Clean liner sheets of dust, dirt, and other foreign matter. Carefully
clean area (both mating surfaces) of seams. [Remove surface [bloom] or
[cure] with solvent recommended by manufacturer.]
3.3
FILTER FABRIC INSTALLATION
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NOTE: Use bracketed sentence when fill is placed
between filter fabric and plastic or rubber liner.
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Place synthetic fiber filter fabric on prepared subgrade. Repair damaged
fabric by placing an additional layer of fabric to cover the damaged area a
minimum of 0.91 mm three feet overlap in all directions. Overlap fabric at
joints a minimum of 0.91 mm three feet. [Obtain approval of filter fabric
installation before placing fill. Place fill on fabric in the direction of
overlaps and compact as specified in Section 02300 EXCAVATION.] Follow
manufacturer's recommended installation procedures.
3.4
LINER INSTALLATION
3.4.1
Placement
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NOTE: Additional wording may be needed when surface
below liner could cause damage or areas where wind
conditions or pond geometry will cause obvious
problems during placement. Time in bracketed clause
can be varied depending upon climatic conditions.
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Position liner on previously prepared surface [or filter fabric] as
indicated. Unroll or unfold carefully. Avoid stretching. Allow liner to
lie in a relaxed state [for a minimum of 1/2 hour] prior to seaming.
3.4.2
Seams and Laps
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NOTE: During design, consider configurations that
will require as few seams as possible, with no seams
located in areas of maximum stress. Certain types
of liners, particularly cured rubber sheeting, may
require sealing edges of supported liners with
seaming adhesive and liner. Sealing edges of
supported liners with seaming adhesive is required
where scrim is exposed. Include additional safety
requirements appropriate for individual types of
seaming adhesive specified.
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Provide personnel handling or applying seaming adhesive with protective
clothing and other appropriate safety equipment. Apply seaming adhesive
and make field seam. Make lap or seam [_____] [150 mm] [6 inches]wide.
Seal lap or seam using rollers or hand pressure removing any wrinkles at
that time. A plank or board may be used for back-up during sealing but
remove prior to completion of installation. [For supported liners apply
splicing cement to cut edges of liner and seal with a strip of unsupported
liner of same material as liner.] [For supported liners apply splicing
SECTION 02661
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