Div. B › Part 8 › 8.7 › 8.7.2 — Design and Construction Requirements

8.7.2.3 — Leaching Chambers within Leaching Beds

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(1) Leaching chambers are permitted for use in conjunction with an absorption trench, shallow buried trench, filter bed or Type A dispersal bed.

(2) Leaching chambers shall comply with the dimension requirements for either a Type I or Type II leaching chamber listed in Table 8.7.2.3.

(3) Leaching chambers shall conform to the requirements of IAPMO PS 63, “Plastic Leaching Chambers”.

(4) The header line and leaching chambers within a leaching bed shall be designed and constructed so that they can be detected by,

(a) magnetic means,

(b) means of a 14 gauge TW solid copper light coloured plastic coated tracer wire, or

Tables & Figures referenced

Table 8.7.2.3 : Leaching Chamber Dimensions : Forming Part of Sentence 8.7.2.3.(2)

Loading Table 8.7.2.3…

OBC Definitions

Defined terms on this page

absorption trench

means an excavation in soil, as defined in Part 8 of Division B, or in leaching bed fill, being part of a leaching bed, in which a distribution pipe or leaching chamber is laid that allows infiltration of the effluent into the soil, as defined in Part 8 of Division B, or leaching bed fill.

chamber

means a structure in a shallow buried trench that is constructed with an open bottom and that contains a pressurized distribution pipe.

header

means a vent pipe that connects two or more vent stacks or stack vents to open air.

header line

means a line of pipe with watertight joints installed in a sewage system for the purpose of distributing effluent from a treatment unit to the distribution pipe in a leaching bed.

leaching

means dispersal of liquid by downward or lateral drainage or both into permeable soil, as defined in Part 8 of Division B, or leaching bed fill.

leaching bed

means an absorption system constructed as absorption trenches or as a filter bed, located wholly in ground or raised or partly raised above ground, as required by local conditions, to which effluent from a treatment unit is applied for treatment and disposal and that is composed of, (a)the soil, as defined in Part 8 of Division B, leaching bed fill or other filter media that is contained between the surface on which the sanitary sewage is applied and the bottom of the bed, (b)the leaching chamber or the distribution pipe and the stone or gravel layer in which the distribution pipe is located, and (c)the backfill above the distribution pipe or the leaching chamber, including the topsoil and sodding or other anti-erosion measure, and the side slopes of any portion elevated above the natural ground elevation.

leaching chamber

means a formed structure with an open bottom and permeable sidewalls installed in a leaching bed for the purpose of distributing effluent from a treatment unit to the soil, as defined in Part 8 of Division B, or leaching bed fill in the leaching bed.

listed

means equipment or materials included in a list published by a certification organization accredited by the Standards Council of Canada.

shallow buried trench

means an absorption trench that contains a chamber or leaching chamber.

type a dispersal bed

means a leaching bed that receives effluent from a Level IV treatment unit as described in Table 8.6.2.2. of Division B and that is comprised of a stone layer or leaching chambers installed over an unsaturated sand layer as described in Subsection 8.7.7. of Division B.

construct

to do anything in the erection, installation, extension or material alteration or repair of a building and includes the installation of a building unit fabricated or moved from elsewhere; Act

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