2509_CRSWA_Responsestocomment05262016_DIN26321_20160622

9731-F Southern Pine Blvd.
Charlotte, NC 28273
tel: [phone]
fax: [phone]
www.JoyceEngineering.com

June 22, 2016

Mr. Ming-Tai Chao
NC DEQ Division of Waste Management
1646 Mail Service Center
Raleigh, North Carolina 27699

Re: Comments on the Revised Permit Amendment Application for Continued Operations
Tuscarora Long-Term Regional Landfill- IRL,
Phases 1 through 3 Craven County, North Carolina
Permit No. 2509-MSWLF-1999, Document Identification Number (DIN) 26135

Dear Mr. Chao:
On behalf of the Coastal Regional Solid Waste Management Authority (CRSWMA),
Joyce Engineering, Inc. (JOYCE) is submitting this response to your comments on the Permit
Renewal Application in the email dated May 26, 2016, for the above-referenced project.
For reference, your comments are repeated below in italicized print, with our responses provided
in bold print.
Closure & Post-Closure Plan
1. (Appendix VII-2, Closure Cost Estimates) The revised Closure Plan describes that the
largest area to be closed is 29.6 acres; therefore, the cost unit price and/or quantity should
be increased in the cost estimates accordingly in comparison with those stated in the
previous submittal.
i. Cost Items including Drainage Pipe, Mobilization/demobilization, Survey, Closure
Certification & Erosion and Sediment Control. Please explain why the closure area
increasing from 19.7 acres to 29.6 acres but the drainage pipe lengths are not increased and
the above-mentioned lump sum costs are not increased accordingly in the revised cost
estimates. Please revise the quantity and provide the revise cost estimates.
Slope drains for Phase 3 have been added to the 2015 closure cost estimate. Survey
has been increased proportionally. Erosion and stormwater control did not change as
the downslope drain pipes and vegetation are itemized in the cost estimate. Assuming
closure will take place at one time, mobilization/demobilization and closure certification
should not increase as they are not a function of the area closed.
Mr. Ming-Tai Chao
June 22, 2016
Page 2 of 3

ii. Except for the costs of the synthetics membrane, why the unit costs for other cost items
are decreasing from those in the 2015 submittal. The total costs per acre of close area
($161,469/acre) is less than that ($170,439/acre) in 2009 cost estimate. Please provide the
latest cost data from reliable sources, such as RSMeans reference books, government
agencies, and/or the similar project completed in 2015 to demonstrate that the deduction of
the unit costs for the cost items are reasonable and acceptable. Please be advised that the
costs of the landfill closure construction must be estimated based on the contracting the third
party to complete the project. If the back-up reference(s) is not available, please revise the
cost estimates without reducing unit costs submitted in 2015.
Starting with the 2015 submittal, we have added the additional items described
above in Comment 1.i., and applied the 2016 inflation factor (1.01) obtained from the
DEQ’s website, to the total closure cost.
2. (Section 2.0 Post Closure Activities) Please address the following concerns of the post-
closure plan:
i. (Section 2.3 Post-Closure Maintenance) Please add the maintenance & repair of the
monitoring network – groundwater wells and landfill gas wells, probes & vents to the post-
closure care tasks.
The paragraph has been revised to address the comment.
ii. (Section 2.5.5 Leachate Management) Please address the following concerns:
a. According to the agreement appended to the Revised Permit Application, leachate will be
directly discharged into the constructed sewer system in following years. The description of
leach management in the last sentence of the first paragraph does not likely occur in the post-
closure period.
The paragraph has been revised to address the comment.
b. Pursuant to Rule 15A NCAC 13B. 1627(d)(1)(B), this Section must describe the
maintenance of the leachate collection & storage system, producing leachate generation
records, leachate monitoring requirements, leachate disposal methods, contingency plan for
the extreme conditions, and record keeping requirements.
The paragraph has been revised to address the comment.

PREPARED FOR:

COASTAL REGIONAL SOLID WASTE AUTHORITY
TUSCARORA LONG-TERM REGIONAL LANDFILL
7400 OLD HIGHWAY 70 WEST
TUSCARORA, NC 28523

PERMIT No. 25-09

TUSCARORA LANDFILL
PHASE 3 EXPANSION

VOLUME 2, SECTION VII
CLOSURE & POST CLOSURE PLAN

NOVEMBER 2009
REVISED APRIL 2016
REVISED JUNE 2016

PREPARED BY:

9731-F SOUTHERN PINE BLVD
CHARLOTTE, NC 28273
PHONE: [phone]
FAX: [phone]
VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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VOLUME 2, SECTION VII
CLOSURE AND POST CLOSURE PLAN

TABLE OF CONTENTS

1.0 CLOSURE ACTIVITIES ................................................................................................... 1 
1.1 Closure of Disposal Units .................................................................................................. 1 
1.1.1 Cap Design .................................................................................................................. 1 
1.1.2 Area to Be Capped ...................................................................................................... 2 
1.1.3 Cap Settlement and Stability ....................................................................................... 2 
1.1.4 Drainage and Erosion .................................................................................................. 3 
1.1.5 Freeze/Thaw Effects .................................................................................................... 3 
1.2 Waste Volume ................................................................................................................... 3 
1.3 Closure Plan Schedule ....................................................................................................... 3 
1.4 Posting and Baiting ........................................................................................................... 4 
1.5 Notification ........................................................................................................................ 4 
1.6 Certification ....................................................................................................................... 4 
1.7 Closure Cost Estimate ....................................................................................................... 5 
2.0 POST-CLOSURE ACTIVITIES ........................................................................................ 5 
2.1 Contact ............................................................................................................................... 5 
2.2 Security .............................................................................................................................. 5 
2.3 Post-Closure Maintenance ................................................................................................. 5 
2.4 Inspection Plan .................................................................................................................. 6 
2.5 Monitoring Plan ................................................................................................................. 6 
2.5.1 Groundwater Monitoring ............................................................................................. 6 
2.5.2 Surface Water Monitoring ........................................................................................... 7 
2.5.3 Landfill Gas Monitoring .............................................................................................. 7 
2.5.4 Stormwater, Erosion, and Sedimentation Control Facilities ....................................... 7 
2.5.5 Leachate Management ................................................................................................. 7 
2.6 Training ............................................................................................................................. 8 
2.7 Post-Closure Land Use ...................................................................................................... 8 
2.8 Post-Closure Cost Estimate ............................................................................................... 8 

APPENDICES

Appendix VII – 1 Waste Inventory Calculations
Appendix VII – 2 Closure Cost Estimates
Appendix VII – 3 Post-Closure Inspection Record
Appendix VII – 4 Groundwater Monitoring Well Maintenance Record
Appendix VII – 5 Methane Monitoring Test Report
Appendix VII – 6 Post-Closure Cost Estimate
VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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1.0 CLOSURE ACTIVITIES

Pursuant to the North Carolina Solid Waste Management Rules (15A NCAC 13B .1617), this
Closure and Post-Closure Plan is submitted as part of the Permit to Operate (PTO) renewal the
Tuscarora Landfill.

Within this Closure and Post-Closure Plan, references are made to information and drawings
found in the Facility, Operations, and Engineering Plans to reduce redundancy in this report.
Grading plans, cap sections, and other aspects related to closure, including phased development,
stormwater management, and erosion and sediment control, are discussed in the Engineering and
Operation Plans of this report, and are illustrated on the drawings. The Construction Quality
Assurance (CQA) Plan provided in this application describes methods and procedures to be used
in monitoring construction of the closure cap. Detailed drawings, specifications, and other
documents will be prepared prior to closure for bidding and construction purposes.

The facility will be closed in accordance with the requirements of EPA's Subtitle D regulations
(40 CFR 258.60) and Rule .1627 of the North Carolina Solid Waste Management Rules (15A
NCAC 13 B). Given the proposed development plan for the facility, the waste disposal areas
will be capped and closed in phases as described in the following paragraphs.

1.1 Closure of Disposal Units

1.1.1 Cap Design

Proposed final/intermediate grading contours for the facility are provided on Drawing No. FP-04
of the Facility Plan. Final contours have been designed with post-settlement surface slopes of at
least five percent on top of the cell. Cross-sectional details of the proposed closure cap design,
are provided on Drawing No. EP-10. The following components (bottom to top) are proposed as
shown on the details:

a. Intermediate Cover and Leveling Course - Local soil will be placed over the daily
cover soil to provide at least 12 inches of intermediate cover and a uniform base
for construction of the cap.

b. Gas Migration Layer – A geonet composite will be installed between the
intermediate cover and the overlying infiltration layer. The geonet composite will
provide a pathway for accumulated gas to move laterally to the vents.

c. Composite Cap: GCL Component - The infiltration layer is proposed to consist of
a geosynthetic clay liner. This layer will be constructed over the geonet composite
that will serve as the gas migration layer. Installation and testing requirements for
the cap are provided in the Specifications (Appendix IV-6) and the CQA Plan.

d. Composite Cap: Geomembrane Component - The geomembrane component of
the infiltration layer will consist of a textured 40 mil flexible geomembrane. The
VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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membrane will be in direct contact with the underlying layer. The testing
program and quality assurance requirements for the geomembrane are described
in the CQA Plan.

e. Drainage Layer - A drainage layer consisting of a geonet and geotextile composite
will be placed over the geomembrane to promote drainage.

f. Protective Layer - A layer consisting of at least 18 inches of local soil will be
placed above the drainage layer to provide a protective cover for the underlying
cap components.

g. Vegetative Layer - A layer of topsoil material or organically amended local soil
will be placed above the protective layer. This soil layer will be at least 6 inches
in thickness. The material will be lightly compacted so that a good stand of
vegetation can be established. Soil tests will be conducted prior to seeding to
determine if soil additives are needed to establish and maintain the vegetation.

1.1.2 Area to Be Capped

The IRL (20.2 acres), Phase 1 (20.5 acres) and west slope of Phase 2 (7.3 acres) have been
capped. Phase 2 permitted waste footprint of 17.2 acres has approximately 9.9 acres subject to
closure. All of Phase 3 permitted waste footprint of 19.7 acres remains to be closed. Therefore,
the largest area of the landfill subject for closure during the permit cycle should be 29.6 acres. A
cost estimate for closure of this area is provided as Appendix VII-2.

1.1.3 Cap Settlement and Stability

Non-uniform settlement can be expected over the entire area that will receive a closure cap. The
primary mechanism of settlement is waste consolidation due to decomposition of the landfilled
material. According to Daniel, et al, long-term settlement is typically 5 to 15 percent over 20 to
30 years; however, settlement of about 5 percent can be expected in the first few months
following waste placement. A significant amount of waste consolidation will likely have
occurred by the time each portion of the landfill is closed.

The stability of the proposed cap design under static conditions has been evaluated and is
included in the Engineering Plan. The proposed design was found to be stable at a slope of
3H:1V.

After capped portions are completed, monthly inspections of the final cover will be conducted to
look for areas of the cap that might have experienced displacement. Should these inspections
indicate problem areas, (ponding, exposure of the geomembrane, deep cracks, etc.), repairs will
be initiated as soon as practical.

VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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1.1.4 Drainage and Erosion

A combination of drainage ditches, diversion berms, vegetative cover, and sediment traps and
basins will control drainage and erosion. Construction and design of sediment and erosion
control features will be in accordance with applicable sections of the "North Carolina Erosion
and Sediment Control Planning and Design Manual." Drainage will be directed to proposed
ditches along the perimeter. These ditches will receive runoff from the cap, conveying the flow
to on-site sediment basins. For a detailed discussion regarding stormwater management and
erosion and sediment control, please refer to the Erosion and Sediment Control Plan submitted
under separate cover.

1.1.5 Freeze/Thaw Effects

Based on a published map of frost depths throughout the United States (EPA, November 1993:
A530-R-93-017), the anticipated maximum depth of freeze/thaw effects on the site is less than or
equal to 18 inches. Since the upper 18 inches of final cover soil is not the low-permeability
component of the cap, the effects of freeze/thaw cycles on the closure cap should not be
detrimental to its function.

1.2 Waste Volume

A summary of the total airspace available by phase was made in the Facility Plan and has been
included in Appendix VII-1. The available airspace was calculated based on a comparison of the
base grade and final grade surfaces.

1.3 Closure Plan Schedule

The landfill is designed so that it can be closed incrementally as final contours are reached in
various areas. Prior to beginning closure of any portion of the facility, CRSWMA will notify the
Division that a notice of intent to close the facility has been placed in the operating record. An
itemized list of closure milestones and a proposed schedule follow. Closure activities are
proposed to begin within 30 days of final receipt of waste in the area to be closed. Construction
of the closure cap is to be completed within 180 days following the initiation of closure
activities. The total length of the proposed closure period is 210 days following the final receipt
of waste.

The approximate closure milestones shown in Table 1 below are proposed for use in tracking the
progress of closure activities. A detailed schedule will be established prior to construction.
VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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Table 1
Proposed Closure Milestones and Schedule

Milestone Proposed Schedule from the Date of
Final Receipt of Waste
Testing of borrow sources Within 6 months prior to closure
Grading of intermediate cover Within 30 to 60 days
Placement of soil cap 30 to 150 days
Final inspection of cap by P.E. 150 to 180 days
Construction of stormwater controls 90 to 180 days
Seeding and mulching 150 to 180 days
Preparation of survey plat 180 to 210 days
Submittal of closure certification 180 to 210 days

1.4 Posting and Baiting

At least one sign will remain posted at the entrance to the facility notifying persons of the facility
closing. Also, a notice prohibiting further receipt of waste materials will remain posted at the
entrance. The site will be secured through the use of gates equipped with locks, fencing, and/or
natural barriers. The site will be baited for rodent and vector control before final closure is
initiated.

1.5 Notification

Once closure is complete, a survey plat will be prepared by a registered land surveyor showing
the locations and dimensions of the landfill disposal areas, the locations of groundwater
monitoring wells and gas probes, and the restrictions on future disturbance of the site. A
notation will be recorded on the property deed stating that the land has been used to dispose solid
waste and that its use is restricted under the Closure Plan as required by Rule .1627(c)(8).
Copies of the deed notations as recorded will be placed in the Operating Record and forwarded
to the Division.

1.6 Certification

Upon completion of closure, a licensed professional engineer acting on behalf of the owner will
submit a Certification of Closure to the Division. This Certification will state that the site was
closed in accordance with the Closure Plan and applicable solid waste regulations and laws as
required by Rule .1627(c)(7).

VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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The owner must record a notation on the deed to the landfill facility property at the Craven
County Registrar of Deeds office, or some other instrument that is normally examined during
title search, and notify the Division that the notation has been recorded and a copy has been
placed in the operating record. The notation shall in perpetuity notify any potential purchaser of
the property that the land has been used as a MSW facility and its use is restricted under the
closure plan approved by the Division.

1.7 Closure Cost Estimate

An estimate of closure costs is provided in Appendix VII-2. All costs are given in 2015 dollars.

2.0 POST-CLOSURE ACTIVITIES

Post-closure activities will be conducted at the landfill in accordance with Rule .1627 for a
period of 30 years following closure of the landfill. The length of the period can be increased or
decreased in accordance with Division directives.

2.1 Contact

All correspondence and questions concerning the post-closure care of the unit should be directed
to:
Mr. Bobby Darden
Executive Director
Coastal Regional Solid Waste Management Authority
PO Box 128
Cove City, North Carolina, 28523
252-633-1564

2.2 Security

Access to the site will be controlled by the use of barriers and gates at roadway entrances. These
control devices will be maintained throughout the post-closure care period, and inspected as part
of the monthly inspection program. All barriers and gates will be clearly marked with signs
stating the name and nature of the facility and the person to contact in case of emergency or
breach of security.

2.3 Post-Closure Maintenance

Post-closure maintenance and monitoring will be conducted at the Tuscarora Landfill for a
period of 30 years after final closure. The Division may decrease the length of the post-closure
period if the owner or operator demonstrates that the reduced period is sufficient to protect
human health and the environment, and the Division approves this demonstration. The period
might be increased by the Division if the Division determines that the lengthened period is
necessary to protect human health and the environment.

VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

6
Monitoring will include semiannual sampling of groundwater and surface water, quarterly gas
monitoring and monthly inspection of the final cover and monitoring and control systems.

Routine maintenance and repairs may include upkeep of fencing, gates, & signage, access roads
toward monitoring locations, stormwater, erosion, and sedimentation control facilities, potential
leachate seeps, integrity of the final cap system, groundwater wells, landfill gas wells, and
landfill gas monitoring probes.

Maintenance needs identified through the monitoring program will be initiated no later than 60
days after the discovery, and within 24 hours if a danger or eminent threat to human health or the
environment is indicated. Minor cap maintenance may be deferred until there is a sufficient
amount of work to justify the mobilization of equipment and personnel. Unusual or extreme
maintenance needs due to calamities or vandalism might require the implementation of
emergency contract service procedures established by CRSWMA.

2.4 Inspection Plan

Routine inspections will be conducted throughout the post-closure care period. These
inspections will be carried out monthly unless problems are detected which indicate more
frequent visits. Potential impacts to the public and environment will be considered in
determining the inspection frequency. Items to be included in the monthly inspection will be as
follows:

 Access and security control
 Leachate management and storage systems
 Stormwater management
 Erosion and sediment control
 Gas management
 Groundwater and landfill gas monitoring systems
 Integrity of site benchmarks
 Vector control.

Inspection forms have been prepared for use during each inspection (see Appendix VII-3).
Completed copies of the inspection forms will be kept by the owner, and copies will be
forwarded to the Division for its records.

2.5 Monitoring Plan

2.5.1 Groundwater Monitoring

Groundwater monitoring will occur semiannually throughout the post-closure care period. The
monitoring schedule will continue as established during the active life of the facility. The
applicable procedures outlined in Rules .1633 through .1637 will be followed through post-
closure as required by site findings. Refer to the Water Quality Monitoring Plan in the Design
Hydrogeologic Report, Volume III of this submittal.
VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

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The post-closure care period for the site is 30 years unless modified by the Division. If the
statistical analysis of the groundwater monitoring data does not indicate degradation to the
quality of the groundwater after the 30-year post-closure care period, a request will be made to
terminate the groundwater monitoring program. All groundwater-monitoring wells will be
maintained so that future monitoring can be resumed if desired. A blank groundwater
monitoring well maintenance record form is provided in Appendix VII-4.

2.5.2 Surface Water Monitoring

Surface water will be monitored according to the Water Quality Monitoring Plan.

2.5.3 Landfill Gas Monitoring

Monitoring of explosive gas hazards will be performed as described in the Operations Plan.

The active landfill gas collection and control system will continue to operate according to the
Title V Air Permit (Appendix VI-3).

At the end of the useful life of the gas collection and control system, and after operation is no
longer required according to the Title V Air Permit, the gas extraction wellheads will be removed
to allow any remaining gas to vent to the atmosphere. All buried gas system components will be
left in place. The blower/flare and processing equipment will be decommissioned and may be
removed from the facility. The facility will continue explosive gasses monitoring beyond the
decommissioning of the active gas collection period in accordance with the Post-Closure criteria
by Rule .1627 (d).

2.5.4 Stormwater, Erosion, and Sedimentation Control Facilities

Stormwater management features proposed in the Erosion and Sediment Control Plan are
designed to function throughout the post-closure care period. Drainage ditches and sediment
ponds will be inspected and maintained as needed to control surface water runoff and erosion.

2.5.5 Leachate Management

Leachate management will continue at the facility during the post-closure period as long as
leachate continues to be generated. The leachate will be collected to the facility’s leachate
storage ponds and pumped via sewer line to the local wastewater treatment plant for disposal.
The collection system will be evaluated periodically and maintained to prevent clogging.

The facility Operations Plan Section 9.0 Leachate Management Plan covers maintenance of
leachate collection system, leachate generation records, leachate monitoring, leachate disposal
and contingency plan for extreme conditions.

VII – Closure and Post Closure Plan Joyce Engineering, Inc.
CRSWMA – Tuscarora Landfill PTO Renewal November 2009
Craven County, North Carolina Rev. June 2016

8
When leachate collection ceases, the following closure activities will be completed within 180
days. Leachate collection pipes will be securely plugged, and liquid and solid waste, and
associated piping will be removed from the leachate storage facilities. Contaminated subsoils,
structures, and equipment will also be removed. Material that is removed will be disposed in
accordance with applicable requirements.

2.6 Training

Personnel responsible for conducting monitoring activities, site inspections and maintenance will
be competent individuals trained in the skills needed for their job. Personnel will continue to
receive training as new programs become available.

Groundwater and surface water monitoring will be performed by a qualified firm, and laboratory
analysis will be conducted by a certified environmental laboratory.

2.7 Post-Closure Land Use

The primary land use for the site after closure of the landfill will be open dormant green space.
Limited passive recreational uses may be proposed at a later time.

2.8 Post-Closure Cost Estimate

An estimate of post-closure care costs is provided in Appendix VII-6. All costs are given in
2015 dollars.

(End)

GROUNDWATER MONITORING WELL MAINTENANCE RECORD

FACILITY: WELL #:

LOCATION: DATE:

INSPECTOR: COMPANY:

1. Is surface water diverted away from the wellhead?

2. Is the concrete pad still intact and free of cracks?

3. Has surface water runoff undercut the concrete pad

4. Is the outer casing still secure and locked?

5. Is the well identification tag present and is it legible?

5a. Does the well identification tag provide the following information:

 The well identification number?
 Drilling contractor name and registration number?
 Total depth of well?
 Depth to screen?
 A warning that the well is not for water supply and that the ground water may
contain hazardous materials.

6. Is the grout between the inner and outer well casings all the way to the ground surface?

7. Is the inner casing firmly grouted in place?

8. Are the inner and outer casings upright and unobstructed?

9. Is water collecting in the outer casing? Does a weep hole need to be bored in the outer casing to
provide drainage?

10. Is the monitoring well accessible by a four-wheel drive vehicle?

11. Have brush and weeds been trimmed so that the well is easy to locate and access?

12. Does the inner well casing have a vented cap?

13. Is the monitoring well visible and adequately protected from moving equipment?

POST-CLOSURE INSPECTION RECORD

FACILITY: WELL #:

LOCATION: DATE:

INSPECTOR: COMPANY:

1. Access and Security Control

o Is a notice prohibiting the further disposal of waste materials clearly visible at the
entrance to the facility?
o Is the site adequately secured by means of gates, chains, berms, fences or other
security measures to prevent unauthorized entry?
o Are the access roads to and within the site maintained to provide access to the
closed disposal area and to all monitoring points?

2. Erosion and Sediment Control

o Is the vegetation adequate to stabilize the site and prevent erosion?
o Are the erosion control measures adequate to prevent silt from leaving the site
and to prevent excessive on-site erosion?
o Do the sediment basins require cleaning out, as indicted by the level of sediment
buildup?

3. Drainage Control Requirements

o Are all areas adequately sloped to promote surface water runoff in a controlled
manner?
o Are there areas of observed settlement, subsidence, and/or displacement of the
closure cap?
o Are all drainage channels free of accumulated sediment?

4. Uncontrolled Escape of Leachate or Landfill Gas

o Are there any leachate seeps observed?
o Are there any signs of uncontrolled releases of landfill gas?

5. Environmental Monitoring Systems

o Are all monitoring wells (gas and groundwater) properly maintained? (Note:
Complete the Groundwater Monitoring Well Maintenance Record during
semiannual sampling events.)

6. Miscellaneous

o Are all site benchmarks marked and evident?
o Do vector control measures appear adequate?

METHANE MONITORING TEST REPORT

Facility:
Location:

Date of Test:

Weather Condition:

Temperature: Barometric Pressure:
Sampling Personnel:

Monitoring Point

Description/Location

Time
Methane Concentration
(% of LEL)

Opinion of Cost for Closure (Phases 2 and 3; 29.6 acres)
Facility Name: Tuscarora Landfill Date: 09/11/15
Calculated By: HMK
Permit No.: 25-09 Reviewed By: LB 9731-F Southern Pine Blvd.
Facility Address: PO Box 128 Revision No.: 3 6/9/2016 Charlotte, North Carolina 28273
Cove City, NC 28523 Project No.: 618.1601.11 phone - 704.817.2037
Facility Owner: Coastal Regional Solid Waste Management Authority Task No.: 05 fax - 704.837.2010
www.joyceengineering.com
CLOSURE COSTS:
Native Soil for Slope and Fill-Intermediate Cover (Site Preparation)Notes & Guidance Values
a. Area to be capped 29.6 acres x 4840 yd2/acre = 143,264 yd2 Geonet Composite (Drainage and Gas Migration)Notes & Guidance Values
b. Depth of native soil for slope and fill 12 inches x 1yd/ 36 inches = 0.33 yd a. Quantity of Geonet Composite needed 29.6 acres x 43560 ft2/acre = 1,289,376 ft
2
c. Quantity of native soil needed (a x b)47,755 yd
3 b. Purchase unit cost $0.39 $0.39 /ft
2
d. Percentage of soil from off-site 100 100% c. Delivery unit cost $0.00 $0.00 /ft
2
e. Excavation unit cost (on-site material)$1.79 $1.79 /yd
3 d. Installation unit cost $0.07 $0.07 /ft
2
f. Purchase unit cost (off-site material)$3.58 $3.58 /yd
3 e. Total geocomposite unit cost (b + c + d)$0.45 /ft
2
g. Delivery Cost (off-site material)$8.80/yd3 for 5 mil RT $8.80 /yd3 f. Total geocomposite cost (a x e)$581,509
h. Placement/Spreading unit cost $1.65 $1.65 /yd3
i. Compaction unit cost $0.41 $0.41 /yd3 Geosynthetic Clay Liner
j. Total on-site native soil unit cost (e + h + i) $3.85 /yd
3 a. Quantity of GCL needed 29.6 acres x 43560 ft2/acre = 1,289,376 ft
2
k. Total off-site native soil unit cost (f + g + h + i)$14.43 /yd
3 b. Purchase unit cost $0.34 $0.34 /ft
2
l. Total on-site native soil cost [j x (1-d) x c]$0 c. Delivery unit cost $0.00 $0.00 /ft
2
m. Total off-site native soil cost (c x d x k)$689,195 d. Installation unit cost $0.10 $0.10 /ft
2
n. Percent compaction 20 20% e. Total GCL unit cost (b + c + d)$0.44 /ft
2
o. Total native soil cost (l + m) * (1 + n)$827,034 f. Total GCL cost (a x e)$567,325
Topsoil (Vegetative Layer)IX. Soil Admixture
a. Area to be capped 29.6 acres x 4840 yd2/acre = 143,264 yd
2 a. Area to be capped acres x 4840 yd2/acre = 0yd2
b. Depth of topsoil needed 6 inches x 1yd/ 36 inches = 0.17 yd b. Soil admixture unit cost $2.57 $2.57 /yd
2
c. Quantity of topsoil needed (a x b)23,877 yd
3 c. Total soil admixture cost (a x b)$0.00
d. Percentage of soil from off-site 100 100%
e. Excavation unit cost (on-site material)$1.79 $1.79 /yd3 Protective Soil Cover
f. Purchase unit cost (off-site material)$5.50 $5.50 /yd
3 a. Area to be capped 29.6 acres x 4840 yd2/acre = 143,264 yd
2
g. Delivery Cost (off-site material)$8.80/yd3 for 5 mil RT $8.80 /yd
3 b. Depth of soil needed 18 inches x 1yd/ 36 inches = 0.50 yd
h. Placement/Spreading unit cost $1.65 $1.65 /yd
3 c. Quantity of soil needed (a x b)71,632 yd
3
i. Compaction unit cost $0.41 $0.41 /yd
3 d. Percentage of soil from off-site 25 25%
j. Total on-site topsoil unit cost (e + h + i) $3.85 /yd
3 e. Excavation unit cost (on-site material)$1.79 $1.79 /yd
3
k. Total off-site topsoil unit cost (f + g + h + i)$16.36 /yd
3 f. Purchase unit cost (off-site material)$3.58 $3.58 /yd
3
l. Total on-site topsoil cost [j x (1-d) x c]$0 g. Delivery Cost (off-site material)$8.80/yd3 for 5 mil RT $8.80 /yd
3
m. Total off-site topsoil cost (c x d x k)$390,562 h. Placement/Spreading unit cost $1.65 $1.65 /yd
3
n. Percent compaction 10 10% i. Compaction unit cost $0.41 $0.41 /yd
3
o. Total topsoil cost (l + m) * (1 + n)$429,618 j. Total on-site soil unit cost (e + h + i) $3.85 /yd3
k. Total off-site soil unit cost (f + g + h + i)$14.43 /yd
3
Drainage Layer l. Total on-site soil cost [j x (1-d) x c]$206,837
a. Area to be capped acres x 4840 yd2/acre = 0yd2 m. Total off-site soil cost (c x d x k)$258,448
b. Depth of sand or gravel needed 0 inches x 1yd/ 36 inches = 0.00 yd n. Percent compaction 20 20%
c. Quantity of sand or gravel needed (a x b)0 yd3 o. Total protective soil cover cost (l + m) * (1 + n)$558,343
d. Purchase unit cost $6.90 $6.90 /yd3
e. Delivery cost (for off-site material)$7.85/yd3 for 10 mil RT $7.85 /yd3 Soil Testing
f. Spreading unit cost $1.39 $1.39 /yd
3 a. Number of acres to be capped 29.6 29.6 acres
g. Compaction unit cost $0.12 $0.12 /yd
3 b. Testing unit cost
h. Percent compaction sand = 10%, gravel = 5%10 %(Includes density & permeability tests and technician)$2,508 $2,508 /acre
i. Total drainage layer unit cost (d + e + f + g)$16.26 /yd3 c.Total Soil Testing Cost (a x b)$74,236.80
j. Total drainage layer cost [c x i x (1+h)]$0.00
Seeding
IV.On-Site Clay a. Number of acres to be vegetated 29.6 29.6 acres
a. Area to be capped acres x 4840 yd2/acre = 0yd2 b. Unit cost for prep, seed, and fert.$1,925 $1,925 /acre
b. Depth of clay needed 0 inches x 1yd/ 36 inches = 0.00 yd c.Total Seeding Cost (a x b)$56,980
c. Quantity of clay needed (a x b)0 yd3
d. Excavation unit cost $5.36 $5.36 /yd3 Landfill Gas (LFG) Management System
e. Placement/Spreading unit cost $1.38 $1.38 /yd
3 a. Number of acres of landfill to be closed 29.6
f. Compaction unit cost $1.79 $1.79 /yd
3 c. Number of LFG wells 19
g. Total on-site clay unit cost (d + e + f + g)$8.53 /yd
3 e. Average cost per LFG well $3,850
h. Percent compaction 25%25 %g. Total cost for LFG wells (c x e)$73,150 total
i. Total on-site clay cost [c x g x (1 + h)]$0.00 Landfill Gas Appurtenances
h. Header Pipe (12") ft.2500
V. Off-Site Clay i. 12" Pipe Unit Cost (including installation)$39 $96,250.00 total
a. Area to be capped (1acre=4840yd²)acres x 4840 yd2/acre = 0yd2 j. Header Pipe (10") ft.200
b. Depth of clay needed (6" = 0.16 yd) 0 inches x 1yd/ 36 inches = 0.00 yd k. 10" Pipe Unit Cost (including installation)$33 $6,600.00 total
c. Quantity of clay needed (a x b)(a x b)0yd3 l. Lateral Pipe (8") ft.1830
d. Purchase unit cost $45.36 $45.36 /yd
3 m. 6" Pipe Unit Cost (including installation)$22 $40,260.00 total
e. Delivery cost (for off-site material)$7.85/yd3 for 10 mil RT $7.85 /yd
3 n. Isolation Valve 0
f. Spreading unit cost $1.38 $1.38 /yd
3 o. Isolation Valve Cost (including installation)$1,320 $0.00 total
g. Compaction unit cost $1.79 $1.79 /yd
3 p. Condensate Traps 2
h. Total off-site clay unit cost (d + e + f + g)$56.38 /yd
3 q. Condensate Trap Unit Cost (including installation)$2,750 $5,500.00 total
i. Percent compaction 25%25 % r. Blower/Flare Skid (already in place)$0.00 $0.00 total
j. Total on-site clay cost [c x h x (1 + i)]$0.00 s. Length of LFG detection probe in linear feet 100
t. Number of LFG detection probes to be installed 0 $0.00
Drainage Pipe u. LFG detection probe unit cost $40.00
a. Length of pipe needed (15")1537 1537 LF v. Total cost for LFG detection probes (b x d x f)$0.00
b. Pipe unit cost (15")$21.73 $21.73 /LF w. Total gas management system cost $221,760
c. Length of pipe needed (12")1830 1830 LF
d. Pipe unit cost (12")$16.50 $16.50 /LF Groundwater monitoring system
e. Trenching and backfilling cost $13.20 $13.20 /LF a. Hydrogeologic study $10,000 or as needed $0
f. Total drainage pipe unit cost (15")(b + e)$34.93 /LF b. Monitoring well construction/well $1,225 per well $1,225.00 /well
g. Total drainage pipe unit cost (12")(d + e)$29.70 /LF c. Number of wells to be installed 0 0 wells
h.Total drainage pipe cost [(a x f) + (c x g)]$108,031 d. Additional well length of 50'0 0LF
e. Unit cost for additional well length over 50'$22.00 $22.00 /LF
Synthetic Membrane f. Total additional cost for well length over 50'(e x d)$0
a. Area to be capped with FML 29.6 acres x 43560 ft2/acre = 1,289,376 ft
2 g. Total monitoring well construction cost (b x c)$0
b. Purchase unit cost $0.29 $0.29 /ft
2 h. Total Groundwater monitoring system cost (a + e + f)$0.00
c. Delivery unit cost $0.00 $0.00 /ft2
d. Installation unit cost $0.11 $0.11 /ft2 Mobilization/demobilization $27,500
e. Total synthetic membrane unit cost (b + c + d)$0.40 /ft
2
f. Total synthetic membrane cost (a x e)$510,593
Survey and deed notation $19,832
VIII. Geotextile Filter Fabric
a. Quantity of filter fabric needed 0.0 acres x 43560 ft2/acre = 0 ft2
b. Purchase unit cost $0.26 $0.26 /ft2 Closure Certification $27,500
c. Delivery unit cost $0.00 $0.00 /ft
2
d. Installation unit cost $0.00 $0.00 /ft2
e. Total synthetic membrane unit cost (b + c + d)$0.26 /ft2 Erosion and Stormwater Control $110,000
f. Total synthetic membrane cost (a x e)$0.00
Total Construction Closure Costs
Total Unadjusted Closure Costs $4,120,261
Notes:
Inflation factor 1.01 was applied to the 2015 Financial Assurance unit costs.
In the 2015 Financial Assurance, guidance values were attained from recently completed JOYCE projects, and suppliers' price quotes. Contingency (10%)$412,026
Material Costs for Geosynthetics include Delivery.
Engineering Fees
Construction Documents $82,500
Material Cost List Construction Quality Assurance $330,000
Total Closure Cost 2016 $4,944,787
Material Installation Material Installation (Phase 2 and 3)
Synthetic Membrane (per ft2) (per ft2) (per ft2) (per ft2)2015 TOTAL POST-CLOSURE COST ESTIMATE x 1.01 (2016 inflation factor) =$4,994,235.35
$0.38 $0.10 $0.42 $0.11 Total Area to be capped 29.6 acres
$0.26 $0.10 $0.29 $0.11 Approximate closure cost per acre $168,724 /acre
$0.28 $0.10 $0.31 $0.11
Geonet Composite
$0.35 $0.06 $0.39 $0.07
$0.39 $0.06 $0.43 $0.07
$0.60 $0.08 $0.66 $0.09
Geosynthetic Clay Liner
$0.27 $0.09 $0.30 $0.10
$0.31 $0.09 $0.34 $0.10
2015 Prices (10% Inflation)
60 mil HDPE
40 mil LLDPE
40 mil PVC
6 oz
8 oz
Triplanar
Type I (Regular)
Type II (Reinforced)
2009 Prices
Financial Assurance
CRSWMA - Tuscarora Landfill Permit Renewal
Craven County, North Carolina Page 1
Joyce Engineering, Inc.
November 2009
Rev. November 2015
Rev. June 2016
Opinion of Cost for Post Closure Care
Facility Name: Tuscarora Long-Term Regional Landfill Date: 09/11/15
Calculated By: HMK 9731-F Southern Pine Blvd.
Permit No.: 25-09 Reviewed By: LB Charlotte, North Carolina 28273
Facility Address: PO Box 128 Revision No.: 3 6/9/2016 phone - 704.817.2037
Cove City, NC 28523 Project No.: 618.1601.11 fax - 704.837.2010
Facility Owner: Coastal Regional Solid Waste Management Authori Task No.: 05 www.joyceengineering.com
POST CLOSURE COSTS:
Ground & Surface Water Monitoring Notes & Guidance Values
a. Total number of monitoring wells 42 42 wells
b. Number of sampling events per year 2 sampling events per year 2 events
c. Monitoring costs per sample $1,650 $1,650 /sample
d. Miscellaneous Engineering Fees $11,000 or as required $10,700 /year
e. Total annual monitoring costs [(a x b x c) + d]$149,300 /year
f.Total number of surface water monitoing points 4 4
g.Number of sampling events per year 2 sampling events per year 2 events
h.Monitoring costs per sample $165 $165 /sample
i. Total annual monitoring costs (f x g x h)$1,320 /year
j. Post-closure period 30 30 years
k. Total cost for post-closure period (e + i x j)$4,518,600.00
Landfill Gas Monitoring System Maintenance
a. Monthly wellfield monitoring (12 events per year) 12 events/year
b. Unit cost for 'a' $1,650.00 $1,650 /event
c. Quarterly Surface Emissions & Explosive Gases (4 events per year) 4 events/year
d. Unit cost for 'c' $1,650.00 $1,650 /event
e. Annual Reporting (Title V Permit Compliance) $11,000 per year $11,000
f. Maintenance and Response to Shutdowns $11,000 per year $11,000
g. Post-closure period 20 20 years
h. Total annual cost for post-closure period [(a x b) + (c x d) + e + f]$48,400
i. Total cost for post-closure period (g x h)$968,000
Decommisioning of Landfill Gas Collection and Control System
a. Total number of wellheads 59 59 wells
b.Estimated cost per well head 110 $110 /well
c.Estimated cost of wellhead removal (a x b)$6,490
d.Decommissioning of blower/flare $1,100.00 $1,100
e.Decommissioning of processing equipment $27,500.00 $27,500
f.Total cost for decommissioning LFGCC system (c + d + e)$35,090
Explosive Gas Monitoring Period 20 to 30 Years
Quarterly Surface Emissions & Explosive Gases (4 events per year) 4 events/year
Unit cost for 'c' $1,650.00 $1,650 /event
Post-closure period (years 20 to 30) 10 10 years
Total annual cost for post-closure period $66,000
Leachate Management
a. Private disposal unit cost $0.00 $0.00 /gal
b. POTW disposal unit cost $0.00 $0.00 /gal
c. Direct discharge to a POTW unit cost (2015 rate) $0.009 $0.009 /gal
d. Amount of leachate generated (HELP Model) 0.3 gal/acre/day 8,497 gal/yr
e. Load/unload unit cost $0 $0.00 /truck
f. Capacity of truck 0 0 gallons
g. Number of trucks required per year (d ÷ f) 0 trucks/year
h. Distance over 5 miles of hauling (one way) 0 0 miles
i. Cost of hauling per mile $0.00 $0.00 /mile
j. Total cost for loading / unloading and hauling [(e x g) + (h x i)] $0.00 /year
k. Total annual cost for Private Disposal (a x d) $0.00 /year
l. Total annual cost for POTW Disposal (delivered) [(b x d) + j] $0.00 /year
m. Total annual cost for POTW Disposal (direct) (c x d)$78 /year
n. Number of sampling events per year 2 sampling events per year 2 events
o. Monitoring costs per sample $165 $165 /sample
p.Total annual monitoring costs (n x o)$330 /year
q. Total leachate management cost (m + p)$408 /year
r. Post-closure period 30 30 years
s. Total cost for post-closure period (n x o)$12,252.87
Routine Maintenance and Repairs
a. Mowing frequency 2 2 visits/year
b. Area to be maintained (acres) 77.6 77.6 acres
c. Mowing unit cost per visit $87 $87 /acre/visit
d. Total mowing cost per year (a x b x c) $13,486.88 /year
e. Fertilizer unit cost $318 $318 /acre
f. Total fertilizer cost per year (b x e) $24,669.04 /year
g. Number of years to reseed (max 3 years) 3 3 years
h. Area to reseed (acres) 77.6 77.6 acres
i. Reseeding unit cost $1,980 $1,980 /acre
j. Total reseeding cost (g x h x i) $460,944
k. Mobilization/demobilization cost per year $116 $116 /year
l. Total maintenance and repairs cost per year (d + f + k)$38,271 /year
m. Post-closure period 30 30 years
n.Total cost for post-closure period [(m x l) +j]$1,609,086.60
Vector and Rodent Control
a. Total vector and rodent control costs per year $2,200 or as required $2,140 /year
b. Post-closure period 30 30 years
c.Total cost for post-closure period (a x b)$64,200
Total Post-Closure Costs
Total Unadjusted Post-Closure Costs $7,273,229
Contingency (10%) $727,323
Total Post-Closure Cost-Estimate $8,000,552
Overall Total Costs
2015 TOTAL POST-CLOSURE COST ESTIMATE x 1.01 (2016 inflation factor) = $8,080,558
Total Closure Cost-Estimate $4,994,235
(From previous page)
Potential Assessment and Corrective Action (PACA), NCGS 130A-295.2(h) $2,000,000
TOTAL CLOSURE & POST-CLOSURE COST ESTIMATE = $15,074,793
Financial Assurance
CRSWMA - Tuscarora Landfill Permit Renewal
Craven County, North Carolina Page 2
Joyce Engineering, Inc.
November 2009
Rev. November 2015
Rev. June 2016