ARSC covers materials you can’t walk on
– if you want to cover materials that are not load-bearing (such as
biosolids, sewage sludge, grain, industrial organic wastes, manure) an Air-beam
Roller Stockpile Cover is the answer – you simply roll it out across
the stockpile. You can walk on the ARSC even when it would be
impossible to walk on the stockpile it is covering.
ARSC stockpiles do not re-wet,
which means they do not slump or spread. In the case of soil
improvers for land application, they are as good (or better) when they
come out of an ARSC stockpile as when they went in. The
geotextile lets water vapour out, which means the surface dries.
ARSC stockpiles do not smell –
the geotextile contains all odours. There might still be odour
when a stockpile is spread, but at least that is transient and can be
managed by rapid incorporation.
ARSC was rolled back
this stockpile was dry and odour-free and the underside of the ARSC was
ARSC improves legal compliance
– UK law requires that a stockpile is
“secure in relation to waste kept in it” and this is achieved “if all
reasonable precautions are taken to ensure that the waste cannot escape
from it and members of the public are unable to gain access to the
waste”. Other countries have similar requirements: some even
stipulate covering. If a person or animal got into an open stockpile,
or if it were to move or cause pollution by run-off, it would be
difficult to argue in defence that the stockpile had been secure.
ARSC reduces haulage costs - if
the risk of movement or odour currently
restricts the siting of stockpiles to shallow gradients, remote from
neighbours, ARSC will give you greater freedom of choosing sites and
hence access to more land.
ARSC withstands strong winds –
it has an integral system of ccontinuous ground
anchoring that stops the wind getting underneath and moving it.
This ground anchoring also stops rainwater running off the ARSC and
back under the cover.
Gale force gusty wind peaking at force 8-9 (40 knots, 48 mph, 74 km/h)
and rain had no effect on this ARSC and its stockpile
ARSC is portable and reusable -
it can be used in field situations or
configured for a fixed facility. The materials themselves have a
normal life of at least 5 years outdoors with exposure to sunlight.
ARSC is not expensive – the
price of an ARSC depends on its size and
the quantity ordered, e.g. 10 or more would enable less expensive
fabrication. For example an ARSC to cover a stockpile 25 m x 25 m
would add less than £1 / m3 for 5 uses of the cover. By 15 uses
this comes down to about £0.50 / m3. This includes the initial
cost and the labour and equipment for deploying and recovering the
ARSC. On the same basis the cost for straw bale containment is
approximately £1.75 / m3 every time, and it is much less effective. The cost of ARSC is easily offset, by
savings in haulage and spreading, stockpile deterioration, alternative
forms of containment and legal fees depending on circumstances.