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Waste Water Treatment
One popular method of treating waste water involves storing
it in evaporation ponds or storage ponds. As with other lining
containment applications, the engineering objective is to eliminate
any seepage outside the ponds. Geomembrane liner has accomplished
this objective for the last 30 years.
We have the latest factory fabrication and field installation
technology to insure a first quality project. PVC has been
the dominant polymer in this market due to its ease of installation,
market performance and cost effectiveness.
Tank Linings
Geomembrane liner is an effective containment membrane used in tanks to hold a
wide variety of liquid - water, wastewater, treated sludge, fuels,
gasoline, etc.
We can manufacture drop-in tank linings for smaller projects to
eliminate any installation costs. We fabricate a wide variety of polymers
in order to be able to select the right material for your project.
Sewage Lagoons
Many municipalities or industrial facilities rely on aeration to treat,
reduce or eliminate sewage. This aeration will typically take place in a
single or a system of ponds.
Geomembrane liner provides the containment to protect the soil and
groundwater beneath these ponds. Polypropylene is an emerging material
used in this application due to its long term service life and excellent
physical properties.
A Geomembrane liner made from polypropylene provides the following advantages:
- Formulated to provide 20 year service life as an exposed membrane.
- Excellent tensile/tear strength properties provide strength required
in steep ponds of 3:1 slope angle or steeper.
- Easy to field seam and replace; No specialized equipment necessary.
- Not subject to environmental stress cracking as are some HDPE
linings.
- Excellent chemical resistance.
Secondary Containment
Impermeable plastic geomembrane liner has been used in many applications for
prevention of seepage, which results in pollution. They are now being used
under oil storage tanks and in diked oil storage areas.
Many states require that provisions be made for containment of oils and
hydrocarbons if the containing vessel should rupture. Plastic geomembrane liner
placed under above-ground tanks or lining diked storage areas provide this
safety feature.
We can design, fabricate and install a containment system
to provide containment if needed while exceeding regulatory requirements.
Whether your project involves fuel, gas or any other hydrocarbons. We
can choose the best material for your project as we work with
many different Polymeric materials.
Reservoirs
Potable water reservoirs are a crucial element in the treatment system of
many municipalities throughout the world. Many older reservoirs are built
with concrete or asphalt bottoms which have leaked significant volumes of
water costing millions of dollars.
We have provided a solution to this problem for over 30 years. No matter how small or large, easy or complex, we can
install a lining for your reservoir.
Golf Course Ponds
Geomembrane liners offer design versatility, easily adapting to the
contours and shapes of your ponds. They prevent water and fertilizer
run-off from seeping into the ground. Flexible materials install
easily and quickly. And, once installed, they're virtually maintenance-free.
When it's time to beautify an add challenge to your course,
the solution is often "just add water".
Aquaculture Ponds
Today's sophisticated fish farming procedures demand a more
manageable, controlled environment that can be achieved by
an unpredictable mud-bottom pond. As fish hatcheries respond
to the increased demand for edible fish, synthetic geomembrane liners
are being used for ponds to provide better control, increased production
and decreased maintenance. With the pond bottom not covered with soil, the
pond operator can control the chemical and biological condition
of the pond, and thus reduce chances of disease and other
imbalance in the aquaculture environment.
In addition, synthetic geomembrane liners reduce or eliminate
grass mowing on the side slopes of the pond, stabilize soil
moisture content caused by fluctuating water levels, and reduce
shrink/swell soil instability problems caused by too wet or
to dry soil.
Canals
PVC linings have been used in North America to contain water in transport
canals since the early 1950's. Initially 10 mil PVC was used for all of
the early projects but was later replaced by 20 mil PVC due to the cost
effectiveness of the material.
PVC is is the material of choice for this
application due to the following factors:
- PVC is provided in large factory fabricated panels to reduce field
seaming requirements.
- PVC is easy to weld in the field.
- PVC is easy to deploy in the field.
- PVC provides long term service life as a containment membrane.
- PVC is a very cost effective material in regards to overall material
cost - resin, sheet, fabricated panel and installation.
The U.S. Bureau of Reclamation (under the Department of the Interior)
and the Province of Alberta have successfully installed millions of square
feet of PVC in their canal systems.
Leakage loss of this water has been eliminated through the use of PVC
linings allowing water to be transported to population areas that do not
have adequate water sources of their own. If you live in these areas, PVC
has been a critical factor in your lifestyle.
Landfill Caps
Just as Federal and State Regulations detail every aspect of landfill
location, construction and operation, they now detail every aspect of its
closure design. A typical MSW landfill cap, from bottom up, consists of
gas-venting layer, a low-permeability barrier layer (soil, a geosynthetic
clay liner and/or a geomembrane), a barrier protection layer and a
vegetable soil layer.
Closure requirements are critical for the post closure life cycle of a
landfill as many landfills do not have synthetic membrane linings to
prevent the filtration of leachate into the groundwater. Consequently the
formation of leachate within a landfill cell must be prevented at all
cost.
PVC
is the primary material of choice for the following reasons:
- Provided in large factory fabricated panels to reduce field seaming
requirements and installation costs.
- Easy seamability-simple field tools required.
- Reliable, durable, fully homogenous factory and field seams.
- Excellent puncture and impact resistance to resist mechanical damage
during installation and earth covering operations.
- "Lay flat" contact subgrade (to promote a complete and
rapid diversion of surface rainwater) as opposed to
"buckling" effect caused in other geomembranes by their
thermal contraction/expansion characteristics.
- Excellent soil friction efficiency.
- Non yield elongation characteristics - PVC will not
"yield" or weaken until it reaches its breaking strength
which occurs at 300-450% ultimate elongation; some geomembrane
materials will yield under continued stress after an elongation of
only 10-12% is achieved.
- PVC is the most flexible of lining materials due to its amorphous
molecular structure.
A specifying engineer or project owner can be assured of the long-term
serviceability of PVC in this application as the product has
been in use for over thirty years as a containment membrane
in various types of lagoons, holding ponds and landfills themselves.
MSW Landfill Linings
Throughout history there has always been the need to dispose of the
waste generated by man. Raw sanitary and industrial sewage was emptied
into rivers and lakes. Solid wastes were either incinerated, buried or
deposited in the ocean. When the population of the earth was much smaller
than it is now, these methods provided the most efficient means of
disposal. They were also relatively safe in so far as public health was
concerned as nature was able to safely break down the disease carrying
bacteria and other organic materials and render them harmless. However, as
the population grew the lakes and rivers became so saturated with sewage
that nature was unable to keep purifying the waters and pollution of such
major proportions occurred, that it threatened public health. At the same
time sanitary landfills were being used without regard for water purity,
with the result that pollution found its way into our groundwater causing
many problems ranging across a wide spectrum.
One solution to prevent this pollution was to place a liner within the
landfill. Some of the materials used were clay, bentonite, asphalt and
plastic membrane liners. Since impermeable plastic membranes have been
used successfully for years in preventing seepage of water and various
waste liquids, it was only logical that these be considered for sanitary
landfill use. In addition, they have long life, are highly resistant to
leachate and have the proper mechanical properties to be successful in
this application.
We have supplied and installed containment linings for MSW Landfills
since the 1970's. Federal RCRA Regulations enacted in the mid 1980's has
dramatically increased the demand for landfill linings.
We have worked with various government authorities and industry associations
to adopt QA/QC procedures and specification guidelines. Both
PVC and Polypropylene have been used in this application successfully.
Decorative Ponds and Lakes
Decorative ponds and lakes enhance property appearance as well as
increase property values. Natural soils cannot always adequately contain
water and may leave a "murky" look in the pond. Our liners
provide the following features:
- Long term leak-free service life.
- Flexibility to form fit your pond or lake.
- Large fabricated panel capability to eliminate or reduce field
seaming requirements.
- Ease of repair if mechanically damaged.
- Leaves a "clean" appearance in pond or lake - no
"murkiness" from pond or lake bottom.
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