IMPLEMENT EROSION AND
SEDIMENT CONTROL MEASURES
PRE-READER
AHCSAW302A
Class Pre-Reader
Version 1
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Class Pre-Reader
EC AHCSAW302A PR Implement erosion and sediment control measures Version 1
91563NSW Certificate IV Environmental Management and Sustainability
© EcCell Greenskills Training Pty Ltd. 2013
Dated 28.08.12
Printed 02.03.13
2
Class Pre-reading Definitions
The pre reading provides definitions
An impediment to surface water placed on or near a contour along the surface to be
Barrier
protected (slopes or channels). Barriers can also be used to divert surface water flow to
a stabilised outlet. Various materials can be used depending upon the quantity and
depth of water and local availability of materials. Common materials include brush,
compacted earth, gravel, hay, rock, sand bags, silt fences and straw bales.
Basin
A hollow or depression within which water can be contained.
Batter
The side-slope of an embankment or cutting.
Biodiversity
The number of species of vegetation and wildlife in a given habitat. Rainforests, which
typically have many different plant and animal species, are said to be “high” in
biodiversity.
Catch drain
A small channel constructed to intercept and divert runoff away from embankments,
disturbed areas, and stockpiles
Clay
A natural earthy material possessing plastic properties and consisting of particles finer
than 0.002 mm. Generally, it includes the most chemically active mineral part of a soil.
Many of the important physical and chemical properties of a soil depend on the type
and quantity of the clay portion.
Detention basin
(retention/retarding basin) – A storage pond, basin or tank used to reduce and
attenuate the peak discharge within a drainage system
Dispersible soils
Dispersible soils are structurally unstable in water and readily split into their constituent
fine particles resulting in turbid water that never seems to clear. They can stay in
suspension for very long periods, mainly because of negative electrical charges on their
surfaces that cause them to repel each other.
Diversion bank
An earth bank constructed across a slope for intercepting and diverting water. Typically
constructed at the upper edges of cut slopes to collect water from nearby properties
and divert it around the cut.
Due diligence
Due diligence is the only real defense to prosecution proceedings for environmental
mishaps. It is based on a systematic approach to setting environmental performance
standards.
Class Pre-Reader
EC AHCSAW302A PR Implement erosion and sediment control measures Version 1
91563NSW Certificate IV Environmental Management and Sustainability
© EcCell Greenskills Training Pty Ltd. 2013
Dated 28.08.12
Printed 02.03.13
3
Erosion
Detachment and movement of soil or rock fragments by water, wind, ice or gravity (i.e.
accelerated, geological, gully, natural, rill, sheet, splash, or impact, etc.)
Erosion and
Sediment Control
Plan
An Erosion and Sediment Control Plan is a component of a Soil and Water Management
Plan, but only addresses erosion and sediment control during a construction phase
where 250 to 2,500 square metres will be disturbed It does not address ongoing or
permanent control of pollutants (c.f. Soil and Water Management Plan).
Flocculent
A chemical agent used to enhance the flocculation process (c.f. flocculation)
Geofabric
filter fabric, geotextile) – (1) A synthetic fabric, woven or non woven, used for various
purposes including:
Soil pH
is a measure of the acidity or alkalinity of a soil. It relates to the concentration of the
hydrogen ions (H+) in the soil solution measured on a negative logarithmic scale of 1 to
14. The concentrations of hydrogen ions are equal to the hydroxyl ions (OH–) at pH 7,
greater below pH 7 (acid) and fewer above (alkaline).
Sediment basin
A basin or tank in which storm water containing settleable solids is retained to remove
by gravity or filtration a part of the suspended matter.
Sedimentation
Deposition of material of varying size, both mineral and organic, away from its site of
origin by the action of water, wind, gravity or ice.
Topsoil
The top layers of soil that supports vegetation. Tunnel erosion – The removal of subsoil
by water while the surface remains relatively intact; also called piping
There are four
basic principles in
managing
stormwater
(i) Make sure everyone working on the site understands how important it is to not
pollute stormwater (or sewer).
(ii) Do not disturb more of the site than you have to.
(iii) Install erosion and sediment controls before starting work.
(iv) Maintain your erosion and sediment control works throughout the
construction phase* (MUSSC).
Class Pre-Reader
EC AHCSAW302A PR Implement erosion and sediment control measures Version 1
91563NSW Certificate IV Environmental Management and Sustainability
© EcCell Greenskills Training Pty Ltd. 2013
Dated 28.08.12
Printed 02.03.13
4