Agenda - Council - 11/25/1997 - Laserfiche WebLink

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jI Se -wage disposal systems § 8.30 Distribution Pipes are perforated pipes or agricultural drain tiles that are used to distribute sewage tank effluent in a soil treatment system. Perforated pipe used for distribution pipes shall have one or more rows of holes of no more than 1/2-inch in diameter spaced no more than 36 inches apart. Holes shall be spaced to prevent bearing capacity of not less than 800 pounds per linear foot. Distribution Device is a device which is used to distribute sewage tank effluent to the distribution pipes, including but not limited to distribution boxes, drop, boxes, and valve boxes. Dosing Chamber (or pump pit or wet well) is a tank or separate compartment following the sewage tank which serves as a reservoir for the doing device. Drainfield is also called tile disposal field or soil absorption field and uses distribution pipes placed in favorable soil so that sewage from the septic tank can percolate through and into the soil. Dwelling is any building or place used or intended to be used by human occupants as a single-family or two-family unit. Filter Material is clean rock, crushed igneous rock, or similar insoluble, durable, and decay -resistant material free from dust, sand, silt, or clay. The size shall range from 1.25-inch minimum diameter to 2.5 inches effective diameter. Holding Tank is a watertight tank for storage of sewage until it can be transported to a point of approved disposal. Impermeable, with regards to soils, is a soil horizon or layer having a vertical permeability less than 1-inch in 24 hours and shall be considered impermeable. - Individual Sewage Treatment System is a sewage treatment system, or part thereof, serving a dwelling or other small living or business unit, or group thereof, which utilizes subsurface soil treatment and disposal. Lawn Area is the area bounded by the dimensions required for the proper location of the soil treatment area. Mottling is a zone of chemical oxidation and reduction acti-,-ity appearing as splotchy patches of red, brown, orange and gray. Mound System is a system where the soil treatment area is built above the ground to overcome limits imposed by proximity to water table or bedrock, or by rapidly or slowly permeable soils. Percolation Rate is the time rate of drop of a water surface in a test hole as specified in §5.30.04 Subd.6 (Final Treatment And Disposal Standard System) of this chapter. Plastic Limit is soil moisture content below which the soil may be manipulated for purposes of installing a soil treatment system and above -,vhich manipulation will cause compaction and puddling. If a fragment of soil can easily= Printed 12/28/90 Page 237 1915