TECHNICAL SPECIFICATIONS

Webster County

Landfill Closure Project

Prepared for:

West Virginia Department of Environmental Protection Division of Land Restoration

Office of Environmental Remediation

Landfill Closure Assistance Program

601 57th Street, SE

Charleston, West Virginia 25304-2345

Prepared by:

Potesta & Associates, Inc.

7012 MacCorkle Avenue, SE

Charleston, West Virginia 25304

Phone: (304) 342-1400 Fax: (304) 343-9031

E-Mail: potesta@potesta.com

Project No. 0101-17-0380-006

December 5, 2019

(This document contains 237 pages, plus appendices.)

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page ii

PROJECT NARRATIVE

The Webster County Landfill (WCLF) is located approximately 3.5 miles southwest of Webster

Springs, West Virginia. The landfill reportedly consists of approximately 2.0 acres of waste disposal area according to the West Virginia Department of Environmental Protection’s (WVDEP) file information where the proposed cap after regrading the site will be approximately 5.6 acres.

The total permitted area will be 23 acres and include the proposed capped waste area, leachate impoundment site, sediment control pond, access roads, and the soil borrow/waste area. The

WCLF is located at Latitude 38° 26’ 35.50”N and Longitude -80° 27’ 37.86”N. Directions to the site from the Town of Cowen head northeast on State Route 20 through town, follow State

Route 20 for 6.9 miles, turn left onto Price Run Road, continue on Price Run Road (County

Route 36) for 1.0 mile, at the 4-way intersection turn right onto Excelsior Pleasant Ridge Road

(County Route 40), continue on this road for 1.0 mile and the entrance to the landfill will be on the left. Issues at the landfill include possible leachate seeps discharging to surface water drain ways, improper (steep) slopes across the majority of the landfill, and lack of proper surface water management devices. The landfill is inactive and the site is maintained by the West Virginia

Department of Environmental Protection, Landfill Closure Assistance Program (WVDEP, LCAP).

The landfill currently has a leachate surface impoundment that collects leachate from the landfill.

When the landfill was active, previous records show that a 2-acre liner system was installed along with a leachate collection system that conveys leachate to this impoundment. The WVDEP currently collects that leachate from the surface impoundment and transports it to the Cowen

Public Service District located at the intersection of State Routes 82 and 20.

The Contractor will be required to install a new leachate surface impoundment at the same location of the existing impoundment and install leachate transmission line system prior to beginning construction on the closure cap of the landfill in order to manage the existing leachate that is currently being generated at the site. It is the sole responsibility of the Contractor to manage the leachate at all times during construction.

The landfill and surrounding disturbed areas will be closed and reclaimed under this contract. The main site closure activities will include:

1. Construction of a leachate surface impoundment with leachate detection system.

Including leachate offload monitoring system and associated valving.

2. Construction of a leachate cutoff drain, leachate transmission line, and leachate seep collector drains.

3. Reconstruction of an existing leachate surface impoundment. The current liner system and valving will be removed or demolished. The new liner system will include two 60-mil liners with a leachate detection composite in between. This will lay on top of a geosynthetic clay liner and 12-inch soil layer with a permeability equal to or less than 1x10-6 cm/sec. A minimum vertical separation of 4 feet will

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page iii be required between the bottom of the constructed liner and the existing bedrock.

This vertical separation layer will consist of backfill material. (Section 18.0)

4. Construction of a permanent sediment pond including construction of principal and emergency spillways. The location of the sediment pond is located on bedrock.

The Contractor will be required to install a bentonite/soil liner to prevent the stormwater from entering the groundwater.

5. Construction of the final cap system including 6 inches of daily cover soil (where needed), 12 inches of intermediate soil cover, a geonet composite gas management layer, 40-mil VFPE geomembrane layer, geonet composite drainage layer, 24-inch protective soil cover layer, and passive gas vents.

6. Construction of cap drainage layer underdrains to collect water from the drainage layer of the cap.

7. Construction of drainage channels (run-on and run-off control) and culverts.

8. Improvement of existing landfill access roads.

9. Construct perimeter fences. To be barbed wire fencing including pipe gates around the perimeter of the landfill areas.

10. Revegetation of disturbed areas.

The Contractor will be responsible for purchase and installation of all required materials and supplies. The Contractor will also be responsible for completing construction quality assurance testing for certain aspects of construction.

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page iv

TABLE OF CONTENTS

PROJECT NARRATIVE................................................................................................................ ii

LIST OF DRAWINGS ................................................................................................................ xiii

1.0 GENERAL

1.1 Site Location

1.2 Definitions

1.3 Directions to the Site

1.4 Description of Problems

1.5 Purpose

1.6 Subsurface Information

2.0 SCOPE OF WORK

2.1 General

2.2 Supervision

2.3 Environmental Control

2.4 Site Plans

2.5 Additional Specifications

2.6 Proposed Construction Sequence

2.7 Health and Safety Plan

3.0 SITE ACCESS

4.0 INTERPRETATIONS

5.0 UTILITIES AND OTHER OBSTRUCTIONS

6.0 EQUIPMENT RESPONSIBILITY

7.0 TRAFFIC MAINTENANCE

8.0 LIMITING ACCESS

9.0 PROJECT CONTROL

10.0 DAMAGES

11.0 PERMITS AND LICENSES

12.0 PAYROLL

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page v

13.0 CONSTRUCTION LAYOUT

13.1 Description

13.2 Materials

13.3 Construction Methods

13.4 Method of Measurement

13.5 Basis of Payment

13.6 Pay Item

14.0 QUALITY CONTROL

14.1 Description

14.2 Materials

14.3 Construction Materials

14.4 Method of Measurement

14.5 Basis of Payment

14.6 Pay Item

15.0 MOBILIZATION AND DEMOBILIZATION

15.1 Description

15.2 Materials

15.3 Mobilization

15.4 Demobilization

15.5 Method of Measurement

15.6 Basis of Payment

15.7 Pay Item

16.0 SITE PREPARATION

16.1 Description

16.2 Materials

16.3 General Requirements

16.4 Clearing and Grubbing

16.5 Erosion and Sedimentation Control

16.6 Temporary Access Roads

16.7 Waste Cleanup

16.8 Method of Measurement

16.9 Basis of Payment

16.10 Pay Items

17.0 SITE DRAINAGE

17.1 Description

17.2 Materials

17.2.1 Grout Mixes

17.2.2 Riprap

17.2.3 Erosion Control Matting/Turf Reinforcement Matting

17.2.4 Corrugated HDPE Pipe

17.2.5 Sediment Pond Principal Spillway

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page vi

17.2.6 Sediment Pond Emergency Spillway

17.2.7 Geosynthetic Clay Liner

17.3 Construction Methods

17.3.1 Riprap Placement

17.3.2 Corrugated Plastic Pipe Installation

17.3.3 Principal Spillway Installation

17.3.4 Emergency Spillway Installation

17.3.5 Drainage Swales and Channels

17.3.6 Geosynthetic Clay Liner

17.4 Method of Measurement

17.5 Basis of Payment

17.6 Pay Items

18.0 EARTHWORK

18.1 Description

18.2 Material Definitions

18.3 Construction Methods

18.4 Excavation

18.5 Excavated Materials

18.6 Fill and Compaction

18.7 On-Site Rock Borrow for Drainage Ditch Riprap

18.8 Water Handling

18.9 Borrow Excavation

18.10 NEPA Compliance Schedule

18.11 Stone for Unpaved Access Roads

18.12 Final Shaping and Contouring

18.13 Leachate Pond Dewatering and Filling

18.14 Blasting

18.15 Method of Measurement

18.16 Basis of Payment

18.17 Pay Items

19.0 LEACHATE DRAINS

19.1 Description

19.2 General Requirements

19.3 Materials

19.3.1 Pipe

19.3.1.1 HDPE Pipe

19.3.2 Geotextile

19.3.3 Stone

19.3.4 Bedding and Backfill Material

19.3.5 Manholes

19.3.6 Guard Posts

19.4 Construction Methods

19.4.1 Trench Excavation

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page vii

19.4.2 Care and Handling of Pipe

19.4.3 Alignment and Grade of Pipe

19.4.4 Pipe Installation

19.4.5 Pipe Pressure Testing (For Solid Wall Piping)

19.4.6 Geotextile Placement

19.4.7 Pipe Bedding and Backfilling Trench

19.4.8 Gas Vent/Cleanouts and Cleanouts

19.4.9 Cast-in-place Manholes or Doghouse Manholes

19.5 Method of Measurement

19.6 Basis of Payment

19.7 Pay Items

20.0 FINAL COVER (CAP)

20.1 Description

20.2 General Requirements

20.3 Materials

20.3.1 Intermediate Soil Cover

20.3.2 Protective Cover Soil

20.3.3 Geonet Composite

20.3.4 VFPE Manufacturer Requirements

20.3.5 VFPE Textured Geomembrane Material Specifications

20.3.6 Cap Drainage Layer Underdrains

20.4 Construction Methods

20.4.1 Daily Cover Placement

20.4.2 Intermediate Cover Placement

20.4.3 Geonet Composite Placement

20.4.4 VFPE Geomembrane

20.4.5 VFPE Placement

20.4.6 VFPE Field Seaming

20.4.6.1 Test Seams

20.4.6.2 Non-Destructive Seam Testing

20.4.6.3 Destructive Seam Testing

20.4.7 VFPE Defects and Repairs

20.4.8 Cap Drainage Layer Underdrains

20.4.9 Pipe Penetrations

20.4.10 Damages

20.4.11 Placement of Protective Cover Soil Layer

20.5 Gas Vents

20.6 Method of Measurement

20.7 Basis of Payment

20.8 Pay Items

21.0 LEACHATE SURFACE IMPOUNDMENT

21.1 Description

21.2 General Requirements

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page viii

21.3 Materials

21.3.1 Soil Layer

21.3.2 Geosynthetic Clay Liner

21.3.3 60-Mil Textured HDPE Geomembrane

21.3.4 Leak Detection Drainage Composite

21.3.5 Stone

21.3.6 Geotextile

21.3.7 HDPE Pipe

21.3.8 Fencing

21.3.9 Stone Surfacing

21.4 Construction Method

21.4.1 Soil Layer

21.4.2 Geosynthetic Clay Liner

21.4.3 60-Mil HDPE Geomembrane

21.4.4 Leak Detection Drainage Composite

21.4.5 Stone

21.4.6 Geotextile

21.4.7 Leak Detection Piping

21.4.8 Protective Cover

21.4.9 Leachate Collection Pipe

21.4.10 Anchor Trench

21.4.11 Groundwater Seep Collector Underdrains

21.4.12 Fencing

21.5 Method of Measurement

21.6 Basis of Payment

21.7 Pay Item

22.0 IMPOUNDMENT HDPE GEOMEMBRANE

22.1 General

22.2 Materials

22.2.1 Manufacturer Requirements

22.2.2 HDPE Geomembrane Material Specifications

22.3 Methods

22.3.1 Delivery and Storage

22.3.2 Placement

22.3.3 Field Seaming

22.3.3.1 Test Seams

22.3.3.2 Non-Destructive Seam Testing

22.3.3.3 Destructive Seam Testing

22.3.4 Defects and Repairs

22.3.5 Pipe Penetrations

22.3.6 Damages

23.0 ACCESS ROAD CONSTRUCTION

23.1 Description

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23.2 General Requirements

23.3 Materials

23.3.1 Geotextile

23.3.2 Stone

23.3.3 Fencing

23.4 Methods

23.5 Method of Measurement

23.6 Basis of Payment

23.7 Pay Item

24.0 REVEGETATION

24.1 Description

24.2 General Requirements

24.3 Materials

24.3.1 Soil Cover

24.3.2 Fertilizer

24.3.3 Limestone

24.3.4 Seed Mixtures

24.3.4.1 Temporary Seed Mixture

24.3.4.2 Permanent Seed Mixture

24.3.5 Mulch

24.3.5.1 Straw

24.3.5.2 Wood Cellulose Fiber

24.3.5.3 Wood/Bark Chips

24.3.6 Water

24.4 Seedbed Preparation

24.5 Seeding

24.6 Maintenance of Seeded Areas

24.7 Second Step Seeding

24.8 Method of Measurement

24.9 Basis of Payment

24.10 Pay Item

25.0 ADMINISTRATION

25.1 Description

25.2 Summary

25.3 Method of Measurement

25.3.1 Basis of Payment

25.3.2 Pay Item

26.0 BLASTING

26.1 General

26.2 Materials

26.3 Methods

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page x

27.0 LEACHATE LOADOUT VAULT AND DETECTION MANHOLE

27.1 Eccentric Plug Valves CL 125

27.1.1 General

27.1.2 Products

27.1.3 Execution

27.2 Electromagnetic Flowmeter

27.2.1 General

27.3 HDPE Pipe and Fittings

27.3.1 General

27.3.2 Products for 3 Inch and Smaller Pipe Per AWWA C901

27.3.3 Products For 4 Inch and Larger Pipe Per AWWA C906

27.3.4 Execution

27.4 Floor Vault Access Door

27.4.1 General

27.4.2 Products

27.4.3 Execution

27.5 Ultrasonic Level Transmitter

27.5.1 General

27.5.2 Products

27.5.3 Execution

27.6 Structural Precast Concrete

27.6.1 General

27.6.2 Products

27.6.3 Execution

27.7 Method of Measurement

27.8 Basis of Payment

27.9 Pay Item(s)

28.0 LEACHATE LOADOUT CONTROL SYSTEM

28.1 Detectable Tape

28.1.1 Description

28.1.2 Applicable Publications

28.1.3 Color Code

28.1.4 Installation

28.2 Electrical General Provisions

28.2.1 General

28.2.2 Product

28.2.3 Execution

28.3 Electrical Work Included

28.3.1 General

28.3.2 Products

28.3.3 Execution

28.4 Electrical Codes and Fees

28.4.1 General

28.4.2 Products

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28.4.3 Execution

28.5 Electrical Tests and Inspections

28.5.1 General

28.5.2 Products

28.5.3 Execution

28.6 Conduits

28.6.1 General

28.6.2 Products

28.6.3 Execution

28.7 Wire and Cable (600V and Below)

28.7.1 General

28.7.2 Products

28.7.3 Execution

28.8 Instrumentation Cable

28.8.1 General

28.8.2 Products

28.8.3 Execution

28.9 Communications Cable and Equipment

28.9.1 General

28.9.2 Products

28.9.3 Execution

28.10 Boxes and Plates

28.10.1 General

28.10.2 Products

28.10.3 Execution

28.11 Wiring Devices

28.11.1 General

28.11.2 Products

28.11.3 Execution

28.12 240-120 Volt Single Phase Panelboard

28.12.1 General

28.12.2 Products

28.12.3 Execution

28.13 Identification

28.13.1 General

28.13.2 Products

28.13.3 Execution

28.14 Grounding (Wired System)

28.14.1 General

28.14.2 Products

28.14.3 Execution

28.15 Instrumentation and Control System Requirements

28.15.1 General

28.15.2 Quality Assurance

28.15.3 Review and Progress Meetings

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page xii

28.15.4 Contractor Project Personnel

28.15.5 Submittals

28.15.6 Factory Testing

28.15.7 Field Startup, Commissioning, and Testing

28.15.8 Training

28.15.9 Equipment Delivery, Handling and Storage

28.15.10 General Design Requirements

28.16 Primary Sensors and Field Instruments

28.16.1 General

28.16.2 Products

28.16.3 Execution

28.17 Control Panels, Enclosures, and Panel Instruments

28.17.1 General

28.17.2 Products

28.17.3 Execution

28.18 Programmable Controller System

28.18.1 General

28.18.2 Products

28.18.3 Execution

28.19 Radio Telemetry

28.19.1 General

28.19.2 Products

28.19.3 Execution

28.20 Method of Measurement

28.21 Basis of Payment

28.22 Pay Item

APPENDICES

Contractor’s Bid Sheet ............................................................................................... APPENDIX A

List of Contractor QA/QC Requirements .................................................................. APPENDIX B

List of Required Submittals ....................................................................................... APPENDIX C

Test Pit Excavation Daily Logs and Photos ............................................................... APPENDIX D

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page xiii

LIST OF DRAWINGS

Drawing No. Title

1 Cover Sheet and Index

2 Existing Conditions

3 Overall Site Plan

4 Demolition Plan

5 Landfill Closure Plan

6 Landfill Closure Plan

7 Leachate Management Plan

P1 Proposed Channel Profiles

P2 Proposed Channel Profiles

P3 Leachate Collection Profiles

D1-D7 Miscellaneous Details

XS1-XS10 Baseline-A Cross Sections

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 1

TECHNICAL SPECIFICATIONS

Webster County Landfill Closure Project

1.0 GENERAL

1.1 Site Location

The problem site is located approximately 3.5 miles southwest of the Town of Webster Springs, West Virginia. The project area within the limits of construction encompasses approximately

20 acres. Site location maps are included on Drawing Nos. 4 and 5.

1.2 Definitions

The following definitions shall be used throughout these specifications:

“Addenda” - Written or graphic instruments issued prior to the opening of Bids which clarify, correct or change the Contract Documents. Also called addendum.

“Agreement” - The written Agreement between Owner and Contractor covering the Work to be performed. The term “Agreement” shall be synonymous with the term “Contract.”

“Bid” - The offer or proposal of the Bidder submitted on the prescribed form setting forth the prices for the Work to be performed.

“Bidder” - Any person, firm, or corporation submitting a Bid for the Work.

“Contract” or “Contract Documents” - All legal and technical writings plus Drawings for the

Construction including, but not limited to, technical specifications, Drawings, Contracts, contractor bid forms, bidding instructions, and written communications.

“Contractor” - Denotes the individual or organization that performs the Work. The Contractor shall provide all labor, materials, equipment, supervision, tools, services, and incidentals necessary to complete the contract in accordance with the Contract Documents.

“Drawings” - The approved documents or drawings, or exact reproductions of them, showing construction requirements for the project. The Drawings show the location, character, dimensions, and other details of the prescribed work including layouts, profiles, and cross sections; however, subsurface soil and geological data are excluded from this definition. The term “Drawings” shall be synonymous with the term “Plans.”

“Engineer” - The person and/or company responsible for the project design. The Engineer will review, and monitor the work as requested by the Owner. All questions or changes which may

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 2 affect the work shall be presented to the Engineer for review. For this project the Engineer is

Potesta & Associates, Inc.

“Landowner” - The owner of the property upon which the project is to be conducted. Also called property owner. For this project the landowner is the Webster County Solid Waste Authority. For off-site borrow sources, landowner refers to the particular property owners of the off-site borrow area. A portion of the project is located on private property. The Owner will obtain a right-of-entry for work on this private property, and the Contractor should confine all activities to the area within the limits of construction shown.

“Owner” - Denotes the individual or organization for which the work is being performed. In the case of this project, the Owner is West Virginia Department of Environmental Protection

(WVDEP). The Owner may delegate responsibilities to others in the performance of this work.

“Shop Drawings” - All drawings, diagrams, illustrations, brochures, schedules and other data which are prepared by the Contractor, a Subcontractor, manufacturer, supplier or distributor to substantiate the design, material or equipment for some portion of the Work.

“Specifications” - A part of the Contract Documents consisting of written descriptions of a technical nature of materials, equipment, construction systems, standards and workmanship.

“Subcontractor” - An individual, firm or corporation having a direct contract with Contractor or with any other Subcontractor for the performance of a part of the Work.

“Work” - All materials, equipment, services, facilities and other related items necessary to produce the construction required by the Contract Documents and all supplies incorporated or to be incorporated in the Work.

1.3 Directions to the Site

Directions to the site from the Town of Cowen: Head northeast on State Route 20 through town, follow State Route 20 for 6.9 miles, turn left onto Price Run Road, continue on Price Run Road

(County Route 36) for 1.0 mile, at the 4-way intersection turn right onto Excelsior Pleasant Ridge

Road (County Route 40), continue on this road for 1.0 mile and the entrance to the landfill will be on the left.

1.4 Description of Problems

The Webster County Landfill Closure Project area includes an inactive solid waste landfill and related facilities including a leachate surface impoundment, groundwater monitoring wells, and other miscellaneous items associated with the landfill.

The landfill and problem areas are located on two parcels of land a 14.87-acre parcel and a

0.03-acre parcel, both owned by the Webster County Solid Waste Authority. The deed and legal

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 3 description of the parcels may be found in Deed Book 256, Page No. 623 of record in the Office of the Clerk of the County Commission of Webster County, West Virginia.

The problems with the site include the following:

1. Run-on and run-off control channels are largely missing from around the landfill.

2. The landfill has not been capped with a Department of Environmental Protection regulation cap. A final cap is required over the landfill.

3. The existing leachate pond is not in accordance with the standards for leachate storage surface impoundments.

4. Gas management devices are lacking.

1.5 Purpose

The purpose of this construction contract is to complete closure of the site in accordance with the

Title 33, Series 1 Solid Waste Management Rules. The following main aspects of site closure are included in this contract.

1. Construction of a sediment control pond including principal and emergency spillways.

2. Improvement and extension of existing access roads.

3. Construction of a leachate surface impoundment with leachate detection system.

Including leachate offload monitoring system and associated valving.

4. Construction of run-on and run-off control channels and installation of culverts.

5. Construction of a leachate cutoff drain, leachate transmission line, and leachate seep collector drains to collect and convey leachate from the landfill to the leachate surface impoundment including a leachate offload area for removal of leachate from the site. The Contractor will be responsible for managing leachate during construction.

6. Regrading of the landfill area to acceptable slopes for cap placement.

7. Construction of a final cap over the landfill area including 6 inches of daily cover soil, 12 inches of intermediate soil cover, composite gas management layer, flexible membrane cap, composite drainage layer, and 24-inch protective soil cover layer.

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 4

8. Construction of a passive gas venting system.

9. Revegetation of the landfill area and on-site and off-site borrow areas utilized by the Contractor.

1.6 Subsurface Information

A subsurface exploration was completed on the landfill property including test pit locations, photos, and summary of results.

POTESTA excavated 34 test pits within and adjacent to the disposal area to provide information on the approximate edge of solid waste and to determine thickness of soil cover over the waste.

Test Pits TP-1 through TP-32 (except for TP-12, and TP-20 through 26) were excavated to try and locate the approximate edge of waste. Test Pits TP-20 through TP-26 were excavated within the landfill area to determine the thickness of soil cover over waste. Test Pits TP-12, TP-33, and

TP-34 were outside of the expected landfill but did contain some solid waste. Test pits were excavated during January 2019. The Existing Conditions Drawing shows the approximate location of the test pits.

Test Pits excavated along the edge of the landfill indicated that the soil cover thickness along the edge of the landfill varies from a minimum measured thickness of 12 inches to a maximum measured thickness of 5 feet.

Test Pits in top of the landfill indicated that the soil cover thickness varies from a minimum measured thickness of 12 inches to maximum measured thickness of 3 feet. Generally, the soils existing as cover are medium to dark to light brown sandy/silty clay with medium to large rock fragments. Based on the test pit excavations, the existing soil cover over the landfill is adequate to meet the 6-inch thick daily soil cover requirement of the Solid Waste Management Rules.

POTESTA excavated five test pits (SB-1 through SB-5) to identify and characterize potential soil borrow areas. Test pits were limited to areas near the landfill located on the adjacent property.

Test pit locations are shown on the Existing Conditions Drawing. The soil depths ranged from

1 to 7 feet of soil depth.

Bidders should realize that soil, waste, and other subsurface conditions at the site may vary significantly from the conditions depicted on the test pit logs. The landfill was a manmade structure and as such, it is anticipated that conditions within and around the landfill could vary widely. This could include the amount of soil, amount of waste, degree of saturation, soil and/or rock characteristics, depths of materials, etc.

Test Pit Excavation Daily Logs and Photographs are in Appendix D.

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 5

2.0 SCOPE OF WORK

2.1 General

The work covered by these Specifications consists of furnishing all supervision, labor, plants, power, equipment, and performing all operations in connection with this project. The project work includes, but is not limited to, installation of temporary shoring and fencing as required to protect workers and to restrict the access to the site; collection and covering/disposal of debris;

construction of leachate collection systems (leachate cutoff drain, leachate transmission line, and leachate seep collector drains); installation of leachate surface impoundment and ancillary facilities; closure of the existing leachate pond; construction of a new sediment pond including primary and emergency spillways; construction of drainage channels; regrading of existing waste, soil cover, and impacted material including excavation and filling as required to obtain appropriate final grades; construction of a final cap for the landfill including daily cover, intermediate cover, gas management composite, flexible membrane cap, drainage layer composite, and final soil cover;

installation of passive gas vents; improvement of a landfill access road; construction of culverts;

construction of fences; construction of leachate offload monitoring system; and revegetation of disturbed areas. The purchase and delivery of materials to the site will be the responsibility of the

Contractor unless otherwise specified.

2.2 Supervision

Except where the Contractor is an individual and gives his personal superintendence to the work, the Contractor shall provide a competent superintendent satisfactory to the Owner (West Virginia

Department of Environmental Protection or their designated representative) on the work site at all times during working hours with full authority to act for the Contractor.

2.3 Environmental Control

The Contractor shall conduct all work to minimize the amount of dust, erosion, and damage to local flora and fauna. Contractor shall be responsible for providing a water truck to control dust, at no additional cost to Owner. General site cleanup shall be performed upon the completion of work and/or on a daily basis as determined by the Owner. The project area shall be kept clean of all rubbish and debris resulting from the work. All barrels, cans, drums, rubbish, waste, or other debris shall be disposed in an approved landfill or other appropriate location.

2.4 Site Plans

All of the Drawings in the List of Drawings are part of this Specification and are included separately.

2.5 Additional Specifications

West Virginia Division of Highways’ publications entitled “Standard Specifications, Roads and

Bridges” issued 2000, “Supplemental Specifications” latest revision, and “Standard Details Book, Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 6

Volume 1, Drainage, Guardrail, Pavement, Fence and Markers” latest revision, are incorporated by reference. These publications are referred to as WVDOH in the text. Also incorporated by reference are the latest revisions of the American Society of Testing and Materials (ASTM)

Standards, and the American Association of State Highway and Transportation Officials

(AASHTO) Standards.

2.6 Proposed Construction Sequence

The proposed construction sequence (major steps only) for this project is outlined below. The

Contractor may perform the construction in another sequence with the prior approval of the

Engineer and Owner.

1. Approval from WVDEP to begin work.

2. Mobilization and project start-up. Obtain required samples for testing and begin required lab tests. Submit shop drawings, material certifications, and other required information.

3. Install temporary erosion control (silt barriers) downgradient of work areas. Clear and grub all work areas, as needed. Remove and stockpile topsoil material from within landfill limits.

4. Manage the existing leachate at the site, begin construction of the new leachate surface impoundment, and leachate loadout and monitoring system.

5. Construct the new sediment pond.

6. Begin regrading of landfill to acceptable grades for cap placement.

7. Construct the leachate cutoff drains and leachate collection line to the leachate surface impoundment. Construction of leachate cutoff drains and collection line gas vents.

8. Smooth grade the landfill surface to prepare the subgrade (waste) and verify 6 inches of daily cover prior to placing intermediate cover, where applicable. Place

12 inches of intermediate cover over the area to receive the cap.

9. Construct the geosynthetic layers of the cap system including the composite gas management layer, the flexible membrane cap, and the composite drainage layer.

10. Construct the 24-inch soil cover layer over the cap.

11. Construct run-on and run-off control channels and associated culverts.

12. Construct perimeter fences.

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13. Construct the improvements to the existing access roads.

14. Revegetate disturbed areas.

Construction activities may require a phased approach including a division of Work into smaller subareas to facilitate placement and protection of the various components of the final cap and related facilities. Portions of certain work may also need to be performed concurrently.

2.7 Health and Safety Plan

The Contractor shall be required to prepare a Health and Safety Plan addressing his proposed work plan at the site. The Health and Safety Plan will be presented to the Owner prior to commencing work and shall be revised when so directed by the Owner. The Contractor’s Health and Safety

Plan shall address excavation, hauling, and transportation of waste, emergency response plan, confined space entry, monitoring for explosive conditions, monitoring of workers’ health and safety, workers’ protective precautions, and any other items as requested by the Owner.

3.0 SITE ACCESS

It is the Contractor’s responsibility to determine how he will access the site and obtain what permits and/or rights-of-entry may be required. The West Virginia Department of Environmental

Protection (WVDEP) has obtained rights-of-entry on only those parcels shown on the Drawings within the limits of construction. The landfill property is owned by Webster County Solid Waste

Authority. If the Contractor requires additional rights-of-entry, it will be the Contractor’s responsibility to obtain them. In the right-of-entry agreements between the Contractor and landowner, the landowner shall hold the WVDEP harmless from any injury or damages whatsoever resulting from the use of the property. The Contractor shall hold the WVDEP harmless for any damage to public or private property. All proposed routes of access shall be subject to the approval of the Owner and shall be constructed as outlined in Section 16.6, “Temporary Access

Roads” and as approved by the property owner. The Contractor shall be responsible for removing and replacing any fences necessary for access to the work areas, and providing any temporary fencing required, all at his own expense.

4.0 INTERPRETATIONS

The Contractor shall make interpretations of the surface and subsurface conditions which may affect methods or costs of the execution of work. Note that the project includes earthwork of materials placed as part of historical and filling operations. Subsurface conditions could be highly variable. All prospective Contractors shall obtain their own permission from the landowner for subsurface explorations, samplings, tests, etc. The Contractor herein agrees to make no claim for damage or compensation should the Contractor find conditions during the progress of the work different from those calculated or anticipated. The estimated number of units shown on the

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Contractor’s Bid Sheet (Appendix A) are for bidding purposes only. The actual quantities may vary from those shown. The Contractor is responsible for verifying these quantities and bringing any discrepancies to the attention of the WVDEP a minimum of three days prior to the submittal of the bid.

5.0 UTILITIES AND OTHER OBSTRUCTIONS

It shall be the sole responsibility of the Contractor to contact Miss Utility of West Virginia 48 hours prior to excavation and, to locate and avoid all utilities, facilities and other structures and obstructions. For that purpose, the Contractor shall employ all necessary precautions and methods to insure avoidance of and damage to such conditions. In the event such damage does occur, the

Contractor shall notify the affected utility owner and the Engineer immediately, make or have made all necessary repairs, and bear the expense of repairs for the damage thereof and any resulting damage caused thereby. The Contractor is required to submit a list of all utilities contacted to the

Owner before commencing work. If utility relocations not specifically covered by these documents are necessary, as determined by the Owner, the Contractor shall be reimbursed for the relocation per utility company invoice. The Contractor shall first submit a written cost estimate for all utility relocations required to the Owner for approval prior to performing or arranging for any utility relocation. If the Contractor encounters any underground utilities not shown on the

Drawings, the Contractor shall not disturb the utility and shall notify the Owner immediately for determination of subsequent actions.

6.0 EQUIPMENT RESPONSIBILITY

Equipment shall be in satisfactory operating condition and be capable of safely and efficiently performing the work required. Qualified operating personnel shall be provided by the Contractor for the operation of this equipment. The Contractor shall furnish and install, at the Contractor’s own expense, all fuel, oil, grease, cables, repair parts, tools and all other miscellaneous supplies and parts necessary for the efficient operation of each unit. In the event that equipment required to complete the on-going work is inoperable the Contractor at his expense is required to repair or replace the inoperable equipment within 48 hours. Contractor is responsible for cleaning up all spilled fuels and oils. Contractor must provide appropriate secondary containment for all petroleum products and antifreeze temporarily stored at the site.

7.0 TRAFFIC MAINTENANCE

The Contractor shall maintain traffic in accordance with the West Virginia Division of Highways’

“Standard Specifications, Roads and Bridges” issued 2000, “Supplemental Specifications” latest revision, and the West Virginia Division of Highways’ manual entitled “Traffic Control for Street and Highway Construction and Maintenance Operations” latest revision. Traffic control is considered incidental to this project.

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8.0 LIMITING ACCESS

The Contractor shall limit access to his work areas.

Two keys to the access gate shall be provided to the Contractor. The gate shall be locked after work each day.

Maintaining and limiting access, as specified, shall be considered incidental to the project.

9.0 PROJECT CONTROL

The Owner reserves the right to control and direct all facets of the project. However, such control does not relieve the Contractor of the sole responsibility for site safety and the proper completion of the Work.

10.0 DAMAGES

The Contractor shall be responsible for all damage to public or private property or facility, regardless of location or character, which may be caused by moving, hauling or otherwise transporting equipment, materials, or workers to or from any part of the work site, whether by him or his subcontractors, or as a result of performing the Work. This will include any damage to the access road (paved or unpaved) leading to the landfill. The Contractor shall make satisfactory and acceptable arrangement with the owner of, or the agency or authority having jurisdiction over, the damaged property or facility concerning its repair or replacement or payment of costs incurred in connection with said damage. All things damaged in connection with the performance of the

Contract shall be restored to their original condition or better as determined and approved by the

Engineer, and/or property owner.

11.0 PERMITS AND LICENSES

For off-site borrow and waste areas, the Contractor shall be responsible for obtaining National

Environmental Protection Act (NEPA) compliance.

If a highway occupancy permit is required for this work, it should be obtained at least 15 days prior to starting work. The Contractor shall be responsible for obtaining the permit and for payment of associated fees.

An NPDES Stormwater Construction Permit will be required for unpermitted offsite borrow area.

Should the Contractor elect to use an off-site borrow area, the Contractor shall be responsible for preparing, submitting, and obtaining WVDEP approval of a permit modification to cover off-site activities.

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It is the Contractor’s responsibility to obtain all the necessary permits and licenses required for the project, and to pay any fees necessary for obtaining the same. A copy of all required permits shall be submitted to the Owner before commencing work.

12.0 PAYROLL

The Contractor shall submit certified copies of payroll with each Application for Payment to the

Owner.

13.0 CONSTRUCTION LAYOUT

13.1 Description

This item consists of furnishing, placing, replacing and maintaining construction layout stakes, baseline stations, primary control points and any disturbed property location monuments as necessary for the proper performance of the work under this contract. It further consists of determining the exact units of measure for payment. It also consists of checking and making any field adjustments to the plan grades and elevations that may be necessary due to the inconsistency in material characteristics or differences between the cross sections taken from the topographic mapping and actual field conditions.

Special Note on Waste Settlement: Since the majority of work will occur over solid waste the

Contractor shall be aware that some settlement may occur. Engineer will review Contractor’s cross sections prior to starting work. Owner reserves the right to adjust grades as needed as the result of settlement.

Additionally, this item also includes the following:

1. Surveyed cross sections along the project baseline showing the existing ground surface, and the proposed final earthwork subgrade after the completion of excavation and fill required to relocate waste and prior to beginning placement of intermediate soil cover.

2. Establishment of a 50-foot grid over the area to receive the cap. Elevations will be surveyed at each grid line intersection to represent:

a. The existing ground surface after the daily cover (existing or placed by

Contractor) is smooth graded,

b. The resulting ground surface upon placement of the 12-inch intermediate cover layer, and 6-inch daily cover, and

c. The resulting ground surface upon placement of the 2-foot final soil cover layer.

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The grid surveys will be used to document layer thickness. Survey data shall be submitted and approved prior to placing the next layer.

3. Surveyed locations and elevations for the leachate cutoff drains, the leachate transmission line, leachate seep collector drains, centerline of all drainage channels, the edge of the final cap, edge of final liner, gas vents, cleanouts, fences, gates, access roads, cap underdrains, culverts, leachate tanks or impoundments, pump stations, electric line, sewer line, valves, etc. These drawings shall serve as record drawings for the as-constructed closure plan and shall be appropriately labeled to serve as documentation. These drawings will also be used to measure the final constructed quantities for measurement and payment.

The survey results shall be presented both on drawings at the same scale as shown on the construction drawings and an electronic copy in AutoCAD 2008 (or newer version of AutoCAD) shall be provided.

13.2 Materials

Conventional survey stakes, flagging, drafting media, etc.

13.3 Construction Methods

The Drawings show survey benchmark locations and the proposed plan views, profiles, and cross sections include information with which to layout the work. The Contractor shall make all calculations involved and shall furnish and place all layout stakes.

The Contractor shall provide a field work force and shall set all additional stakes needed, such as offset stakes, reference point stakes, slope stakes, grade stakes, stakes for drainage or other structures, supplementary bench marks, and any other horizontal or vertical controls necessary to secure a correct layout of the work. The Contractor shall be responsible for having the layout staking work conform to the lines, grades, elevations, and dimensions called for on the Drawings.

The Contractor shall furnish a copy of his survey records for checking to the Owner and for the permanent file. These records shall be furnished as they are completed during the progress of the work. Any review or checking of the Contractor’s layout by the Owner and the acceptance of all or any part of it shall not relieve the Contractor of his responsibility to secure the proper dimensions, grades, and elevations.

The Contractor shall exercise care in the preservation of existing stakes and bench marks and shall have them reset at his expense when any are damaged, lost, displaced, or removed. The Contractor shall use primary control points for reestablishing baseline stations wherever previously surveyed stations have been destroyed or removed. At a minimum, the Contractor shall confirm the location of existing baseline stations by field survey of each station’s relationship to a suitable primary control point. Should any discrepancies be found, primary control points shall supersede any existing baseline stations.

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All survey layout stakes set on the final cap shall be shortened a sufficient length to prevent penetration of the synthetic cap and drainage composite. The Contractor is responsible for any damage to the completed cap from surveying and construction layout.

The Contractor shall use competent personnel and suitable equipment for the layout work required and shall provide that it be done under the supervision of a West Virginia Professional Surveyor.

The Contractor shall provide the Owner existing ground line cross sections and survey notes for acceptance prior to any earthwork activities and as-built ground line cross sections and survey notes as soon as practical after the completion of excavation and fill. Failure to do so could either preclude any future alternation to the total amount bid for earthwork and/or retard the final installment payment for earthwork.

Acceptable cross sections shall be drawn or reproduced onto a CAD file and printed copy at the appropriate scale so that they may be directly overlaid on those cross sections contained in the

Drawings. Each 24-inch by 36-inch sheet shall be lightly gridded. Station numbers, elevations, baseline offset distances, cross section lines and types, date, responsible parties and a legend shall be clearly illustrated. Cross sections which do not encompass all areas of both earthwork excavation and fill placement shall be considered incomplete without exception.

All survey notes, calculations, sections, plans, or other documents produced pursuant hereto shall be certified as correct by a West Virginia Professional Surveyor.

The Owner shall be allotted sufficient time to reasonably review submitted cross sections and investigate any and all discrepancies, throughout the course of construction. Unacceptable and/or incomplete cross sections shall be returned to the Contractor for necessary revision. No earthwork, nor any other directly related work item, shall be initiated prior to the Owner’s acceptance of a complete set of preconstruction cross sections. Costs incurred by the Contractor from the delay of any construction activities required by the Owner to recover, review, and investigate project cross sections as described herein shall be the sole responsibility of the Contractor.

“As-built” drawings shall be provided to the Owner prior to the Final Inspection Meeting.

13.4 Method of Measurement

The method of measurement for determining the quantity of work done as described above will be on a lump sum basis.

13.5 Basis of Payment

The quantity of work done will be paid at the Contract lump sum price bid. Price and payment shall be full compensation for doing all the work herein described in a workmanlike manner, including the furnishing of all labor, materials, tools, equipment, supplies, and incidentals as necessary to complete the work. Payment shall also include furnishing, setting, maintaining and

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 13 resetting survey stakes, when necessary, and for providing the Owner cross sections and “as-built” drawings as described herein. The amount shall not exceed 5 percent of the total amount bid for the project.

No deduction will be made nor will any increase be made, in the lump sum construction layout item amount regardless of decreases or increases in the final total contract amount or for any other cause.

13.6 Pay Item

Item 13.0, “Construction Layout,” per lump sum. Cannot be more than 5 percent of the total amount bid for the project.

14.0 QUALITY CONTROL

14.1 Description

This work shall consist of testing for verification that the materials supplied and the work performed are in accordance with these Specifications. Appendix B presents a list of quality assurance/quality control (QA/QC) requirements to be performed by the Contractor. This list may not be all-inclusive. The Contractor shall comply with the requirements of the specifications and all directives from the owner relative to QA/QC requirements. The Contractor shall be required to make certain submittals to the Owner as specified herein. Appendix C presents a list of required

Contractor submittals. The list may not be all-inclusive. The Contractor shall comply with the requirements of the specifications and all directives from the Owner.

14.2 Materials

As required to procure samples and perform required testing.

14.3 Construction Materials

The Contractor shall furnish the services of his own testing laboratory or select an independent testing laboratory, as long as the laboratory is under the direct supervision of a Registered

Professional Engineer. The laboratory must be approved by the Owner.

Testing for strength, slump, compaction, grain size analysis, aggregate, rock, soils, nutrient and lime requirements, hydrostatic leak testing, geosynthetic materials testing, etc., shall be performed as required by these Specifications or as ordered by the Owner in writing. The Owner will determine the need, locations, extent, and time of any testing herein specified or in addition to that which is herein specified.

The Contractor shall be responsible to perform laboratory tests of the various fill materials (soils) to identify the Standard Proctor density. A copy of the soil laboratory testing summary sheet shall

Webster County Landfill Closure Technical Specifications (0101-17-0380-006), December 5, 2019 Page 14 be supplied to the Owner’s representative for review and approval prior to placement of all material. If, in the opinion of the Owner, the Proctor density has changed, a retest will be required.

The fill materials shall be compacted to 95 percent of their Standard Proctor density unless otherwise required by these Specifications. Field density tests shall be performed by the

Contractor or a qualified third party testing laboratory acceptable to the Owner in accordance with the Specifications. All Proctor tests shall be submitted to the Owner for approval prior to compacting the fill and after fill compaction to verify that the compaction criteria is obtained.

Field density test results shall also be provided to the Owner as they are completed during the progress of the Work.

The Contractor is required to submit and perform required geosynthetic quality control testing of materials prior to shipment to the site. The Contractor shall also be required to perform quality assurance testing during installation of geosynthetic materials.

Only first-class materials conforming to the requirements of the Specifications shall be incorporated into the work. All materials shall be accepted by the Owner prior to use in this project. The Contractor shall furnish a written statement of the origin, composition, and manufacturer of any or all materials (manufactured, produced, or grown) that are to be used in the work.