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3.9 Closure Costs
The largest area to be closed within the permitted life will be Phase 1, 2, and 3 (65 Ac.). The
estimated costs shown below are only for Phase 1, 2 and 3. Post Closure will be 30 years after
closure.
Closure Costs:
Closure will consist of the following which costs are estimated as being done by a third party.
1. 18" of 1x10-5 cm/sec. soil cover
2. 40 Mil LLDPE Liner and Drainage net
3. Erosion Control Devices
4. 24" Erosive layer
5. Seeding and Mulching
6. Mobilization/Demobilization
7. Labor Costs
8. Stone for gas venting
9. Geotextile for gas venting
10. Vent pipes for gas venting
11. Engineering Costs and QA/QC of the Composite liner and certification of
closure
Estimate of Probable Costs:
1. 18" of 1x10-5 cm/sec. soil cover for 65 acres:
Total yardage + 15% = 180,895 yd3 @ a cost of $9.00/yd3
Cost = $1,628,055
2. 40 Mil LLDPE Liner and Drainage net for 65 acres
Total Footage + 15% = 3,256,110 ft2 @ a cost of $0.85/ft2
Cost = $2,767,694
3. Erosion Control devices
Estimated costs @ $75,000
Cost = $75,000
4. 24" Erosive soil layer for 65 acres.
Total yardage + 15% = 241,194 yd3 @ a cost of $4.38/yd3
Cost = $1,056,430
5. Seeding and Mulching for 65 acres.
Estimated cost of $2,000/acre
Cost = $130,000
6. Mobilization/Demobilization.
Estimated cost of $200,000
7. Labor Costs.
Estimated cost of $700,000
8. Vent pipes for methane gas collection.
Estimated cost @ $600.00 each (62).
Cost = $37,200
9. Engineering Costs and QA/QC of the Composite liner and certification of closure.
Estimated cost = $700,000
Total of Estimated Phase 1, 2 and 3 Closure Costs:
1. $ 1,628,055
2. $ 2,767,694
3. $ 75,000
4. $ 1,056,430
5. $ 130,000
6. $ 200,000
7. $ 700,000
8. $ 37,200
9. $ 700,000
Total: $ 7,294,379
MSW
4.2 Post Closure Costs
The largest closed area to be monitored within the post closure life will be Phase 1, 2 and 3 (65
Ac.).
Post Closure Costs:
Methane and/or hydrogen sulfide (H2S) gas, ground water and surface water will be monitored for
30 years after closure. The cap will also have to be monitored for the 30 year period. All costs
include reports, data analysis, and certifications.
1. Ground and Surface Water monitoring semi-annually for 30 years for
Subtitle D Appendix I constituents and statistical analysis.
Estimated cost/sample = $840.00/sample
Total annual samples = 2(16 wells + 4 surface) = 40 samples/year
Estimated cost = 30 years x 40 samples/year x $840.00/sample
Cost = $1,008,000
2. Methane Gas monitoring quarterly for 30 years.
Estimate $600.00/quarter = $2,400.00/year
Estimated cost = 30 year x $2,400.00
Cost = $72,000.00
3. Closure of sedimentation and erosion control devices.
Estimate $24,000 for closure
Cost = $24,000
4. Leachate Management including pumping data.
Estimate $400,000 for the 30 years.
Cost = $400,000
5. Closure of leachate lagoon.
Estimate $30,000
6. Maintenance of gas vents, monitoring wells, pumps, access roads, fencing,
signage, EOW markers, vegetation and mowing, etc.
Estimate $520,000
7. Decommissioning of LGCCS System.
Estimated cost/well head = $500.00
62 well heads x 500.00 = $31,000
Cost = $31,000
8. Cap Monitoring and repairing any problems.
Estimate $100,000 for the 30 years.
Cost = $100,000
.
Total of Estimated Phase 1, 2 and 3 Post Closure Costs:
1. $1,008,000
2. $ 72,000
3. $ 24,000
4. $ 400,000
5. $ 30,000
6. $ 520,000
7. $ 31,000
8. $ 100,000
Total: $2,185,000
4.3 Potential Assessment and Corrective Action (PACA) Estimate
Approved PACA Cost Estimate = $2,000,000
C&D/LCID
3.7 Closure Costs
The largest area to be closed within the permitted life will be 40 acres. Post Closure will be 30
years after closure.
Closure Costs:
Closure will consist of the following which costs are estimated as being done by a third party.
1. 18" of 1x10-5 cm/sec. cohesive soil cap;
2. Erosion Control Devices;
3. 18" Erosive layer;
4. Seeding and Mulching;
5. Mobilization/Demobilization;
6. Labor Costs; and
7. Engineering Costs and QA/QC of the Composite liner and certification of closure.
Estimate of Probable Costs:
1. 18" of 1x10-5 cm/sec. cohesive soil cap for 40 acres:
(including surface preparation)
40 x 43,560 = 1,742,400 x 1.5 = 2,613,600 / 27 = 96,800 cy
Total yardage + 15% = 111,320 yd3 @ a cost of $9.00/yd3
Cost = $1,001,800
2. Erosion Control devices
Estimated costs @ $75,000
Cost = $75,000
3. 18" erosive soil layer for 40 acres.
40 x 43,560 = 1,742,400 x 1.5 = 2,613,600 / 27 = 96,800cy
Total yardage + 15% = 111,320 yd3 @ a cost of $4.38/yd3
Cost = $487,582
4. Seeding and Mulching for 40 acres.
Estimated cost of $2,000/acre
Cost = $80,000
5. Mobilization/Demobilization.
(including Machine/Equipment costs and fuel costs)
Estimated cost of $200,000
6. Labor Costs.
Estimated cost of $310,000
Cost = $310,000
7. Vent pipes for methane gas collection.
Estimated cost @ $600.00 each (25 vents).
Cost = $15,000
8. Engineering Costs and QA/QC of the Composite liner and certification of closure.
(including CQA field monitoring and lab testing, CQA reporting and certification,
construction administration, construction documentation and bidding, Survey as-builts
and recordation fees)
Estimated cost = $200,000
Cost = $200,000
Total of Estimated Closure Costs:
1. $ 1,001,800
2. $ 75,000
3. $ 487,582
4. $ 80,000
5. $ 200,000
6. $ 310,000
7. $ 15,000
8. $ 200,000
Total: $ 2,369,382
C&D/LCID
4.2 Post Closure Costs
The largest closed area to be monitored within the post closure life will 40 acres.
Post Closure Costs:
Methane gas, ground water and surface water will be monitored for 30 years after closure. The
cap will also have to be monitored for the 30 year period. All costs include reports, data analysis,
and certifications.
1. Ground and Surface Water monitoring semi-annually for 30 years for
appendix I constituents and statistical analysis.
Estimated cost/sample = $840.00/sample
Total annual samples = 2(11 wells + 3 surface) =28 samples/year
Estimated cost = 30 years x 28 samples/year x $840.00/sample =
Cost = $705,600
2. Methane Gas monitoring quarterly for 30 years.
Estimate $600.00/quarter = $2,400.00/year
Estimated cost = 30 year x $2,400.00 = $72,000.00
Cost = $72,000
3. Cap Monitoring and repairing (including maintenance of all gates, fencing, access
roads and signs, mowing and re-vegetation)
Estimate $300,000 for the 30 years.
Cost = $300,000
4. Closure of sedimentation and erosion control devices.
Estimate $24,000.00 for closure
Cost = $24,000
5. Maintenance of gas extraction system.
Estimated cost/year = $3,000.00/year
Cost = $90,000
6. Decommissioning of LGCCS System.
Estimated cost/well head = $500.00
25 well heads x 500.00 = $12,500
Cost = $11,000
7. Administration/Record keeping
Estimate $4,000.00/year for 30 years
Cost = $120,000
Total of Estimated Post Closure Costs:
1. $ 705,600
2. $ 72,000
3. $ 300,000
4. $ 24,000
5. $ 90,000
6. $ 12,500
7. $ 120,000
Total: $1,324,100
4.3 Corrective Action Plan Costs
Semi-annual sampling costs are/were estimated in the post closure financial assurance.
However, even though estimated costs to perform corrective action are relatively minor, to date,
financial assurance for corrective action has not been submitted. MNA sampling will be
incorporated into the existing semi-annual sampling schedule. The additional expense for MNA is
seen in laboratory costs.
MNA Sampling + Laboratory Cost Estimates
Sampling equipment for MNA Parameters ($1,200/event) = $2,400
Estimated cost/sample = $750/sample
Total MNA samples = 6 (3 monitoring wells) samples/year
Estimated total annual MNA laboratory & sampling costs = $6,900
Estimated total 5-year MNA laboratory & sampling costs = $34,500
Estimated total 30-year MNA laboratory & sampling costs = $207,000
Phyto Remediation Cost Estimates
Annual tree re-planting and upkeep is $600 and for 30 years it is $18,000.
Annual monitoring and reporting is 2.5 hrs/yr at $75/hr for 30 years is $6,375
Estimated total 30-year Phyto Remediation Cost is $24,375
Total Corrective Action Plan Costs = $231,375
Continued operation of the GCCS is included in Closure/Post-Closure costs and is, therefore, not
included in the estimated corrective action costs. The financial assurance test for closure/post-
closure costs is included in the Permit Application for Continued Operation. A revised financial
assurance mechanism including the proposed 30-year corrective action costs will be submitted to
the Solid Waste Section under separate cover.
These costs are not included in the PACA Cost estimate in [Part1 (MSW) Section 4.3].
1
Chao, Ming-tai
From:Chao, Ming-tai
Sent:Wednesday, March 21, 2018 12:37 PM
To:Wayne Sullivan (wsullivan@mesco.com)
Cc:Jonathan Pfohl (jpfohl@mesco.com); 'Tim.Rogers@waynegov.com'
(Tim.Rogers@waynegov.com); Ritter, Christine; Rice, Sarah M; Kramer, Renee P
Subject:FA for Phytoremediation, Wayne County Landfill, 96-01
Hi Wayne:
I am assigned to review FA for Wayne County Landfill units (96-01 & 96-06) and go through the cost estimates
of all required tasks. One approved task – implementation of Phytoremediation at the approximately ½-acrea
area around MW-2 at the C&DLF/closed unlined MSWLF unit as proposed in the 12/20/2017 CAP Addendum
(FID 1068109) does not have the costs associated with approved routine monitoring, fertilizing, replacing dead
trees, and etc. Please provide the cost estimate for this task through the entirely anticipated duration when the
groundwater will be restored to the level below NC 2L standards.
Thanks for the assistance.
Ming Chao
Ming-Tai Chao, P.E.
Environmental Engineer
Permitting Branch, Solid Waste Section
NCDEQ, Division of Waste Management
(Mailing Address)
1646 Mail Service Center
Raleigh, NC 27699-1646
(Street Address)
Green Square, 217 West Jones Street
Raleigh, NC 27603
Tel. 919-707-8251
ming.chao@ncdenr.gov
http://portal.ncdenr.org/web/wm/sw
E-mail correspondence to and from this address may be subject to the North Carolina Public Records Law and may be disclosed to third parties.