Geosynthetics October/November 2022 - 21

and testing at a frequency of one sample/
test per 500 feet (152 m). The data/quality-based
field seam evaluation requirements
stated that:
* Destructive test samples shall not be
collected at a prescribed frequency.
¶ Destructive test samples will
be collected based on review of
geomembrane seam DAW reports
where temperature, speed and
pressure values were outside of
the defined tolerance.
¶ The CQA engineer/personnel may
elect to collect destructive test
samples based on visual observation
of seaming operations and/or
observed seam quality.
* The geosynthetics installer shall submit
geomembrane DAW reports to
CQA personnel at the end of each
working day or, at the latest, the
beginning of the next working day.
Taped geomembrane edges
AGRU America Inc. developed its Clean
Seam technology to support these projects.
The taped edge affixes a 6 inch (15.2
cm) wide tape to the smooth edge of the
geomembrane roll using a proprietary
process that leaves no residue on the liner
surface when removed. The roll is manufactured
with the tape on the top of the
sheet on one edge and on the bottom of
the sheet on the other edge (see Figure
2). When the rolls are deployed, the taped
edges align as adjacent panels are overlapped
or " shingled. " Just before the welding
machine seams the panels, the tape is
removed, revealing a clean geomembrane
surface free of dirt and moisture and
ready for welding (see Figure 3).
Project execution
For both sites, geomembrane installation
began each day with trial seams conducted
in the morning and after the lunch
break before beginning production seaming.
Installation personnel established and
set the target seaming temperature, speed
and pressure appropriate for the conditions
that day and set the specified parameter
tolerances in the welding machine. In
addition, the welding technician set the
data recording frequency according to the
project specifications.
Site 1
CCS was able to install all four layers
of geosynthetics on the project in two
days. CCS used Leister GEOSTAR G7
LQS double-track fusion wedge welding
machines to seam the geomembrane.
The Leister units were set to record a
data point every 4 inches (10.2 cm) and
if a defined tolerance was exceeded, the
machine recorded data on a 2-inch (5.1
cm) frequency until the readings returned
to the project-specified range.
FIGURE 2 AGRU HDPE geomembrane with
Clean Seam™
FIGURE 3 Site 1 installation (note taped edge in front of welder)
GeosyntheticsMagazine.com
21

http://www.GeosyntheticsMagazine.com

Geosynthetics October/November 2022

Table of Contents for the Digital Edition of Geosynthetics October/November 2022

Geosynthetics October/November 2022 - Cover1
Geosynthetics October/November 2022 - Cover2
Geosynthetics October/November 2022 - 1
Geosynthetics October/November 2022 - 2
Geosynthetics October/November 2022 - 3
Geosynthetics October/November 2022 - 4
Geosynthetics October/November 2022 - 5
Geosynthetics October/November 2022 - 6
Geosynthetics October/November 2022 - 7
Geosynthetics October/November 2022 - 8
Geosynthetics October/November 2022 - 9
Geosynthetics October/November 2022 - 10
Geosynthetics October/November 2022 - 11
Geosynthetics October/November 2022 - 12
Geosynthetics October/November 2022 - 13
Geosynthetics October/November 2022 - 14
Geosynthetics October/November 2022 - 15
Geosynthetics October/November 2022 - 16
Geosynthetics October/November 2022 - 17
Geosynthetics October/November 2022 - 18
Geosynthetics October/November 2022 - 19
Geosynthetics October/November 2022 - 20
Geosynthetics October/November 2022 - 21
Geosynthetics October/November 2022 - 22
Geosynthetics October/November 2022 - 23
Geosynthetics October/November 2022 - 24
Geosynthetics October/November 2022 - 25
Geosynthetics October/November 2022 - 26
Geosynthetics October/November 2022 - 27
Geosynthetics October/November 2022 - 28
Geosynthetics October/November 2022 - 29
Geosynthetics October/November 2022 - 30
Geosynthetics October/November 2022 - 31
Geosynthetics October/November 2022 - 32
Geosynthetics October/November 2022 - 33
Geosynthetics October/November 2022 - 34
Geosynthetics October/November 2022 - 35
Geosynthetics October/November 2022 - 36
Geosynthetics October/November 2022 - 37
Geosynthetics October/November 2022 - 38
Geosynthetics October/November 2022 - 39
Geosynthetics October/November 2022 - 40
Geosynthetics October/November 2022 - 41
Geosynthetics October/November 2022 - 42
Geosynthetics October/November 2022 - 43
Geosynthetics October/November 2022 - 44
Geosynthetics October/November 2022 - cover3
Geosynthetics October/November 2022 - cover4
Geosynthetics October/November 2022 - GeoConf Brochure 1
Geosynthetics October/November 2022 - GeoConf Brochure 2
Geosynthetics October/November 2022 - GeoConf Brochure 3
Geosynthetics October/November 2022 - GeoConf Brochure 4
Geosynthetics October/November 2022 - GeoConf Brochure 5
Geosynthetics October/November 2022 - GeoConf Brochure 6
Geosynthetics October/November 2022 - GeoConf Brochure 7
Geosynthetics October/November 2022 - GeoConf Brochure 8
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2024-january-2025
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-july-august-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-case-studies-guide-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-april-may-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-february-march-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2023-january-2024
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2023
https://www.nxtbook.com/ata/geosynthetics/geoysynthetics-august-september-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-june-july-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-april-may-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-february-march-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-december-2022-january-2023
https://www.nxtbook.com/ata/geosynthetics/geosynthetics-october-november-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-december-2021-january-2022
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-october-november-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-august-september-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-june-july-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-april-may-2021
https://www.nxtbook.com/ifai/geosynthetics/geosynthetics-february-march-2021
https://www.nxtbook.com/ifai/geosynthetics/1220GS
https://www.nxtbook.com/ifai/geosynthetics/1020GS
https://www.nxtbook.com/ifai/geosynthetics/0820GS
https://www.nxtbook.com/ifai/geosynthetics/0620GS
https://www.nxtbook.com/ifai/geosynthetics/0420GS
https://www.nxtbook.com/ifai/geosynthetics/0220GS
https://www.nxtbook.com/ifai/geosynthetics/1219GS
https://www.nxtbook.com/ifai/geosynthetics/1019GS
https://www.nxtbook.com/ifai/geosynthetics/0819GS
https://www.nxtbook.com/ifai/geosynthetics/0619GS
https://www.nxtbook.com/ifai/geosynthetics/0419GS
https://www.nxtbook.com/ifai/geosynthetics/0219GS
https://www.nxtbook.com/ifai/geosynthetics/1218GS
https://www.nxtbook.com/ifai/geosynthetics/1018GS
https://www.nxtbook.com/ifai/geosynthetics/0818GS
https://www.nxtbook.com/ifai/geosynthetics/0618GS
https://www.nxtbook.com/ifai/geosynthetics/0418GS
https://www.nxtbook.com/ifai/geosynthetics/0218GS
https://www.nxtbookmedia.com