OBC 2006 › Division B

8.7.5.3.

Version 0 — in force 31 December 2006

In force

Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

In force

Verified · covered Verified against the 2006-12-31–2007-04-01 consolidation, whose range covers the query date. How to read this

Provenance

OBC 1997 · continues from 8.7.5.3. — Pro

Base · O. Reg. 350/06 · ext← current

Original — base regulation

O. Reg. 503/09, cl. 122 · ext v1 →

In force 2010-01-01

Next: O. Reg. 503/09, cl. 122 · ext (not in force until 2010-01-01) v1 →

OBC 2012 · continues as 8.7.5.3. — Pro

8.7.5.3. — Construction Requirements

(1) Sentences 8.7.4.2.(1), (2) and (4) to (11) apply to the construction of a filter bed.

(2) The lines of distribution pipe shall be evenly spaced over the surface of the filter medium to which the sanitary sewage is applied.

(3) The filter medium shall have a minimum depth of 750 mm below the stone layer and shall be clean sand comprised of particles ranging in size between the limits of,

(a) an effective size of 0.25 mm with a uniformity coefficient not less than 3.5,

(b) an effective size of 2.5 mm with a uniformity coefficient not greater than 1.5, and

(4) The filter medium shall be unsaturated for its entire depth.

(5) Where there is more than one filter bed in a leaching bed, the filter beds shall be separated by at least 5 m between the distribution pipes of the filter beds.

(6) The base of the filter medium shall extend to a thickness of at least 250 mm over an area meeting the requirements of the following formula:

where,

A = the area of contact in square metres between the base of the filter medium and the underlying soil,

Q = the total daily design sanitary sewage flow in litres, and

T = the lesser of 50 and the percolation time of the underlying soil.

(7) The stone layer required by Clause 8.7.3.3.(1)(b) shall be not less than 900 mm above the high ground water table, rock or soil with a percolation time more than 50 minutes,

Editor's note

This map follows the as-filed text of O. Reg. 350/06 for Article 8.7.5.3. of Division B, which closes Sentence (7) ('... percolation time more than 50 minutes') with a comma. As of its September 24, 2009 re-render the e-Laws consolidation editorially substitutes a period at the end of that sentence, with no amending regulation making the change — no regulation in force on that date amends this Article. This map preserves the as-filed comma. The divergence persists into the later version of this Article.

Text · e-Laws consolidated snapshot