!Dwgs_TCLF_Cell_5_Geosynthetis_IFP_(003).pdf
PDF 3 MB Posted
- Attached to
- UNIT 4 CELL 5 GEOSYNTHETIC MATERIALS
- Solicitation number
- RFP #26108
- Issued by
- Greenville County, South Carolina
About this file
This is a technical drawing document for Greenville County, South Carolina's Twin Chimneys Landfill Unit 4 Cell 5 liner system, prepared by HDR Engineering Inc. The drawing illustrates the geosynthetic materials layout and specifications for the landfill base liner construction, including the placement of geosynthetic clay liner (GCL), 60-mil HDPE geomembrane, and geocomposite drainage media across the proposed 5.0-acre Cell 5. The document specifies construction requirements for clay soil liner installation from stockpiled materials, HDPE liner panel layouts with seaming parallel to maximum slope, leachate collection pipe systems with perforations and fusion welds, and locations for monitoring wells, piezometers, and methane monitoring stations. Multiple notes detail surveying requirements for as-built documentation, permeability testing procedures, CQA certification requirements prior to HDPE installation, and construction baseline specifications. The drawing references related details in sheets 15C-08 and 15C-09 and indicates a delivery timeline of October-November 2026.
The related procurement solicitation seeks geosynthetic materials consisting of GCL, 60-mil HDPE geomembrane, and geocomposite drainage media for this project. The vendor must procure and store these materials to ensure production and delivery to the landfill by October-November 2026. The solicitation specifies that materials must be purchased by a geosynthetics installer approved by the materials manufacturer, though the manufacturer may also serve as the storage provider. Critically, material storage does not guarantee the proposer will be awarded the separate contract for material installation, which will be competitively solicited independently. This procurement is strictly for material supply and storage, not construction services.
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Text version
LF@1.1%
LF@2.5%
LF@2.5%
LF@2.0%
LF@2.5%
LF@2.0%
740740740
ACTIVE
CELL 2
8.6 ACRES
ACTIVE
CELL 4
10.3 ACRES
PROPOSED
CELL 5
ACRES
5.0
5.0%
2.9%
4.4
5.0%
5.0% 4.0%
4.0%
3:1
3:1
3:1 3:1
MW-27
MW-62
MW-24
MW-63
OW-103
MW-18
MW-19
MW-20
PZ-6d
PZ-53
PZ-54
PZ-56
PZ-6s
PZ-77
PZ-23s
PZ-78
PZ-25
PZ-25d
MW-21
MW-23
MW-22
MW-25
UNIT 4 CELL 4 TOP OF LINER
15C-04.dwg
1"=60 15C-04
J.GAUL
2' OPERATIONAL COVER
SUBGRADE
2' SOIL LINER
KEY MAP
NTS
GEOSYNTHETIC CLAY LINER
(WITHIN CBL)
LOCATION THIS SHEET
60 MIL HDPE GEOMEMBRANE
GEOCOMPOSITE DRAINAGE MEDIA
RAINCOVER
LEGEND
UNIT AND CELL BASELINES
PROPOSED MAJOR CONTOURS
PROPOSED MINOR CONTOURS
1. CLAY FOR THE SOIL LINER SHALL BE OBTAINED
FROM THE CLAY STOCKPILE .
2. BACKFILL THE ANCHOR TRENCH WITH THE SAME
MATERIAL AS USED FOR SOIL LINER
COMPONENT.
3. THE CONSTRUCTION BASELINE GENERALLY
REPRESENTS THE HORIZONTAL EXTENT OF THE
LINER SYSTEM. SEE LINER DETAILS.
4. THESE CONTOURS REPRESENT THE TOP OF
SOIL LINER GRADES.
5. REFER TO SPECIFICATIONS AND CQA PLAN FOR
SURVEYING REQUIREMENTS TO PRODUCE
AS-BUILT DRAWINGS AND TO PROVIDE BASIS
FOR VERIFYING EXCAVATION QUANTITIES AND
REQUIRED LINER THICKNESS.
6. RECORD ALL PERMEABILITY TEST LOCATIONS BY
GPS, OR CONVENTIONAL SURVEY. DOCUMENT
LOCATION OF ALL OTHER TESTS BY METHOD
APPROVED BY CQA CONSULTANT.
7. CERTIFY IN WRITING TO THE CQA ENGINEER
THAT THE CLAY LINER MEETS SPECIFICATIONS
INCLUDING THICKNESS VERIFICATION PRIOR TO
INSTALLING HDPE LINER.
8. SUBMIT A HDPE LINER PANEL LAYOUT TO THE
ENGINEER FOR APPROVAL PRIOR TO
INSTALLATION. THE PANELS SHALL BE SEAMED
PARALLEL TO LINE OF MAXIMUM SLOPE. FLOOR
PANELS SHALL GENERALLY BE LAPPED ON THE
DOWNHILL SIDE. REFER TO SPECIFICATIONS AND
CQA PLAN.
9. USE TEXTURED 60 MIL HDPE GEOMEMBRANE
FOR ALL AREAS.
10. ALL LEACHATE PIPES TO BE PERFORATED. ALL
CONNECTIONS TO BE FUSED.
11. JOIN INTERSECTING PIPES WITH
APPROPRIATELY SIZED FITTINGS AND BUTT
FUSION WELDS.
12. PIPES SHOULD BE LAID STRAIGHT BETWEEN
CONTROL POINTS. ALL CLEANOUTS SHALL RUN
PERPENDICULAR TO SLOPE.
NOTES
SEDIMENT BASIN #12
EXISTING STORMWATER
PIPE TO REMAIN
PROPOSED
CONSTRUCTION
BASELINE
A15C-09
C
C -0
METHANE MONITORING (MM)
PIEZOMETER (PZ)
MONITORING AND OBSERVATION
WELL (MW,OW)
PROPOSED EXISTING ABANDONED
MW-P
MM-P
PZ-# PZ-#
MM-#
MW-A
CELL 4 TIE-IN WITH
CELL 3 W/ PIPE
15C-08
LEACHATE PIPE3
15C-08
LEACHATE COLLECTION PIPE
(SIZE VARIES)
EXISTING MAJOR CONTOURS780
EXISTING MINOR CONTOURS
PIPE PERFORATION
(TYP)
15C-08
A
B
C
2 3 4 5 6 7 8
D
ISSUE DESCRIPTION
PROJECT MANAGER
PROJECT NUMBER
0 1" 2" FILENAME
SCALE
SHEET
DATE
UNIT 4 CELL 5 LINER
Greenville County South Carolina10174879
P. WESTMORELAND, P.E.
0 ISSUED FOR
HDR Engineering Inc.
440 S. Church St. Suite 1200 Charlotte, NC 28202-2075 704.338.6700 of the Carolinas
PROJECT ENGINEER
DRAWN BY
B 15C-09
CELL 4 TIE-IN WITH
CELL 3 W/O PIPE
15C-08
LEACHATE
CLEANOUT
15C-08
SLOPE DRAIN
CONNECT TO EXISTING
SLOPE DRAIN
TEMPORARY
STORMWATER PIPE
15C-08
FOR
INFORMATION
NOT FOR
CONSTRUCTION
8.6
PWESTMOR
Text Box 04/2026
PWESTMOR
Text Box
PROPOSAL
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