5103_JohnstonLF_FAcost_20211130

SMITH GARDNER
ABBRESS TEL WEB
14 N. Boylan Avenue, Raleigh NC 27603 919.828.0577 www.smithgardnerinc.com
August 13, 2021
Mr. J. Chad McLamb, Finance Officer
Johnston County Government
P.O. Box 1049
Smithfield, NC 27577
RE: Johnston County Landfill Facility (NC Permit No. 51-03)
Closure, Post -Closure, and Assessment/Corrective Action Cost Documentation
Dear Mr. McLamb:
This letter documents estimated closure, post -closure, and assessment/corrective action
costs for both municipal solid waste (MSW) and construction and demolition debris (C&D)
landfill units of the Johnston County Landfill facility as of June 30, 2021. All of these units
are combined under State Solid Waste Permit 51-03. The Phases 1-4 MSW units ceased
receiving waste on December 31, 1997 and closure is complete. Closure of the Area 1 C&D
landfill unit has also been completed. The Phase 4A and Phase 5 MSW landfill units and
Area 2 C&D unit are currently near capacity. The Phase 4A MSW landfill unit is currently
active. Construction of the Phase 6A MSW unit is nearly complete and this unit will be active
upon issuance of a permit to operate from the NC DEQ.
The projected costs for the facility are based on the estimates provided by Smith Gardner,
Inc. dated February 2019 which were part of the approved permit to construct application for
the Phase 6 MSW landfill unit. The following are the estimated closure, post -closure, and
assessment/corrective action costs for all landfill units of the Johnston County Landfill
facility as of June 30, 2021:
MSW Phase 4A - Closure Cost: $ 4,111,242
MSW Phases 5 and 6A - Closure Cost: $ 4,392,671
C&D Area 2 - Closure Cost: $ 2,208,900
MSW Phases 1-6 & C&D Areas 1-2 - Post -Closure Cost (30 Year): $ 4,790,247
Potential Assessment and Corrective Action Cost: $ 2,000,000
Total (2019$): $17,503,060
Inflation Factor 120201 * 1.017
Inflation Factor 120211 * 1.012
Total: $18,014,219
*Inflation factors per NC DEQ Division of Waste Management for 2020 and 2027 are added to adjust cost
estimates prepared in 2019.
Please find attached a detailed breakdown of closure, post -closure, and assessment and
corrective action costs.

Mr. J. Chad McLamb
August 13, 2021
Page 2of2
Please contact me at your earliest convenience if you have any questions or comments on
this matter.
Sincerely,
SMITH GARDNER, INC.
DOCUSigneed'+by:
5B6631996A674D7...
Pieter K. Scheer, P.E.
Vice President, Senior Engineer _g�p9� °N WhO� v�`�8/13/2021
DieterCdsmithaardnerinc.com
Attachment
CC: Rick Proctor, Johnston County

DocuSign Envelope ID: 6C4460A9-4162-490A-AB87-34B368159E9E
SMITH GARDNER
SHEET: 1/6
JOB #: JOHNSTON-16-4
DATE: 2/27/19
Johnston County Landfill- Financial Assurance
BY: PKS
Table 1: Summary
Item No.
Description
Total
1.0
MSW Landfill - Phase 4A - Estimated Closure Cost (See Table 21
$4,111,242
2.0
MSW Landfill - Phases 5 & 6 - Estimated Closure Cost (See Table 31
$5,441,876
3.0
C&D Landfill - Area 2 - Estimated Closure Cost (See Table 4)
$2,208,900
4.0
MSW Phases 1-5 - C&D Areas 1 & 2 - Estimated Post -Closure Cost (See Table 5)
$4,790,247
5.0
Potential Assessment & Corrective Action Cost (See Table 6)
$2,000,000
TOTAL =
$18,552,266
Notes:
1. All cost projections are presented in 2019 dollars. Appropriate annual escalators should be applied.
*Only Phase 5 and Phase 6A are constructed as of June 30, 2021.
SMITH GARNER, INC. Table 1 - Summary JC LF COST ESTIMATES 2019-02

DocuSign Envelope ID: 6C446OA9-4162-49OA-AB87-34B368159E9E
SMITH GARDNER
SHEET: 2/6
JOB #: JOHNSTON-16-4
DATE: 2/27/19
Johnston County Landfill- Financial Assurance
BY: PKS
Table 2: MSW Landfill - Phase 4A - Estimated Closure Cost
Item No.
Description
Estimated
Quantity
Units
Unit Cost
Item Cost
1.0
Site Preparation
29.4
AC
$10,000
$294,000
2.0
Landfill Gas Wells/Vents
29.4
AC
$10,000
$294,000
3.0
40-mil Textured LLDPE Geomembrane
1,281,000
SF
$0.50
$640,500
4.0
Drainage Geocomposite
1,281,000
SF
$0.65
$832,650
5.0
Vegetative Soil Layer (24"1
95,000
CY
$6.00
$570,000
6.0
Erosion Control (Diversion Berms, Down Pipes,
Etc.)
29.4
AC
$20,000
$588,000
7.0
Revegetation
29.4
AC
$2,000
$58,800
8.0
Surveying
29.4
AC
$2,000
$58,800
Subtotal (Items 1 - 81 =
$3,336,750
9.0
Bonds, Mobilization, & Insurance
4% of Subtotal (Items 1 - 81 =
$133,470
Subtotal (Items 1 - 91 =
$3,470,220
Contingency /10%J=
$347,022
Construction Subtotal =
$3,817,242
10.0
Engineering
29.4
AC
$3,000.00
$88,200
11.0
CQA
29.4
AC
$7,000.00
$205,800
TOTAL =
$4,111,242
Notes:
1. All cost projections are presented in 2019 dollars. Appropriate annual escalators should be applied.
2. Unit costs include materials and anticipated labor/installation costs.
SMITH GARNER, INC. Table 2 - MSWLF Ph 4A Closure JC LF COST ESTIMATES 2019-02

DocuSign Envelope ID: 6C4460A9-4162-490A-AB87-34B368159E9E
SMITH GARDNER
SHEET: 3/6
JOB #: JOHNSTON-16-4
DATE: 2/27/19
Johnston County Landfill- Financial Assurance
BY: PKS
Table 3: MSW Landfill - Phases 5 E 6 - Estimated Closure Cost
Item No.
Description
Estimated
Quantity
Units
Unit Cost
Item Cost
1.0
Site Preparation
38.9
AC
$10,000
$389,000
2.0
Landfill Gas Wells/Vents
38.9
AC
$10,000
$389,000
3.0
40-mil Textured LLDPE Geomembrane
1,695,000
SF
$0.50
$847,500
4.0
Drainage Geocomposite
1,695,000
SF
$0.65
$1,101,750
5.0
Vegetative Soil Layer (24"1
126,000
CY
$6.00
$756,000
6.0
Erosion Control (Diversion Berms, Down Pipes,
Etc.)
38.9
AC
$20,000
$778,000
7.0
Revegetation
38.9
AC
$2,000
$77,800
8.0
Surveying
38.9
AC
$2,000
$77,800
Subtotal (Items 1 - 81 =
$4,416,850
9.0
Bonds, Mobilization, & Insurance
4% of Subtotal (Items 1 - 81 =
$176,674
Subtotal (Items 1 - 91 =
$4,593,524
Contingency /10%J=
$459,352
Construction Subtotal =
$5,052,876
10.0
Engineering
38.9
AC
$3,000.00
$116,700
11.0
CQA
38.9
AC
$7,000.00
$272,300
TOTAL =
$5,441,876
Notes:
1. All cost projections are presented in 2019 dollars. Appropriate annual escalators should be applied.
2. Unit costs include materials and anticipated labor/installation costs.
*Only Phase 5 (19.2 acres) and Phase 6A (12.2 acres) are constructed as of June 30, 2021.
Thus, the Closure Cost (as of June 30, 2021) is: 31.4/38.9 x $5,441,876 = $4,392,671.
SMITH GARNER, INC. Table 3 - MSWLF Ph 5-6 Closure JC LF COST ESTIMATES 2019-02

DocuSign Envelope ID: 6C446OA9-4162-49OA-AB87-34B368159E9E
SMITH GARDNER
SHEET: 4/6
JOB #: JOHNSTON-16-4
DATE: 2/27/19
Johnston County Landfill- Financial Assurance
BY: PKS
Table 4: COD Landfill - Area 2 - Estimated Closure Cost
Item No.
Description
Estimated
Quantity
Units
Unit Cost
Item Cost
1.0
Site Preparation
15.8
AC
$10,000
$158,000
2.0
Landfill Gas Wells/Vents
15.8
AC
$10,000
$158,000
3.0
40-mil Textured LLDPE Geomembrane
688,300
SF
$0.50
$344,150
4.0
Drainage Geocomposite
688,300
SF
$0.65
$447,395
5.0
Vegetative Soil Layer (24"1
51,000
CY
$6.00
$306,000
6.0
Erosion Control (Diversion Berms, Down Pipes,
Etc.)
15.8
AC
$20,000
$316,000
7.0
Revegetation
15.8
AC
$2,000
$31,600
8.0
Surveying
15.8
AC
$2,000
$31,600
Subtotal (Items 1 - 81 =
$1,792,745
9.0
Bonds, Mobilization, & Insurance
4% of Subtotal (Items 1 - 81 =
$71,710
Subtotal (Items 1 - 91 =
$1,864,455
Contingency /10%J=
$186,445
Construction Subtotal =
$2,050,900
10.0
Engineering
15.8
AC
$3,000.00
$47,400
11.0
CQA
15.8
AC
$7,000.00
$110,600
TOTAL =
$2,208,900
Notes:
1. All cost projections are presented in 2019 dollars. Appropriate annual escalators should be applied.
2. Unit costs include materials and anticipated labor/installation costs.
SMITH GARNER, INC. Table 4 - C&DLF A2 Closure JC LF COST ESTIMATES 2019-02

DocuSign Envelope ID: 6C446OA9-4162-49OA-AB87-34B368159E9E
SMITH GARDNER
SHEET: 5/6
JOB #: JOHNSTON-16-4
DATE: 2/27/19
Johnston County Landfill- Financial Assurance
BY: PKS
Table 5: MSW Phases 1-6 - COD Areas 1-2 - Estimated Post -Closure Cost (30-Year)
Item No.
Description
Estimated
Quantity
Units
Unit Cost
Item Cost
1.0
Site Inspection & Record Keeping
80
HR
$75
$6,000
2.0
Revegetation (2% Total Areal
3
AC
$2,000
$6,000
3.0
Mowing (once per year)
153
AC
$100
$15,300
4.0
Erosion Control
1
LS
$7,500
$7,500
5.0
Gates/Fences/Access
1
LS
$2,500
$2,500
6.0
Water Quality Monitoring & Reporting (See Note 41
1
LS
$30,000
$30,000
7.0
LFG Monitoring & Reporting (See Note 51
1
LS
$3,000
$3,000
8.0
LFG System (See Note 6)
1
LS
$5,000
$5,000
9.0
Leachate Management [See Note 71
1
LS
$69,859
$69,859
Subtotal (Items 1 - 9) =
$145,159
Contingency 110%] =
$14,516
Annual Total =
$159,675
30-YEAR TOTAL =
$4,790,247
Notes:
1. All cost projections are presented in 2019 dollars. Appropriate annual escalators should be applied.
2. Unit costs include materials and anticipated labor/installation costs.
3. Assumes total of 143 acres (MSW Phases 1-6 and C&D Areas 1 & 2).
4. The water quality monitoring and reporting cost assumes sampling, analysis, and reporting for 13
wells (detection monitoring), 6 wells (detection monitoring - C&D), 5 wells (assesment monitoring), 5
surface water locations, and 4 Leachate locations (current annual cost = $30,000). This breaks down to
a cost of approximately $6,500 per event for assessment monitoring wells, and approximately $8,500
per event for all remaining locations.
5. The LFG monitoring and reporting cost assumes quarterly monitoring ra $750 per event (annual cost =
$3,000).
6. LFG System cost includes basic maintenance necessary for regulatory compliance ($3,000 per year)
and decommissioning ($2,000 per year to account assumed $60,000 cost) at end of post -closure
7. The annual Leachate management cost is assumed as shown below:
Leachate Quantity
100 gal/acre/day x 68.3 acres (lined) $20.00 per 1,000 gallons =
Staff Cost:
Lab Cost:
Leachate Collection Line Cleanout:
Decommissioning of Leachate Storage Facilities ($300,000 Assumed at End of Post -Closure):
Annual Total =
$49,859.00
$5,000.00
$3,000.00
$2,000.00
$10,000.00
$69,859.00
SMITH GARNER, INC. Table 5 - P1-6 Al&2 Post-CLosr. JC LF COST ESTIMATES 2019-02

DocuSign Envelope ID: 6C446OA9-4162-49OA-AB87-34B368159E9E
SMITH GARNER
SHEET: 6/6
JOB #: JOHNSTON-16-4
DATE: 2/27/19
Johnston County Landfill- Financial Assurance
BY: PKS
Table 6: Estimated Assessment & Corrective Action Cost
Item No.
Description
Annual Cost
30-Year Total
1.0
Current Assessment & Corrective Actions (None)
$0
$0
Subtotal =
$0
Potential Assessment & Corrective Action (See Note 3) _
$2,000,000
TOTAL =
$2,000,000
Notes:
1. All cost projections are presented in 2019 dollars. Appropriate annual escalators should be applied.
2. Unit costs include materials and anticipated labor/installation costs.
3. Per NCGS 130A 295.2 (h), a minimum of $2,000,000 is required for potential assessment and
corrective action at the facility.
SMITH GARNER, INC. Table 6 - Assessment-C. Action JC LF COST ESTIMATES 2019-02