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Cell 2 Composite Liner DesignCertification
SWEPCO – John W. Turk, Jr. Power PlantClass 3N Landfill
Permit No. 0311-S3N-R1AFIN: 29-00506
July 16, 2018Project No. 35177127
Prepared for:Southwestern Electric Power Company
502 North Allen AvenueShreveport, Louisiana 71101
Prepared by:Terracon Consultants, Inc.25809 Interstate 30 South
Bryant, Arkansas 72022(501) 847-9292
i
Table of Contents
1.0 OBJECTIVE ................................................................................................................................... 1
2.0 BACKGROUND INFORMATION ....................................................................................................... 12.1 FACILITY LOCATION DESCRIPTION ..................................................................................................... 12.2 CELL 2 DESIGN CRITERIA FOR NEW CCR LATERAL EXPANSION (§ 257.70) ........................................... 1
2.2.1 Composite Liner System Requirements (§ 257.70 (b) (1-4) .................................................... 12.2.2 Leachate Collection and Removal System (§ 257.70 (d) (1-3) ................................................ 2
3.0 SUMMARY AND PE CERTIFICATION .............................................................................................. 23.1 SUMMARY ....................................................................................................................................... 23.2 LIMITATIONS .................................................................................................................................... 23.3 PE CERTIFICATION .......................................................................................................................... 3
BIBLIOGRAPHY ..................................................................................................................................... 3
Figures1. Site Location Map2. Plant and CCR Unit Location Map3. Site Layout Map4. Typical Details 15. Typical Details 2
Cell 2 – Composite Liner Design CertificationJohn W Turk, Jr ■ Class 3N LandfillProject No. 35177127 ■ July 2018
1.0 Objective
The purpose of this Liner and Leachate Design Certification Report is to evaluate compliancewith the requirements of 257.70 for the liner and leachate collection design at the SWEPCO –John W. Turk, Jr Power Plant Class 3N Landfill (Permit No. 0311-S3N-R1) facility.Southwestern Electric Power Company (SWEPCO) is a unit of American Electric Power (AEP).
2.0 Background Information
2.1 Facility Location Description
Southwestern Electric Power Company owns and operates a coal-fired power plant (John W.Turk, Jr. Power Plant) with a Class 3 Non-Commercial (3N) solid waste facility (Class 3NLandfill) associated with the Power Plant. The site is located approximately 2.2 miles north ofFulton (Hempstead County), Arkansas. The Power Plant produces up to 600 Megawatts (MW)of electrical power utilizing western subbituminous coal. The Class 3N Landfill is used fordisposal of fly ash, bottom ash, and other byproducts from the coal-fired Power Plant. Thewaste materials are non-hazardous and non-putrescible. (FIGURE 1 & 2)
2.2 Cell 2 Design Criteria for New CCR Lateral Expansion (§ 257.70)
The Turk Class 3N Landfill consists of 5 cells (FIGURE 3). All 5 Cells consist of a compositeliner system and leachate collection and removal system (FIGURE 4 & 5). As per § 257.70(a)&(d), all new CCR landfills and any lateral expansions must be designed, constructed,operated, and maintained with a composite liner system and a leachate collection and removalsystem.
2.2.1 Composite Liner System Requirements (§ 257.70 (b) (1-4)
The Cell 2 composite liner system consists of a 60 mil HDPE geomembrane that is installedabove a 2-foot clay liner system that has a hydraulic conductivity of no more than 1 x 10– 7
cm/sec. The liner system will be constructed past the limits of waste placement so that thesurrounding earth will not be likely to be in contact with CCR or leachate (2011 PermitApplication, Volume 3, Appendix B Design Drawings, Terracon Consultants Inc.,February 2011)1. The HDPE geomembrane protects the clay liner from being in contact withthe waste. The composite liner system was modeled for slope stability in the previouslymentioned Volume 3, Appendix E Landfill Stability Calculations1. The liner system was alsomodeled for settlement in Volume 3, Appendix D Landfill Settlement Calculations. The linersystem design complies with the requirements of 257.70(b) and this information can be found inthe 2011 Permit Application, Volume 3, Appendix B Design Drawings, Appendix D LandfillSettlement Calculations, and Appendix E Landfill Stability Calculations.
Cell 2 – Composite Liner Design CertificationJohn W Turk, Jr ■ Class 3N LandfillProject No. 35177127 ■ July 2018
2
2.2.2 Leachate Collection and Removal System (§ 257.70 (d) (1-3)
The Cell 2 leachate collection and removal system consists of a double sided geocompositeabove the 60-mil HPDE liner. On-site soil will be used for protective cover. Chimney drains willbe installed into the protective cover to allow the leachate access to the double-sidedgeocomposite. The collection piping will also be made from HDPE material. The collectionsystem was designed according to § 257.70 (d) (1-3) and this information can be found in the2011 Permit Application, Volume 3, Appendix B Design Drawings, Appendix F LeachateGeneration Study, Appendix G Leachate Collection Piping Components Calculation, andAppendix H Leachate Collection Pond Capacity Calculations and the 2015 MinorModification Application, Attachment C Help Model Comparison, Attachment D RevisedPermit Drawings, and Attachment E Slope Stability Analysis Report2.
3.0 Summary and PE Certification
3.1 Summary
Southwestern Electric Power Company owns and operates a coal-fired power plant (John W.Turk, Jr. Power Plant) with a Class 3 Non-Commercial (3N) solid waste facility (Class 3NLandfill) associated with the Power Plant. The facility consists of a permitted approximately 73-acre disposal area. The facility meets the requirements of 40 CFR 257.70 Design Criteria fornew CCR Landfills and any lateral expansion of a CCR landfill.
3.2 Limitations
The findings and conclusions resulting from this investigation are based upon informationderived from the on-site activities and other services performed under the scope of work asdescribed in this report; such information is subject to change over time if additional informationis obtained. Please note that Terracon does not warrant the work of laboratories, regulatoryagencies or other third parties supplying information used in the preparation of the report.
12/31/2019
PROPERTY
BOUNDARY
CCR UNIT
LOCATION
1
1000090008000
1
6000
1000
0
5000 7000
2000
2
4000
0
0
3000
.5
1000
1
1000
0 2000
.5
1000
1
KILOMETERS
METERS
MILES
SCALE 1:24 000
NATIONAL GEODETIC VERTICAL DATUM OF 1929
7.5 MINUTE SERIES (TOPOGRAPHIC)Project Mngr:
Approved By:
Checked By:
Drawn By:
Project No.
Scale:
Date:
File No.Consulting Engineers and Scientists
FIG. No.
25809 I-30 SOUTH BRYANT, AR 72022FAX. (501) 847-9210PH. (501) 847-9292
CONTOUR INTERVAL FEET
N
FULTON / MCNABQUADRANGLES
1951 - Revised 1970 & 1975
10
DCM
TLB
TLB
DCM
216-002-35177127
AS SHOWN
501
07/02/2018
SITE LOCATION MAP
1CELL 2 COMPOSITE LINER DESIGN CERTIFICATION
AMERICAN ELECTRIC POWERJOHN W. TURK, JR. POWER PLANT
FULTON ARKANSAS
PROPERTY
BOUNDARY
EX
IS
TIN
G
CE
LL 1
CCR UNIT
LOCATION
FUTURE
CELLS
CE
LL 2
DESI
GNED
BY:
SCAL
E:AP
PVD.
BY:
DRAW
N BY
:
DATE
:
SHEE
T NO
.:
JOB
NO.
OF
BYDE
SCRI
PTIO
NDA
TERE
V.
ACAD
NO.
2580
9 I-3
0 SOU
THBR
YANT
, AR
7202
2FA
X. (5
01) 8
47-9
210
PH. (
501)
847-
9292
Consulting E
ngineers and S
cientists
CELL
2 CO
MPOS
ITE
LINER
DET
AIL C
ERTI
FICA
TION
AMER
ICAN
ELE
CTRI
C PO
WER
PLAN
T &
CCR
UNIT
LOCA
TION
MAP
FULT
ONAR
KANS
AS2
5
DCM
TLB
DCM
SEE
BARS
CALE
07/02
/2018
216-
002-
3517
7127
502
FIGU
RE 2
JOHN
W. T
URK,
JR. P
OWER
PLA
NT
N
0
SCALE IN FEET
375 750 1500
NOTE:
FUTURE CELLS ARE NOT PART
OF THE CURRENT CCR UNIT.
CCR UNIT
LOCATION
MAKE-UP WATER
POND
WA
ST
E W
AT
ER
PO
ND
LEACHATE
COLLECTION POND
CELL 1
(ACTIVE)
CELL 2
(UNDER
CONSTRUCTION)
FUTURE CELLS
LEGEND:
EXISTING CELL BOUNDARY
CCR UNIT BOUNDARY
PROPERTY BOUNDARY
DESI
GNED
BY:
SCAL
E:AP
PVD.
BY:
DRAW
N BY
:
DATE
:
SHEE
T NO
.:
JOB
NO.
OF
BYDE
SCRI
PTIO
NDA
TERE
V.
ACAD
NO.
2580
9 I-3
0 SOU
THBR
YANT
, AR
7202
2FA
X. (5
01) 8
47-9
210
PH. (
501)
847-
9292
Consulting E
ngineers and S
cientists
CELL
2 CO
MPOS
ITE
LINER
DES
IGN
CERT
IFIC
ATIO
N
AMER
ICAN
ELE
CTRI
C PO
WER
SITE
LAYO
UT M
AP
FULT
ONAR
KANS
AS3
5
TLB
TLB
DCM
SEE
BARS
CALE
07/02
/2018
216-
002-
3517
7127
503
FIGU
RE 3
JOHN
W. T
URK,
JR. P
OWER
PLA
NT
N
0
SCALE IN FEET
100 200 400
NOTE:
1. FUTURE CELLS ARE NOT PART OF THE CURRENT CCR UNIT.
FUTURE CELL BOUNDARY
LCS TRENCH & CHIMNEY DRAINS
1.0%
DESI
GNED
BY:
SCAL
E:AP
PVD.
BY:
DRAW
N BY
:
DATE
:
SHEE
T NO
.:
JOB
NO.
OF
BYDE
SCRI
PTIO
NDA
TERE
V.
ACAD
NO.
2580
9 I-3
0 SOU
THBR
YANT
, AR
7202
2FA
X. (5
01) 8
47-9
210
PH. (
501)
847-
9292
Consulting E
ngineers and S
cientists
CELL
2 CO
MPOS
ITE
LINER
DES
IGN
CERT
IFIC
ATIO
N
AMER
ICAN
ELE
CTRI
C PO
WER
TYPI
CAL D
ETAI
LS 1
FULT
ONAR
KANS
AS4
5
DCM
TLB
DCM
N.T.
S.07
/02/20
1821
6-00
2-35
1771
2750
4
FIGU
RE 4
JOHN
W. T
URK,
JR. P
OWER
PLA
NT
120°
3/8" DIAPERFORATIONS
4" HDPE SDR 11PIPE
NOTE:
PERFORATIONS BUILT TO
MANUFACTURER STANDARD.
12" HDPE SDR 11PIPE
60°
3"±
6"±
3"±
3/8" DIAPERFORATIONS
DESI
GNED
BY:
SCAL
E:AP
PVD.
BY:
DRAW
N BY
:
DATE
:
SHEE
T NO
.:
JOB
NO.
OF
BYDE
SCRI
PTIO
NDA
TERE
V.
ACAD
NO.
2580
9 I-3
0 SOU
THBR
YANT
, AR
7202
2FA
X. (5
01) 8
47-9
210
PH. (
501)
847-
9292
Consulting E
ngineers and S
cientists
CELL
2 CO
MPOS
ITE
LINER
DES
IGN
CERT
IFIC
ATIO
N
AMER
ICAN
ELE
CTRI
C PO
WER
TYPI
CAL D
ETAI
LS 2
FULT
ONAR
KANS
AS5
5
DCM
TLB
DCM
N.T.
S.07
/02/20
1821
6-00
2-35
1771
2750
4
FIGU
RE 5
JOHN
W. T
URK,
JR. P
OWER
PLA
NT
