gravel or broken rock; laying a perforated 100 mm PVC pipe in the centre of the trench; overfilling the pipe with gravel or broken rock (generally to a total depth of around 450 mm); laying a separation layer of black polyurethane or similar; and compacting backfill over the top (around 200 mm depth) with a slight mound left above surrounding ground level to allow for settlement.

• The installation of the following disposal systems is permitted with the approval of Council: Absorption trench or Evapo-Transpiration Absorption (ETA) Beds as per AS/NZS 1547; Sub surface irrigation; and Mound Systems.

More Definitions of Absorption trench

Absorption trench means a ditch or a trench installed into soil, permeable saprolite, or diggable bedrock, with vertical sides and a substantially flat bottom.

Absorption trench means an absorption system that consists of excavations 18 to 36 inches in width where the distribution system is laid for the purpose of distributing pretreated waste effluent into the ground.

Absorption trench means a long narrow area which includes a pipe for the distribution of septic tank/wastewater treatment effluent.

Absorption trench means an absorption system that consists of excavations less than or equal to 3 feet in width where the distribution system is laid for distributing pretreated waste effluent into the ground.

Absorption trench means a trench excavated between 18 to 36 inches in width for the purpose of distributing pretreated septic system effluent into the ground.

Absorption trench means a disposal field that is a shallow ditch with vertical sides lined with crushed stone 48” or less in width that releases wastewater into the soil through perforated distribution lines.

Absorption trench means an excavation, not more than 36 inches in effective width, in which a single line of pipe is placed to distribute and dispose of sewage liquids or treatment plant effluent.