| EARTH-BANKED LINED LAGOONS USING GEOMEMBRANE LINING SYSTEM
The Lining
Jones McGirr & Co. Ltd. are the sole agents of Lining Services (Waterford) Ltd. (LSW) in Northern Ireland. Both Jones McGirr & Co. and LSW place a very high emphasis on quality. LSW was accredited with the ISO 9002 Quality Standard in 1997 and in 2002 were accredited with ISO 9001. LSW is the only lining contractor operating in Northern Ireland or the Republic of Ireland to successfully achieve ISO accreditation and the company works closely with Consulting Engineers and Civil Engineering Contractors to ensure that all projects are completed in the most efficient manner possible using only top quality products.
GSE HD
GSE HD is a high quality, high-density polyethylene (HDPE) geomembrane produced from a specially formulated, proprietary virgin polyethylene resin designed specifically for flexible geomembrane applications. GSD HD has outstanding chemical resistance, mechanical properties, environmental stress crack resistance, dimensional stability and thermal ageing characteristics. GSE HD also has excellent resistance to UV radiation and is suitable for exposed conditions.
GSE HD is available in standard roll width approximately 5.9m. Roll length is 200m for 1.0mm thickness and varies in inverse proportion to thickness. Roll weight is approximately 1.2 tonnes.
Chemical Resistance Chart
Listed below are test results reported by a supplier
of the high-density polyethylene resin used to manufacture
GSE liner. The high-density polyethylene is resistant to the
following chemicals (the table is necessarily selective but
a comprehensive list can be provided). The degree of chemical
attack on any material is influenced by a number of variable
factors and their interaction, including temperature, pressure,
size of area under attack, exposure duration and the like.
Where the liner will be exposed to a mixture of chemicals,
it is recommended that tests be performed for liner resistance
to that chemical mixture. Therefore, these ratings are offered
as a guide only. A more detailed list can also be provided.
Concentration
sat. sol. = Saturated aqueous solution, prepared at 20°C
(68°F) sol. = aqueous
dil. Sol. = diluted aqueous solution with concentration below
10%
cust. Conc. = customary service concentration
| (S)
Satisfactory: Liner material is resistant to the
given reagent at the given concentration and temperature.
No mechanical or chemical degradation is observed.
|
|
(L)
Limited Application Possible: Liner material may
reflect some attack. Factors such as concentration,
pressure and temperature directly affect liner
performance against the given media. Application,
however, is possible under less severe conditions,
e.g. lower concentration, secondary containment,
additional liner protections, etc.
|
| (U)
Unsatisfactory: Liner material is not resistant
to the given reagent at the given concentration
and temperature. Mechanical and/or chemical degradation
is observed. |
|
(-)
Not tested
|
|
Chemical Resistance Chart
|
MEDIUM |
CONCENTRATION |
RESISTANCE 20
DEGREES C (68 F) |
RESISTANCE 60
DEGREES C (140 F) |
|
AMMONIA LIQUID |
100% |
S |
S |
|
AMMONIUM NITRATE |
SOL |
S |
S |
|
HYDROCHLORIC ACID |
35% |
S |
S |
|
MILK |
N/A |
S |
S |
|
UREA |
SOL |
S |
S |
|
Agricultural Applications
Traditionally Farm Wastes have been mainly stored in unlined pits, concrete or steel tanks. There are inherent problems with each of these storage methods and now HDPE lined basins are being widely used to provide secure storage facilities at an economic cost. Lined lagoons can be formed to suit all site conditions, are quick to construct, easy to agitate and empty and can be extended or moved at a later date if required. Lagoons qualify for Department of Agriculture Grant Aid under the Farm Nutrient Management Scheme (FNMS). Our lined lagoons conform to Department of Agriculture specifications as outlined in their FNMS booklet 5A.
The Liners are installed on a panel-by-panel basis using a variety of seaming technology, which includes an extrusion, hot wedge & hot gas welding process. All formed joints are testable by destructive and non-destructive techniques to ensure that a 100% seal has been achieved. A wide range of standard construction refinements have been developed to overcome common challenges such as sealing to concrete structures and pipe penetration. Our lining systems have excellent physical, mechanical, biological and chemical resistance properties.
Other Typcial Applications Include: -
Landfill Capping, Landfill Cells, Leachate Lagoons, Curtain Walls, Industrial Sludge Basins, Stormwater Retention Ponds, Effluent Treatment, Bund Linings, Tank & Manhole Lining, Water Reservoirs, Channel & Canal Linings, Lake & Pond Linings, Aquaculture Applications
For example: -
Proper Stormwater management is now required on most large scale residential, industrial and pharmaceutical developments. Retention ponds are used to control the flow of surface water from large paved/roofed areas to rivers and streams. Retention ponds are also used to store contaminated water arising from fire fighting or accidental spillage of chemicals on site. It is critical that retention ponds are fully sealed to prevent seepage and are also sometimes used as settlement basins to remove suspended solids from water and effluent prior to discharge or treatment.
Reference Projects
Pfizer Pharmaceuticals - Co. Cork
Smithkline Beecham - Co. Cork
Hewlett Packard - Co. Kildare
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