23_237_ADD1_2.pdf

BID PROPOSAL

Deans Bridge Road MSW Landfill Phase 3

Gas Collection and Control System Expansion

The following prices are hereby given by the Bidder for each Item herein below delineated to be used for the dual purpose of: a) arriving at an estimated total Bid Price; and b) establishing price factors to be utilized in adjustments to the estimated total price resulting from change orders issued in accordance with these Contract Documents. Said total price being the City's guide to the qualified low Bidder. An incomplete Bid Form shall be considered non-responsive.

Estimated Item No. Description Unit Quantity Unit Price Amount

001 Mobilization/Demobilization LS 1 002 Project Survey LS 1 .

003 Drilling Rig Platform EA 30 .

004 36-incb Diameter Bore with 8-inch Diameter VF 2,450 HDPE SDR 11 Casin2

005 Boring Refusal VF 120 006 LFG Well Abandonment EA 7

007 12-incb BDPE SDR 17 Pipe in LFG LF 940 Header/Lateral Trench

8-incb HDPE SDR 17 Pipe in LFG Lateral LF 910 Trench

009 6-inch HDPE SDR 17 Pipe i~ LFG Lateral LF 6,060 Trench

010 24-inch HP Storm Casing for Road Cr:c:i~sing __ LF 60

011 4-inch BDPE SDR 11 Liquid Conveyance Line LF 6,020 in Common Trench

4-inch HDPE SDR 11 Liquid Conveyance Line LF 1,320 in Separate Trench

2-inch BDPE SDR 9 Air Supply Line in LF 6,020 Common Trench

014 12-inch Header Isolation Valve E,A 1 015 2-inch Air Line Isolation/ Blowoff Valve EA 2

4-inch Air Release Valve in Liquid Conveyance EA 1 Line

017 4-inch Liquid Conveyance Line Cleanout EA 2 018 12-inch BDPE SDR 17 Header Access Riser EA 2 019 LFG Wellheads EA 60

4-inch Liquid Conveyance stub-up Pump EA 31 Discharee Manifold

021 2-inch Air Supply Stub-up Valve Fittings EA 31

Gas Extraction Well Pumps Supplied and EA 31 Installed

Nylon Tubing and Pump Support Rope for Gas LF 2,300 Well Pumps

024 18-inch HP Storm Casing for Road Crossing LF 180

Seeding and Erosion Control Matting Side SY 61,533 Slooes

026 Tie-in to Existing 10-inch Header EA 7

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

039A

039B·

Deans Bridge Road MSW Landfill Phase 3

Cias ColJectlon and Control System Expansion

Tie-in to Existing 6-inch Lateral/Riser EA 6 Tie-in to Existing 4-inch Lateral/Riser EA 4 Tie-in to Existing 6-inch Lateral Riser at Well EA 7 to be Abandoned Tie-in to Existing 2-inch Air Supply Line at EA 7 Well to be Abandoned Tie-in to Existing 4-inch. Liquid Conveyance EA 7 Line at Well to be Abandoned 8-inch Header Isolation Valve EA 1 6-inch or 8-inch BDPE SDR 17 Landfill Gas LF 310 Laterai Pipe in Deeoer Trench of 5-8 ft 4-inch Liquid Conveyance Line Isolation Valve EA l with Vault Box I

12-inch BP Storm/Corrugated Casing for LF 420 Slope/Horizontal Collector Hourly Rate for Well Drilling mt l Standby Tune During Drilling Work HR 1 Standby Time During GC~S Construction HR 1 6-inch BDPE SDRl 7 Perforated Pipe for Slope LF 2,340 Collector and Horizontal Collector Trench 6-inch HDPE SDRl 7 Perforated Pipe for Slope LF 1,270 Collector (SooPlv Material) 4-inch HDPE SDR 17 Pipe for Slope Collector LF 1,270 6-incb HDPE SDRl 7 Perforated Pipe for Toe LF 2,040 Collector 12-inch HDPE SDR 17 Sump for Horizontal EA 1 CoUector 8-inch HDPE SDR 17 Leachate aeanout Riser EA 5 Tie-in Tie-in to Existing 6-inch x 3--inch Dual EA 1 Contained Forcem.ain

SUBTOTAL BJ;I) COST

FOl!CE ACCOUNT $400,000.00

TOTAL BID COST

Mobilization/Demobilization: Shall include any work without a specific pay item such as:

removal and disposal of all miscellaneous items ( i.e. demolition items), shall be included in the item of mobilization/demobilization, unless otherwise established as separate contract items. The items of mobilization/demobilization shall also include other miscellaneous items of construction not otherwise shown as a separate pay item such as general clearing, cut and fill, construction layout, the hauling and disposal of undesirable or surplus materials, bonds and insurance etc. Unless noted in bid proposal includes Erosion Control (temporary & permanent grassing);

*"""LS (Lump Sum} - For all Lump Sum Items, attach itemized break of lump sum amount on separate sheet

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Deans Bridge Road Municipal Solid Waste Landfill 2023 Gas Collection and Control System Expansion

Technical Specifications

Augusta Engineering and Environmental Services Department 4330 Deans Bridge Rd Blythe, Georgia 30805

SC S EN.GIN EE RS

09221050.23 I September 26, 2023

3175 Satellite Blvd building 600 suite 100, Duluth, GA 30096

(678) 319-9849

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Table of Contents

Technical Specifications

011000 0120 00 012010 013010 014000 015030 017030 02 4116 3120 00 32 90 00 32 90 20 33 21 70 33 2180 33 5110 33 50 20

Summary of Work Measurement and Payment Project Meetings Contractor Submittals Quality Control Protection of Existing Facilities Project Record Documents Refuse Handling, Storage, and Disposal Excavating, Trenching, Backfilling and Grading Seeding and Sodding Environmental Assessment LFG Extraction Wells and Wellheads Landfill Gas Collection System Appurtenances Pipe and Pipe Fittings Header Isolation Valve

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

SECTION 0110 00

SUMMARY OF WORK

PART 1 -GENERAL

1.01 PROJECT DESCRIPTION

A. The project work to be performed by the Contractor consists of furnishing all labor, materials, equipment, tools, transportation, services, incidentals, and performing all work necessary to complete the project, in place and ready for service in accordance with the Plans and Specifications prepared therefore and entitled "Deans Bride Road Municipal Solid Waste (MSW) Landfill 2023 Gas Collection and Control System (GCCS) Expansion". The work generally includes but is not limited to the following items:

1. Construction staking/system layout/surveying prior to construction.

2. Installing below grade high-density polyethylene (HDPE) landfill gas (LFG) extraction wells.

3. Installing below grade high-density polyethylene (HDPE) LFG laterals and header, air supply line, and liquid conveyance line.

4. Installing header isolation valve, airline isolation valves, and liquid conveyance line isolation valves, cleanouts, and air release valves.

5. Installing gas wellheads, including fittings, valves, tubing, hoses, clamps, regulators and filters, and related appurtenances.

6. Installing new pumps, including tubing, clamps, and related appurtenances.

7. LFG well abandonments.

8. Abandonment in-place of limited sections of the existing GCCS.

9. Connection of the GCCS Expansion to the existing GCCS.

10. System start-up and testing

11. Conformance surveying

12. Providing as-built documentation (record drawings)

1.02 CONTRACTOR QUALIFICATIONS

The Successful Contractor on this project shall be required to perform a minimum of 50% of the work (labor) on this project. All landfill GCCS Work must be performed by a

Augusta Engineering and Environmental Services Department Deans Bride Road MSW LandfiU 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Georgia licensed and registered General Contractor with a minimum of 3 years' experience in construction and installation of landfill GCCS, which has successfully installed the specific product herein for at least 3 projects in the past 5 years of similar size and function. Included with each bid shall be a list of the 3 similar projects performed within the past 5 years that demonstrates the minimum experience requirement. The information included for each project submitted shall be the following:

1. Project name and description of scope of work

2. Project year

3. Owner

4. Project contact with telephone number

5. Amount of material installed

6. Amount of work in dollars

1.03 WORK SEQUENCE

Construction work is to be sequenced to accommodate work with any other contractors on site or the Owner's forces. Work shall be sequenced so that no existing vertical extraction wells, or sections of the GCCS, are taken offline for an extended period (more than 4 hours) at any time during the Work. Contractor is to install new sections of GCCS prior to disconnecting those limited sections indicated in the Contract Drawings for removal. The proposed GCCS expansion shown within the footprint of Cell 3A shall be brought online for monitoring by January 15, 2024.

1.04 CONTRACTOR USE OF PREMISES

A. Limit use of premises for work, storage, and access to allow work by other contractors, owner occupancy, and normal landfill operations.

B. Work Days: As detailed in the Owner's specifications, allowable work times shall be Monday through Saturday from 7:00 a.m. to 5:00 p.m., excluding Sundays and Facility observed Holidays. Contractor shall request in writing to the Facility 48 hours' prior to Sunday or Facility observed Holidays to work.

C. Access: No later than 10 days after notice to proceed, the Contractor shall arrange with the Owner a sequence of procedures, means of access, space for storage of materials and equipment, and use of approaches and roadways.

Contractor's use of the premises shall be confined to the areas approved by the Owner.

D. Smoking: Smoking is prohibited at the Deans Bride Road Landfill.

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

E. Contractor shall not dispose any refuse on site without approval of the Owner and in accordance with Section 02 41 16, Refuse Handling, Storage, and Disposal.

F. Contractor shall coordinate with the Owner for available area to locate Contractor's trailer. Non-potable water, septic tank, and electrical services are already available. If using the electrical service, the Contractor is respon~ible for coordinating with the electric company for any connections and pay for electrical services at no additional cost to the Owner.

1.05 OWNER OCCUPANCY AND LANDFILL OPERATIONS

The Contractor shall cooperate with the Owner during construction operations to minimize conflicts with the Owner's work and facilitate the Owner's usage. The Contractor shall perform the work so as not to interfere with the Owner's operations, maintenance, environmental monitoring, and any other of the Owner's activities at the site.

1.06 SITE CONDITIONS

A. Existing Grades: The existing grades may vary from those indicated on the Plans due to landfill settlement and ongoing filling operations.

B. Existing Features: The Contract Documents require the Contractor to field verify the location of existing features. Existing features include but may not be limited to the following: stormwater drainage struc~es and underground pipes, stormwater terraces and swales, leachate collection system cleanouts, sumps, pump stations, electrical panels, forcemain, utilities, roads, guardrails, drainage culverts, monitoring wells and piezonieters, fences, and buildings.

C. The Contractor shall enforce safety procedures to minimize hazards to workers, the public, and the environment.

1.07 ERRORS AND/OR OMISSIONS IN PLANS AND SPECIFICATIONS

The intent of the Specifications is to outline or indicate the items of work, or both, which cannot be readily shown on the Drawings and, further to indicate the types and qualities of materials. Drawings and specifications shall be considered as being complimentary and items or work mentioned or indicated in one and not in the other shall be included as if mentioned in both. Should Drawings disagree in themselves or with the Specifications the better quality or greater quantity of work or materials shall be estimated upon, and shall be provided.

PART 2 -PRODUCTS (Not Used)

PART 3 -EXECUTION (Not Used)

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

END OF SECTION

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

SECTION 01 20 00

MEASUREMENT AND PAYMENT

PART3 -GENERAL

3.01 DESCRIPTION

A. The Contractor shall receive and accept the compensation provided in the Contract as full payment for furnishing all labor, equipment, and materials and for performing all construction/operations necessary to complete the work as described in the Contract, and in full payment for all losses or damages incurred during the work, for any discrepancies between actual and estimated quantities.

B. Payment for the various items on the Contractor's Bid Form, as further specified herein, shall include all compensation to be received by the Contractor for furnishing all tools, equipment, supplies, and manufactured articles and for all labor, operations, supervision, overhead, and profit, and incidentals appurtenant to the items of work being described as necessary to complete the various items of the work all in accordance with the requirements of the Contract Documents, including all appurtenances thereto, and including all costs of compliance with the regulations of public agencies having jurisdiction, including Safety and Health Requirements of the Occupational Safety and Health Administration (OSHA) of the U.S. Department of Labor.

C. No separate payment will be made for any item that is not specifically set forth on the Contractor's Bid Form and all costs therefore shall be included in the prices named on the Contractor's Bid Form for the various appurtenant items of work.

Payment for complying with the safety requirements for construction on the work site shall be included in the contract unit price paid for the various items of work wherein it is required, and no separate payment will be made therefore.

D. The total Bid Amount shall cover all work required by the Contract Documents.

All costs in connection with the proper and successful completion of the work, including furnishing all materials, equipment, supplies, and appurtenances;

providing all construction equipment and tools; including all costs and expenses for taxes, commissions, transportation charges and expenses, permit fees, patent fees, royalties, handling arid tests; and performing all necessary labor and supervision to fully complete the work shall be included in the bid. All work not specifically set forth as a pay item on the Contractor's Bid Form shall be considered a subsidiary obligation of Contractor and all costs in connection therewith shall be included in the unit prices bid and/or the lump sum prices.

E. The quotations for the various items of work are intended to establish a total price for completing the work in its entirety. Should the Contractor feel that the cost for any item of work has not been established by the Contractor's Bid Form, Contractor shall include the cost for that work in some other applicable Bid Item, Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion so that his proposal for the project does reflect his total price for completing the work in its entirety.

F. All estimated quantities stipulated on the Contractor's Bid Form are approximate and are to be used only (a) as a basis for estimating the probable cost of the work and (b) for the purpose of comparing the bids submitted for the work. The actual amounts of work done and materials under unit price items may differ from the estimated quantities. The basis of payment for work and_materials will be the actual amount of work done and materials furnished unless it exceeds the estimated quantities in which case a change order must be approved prior to payment for quantities exceeding the estimated quantity.

G. The Contractor shall field verify all quantities and dimensions shown on the Drawings or contained in the Contract Specifications.

H. The Contractor shall be responsible for establishing contracts with its subcontractors, which have a measurement and payment in accordance with this Section. If the Contractor establishes a contract with its subcontractors, which is in conflict with this Section, any additional cost incurred will be borne by the Contractor.

I. Restoration is not a separate pay item but is considered to be an integral part of the work under the contract, and all contract bid prices include the cost of restoration necessitated by the work related to that bid item. Restoration includes existing structure and property, paving, stabili_zed roads, drainage piping and ditches, catch basins, head walls, yard culverts, driveways, lawns and ground areas, walkways, and irrigation systems, which are altered, removed or damaged during construction. Cleanup is an integral part of restoration.

3.02 COMPUTATION OF QUANTITIES

A. Measurement of quantities expressed as area shall be based upon a horizontal, planimetric projection to the work limits as determined by survey record drawings prepared by a surveyor licensed in the State of Georgia. Cost of surveying shall be paid by Contractor, and incorporated into Bid Items, as appropriate.

B. Measurement of linear Items will be for quantities actually field installed to the specified work limits, based upon surveyed stations recorded along the straight or curved centerline of each respective Item. Measurement conducted by survey is to be conducted by the Contractor's approved surveyor licensed in the State of Georgia.

C. Payment will be made to the limits as specified in the Contract Documents. If the constructed limits are less than the specified limit, payment will be made to the actual limits of construction as shown on the Record Drawings. Payment for quantities that exceed the specified contract limits will only be made with the approval of the Owner with acceptable supporting documentation from the

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Contractor. Payment for quantities that exceed the Contract quantities can only be obtained through an approved Change Order.

D. No partial payments shall be made for the installation of items which have not been tested and approved by the Engineer.

E. Payment will be made monthly until completion of each unit price item based on quantity completed by Contractor, and verified by the Engineer. Final payment will be based on quantity calculated from Record Drawings prepared by a surveyor licensed in the State of Georgia and confirmed by field measurement by the Engineer. Contractor shall submit the Pay App for the Engineer's review and approvalby 5th day of each month.

F. Payment for Lump Sum items will be made as described for each individual lump sum Bid Item. The Contractor shall not rely on the estimated quantities given, but shall instead estimate all quantities for the item independently for the basis of their bid. No claim shall be made by the Contractor for deviations between the Contractor's estimated quantity and the Engineer's estimated quantity including the quantity required to complete the Work. The Contractor shall base their bid solely on the Contractor's independently estimated quantity.

3.03 VARIATIONS IN ESTIMATED QUANTITIES

A. The quantities given in the Contract Documents are approximate only, and are given as a basis for the uniform comparison of bids. The Owner does not expressly, or by implication, agree that the actual amount of work will correspond therewith.

B. The Contractor must provide, for unit price work, a proposed contract price determined on the basis of estimated quantities required for each item. The estimated quantities of items are not guaranteed and are solely for the purpose of comparing bids. Each such unit will be deemed to include an amount for overhead, profit and indirect costs for each separately defined item.

3.04 BID FORM

A. The Bid Form for the items contained within this Section can be found in the contract documents.

PART 4 - PRODUCTS (Not Used)

PART 5 - EXECUTION

5.01 MEASUREMENT AND PAYMENT

A. Item No. 001 - Mobilization/Demobilization (Lump Sum)

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Measurement. Measurement for this item shall be on a lump sum basis based on percentage of work completed.

Payment. Payment for this item shall be on a lump sum basis as described below.

No price adjustments will be made for this item due to changes in the work. Item includes, but not limited to, performance of preparatory paperwork and construction operations, movement of personnel and equipment to the project site, safety equipment, furnishing, and installing at the begi~ing of the project, as well as removing and disposing at the conclusion of the project, required facilities to begin work on a substantial phase of the Contract.

The Contract Price for mobilization/demobilization shall be subject to the following provisions:

a. Partial payments for mobilization/demobilization will be made in accordance with the following schedule.

Condition or Percent of Total Contract Allowable Percent of the Lump Amount Earned Sum Price for the Item

Submittal/completion of items listed in

Section 0 13010 prior to construction

10 percent total contract amount earned 40

25 percent total contract amount earned· 60

50 percent total contract amount earned 80

I 00 percent total contract amount earned 100

The final payment for mobilization/demobilization will not be made until all temporary facilities, excess materials, temporary erosion and sedimentation controls, equipment, and appurtenances used to perform the Work and all remaining construction debris have been removed from the site. Additionally, this shall include the submittal of all final record drawings, record survey project photos, release of liens, warranties, and other incidentals as specified as requirements of project close-out.

B. Item No. 002 - Project Survey (Lump Sum)

Measurement. Measurement for the Work specified in this item shall be based on the schedule below for payment and all Items related to survey the Work shall be included in the Lump Sum price.

Payment. Payment for this item shall be on a lump sum basis as described below.

No price adjustments will be made for this item due to changes in the work. This

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion item will consist of all surveying and control required by the Contract Documents.

Surveying shall be performed as described in the technical specifications. This work includes establishment of appropriate local site benchmarks, baseline surveys, location of utilities, stakeout of elevation and positional information required to complete the construction, progress payment surveys, and obtaining all • survey information required to compile Record (As-Built) Drawings as required by the Contract Documents. As-built drawings must be signed and sealed by a surveyor licensed in the State of Georgia.

The Contract Price for Project Survey shall be subject to the following provisions:

a. Partial payments for surveying will be made in accordance with the following schedule.

Condition or Percent of Total Contract Allowable Percent of the Lump Amount Earned Sum Price for the Item

Preconstruction Survey 25

LFG System Survey 50

Final Survey - Record Drawings and As- 100 Built signed and sealed survey as required

The following define.s complete documents for the surveys notated above:

Preconstruction Survey: The preconstruction survey shall include a survey of the existing conditions within the limits of construction of the Gas Collection and Control System (GCCS) Expansion. The survey shall note all above grade structures, piping, and features which may or will be impacted by the work. The preconstruction survey shall include proposed location of landfill gas header and lateral pipes, stub out locations for future expansions, vertical wells, remote wells, access riser points, isolation valves, air release valves, sumps, road crossings, connection points to existing GCCS, sections to be abandoned and removed, and any other improvement as part of the GCCS Expansion. Vertical well location to include Northing, Easting, ground surface elevation to determine any adjustments prior to drilling.

LFG System Survey: The LFG system survey shall include survey locations of the landfill gas header and lateral pipes, stub out locations for future expansions, vertical wells, remote wells, access riser points, isolation valves, air release valves, sumps, road crossings, bollards, connection points to existing GCCS, abandoned and removed sections, and any other improvement as part of the GCCS Expansion.

Final Survey - Record Drawings and As-Built: Following completion of the LFG Survey, the final survey will include all features of the project installed as part of

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion the construction project and all existing features within the limits of construction.

The final survey shall include, but not limited to, GCCS components, all above grade structures, piping, sod limits, roadways, stormwater downchutes, and features that were impacted by the work.

The Contractor shall, throughout the project, maintain a redline set of construction drawings noting deviations or actual installed conditions for the GCCS Expansion.

As part of Final Completion, the Contractor must submi~ a complete s_et of final Record Drawings based on the redlines maintained throughout the project which identify the actual constructed conditions. These record drawings shall use the construction drawings as a base and show changes by cloud and strikethrough in electronic format (AutoCAD 2018 or newer). The record drawings shall incorporate the surveys listed above and any other changes made to the components of the GCCS into the set so to create a single Record Drawing Set for the project. A draft Record Drawing set, in both hardcopy and AutoCAD 2018 ( or newer) format in accordance with the specifications, must be submitted to the Owner and Engineer for review in order to grant Substantial Completion. Final completion cannot be granted until certified Record Drawings (hardcopy and AutoCAD) signed and sealed by a Georgia licensed Professional Engineer or Land Surveyor and the Project Record Documentation package is submitted to and approved by the Owner and Engineer. The Record Drawings are critical to the Owner and must be accurate to receive approval by Georgia Environmental Protection Division for operation of the facility.

Partial Surveys of Work: It is understood that the Contractor may elect to survey each section of the GCCS system separately. Partial surveys must be submitted to the Engineer to determine that the section the Contractor is requesting to continue working in meets the design requirements. The Contractor may not continue work until the partial survey is approved. Partial surveys are not required to be signed and sealed at the time of submittal, however, the partial surveys used to compile the complete survey for each of the surveys listed above, must not deviate from the partial survey submitted and the complete survey must be certified for submittal.

Payment for surveys will not be made until the complete, certified survey is submitted and approved. However, partial surveys may be used for payment of work items such as soil and piping upon review, agreement, and approval by the Owner, Engineer, and CQA Representative.

C. Item No. 003 -Drilling Rig Platform (Each)

Measurement. Measurement for this item shall be on a unit basis per each landfill gas well.

Payment. Payment for this item will be at the contract unit price per each drilling rig platform constructed for landfill gas well. Payment will include all activities associated with drilling rig platform construction including, excavation, loading, hauling, filling, and compaction of the clean soil the rig platform area near gas well, and deconstructing the platform following the completion of drilling. The

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion grades shall be restored following the removal of platform. Payment shall constitute full compensation for all material, labor; equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Docwnents.

D. Item No. 004 - 36-inch Diameter Bore with 8-inch Diameter SDR 11 HOPE Pipe (Vertical Foot)

Measurement. Measurement for this item shall be on an ·installed linear foot basis per specified landfill gas wells from existing ground surface to the bottom of the well bore as measured in the field by the Engineer.

Payment. Payment for this item will be at the contract unit price per linear foot installed. Payment will include all boring, stone, soil, bentonite, geotextile, well bore reinforcement grate, backfilling, waste relocation to working face, health and safety requirements, HOPE piping (solid and perforated), connections, fittings, and shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Docwnents. Price shall include the above-grade riser pipe at each well.

E. Item No. 005 -Boring Refusal (Vertical Foot)

Measurement. Wells that must be abandoned due to insufficient depth resulting from boring refusal shall be paid on a linear foot basis as measured in the field by the Engineer from existing ground surface t9 the bottom of the well bore. No boring may be abandoned without approval of the Engineer. Proper backfill of abandoned boreholes will include clean soil to surface. This item shall include all material, labor, equipment, waste relocation to working face, backfill transportation, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

Payment. Payment for this item will be at the contract unit price per linear foot of boring, and includes boring, and backfilling with clean soil.

F. Item No. 006 - LFG Well Abandonment (Each)

Measurement. Measurement for this item shall be on a unit basis per each landfill gas well abandonment.

Payment. Payment for this item will be at the contract unit price per each completed landfill gas well abandonment. Payment will include all excavation to required depths; loading, hauling, and disposal of excavated waste at the active.

face; d1sconnecting wellheads; cutting LFG well pipe at required depth and welding caps at end of pipe; installing required hydrated bentonite fill; loading, hauling, and placing of clean backfill on top of bentonite fill; health and safety requirements; and shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents. Note: Contractor to return to the Owner

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion all wellheads removed from abandoned wells. The Owner shall use these wellheads on new LFG wells.

G. Item No. 007 - 12-inch HDPE SDR 17 Pipe in Landfill Gas Header/ Lateral Trench (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe size wherein measurement will be made in the plan view from the LFG System Survey. •

Payment. Payment for this item shall be at the contract unit price per horizontal linear foot of installed 12-inch HDPE SDR 17 header/ lateral piping. Payment includes trench excavation (5 ft deep or less), loading, hauling, and unloading of excavated waste from GCCS expansion trenches and disposing of at the active face; loading, hauling, and unloading of clean soil from adjacent borrow area and placed into GCCS expansion trenches; placing pipe bedding, clean soil backfill, soil compaction, fittings, piping, connections, cutting and capping of pipes to be abandoned in place, pipe location markings, quality control surveying, pressure testing, and incidentals. Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

H. Item No. 008 - 8-inch HDPE SDR 17 Pipe in Landfill Gas Lateral Trench (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe wherein measurement will be made in the plan view from the LFG System Survey.

Payment. Payment for this item shall be at the contract unit price per horizontal linear foot of installed 8-inch HDPE SDR 17 lateral piping. Payment includes trench excavation ( 5 ft deep or less), loading, hauling, and unloading of excavated waste from GCCS expans1on trenches and disposing of at the active face; loading, hauling, and unloading of clean soil from adjacent borrow area and placed into GCCS expansion trenches; placing pipe bedding, clean soil backfill, soil compaction, fittings, piping, connections, cutting and capping of pipes to be abandoned in place, pipe location markings, quality control surveying, pressure testing, and incidentals. Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

I. Item No. 009- 6-inch HDPE SDR 17 Pipe in Landfill Gas Lateral Trench (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe wherein measurement will be made in the plan view from the LFG System Survey.

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

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0120 00-8

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Payment. Payment for this item shall be at the contract unit price per horizontal linear foot of installed 6-inch HDPE SDR 17 lateral piping. Payment includes trench excavation ( 5 ft deep or less), loading, hauling, and unloading of excavated waste from GCCS expansion trenches and disposing of at the active face; loading, hauling, and unloading of clean soil from adjacent borrow area and placed into GCCS expansion trenches; placing pipe bedding, clean soil backfill, soil compaction, fittings, piping, connections, stub-ups for connections at wellheads, cutting and capping of pipes to be abandoned in place, pipe location markings, quality control surveying, pressure testing, and incidentals. Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

J. Item No. 010-24-inch HP Storm Casing for Road Crossing (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe wherein measurement will be made in the plan view from the LFG System Survey.

Payment. Payment for this item will be at the contract unit price per linear foot installed, including excavation, backfiiling, solid corrugated drainage piping installation and connections, testing, and other incidentals. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

K. Item No. 011 -4-inch HDPE SDR 11 Liquid Conveyance Line in Common Trench (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe size wherein measurement will be made in the plan view from the LFG System Survey.

Payment. Payment for this item shall be at the contract unit price per horizontal linear foot of installed 4-inch HDPE SDR 11 Liquid Conveyance Line in a common trench with the air supply line and header or lateral pipe. Payment includes fittings, piping, connections, stub-ups for connection at wellheads and isolation valves, cutting and capping of pipes to be abandoned in place, pipe location markings, quality control surveying, pressure testing, and incidentals.

Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

L. Item No. 012-4-inch HDPE SDR 11 Liquid Conveyance tine in Separate Trench (Linear Foot)

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

MEASUREMENT & PAYMENT

0120 00-9

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe size wherein measurement will·be made in the plan view from the LFG System Survey.

Payment. Payment for this item shall be at the contract unit price per horizontal linear foot of installed 4-inch HDPE SDR 11 Liquid Conveyance Line in. a separate trench with the air supply line and header or lateral pipe. Payment includes fittings, piping, connections, stub-ups_ for cormection at wellheads and isolation valves, cutting and capping of pipes to be abandoned in place, pipe location markings, quality control surveying, pressure testing, and incidentals.

Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

M. Item No. 013 - 2-inch HDPE SDR 9 Air Supply Line in Common Trench (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe size wherein measurement will be made in the plan view from the LFG System Survey.

Payment. Payment for this item shall be at the contract unit price per horizontal linear foot of installed 2-inch HDPE SDR 9 Air Supply Line with the liquid conveyance line and header or lateral pipe. Payment includes fittings, piping, connections, stub-ups for connections at wellheads and isolation valves, cutting and capping of pipes to be abandoned in place, pipe location markings, quality control surveying, pressure testing, and incidentals. Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

N. Item No. 014-12-inch Header Isolation Valves (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment for this item will be at the contract unit price per installed unit, including excavation, backfilling, flanges, valves, valve stem extension controls, fittings, spacers, piping installation and connections, flexible hoses, and related component, testing, plastic wrapping and coating, and other incidentals. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract DocUl_llents.

0. Item No. 015 -2-inch Air Supply Line Isolation and BlowoffValves (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

MEASUREMENT & PAYMENT

0120 00-10

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Payment. Payment for this item will be at the contract unit price per installed unit, including excavation, backfilling, valves, fittings, spacers, piping installation and connections, pipe supports and related component, testing, and other incidentals.

Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

P. Item No. 016-4-inch Liquid Conveyance Line Air Release Valves (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment for this item will be at the contract unit price per installed unit, including excavation, backfilling, valves, fittings, spacers, piping installation and connections, pipe supports and related compo:nent, flanges, pressure testing, and other incidentals. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

Q. Item No. 017-4-inch Liquid Conveyance Line Cleanout (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment for this item will be at t~e contract unit price per installed unit, including excavation, backfilling, valves, fittings, spacers, piping installation and connections, testing, and other incidentals. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

R. Item No. 018-12-inch HDPE SDR 17 Header Access Riser (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment for this item will be at the contract unit price per installed vacuum access risers for the 12-inch HDPE SDR 17 header pipe, including completed access riser, fittings, piping, blind flange with neoprene gaskets, connections to header line, monitoring ports, tubing for LFG sampling, testing, and other incidentals. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

S. Item No. 019-LFG Wellheads- (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

MEASUREMENT & PAYMENT

0120 00-11

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion

Payment. Payment for this item shall be at the contract unit price per supplied unit, including new QED Precision Accu-Flo wellheads with fine tune control valve and all required connections, QED well caps, Solarguard flex hose, steel clamps, fittings, monitoring/sample port covers, high liquid level indicator, and HOPE reducers. Contractor shall also include the material and labor for installing the wellheads on remotes, horizontal collectors and any required transitions and fittings. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

T. Item No. 020 - 4-inch Liquid Conveyance Stub-up Pump Discharge Manifold- (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis. This item is for the pump discharge manifold at stub-ups at a new gas well.

Payment. Payment for this item will be at the contract unit price per supplied unit, including valves, fittings, spacers, installation and connections, testing, and other incidentals. Contractor is to install stub-ups and pump discharge manifold and connect the pump discharge manifold with the new pump placed in the gas extraction well. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

U. Item No. 021 -2-inch Air Supply Stub-up Valve Fittings- (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis. This item is only for the check and ball valve at stub-ups at new gas well and condensate sump.

Payment. Payment for this item will be at the contract unit price per supplied unit, including valves, fittings, spacers, installation and connections, testing, and other incidentals. Contractor is to install stub-ups, valves, and valve fittings. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

V. Item No. 022 - Gas Extraction WeH Pumps Supplied and Installed- (Each)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment for this item will be at the contract unit price per supplied unit, including Pneumatic Pump QED Model AP-4 or equivalent, fast fitting kit, suitable connectors for air and liquid conveyance line, well seal cap, fittings, air intake kit, piping installation and connections, monitoring ports, testing, and commissioning. The Contractor shall not purchase any pumps without the

Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

MEASUREMENT & PAYMENT

0120 00-12

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion approval and direction of the Owner and Engineer. The pumps will be requested from the Contractor on an as needed basis depending on the conditions observed as the vertical gas extraction wells are installed and brought into operation.

Payment includes connections to gas well pump and pump fitting kits and lowering the pumps in the gas extraction well. Pump placement shall require Owner and Engineer direction for placement and approval. Payment shall constitute full compensation for all material , labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

W. Item No. 023 - Nylon Tubing and Pump Support Rope for Gas Well Pumps (Linear Foot)

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment for this item shall be at the contract unit price per linear foot of installed Nylon Tubing and pump support rope for gas well pumps. Payment includes connections to gas well pump and pump fitting kits and lowering the pumps in the gas extraction well. Pump placement shall require Owner and Engineer direction for placement and approval. Payment shall constitute full compensation for all material, labor, equipment and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

X. Item No. 024 - 18-inch HP Storm Casing for Road Crossing (Linear Foot)

Measurement. Measurement for this item shall be on an installed linear foot basis per specified pipe wherein measurement will be made in the plan view from the LFG System Survey.

Payment. Payment for this item will be at the contract unit price per linear foot installed, including excavation, backfilling, solid corrugated drainage piping installation and connections, testing, and other incidentals. Payment shall constitute full compensation for all material, labor, equipment, and work incidental thereto, necessary to complete this item in accordance with the Contract Documents.

Y. Item No. 025 -Side Slopes Seeding and Erosion Control Matting (Square Yard)

Measurement. Measurement for this item shall be on a square yard basis wherein measurement will be made in the plan view from the Final Survey. The area has been ystimated to include a 60-foot wide section following the alignment of the header and lateral along the side slopes. Areas disturbed by the Contractor that are not required as part of the performance of the work, as determined by the Owner and Engineer, will not be included in the quantity of payment.

Payment. Payment for this Bid Item will be made on a square yard basis of actual seed installed and accepted. This pay item shall include, but not limited to, Augusta Engineering and Environmental Services Department Deans Bride Road MSW Landfill 2023 GCCS Expansion

MEASUREMENT & PAYMENT

0120 00-13

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion materials, labor, equipment, conditioning topsoil with fertilizer and/or lime application, supplying and installing seed, replanting, repair of erosion, maintaining areas seeded through final acceptance of the Work, and any other work necessary to produce a uniform stand of grass. No payment will be made for seed piaced outside of the limits of specified areas without prior approval of the Engineer or for areas disturbed by the Contractor that are not required as .part of the performance of the Work. Payment of seed shall not relieve the Contractor of the need to maintain seeded areas throughout warranty period.

Z. Item No. 026 -Tie-In to Existing 10-inch Header (Each}

Measurement. Measurement for this item shall be on a completed and installed unit basis.

Payment. Payment shall include excavation to existing 10-inch HDPE SDR 17 header, and tie-ins to the header pipe with any…