!Dwgs_TCLF_Cell_5_Geosynthetis_IFP.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 an engineering drawing document for Greenville County, South Carolina, prepared by HDR Engineering Inc., detailing the geosynthetic materials and liner construction specifications for Unit 4, Cell 5 of the Twin Chimneys Landfill. The drawing specifies the procurement and installation requirements for a 5.0-acre proposed cell utilizing geosynthetic clay liner (GCL), 60-mil high-density polyethylene (HDPE) geomembrane, and geocomposite drainage media. The project includes detailed liner sections, leachate collection systems with perforated and solid HDPE pipes, monitoring well locations, and anchor trench configurations with specific slope ratios of 3:1. Materials are to be purchased and stored between October and November 2026, with the drawing noting that while storage by the proposer or manufacturer ensures material availability, it does not guarantee that the proposer will serve as the installer, as installation is subject to a separate solicitation.
The drawing specifications include detailed construction notes addressing clay sourcing from stockpiles, backfill requirements, HDPE liner panel layouts to be submitted for engineer approval, and textured 60-mil HDPE geomembrane requirements for all areas. All leachate pipes must be perforated with fused connections using appropriately sized fittings and butt fusion welds. The document mandates that clay liner certification be provided in writing to the Construction Quality Assurance (CQA) engineer prior to HDPE installation, with all permeability test locations recorded by GPS or conventional survey. The contractor must ensure proper pipe spacing of 4 inches for center holes with staggered perforations ranging from 3/8 to 1/2 inches depending on location, and all cleanouts must run perpendicular to slope. This solicitation is for material procurement and storage only, not construction installation, requiring vendors to be approved by the geosynthetic materials manufacturer.
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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
04/2026 PROPOSAL
GEOCOMPOSITE DRAINAGE MEDIA
HDPE GEOMEMBRANE
GEOSYNTHETIC CLAY LINER
2'
1'
1" = 1'
ANCHOR TRENCH2
24" INITIAL SOIL BARRIER
GEOSYNTHETIC CLAY LINER (GCL)
HDPE GEOMEMBRANE
GEOCOMPOSITE DRAINAGE MEDIA
24" OPERATIONAL LAYER
SUBGRADE
NOTES:
1. GCL AND GEOCOMPOSITE DRAINAGE NET ARE PRESENT
IN ALL LOCATIONS WHERE HDPE IS DETAILED.
2. THE REQUIRED THICKNESS OF LAYERS IS MEASURED
PERPENDICULAR TO THE SURFACE. THE HORIZONTAL
LOCATION OF THE SLOPE TOES WILL VARY BASED ON
INTERSECTING SLOPES.
3. GEOSYNTHETIC MATERIAL THICKNESS ARE
EXAGGERATED FOR ILLUSTRATION PURPOSES WHERE
SHOWN AND OMITTED FOR DETAIL CLARITY WHERE NOT
SHOWN.
RAINCOVER
RAINCOVER
CONSTRUCTION
BASELINE
WELDED CAP
1.00'
LINER AND RAINCOVER
ANCHOR TRENCH
LEACHATE
PIPE
2.00'
SLOPESLOPE
B
SEPARATOR
GEOTEXTILE
2' M
IN
RAINCOVER
PERFORATED PIPE
RAINCOVER
CONSTRUCTION
BASELINE
1.0'
LINER AND RAINCOVER
ANCHOR TRENCH
2.0'
2.0'
2.
0'
12'
12'
RAINCOVER
CONSTRUCTION
BASELINE
WELDED CAP TO BE
REMOVED AND NEW PIPE
WELDED TO EXISTING PIPE
6'
LINER AND RAINCOVER
ANCHOR TRENCH
LEACHATE
PIPE
2.00'
LEACHATE
PIPE
EXISTING
CELL 1 OR 2
SLOPE
SLOPE
2.0'
SEPARATOR
GEOTEXTILE
2' M
IN
RAINCOVER
4'
CONSTRUCTION
BASELINE
FLAP (60-mil)
PERFORATED PIPE
WELD FLAP TO
BASE LINER
6'
15.7'
RAINCOVER
CONSTRUCTION
BASELINE
6.0'
LINER AND RAINCOVER
ANCHOR TRENCH
2.0'
2.0'
2.
0'
EXISTING
CELL 1 OR 2
CELL 3
SEPARATOR GEOTEXTILE
(EXPOSED GEOTEXTILE TO BE
REMOVED BY THE OWNER
PRIOR TO WASTE PLACEMENT)
SEPARATOR GEOTEXTILE
(EXPOSED GEOTEXTILE TO BE
REMOVED BY THE OWNER
PRIOR TO WASTE PLACEMENT)
NOTES:
1. SEE DETAIL 3 FOR DIMENSIONS OF THE STONE COLUMN.
2. GEOSYNTHETIC MATERIAL THICKNESS ARE EXAGGERATED FOR ILLUSTRATION
PURPOSES WHERE SHOWN AND OMITTED FOR DETAIL CLARITY WHERE NOT SHOWN.
1" = 5'
LINER SECTION1
1" = 5'
LEACHATE COLUMN3
15C-05 1" = 5'
CELL 1 & 2 TIE-IN
WITH CELL 3 W/O PIPE4
15C-04 1" = 5'
CELL 1 & 2 TIE-IN
WITH CELL 3 W/O PIPE5
15C-02
LINER
SECTION
1" = 5'
CELL 3 FUTURE TIE IN W/PIPE6
15C-04
1" = 5'
CELL 1 & 2 TIE-IN
WITH CELL 3 W/PIPE7
15C-04
1" = 5'
TERMINATION8
15C-04
LINER
SECTION
1" = 5'
TEMPORARY STOMWATER PIPE10
15C-04
10'
3.
6'
1.
3'
3.0'
0.
7' 3.5'
10'
A B C QTY
8 12 10 12
1" = 5'
LEACHATE COLLECTION CLEANOUT9
15C-04
NOTE: ALL LEACHATE COLLECTION
HARDWARE TO BE STAINLESS STEEL
CAST IN PLACE
CONCRETE
PERIMETER CHANNEL
FRONT VIEW
SOLID HDPE PIPE "A"Ø
WASTE
SOLID HDPE CLEANOUT
PIPE "A"Ø
HDPE PROTECTIVE CASING "C"ØANCHOR BLOCK
"B"Ø PIPE
CONSTRUCTION BASELINE
PERFORATED HDPE PIPE "A"Ø
BLIND FLANGE
15" SMOOTH WALL
HDPE STORM DRAIN
PIPE @ 0.5% SLOPE
LINER SECTION
SPACING
4" CENTER
HOLE/PATTERN: 6/STAGGERED
3/8"Ø STAGGERED
PERFORATIONS
6" TO 14"
6" CENTER SPACING
1/2"Ø STAGGERED
PERFORATIONS
HOLE/PATTERN: 16/STAGGERED
16"- 36"
NOT TO SCALE
PIPE PERFORATION11
LINER DETAILS
15C-08.dwg
1"=60 15C-08
J.GAUL
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
FOR
INFORMATION
NOT FOR
CONSTRUCTION
04/2026 PROPOSAL
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