23_237_ADD1_4.pdf

PARTl -GENERAL

1.01 GENERAL

SECTION 32 90 00

SEEDING AND SODDING

A. The Contractor shall furnish all labor, materials, equipment and incidentals necessary to perform all work and services for completion of all sodding and seeding; which will occur in all Contractor disturbed areas as shown on the drawings and as specified, in accordance with provisions of the Contract Documents. Sodding is required on all disturbed areas on a side slope and staging/laydown area located on the top slope and seeding is required on other disturbed top slope.

B. The work shall include, but not necessarily be limited to soil preparation, liming, fertilizing, seeding and mulching, sodding and maintenance of all areas as shown on the drawings and as specified herein, including all areas disturbed by the Contractor.

C. Construct grassing operations in strict conformity with the drawings and specifications and in accordance with the Georgia Department of Transportation (GDOT) Standard Specifications Construction of Transportation Systems, 2013 edition or newer.

D. Do not incorporate materials in construction until approved by the Engineer.

1.02 Submittals

A. Seed: Signed copies of vendor's statement for each grass seed mixture required, stating botanical and common name, percentage by weight, and percentages of purity, germination, and weed seed. Statement shall certify that each container of seed delivered is fully labeled in accord with Federal Seed Act and equals or exceeds Specification requirements.

B. Sod: Prior to placing sod out, notify the Engineer of source and permit the Engineer to inspect. Submit documentation from supplier regarding species and percentages of purity.

C. Fertilizer: Furnish duplicate copies of invoices for all fertilizer used on project, along·,with certification of quality and warranty.

D. Guarantee. Furnish copies of manufacturer/supplier warranties or guarantees for all products provided under this Specification.

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Seeding and Sodding 32 90 00-1

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

PART 2 - PRODUCTS

2.01 TOPSOIL

A. Refer to Section 31 20 00, Excavating, Trenching, Backfilling, and Grading.

2.02 SOD

A. Provide dense, strongly rooted Bermuda grass·sod in areas with preexisting grass that is disturbed as a part of the construction and is not less than 2 years old and free of weeds and undesirable native grasses. Sod shall be certified to meet Georgia State Plant Board Specifications and obtained from nurseries that have a Georgia Live Plant License following Section 890.2.02 of GDOT Standard Specifications Construction of Transportation Systems, 2013. Sod· shall have a soil backing not less than ½ inches in depth.

2.03 SEED

A. Fresh, clean, new-crop seed labeled in accord with U.S. Department of Agriculture Rules and Regulations and Georgia Seed Laws and Rules and Regulations in effect on date of bidding.

B. Provide seed of grass species, proportions and minimum percentages of purity, germination, and maximum percentage of weed seed, as specified in Section

890.2.01 of GDOT Standard Specifications Construction of Transportation Systems, 2013. Furnish seed in sealed standard containers labeled with producer's name and seed mixtµre and percentages of purity, germination, and weed seed for each grass seed species required.

C. Ensure each bag of seed is tagged with an analysis tag showing the results of a test made within 9 months of planting. Wet, moldy, or otherwise damaged seed shall not be used.

2.04 MULCH

A. Provide clean, seed-free, threshed straw of oats, wheat, barley, rye, beans, peanuts, Bermuda grass hay, or other locally available mulch material. All mulch materials shall be air dried and suitable for spreading with standard mulch blowing equipment.

B. Do not use mulch that contains an excessive quantity of matured seeds of noxious weeds, or other species that will grow or provide a menace to surrounding land.

Do not use mulch material which is fresh or excessively brittle, or which is decomposed and will smother or retard growth of grass.

Augusta Engineering and Environmental Services Department Deans Bride Road 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

2.05 MULCH BINDER

A. Mulch on slopes exceeding 3: 1 ratio shall be held in place by the use of an approved mulch binder. The mulch binder shall be nontoxic to plant life.

2.06 INOCULANT FOR LEGUMES

A. All leguminous seed shall be inoculated prior to seeding with a standard culture of nitrogen-fixing bacteria that is adapted to the particular seed involved.

2.07 FERTILIZER

A. Provide commercial fertilizer conforming to GDOT Standard Specifications, Section 891. Use commercial fertilizer as a single nutrient or mixed grade.

B. Apply fertilizer as a dry or liquid material, using equipment specifically designed for mixing and agitating the fertilizer. Container bags shall have the name and address of the manufacturer, the brand name, net weight, and chemical composition

C. Dry or liquid fertilizer may be applied by use of a hydroseeder. Any fertilizer that becomes caked or otherwise damaged, making it unsuitable for use, shall be replaced at the Contractor's expense.

2.08 LIMESTONE

A. Dolomitic limestone shall be an approved product designated for agricultural use.

The limestone shall be a pulverized limestone having a calcium carbonate content of not less than 85% by weight. Agricultural limestone shall be crushed so that at least 85% of the material will pass a No. 10 mesh screen and 50% will pass a No.

40 mesh screen.

2.09 SULFUR

A. Sulfur chips shall be an approved product designated for agricultural use.

2.10 WATER

A. The water used in the seeding and sodding operations may be obtained from any approved spring; pond, lake, stream or municipal water system. The water shall be free of excess and harmful chemicals, acids, alkalis, or any substance which might be harmful to plant growth or obnoxious to traffic. Salt water shall not be used.

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

Seeding and Sodding 32 90 00-3

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

PART 3 -EXECUTION

3.01 GENERAL REQUIREMENTS

A. Topsoil shall be placed to achieve a depth of 6 inches in all areas indicated to be sodded on the Contract Drawings and as specified herein.

B. Mulch material shall be applied uniformly over all seeded areas indicated on the Contract Drawings and as specified herein.

C. All areas within the limits of the work and all areas disturbed by the Contractor's operations, with the exception of stockpile and borrow areas, shall be sodded or seeded unless otherwise indicated on the Contract Drawings.

D. The period of sod establishment shall begin immediately after completion of sodding in an area and shall continue for a period of 1 year after the completion of sodding on the entire project unless the desired cov,er is established in a shorter period of time and shortening of the sod-establishment period is authorized by the Engineer.

E. Unless otherwise shown on the drawings, sod shall be placed on top of backfill material in all disturbed areas along the side slopes, and seed along the top slope.

Staging/laydown area located on top slope will require sod. It has been estimated that the disturbed area will be 30 feet wide and the length of all installed piping plus the tie-in areas.

3.02 SECURING AND SOIL J>REPARATION

A. Topsoil shall be secured from areas from which topsoil has not been previously removed, either by erosion or mechanical methods. Topsoil shall not be removed to a depth in excess of the depth approved by a soils engineer.

B. The area or areas from which topsoil is secured shall possess such uniformity of soil depth, color, texture, drainage, and other characteristics as to offer assurance that, when removed, the product will be homogeneous in nature and will conform to the requirements of these Specifications.

C. All areas from which topsoil is to be secured shall be cleaned of all sticks, boards, stones, lime, cement, ashes, cinders, slag, concrete, bitumen or its residue, and any other refuse which will hinder or prevent growth.

D. In securing topsoil from a designated pit, or elsewhere, should strata or seams of material occur which do not come under the requirements for topsoil, such material shall be removed from the topsoil, or if required by a soils engineer, the pit shall be abandoned

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

E. The Contractor shall, by a qualified laboratory, conduct laboratory analysis on 5 representative samples to determine pH content and nutrient levels. The rate for adding sulfur or lime shall be based upon recommendation by the laboratory.

F. All areas to receive topsoil, seed and/or sod shall be raked, and all rubbish, sticks, roots and stones larger than 1 inch shall be removed. Loosen subgrade surface immediately prior to being covered with topsoil. Subgrade shall be inspected and approved by the Engineer before topsoil is pla<;:ed.

G. Topsoil shall be placed over approved areas to a depth sufficiently greater than required so that after natural settlement and light rolling the complete work will conform to the lines, grades, and elevations as indicated on the Contract Drawings. No topsoil shall be spread in water or while.excessively wet.

H. Loosen topsoil surface to a minimum depth of 2 inches. Remove stones over 1 inch in any dimension and sticks, roots, rubbish and other extraneous matter.

3.03 APPLICATION OF LIMESTONE, SULFUR AND FERTILIZER

A. Sulfur and Limestone: If laboratory results indicate the addition of sulfur or lime is necessary, spread uniformly over designated areas to be seeded or sodded at the rate recommended. Thoroughly mix through upper 2 inches of topsoil.

B. After application of sulfur or lime, and prior to applying fertilizer, loosen areas to be seeded or sodded with a suitable device if soil has become hard or compacted.

Correct any surface irregularities in order to prevent pockets or low areas, which will allow water to stand.

C. Fertiiizing: Distribute fertilizer uniformly with a suitable distributor over areas to be seeded or sodded at a rate of 30 pounds per 1,000 square feet.

D. Incorporate fertilizer into topsoil to depth of at least 2 inches by disk harrowing or other approved methods. Clean surface of stones or other substances, which will interfere with, turf development or subsequent mowing operations.

E. Grade areas for seed or sod to a smooth, even surface with a loose, uniformly fine texture. Roll and rake, remove ridges and fill depressions, as required to meet finish grades. Limit fine grading to areas, which can be seeded or sodded soon after preparation.

F. Fertilizer need not be incorporated in the soil when mixed with seed in water and applied with power sprayer equipment. The seed shall not remain in water containing fertilizer for more than thirty (30) minutes when a hydraulic seeder is used.

G. Limestone shall be thoroughly mixed into the soil in accordance with the soil pH.

Contractor shall notify the soil pH result to the Engineer and get approval for the lime application rate.

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

H. It is the responsibility of the Contractor to make one (1) application of maintenance fertilizer at one-half the rates and should be applied in early spring following initial establishment of cover.

3.04 SEEDING OPERATIONS

A. All disturbed areas that will not be reworked or sodded within 14 days maximum shall be temporarily seeded and mulched. Disturbed areas outside the "Limits of Construction" as shown on the Contract Drawings shall be sodded at.no additional cost to the Owner.

B. Seeding shall be in accordance with GDOT Standard Specifications, applied at a mixture and rate in conformance with Section 700.3.05. for Zone 3. Steep slope seeding shall be in accordance with GDOT Standard Specifications, Section

700.3.05. Seed shall be sown as soon as preparation of the seedbed has been completed. No seed shall be sown during high winds, nor until the surface is suitable for working and is in a proper condition. Seed mixtures may be sown together provided they are kept in a thoroughly mixed condition during the seeding operation.

C. Seeds shall be uniformly sown by any ·approved mechanical method to suit the slope and size of the areas to be seeded, preferably with a broadcast type seeder, windmill hand seeder, or approved mechanical power drawn seed drills.

Hydroseeding and hydromulching may be used on steep embankments, provided full coverage is obtained. Care shall be taken to adjust the seeder for seedings at the proper rate before seeding operations are started and to maintain their adjustment during seeding. Seed in hoppers shall be agitated to present segregation of the various seeds in a seeding mixture.

D. Immediately after sowing, the seeds shall be covered and compacted to a depth of 1/8 to 3/8 inch by a cultipacker or suitable roller.

E. Plant establishment including watering shall be in accordance with GDOT Standard Specifications, Section 700.3.07.A.

F. Protect seeded slopes against erosion with erosion control matting or other methods approved by ENGINEER.

3.05 MULCIDNG OPERATIONS

A. Mulching shall be in accordance with GDOT Standard Specifications, Section 700.3.05.G.

B. Apply mulch immediately after seeding. Mulch shall be applied evenly between 3/4 inch and 1-1/2 inch deep, according to the texture and moisture content of the mulch material.

Augusta Engineering and Environmental Services Department Deans Bride Road 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

C. Apply mulch with tackifier regardless of whether using ground or hydroseeding equipment for seeding. Apply enough tackifier to the mulch to hold it in place. Do not apply mulch on windy days. Immediately replace mulch that blows away.

D. Apply walked-in-mulch on slopes ranging in steepness from 5:1 to 2:1.

Immediately walk it into the soil with a cleated track dozer. Make dozer passes vertically up and down the slope.

3.06 SODDING OPERATIONS

A. The setting of sod pieces shall be staggered in such a manner as to avoid continuous seruns where possible.

B. Sod shall be carefully placed by hand, edge to edge, in rows at right angles to the slope.

C. Sodding shall be in accordance with GDOT Specification Section 700.3.05.H.

D. Plant establishment including watering shall be in accordance with GDOT Specification Section 700.3.07.A.

3.07 WATERING

A. The Contractor shall be responsible for maintaining the proper moisture content of the soil to insure adequate plant growth until a satisfactory stand is obtained. If necessary, watering· shall be performed to maintain an adequate water content in the soil.

B. Watering shall be accomplished by hoses, tank truck, or sprinklers in such a way to prevent erosion, excessive runoff, and overwatered spots.

3.08 MAINTENANCE

A. The Contractor shall keep all seeded and sodded areas watered and in good condition until final acceptance.

B. The repair of any erosion or sod relocation necessary prior to the sod becoming firmly rooted to the existing soil will be the responsibility of the Contractor.

C. Begin maintenance of sodded areas immediately after each portion is planted and contiQ.ue until final acceptance.

D. Maintenance shall be in accordance with GDOT Specification Section 700.3.07;

however, at a minimum, all temporary and final seeded and sodded areas shall be watered twice per week with a minimum of 1/4 inch water applied per watering event.

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

E. Upon completion of seeding operations, the Contractor shall clear the area of all equipment, debris, and excess material and the premises shall be left in a neat and orderly condition.

F. The Contractor shall maintain all seeded and sodded areas without additional payment until final -acceptance of the Work by the Owner, and any regrading, refertilizing, reliming, reseeding, or remulching shall be done, at Contractor's own expense. Seeding work shall be repeated on defec~ive areas until a satisfactory uniform standard is accomplished. Damage resulting from erosion, gullies, washouts, or other causes, shall be repaired by filling with topsoil, compacting, and repeating the seeding work at Contractor' s expense.

G. Engineer may require the use of Bermuda sod in areas where Bermuda sod has been disturbed during construction. Additional seeding may be required until Bermuda grass growing season is established.

3.09 FINALACCEPTANCE

A. All seeded and sodded area shall have a satisfactory growth and coverage at the final acceptance of the Work by the Owner. The vegetation growth will be considered satisfactory that has no bare spots larger than 1 ft2 and bare spots comprise of no more than 1 percent of any given area.

B. Sodded areas will be acceptable provided all requirements, including maintenance, have been complied with, anq a healthy, uniform, close stand of specified grass is established, :free of weeds, bare or dead spots and surface irregularities.

C. The Contractor shall maintain the sodded areas in a satisfactory condition until final acceptance of the project. Such maintenance shall include the filling, leveling, and repairing of any washed or eroded areas, as may be necessary. If the planted areas must be resodded, reshaped, or otherwise repaired, regardless of cause, the Contractor shall perform such work at the Contractor's expense. The Engineer, at any time may require replanting of any areas in which the establishment of the grass stand does not appear to be developing satisfactory at no additional cost to Owner.

D. The period of establishment for areas that are reseeded or resodded shall extend to 1 year after the completion of reseeding or resodding unless otherwise authorized by the Owner or ENGINEER.

END OF SECTION

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Seeding and Sodding 32 90 00-8

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

SECTION 32 90 20

ENVIRONMENT AL ASSESSMENT

PART 1 - GENERAL

1.01 GENERAL

A. The Contractor shall evaluate the existing site environmental conditions and adjacent areas prior to commencement of work

1.02 LANDSCAPING AND VEGETATION

A. Existing landscaping and other vegetation that is to remain in place shall be protected against unnecessary cutting, breaking or skinning of roots, skinning and bruising of bark, excess foot or vehicular traffic, or improper parking of vehicles on vegetation. Temporary fences, barricades or guards shall be used to protect vegetation to be left standing.

B. Any vegetation to remain within limits of contract work shall be watered as required to maintain their health during course of construction operations.

C. The CONTRACTOR shall repair or replace vegetation that will remain, which are damaged by construction operations, in a manner acceptable to the OWNER at the CONTRACTOR' s expense when deemed necessary.

1.03 PREPERTY RESTORATION

A. All landscaping and/or irrigation systems affected by work shall be restored to original condition at the CONTRACTOR's expense.

B. The CONTRACTOR sha~l assume all responsibility and liability for property damages, bodily injury, or financial losses and interruptions of service that may result from the construction activities which affect structures, facilities, water lines, gas lines, power lines, electric conduits, sewer lines, telephone lines, cable TV lines, cable internet lines, and all service facilities connected thereto.

C. The CONTRACTOR shall be responsible for relocation, repairing, reconstruction, and re-installation of damaged or disturbed items due to the construction activities.

D. Dama_ged or disturbed items shall be re-installed or restored to their original condition as soon as possible and prior to completion of work at the CONTRACTOR's expense. Restoration shall be approved by the authority having jurisdiction over the disturbed items. There shall be no extra cost to the OWNER.

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

ENVIRONMENTAL ASSESSMENT

32 9020-1

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

E. Items not specifically stated in the Specifications that are removed, damaged, destroyed, or defaced due to neglect or carelessness on the part of the CONTRACTOR shall be repaired or replaced by the CONTRACTOR if determined so by the OWNER.

END OF SECTION

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

ENVIRONMENTAL ASSESSMENT

32 90 20-2

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

SECTION 33 21 70

LFG EXTRACTION WELLS AND WELLHEADS

PART 1 - GENERAL

1.01 DESCRIPTION

A. Scope of Work: The Contractor shall provide all labor, equipment, materials, and appurtenances necessary to drill, install and make ready LFG extraction wells as indicated on the Drawings.

B. The perforated pipe, gravel stone, geotextile, bentonite; and soil backfill shall be set at depths and thicknesses shown on the Drawings or as designated in the field by the Engineer. It is expected that combustible and asphyxiant gases will be venting from boreholes drilled into waste within the footprint of the landfill. The Contractor's bid price shall include provision for all equipment and procedures necessary to safely install wells and borings under this condition. All Work shall be performed by qualified workers in accordance with the best standards and practices available.

C. Upon completion of each new extraction well or boring, Contractor shall dispose of all construction and drilling refuse materials as specified in Section 02 41 16 or as directed by the Owner.

D. Related Work Described Elsewhere:

1. Section 02 41 16: Refuse Handling, Storage, and Disposal

2. Section 33 51 10: Pipe and Pipe Fittings

3. Section 33 21 80: Landfill Gas Collection System Appurtenances

1.02 REFERENCES

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

STANDARD TEST METHODS/PRACTICE

ASTM D 420-98

ASTM D 422-63

ASTM D 1452-80

ASTM D 2487-00

Standard Guide to Site Characterization for Engineering, Design, and Construction Purposes

Standard Method for Particle-Size Analysis of Soils

Standard Practice for Soil Investigation and Sampling by Auger Borings

Standard Classification of Soils for Engineering Purposes (Unified Classification System)

Augusta Engineering and Environmental Services Department Deans Bride Road 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

ASTM D 2488-00

1.03 SUBMITTALS

Standard Practice for Description and Identification of Soils (Visual-Manual Procedure)

A. The Contractor shall prepare and submit to the Engineer, for review and approval, Certificates of Compliance on materials furnished, and manufacturer's brochures containing complete information and instructions pertaining to the storage, handling, installation, and inspection of pipe and appurtenances furnished as described in Contractor Submittals.

B. The Contractor shall prepare and submit to the Engineer for review and approval, Shop Drawings showing dimensions, materials, and manufacturer's information for pipe, pipe perforations, fittings, and bentonite.

C. One week prior to well drilling, Contractor shall submit an example well boring log and construction log. The example log shall be completed with all of the required descriptions and pertinent information required under Part 3.03 of this Section.

D. At least two weeks prior to construction, the Contractor shall submit to the Engineer for review and approval, results of the sieve analysis for the soil backfill, samples of all well backfill materials (if requested), the name of the vendor(s), and source of backfill materials furnished.

E. At the end of each day, Contractor shall provide copies of the handwritten well boring and completion logs for each well drilled on that day. Information to be included on the well logs is listed in Part 3. 03 of this Section.

F. Electronic (typed) copies Final boring logs based on field information shall be submitted with the Record Documents. Description of the boring and excavated material shall be according to the attached well boring log templ~te at the end of this Section.

1.04 QUALITY ASSURANCE

A. A professional experienced in installation of LFG wells shall be responsible for observing and documenting information related to all boring and installation activities. The OWNER will contract with the quality assurance professional that will oversee and observe the extraction well installation.

B. Inspect well materials for cleanliness, deformations, and imperfections, and ensure conformance with Specifications prior to use.

PART 2 - PRODUCTS

2.01 CLEAN SOIL BACKFILL

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

LFG Extraction Wells and Wellheads 33 21 70-2

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

Clean soil backfill material shall be granular material free of clay, sticks, roots, organic material, MSW, and stones larger than 1-inch in any dimension. Clean soil shall be used in any location on Drawings that calls for "clean soil backfill".

2.02 STONE

A. Stone backfill shaffbe 1" to 3", hard, durable non-calcareous rock. Stone shall be washed as a component of the manufacturing process and be free of organics, lumps or balls of clay, and other deleterious materials. -

Stone shall be AASHTO No. 4 or approved equal and conform to the following gradation requirements:

Sieve Size 2-inch

% Passing (by Weight)

1 ½-inch I-inch 3/4-inch 3/8-inch

90-100 20-65 0-15 0-5

B. Pea gravel (GDOT #8) shall be durable non-calcareous and washed. It should be free of organics, lumps or balls of clay~ and other deleterious.

2.03 BENTONITE

A. "Bentonite Plug" as used in the Drawings, shall refer to a well seal comprised of hydrated sodium bentonite pellets oi chips of a thickness as indicated on the Drawings. Bentonite material shall consist of clay greater than 85% sodium montmorillonite, without additives.

B. Bentonite shall be hydrated per manufacturer's instructions prior to backfilling with soil. Bentonite shall be hydrated in 6-inch lifts as per Paragraph 3.05 B of this Section.

C. Under no circumstances will the use of granular bentonite be permitted for the vertical extraction wells.

2.04 HOPE PIPE

A. Pipe for extraction wells shall be 8-inch HOPE SDRl 1 as shown on the Drawings and conforming to the requirements of Section 33 51 10 Part 2.01.

B. The perforations in the extraction well piping shall be as specified on the Drawings.

2.05 WELL IDENTIFICATION

A. Upon completion of well drilling and piping installation, Contractor to install one

(1) printed yellow well identification label sticker on each well casing:

Augusta Engineering and Environmental Services Department Deans Bride Road 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

a. Identification labels must be outdoor, UV resistant, waterproof, and permanently adhered around the well casing.

b. Identification label shall contain the following information: The words Well identification "W-X" and "Landfill Gas Extraction Well" like the example shown below. Lettering by any other means shall not be permitted.

c. Identification label shall be 6-iilch tall and safety yellow with black lettering. Lettering size (W-X) to be 2-inch tall. Contractor to provide template before ordering labels.

d. Identification labels similar to ones found in the following websites:

1.

2.

http:/ /tufil.abels.com/outdoor-durable-labels/ https://www.rippedsheets.com/sheet-labels/102285-outdoor-matte-waterproof-vinyl-super-permanent labels.html

2.06 GEOCOMPOSITE "DONUT"

A. Geocomposite or geotextile ring or donut to be placed between stone and clean soil backfill in well shall be a 36-inch diameter with an 8-inch opening for traditional and 12-inch opening for .dewatering LFG extraction wells.

2.07 WELLHEAD

A. Wellheads shall be QED's Precision Accu-Flow quick change orifice plate wellheads 2-inch vertical wellheads, or equivalent approved by the Owner's Representative, and consistent with the Drawings.

2.08 WELLHOSE

A. Wellhose shall be QED Solarguard flexible hose or kanaflex flexible hoses with power lock clamps inspected and approved by the Owner's Representative and consistent with the Drawings.

i> ART 3 - EXECUTION

3.01 PRE-CONSTRUCTION SERVICES

A. The Contractor shall survey and stake the well boring locations prior to drilling.

Pre-construction layout surveying shall be done by a Georgia Licensed Professional Surveyor.

Augusta Engineering and Environmental Services Department Deans Bride Road 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

B. Contractor shall supply surveyed ground elevations of the proposed new extraction wells to the Engineer so that the design well depths may be confirmed at least one week prior to drilling.

C. Extraction well and boring locations must be approved and may be adjusted by the ENGINEER prior to beginning drilling.

3.02 DRILLING

A. Contractor shall stake the extraction wells locations prior to initiating drilling and coordinate the start of drilling with the Engineer.

B. The Contractor shall provide at all times a thoroughly experienced, competent driller during all operations at the drill site.

C. The Contractor must use dry drilling equipment.

D. Wells are to be drilled to the depth vertically straight and the diameter as shown on the Drawings. The boring depths shown on the Drawings may be adjusted in the field by the Engineer. Under no circumstances are the drilling depths from the well schedule on the Drawings to be exceeded unless approved by the Engineer in advance.

E. At wells located on the sloped ground, Contractor shall install a soil platform using general fill material to level the ground prior to drilling a vertical bore.

F. If wet boring conditions are observed during drilling, the Contractor shall do the following:

1. The Engineer shall be notified of wet boring conditions.

2. If water is encountered in a boring, the Contractor may be directed by the Engineer to drill beyond the point at which it was encountered. If wet conditions remain; at the direction of the Engineer, the boring may be terminated ( after driller has attempted to advance boring for 2 hours) and the length of perforated pipe adjusted by the Engineer. If wet conditions cease (e.g., due to a perched water layer), then drilling will continue to the design depth.

3. If water is encountered in a boring at a shallow depth, the Engineer may decrease the well depth and length of perforated pipe, or relocate the well.

G. If a b()re needs to be abandoned, the contractor shall do the following:

1. If, in the opinion of the Engineer, the borehole has not reached a sufficient depth to function as an effective extraction well, the Contractor shall abandon this borehole by backfilling it with cuttings removed during drilling. Soil shall be backfilled and compacted to ground surface.

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

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

Contractor shall supply additional soil backfill to refill any settlement within the abandoned borehole, as approved by the Engineer.

2. The Contractor shall make a conscious effort to drill through the obstructions. If a no-progress obstruction is encountered and drilling through is not possible, the Contractor shall immediately contact the Engineer and as directed install a shorter well, or relocate the well and abandon the drilled hole. If the drill rates drop below two linear feet per hour due to the presence of any obstructions, the Contractor shall immediately contact the Engineer to inform them of the situation. If the Engineer asks the Contractor to continue drilling through the obstruction, the Contractor can charge the Owner at the hourly drilling rate provided in the Bid Form until the drilling rate increases abpve two linear feet per hour or the Engineer instructs the Contractor to stop the drilling.

3. If cuttings are unsuitable as backfill (for example, box springs, tires, etc.)

the Contractor shall use soil backfill material.

4. Compensation for abandoned borings shall be at the unit price for boring refusal.

H. The bore for the well shall be straight and the well pipe shall be installed in the center of the borehole.

1. Following well drilling, a 5-foot by 5-foot well bore reinforcement grate shall be installed over the top of the-borehole with opening sizes as shown in the drawing

2. The Contractor shall take all necessary precautions to maintain the well pipe vertically plumb during the entire backfill operation of the borehole to the satisfaction of the Engineer.

3. The grate over the-borehole that is used to keep the well casing plumb shall not be removed until the borehole is backfilled to within 2 feet of ground surface.

4. If the pipe is installed out of plumb, as determined by the Engineer, the Contractor, at his own expense, shall correct the alignment.

5. The well casing shall extend above ground surface as shown on the drawing. No pipe couplings shall be installed above grade or within 10 feet of ground surface below grade

I. If for any reason the Contractor suspects that drilling may have advanced to or beypnd the liner system, the Contractor shall immediately notify the Owner in verbal and written communication.

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

LFG Extraction Wells and Wellheads 33 21 70-6

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

J. Contractor shall leave a solid well casing above the existing landfill grades at the location of the gas extraction wells and horizontal manifold, in accordance with the Drawings.

K. Contractor shall remove all working platforms constructed for the drill rig after the installation of the well. Hauling, construction, removal, and other work tasks related to well installation shall be carried out with minimal disturbance to the vegetation on the landfill. Any disturbance to the vegetation on the landfill shall be restored to original conditions by the Contractor at his own expense.

3.03 WELL LOGS

A. Contractor shall keep detailed well logs for all wells drilled. Information recorded on the well logs shall include the following:

1. Total depth of well.

2. Visual description of refuse at 10-foot intervals:

a. Type of refuse encountered including the estimated percentage of the following components (by volume) on visual inspection:

Paper/Cardboard Plastic Yard refuse Construction debris Textiles Tires Sludge Dirt

b. Moisture content (in percentages) based on the guidelines attached to the end of this Section.

c. State of decomposition based on the guidelines attached to the end of this Section.

d. Temperature of excavated refuse

3. Occurrence, depth, and thickness of water-bearing zones

4. , Length of slotted pipe and solid pipe below grade.

5. Thickness, description and depth from ground surface of backfill layers.

6. Length of above ground riser stick-up pipe.

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

LFG Extraction Wells and Wellheads 33 21 70-7

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

B. Contractor shall use the well borings description sheet provided at the end of this Section as a guideline for describing excavated materials.

C. Field copies of the well logs shall be provided to the Engineer at the end of each day.

D. Typed final copies ·of the well logs shall be submitted with the Record Drawings.

Handwritten logs will not be acceptable for submittal with the Record Drawings.

3.04 JOINING OF PIPES

A. Pipes shall be joined as specified in Section 33 51 10, Pipe and Pipe Fittings, Section 3.04 Part B.

1. Heat fusion joints shall be made in accordance with manufacturer's step by-step procedures and recommendations.

2. Mechanical joining shall be accomplished with HDPE flange adapters, neoprene gaskets, and ductile iron back-up flanges, and shall be used only where shown on the Drawings.

B. At the end of each day, Contractor shall cap the ends of all joined pipes longer than 20 feet to prevent entry by animals and debris.

3.05 BACKFILLING

A. Backfilling of the well shall commence immediately after well drilling is completed and the well piping has been installed in the borehole.

1. Backfill materials shall be placed carefully within the wells to the dimensions shown on the Drawings and as approved by the Engineer.

2. Tire chip and soil backfill containing foreign material may be rejected by the Engineer on the basis of a visual examination.

3. Both well piping and backfill shall be installed with a reinforcement grate installed over the boring. The reinforcement grate shall remain in place until backfill is within 2 feet of existing ground surface.

B. Gravel pack shall be bucket-poured through the reinforcement grate at a rate that shall not endanger the integrity of the well casing. Care shall be taken during backfilling to prevent bridging. Contractor shall keep record of number of bucket fills ~t each well.

C. Bentonite Plug shall be backfilled and hydrated in 6-inch lifts. The Contractor shall soak each lift according to the manufacturer's instructions prior to filling the next one. A minimum of 6 bags of bentonite shall be poured into the center of the borehole per 6-inch lift.

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

LFG Extraction Wells and Wellheads 33 21 70-8

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

D. Soil backfill shall be rodded in the boring to provide even distribution and compaction.

E. All material layer thicknesses shall be verified by taking measurements before, during, and after installation of each layer.

3.06 REFUSE DISPOSAL

The Contractor shall . dispose of excavated refuse as specified in Section 02 4-1 16-Refuse Handling, Storage, and Disposal.

3.07 TEMPORARY CAP

The Contractor shall temporarily cap the riser pipe of the vertical extraction well immediately after well pipe installation to prevent venting of LFG into the atmosphere.

The Contractor or Owner shall remove this cap during the installation of the wellheads.

Lag screws may be necessary due to the internal gas pressure within the well.

3.08 WELLHEAD INSTALLATION

A. Vertical extraction well and horizontal collector wellheads to be installed in accordance with manufacturer's recommendations. All pipe sections of the wellhead shall be air-tight. Any leaks shall be repaired by Contractor at no additional cost to the Owner. Refer to measurement and payment specification for applicable requirements for LFG Wellheads prior to purchasing and installing wellheads.

B. Install QED Solargliard flex hose on all wells. Hose should not have any sags, as shown on the Drawings. However, flexible hose shall not be taut. Provide enough slack to accommodate minor pipe settlement, as approved by the Engineer.

3.09 PNEUMATIC PUMPS

A. The pneumatic pumps shall bePneumatic Pump QED Model AP-4or equivalent.

Additional details for pneumatic pumps are in Section 33 21 80- Landfill Gas Collection System Appurtenances.

B. Prior to procuring pumps, the Contractor shall contact Owner's representative for the approval to purchase and install.

ATTACHMENT 33 21 70-1 Well Boring Log Template

END OF SECTION

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

LFG Extraction Wells and Wellheads 33 21 70-9

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

15% Dry Refuse

8: Rock, dirt, etc; no trace 6f

CD

g_ moisture C

: paper will be fuzzed up

ID

0:

f

'II:

"' • 1 ~ Litt e

SECTION 33 21 70 - 1

LANDFILL BOREHOLE AND WELL LOGGING GUIDANCE

20-25% Normal

Newspaper, etc; still not noticeably wet but normal moisture

Some

Moisture Content Scale

25-35% Damp

Paper shows dampness lawn clippings, tree branches, stiff & hold together

DecomJ!osition Scale

Moderate

35-50% Wet

Paper saturated but no free water, just getting sloppy;

water emanates when squeezed

Much

50% Saturated

Mud or free water present

Severe w-------------------------------------------------------------.1

0 m Newspaper readable; refuse

; looksnew C:

(Q

CD

~ Log the following (in 10-foot intervals):

Newspaper not legible;

branches intact

~ • Note apparent Intermediate cover thickness and presence of intermediate cell cover ~ • Ratio of refuse to cover soil Ill

~ • Degree of compaction (i.e., loose, moderate, tight) ~ • Composition description (i.e., household, garden, commercial, demolition, sludge, medical~ or other) ~ • Percent of refuse components (plastic, metal, yard waste, etc.)

~ • Note color and unusual odors or appearances ~ • Degree of decomposition g- • Percent of moisture

11<> • Approximate dates of refuse as an indicator (only) of dates of placement (i.e., newspaper, etc.)

~ • Refuse temperature ~ • Gas presence and relative pressure and temperature 1 • Presence of perched or free liquid

CD

~ • Note elevations and observations of changes in refuse/soil/liquid conditions X

"C Ill (/1 5·

Newspaper not legible;

crumble; black/brown mucky material

SECTION 33 21 80

LANDFILL GAS COLLECTION SYSTEM APPURTENANCES

PART 1 - GENERAL

1.01 GENERAL

A. The Contractor shall furnish all labor, materials, equipment and incidentals necessary to perform all work and services for complete installation of the landfill gas (LFG) collection system appurtenances as shown on the Drawings and as specified, in accordance with provisions of the Contract Documents.

B. The work shall include, but not necessarily be limited to valves, access risers, blind flanges, installation of pipe, fittings, and connections, abandonment of gas extraction wells and piping, as specified and as shown on the Drawings.

C. Materials shall not be incorporated in construction'until approved by the Engineer.

1.02 SUBMITT ALS

A. The Contractor shall notify the Owner of the source of all materials and shall furnish a representative sample for approval, at least 15 calendar days prior to the date of anticipated use of such material.

B. Warranty package will be submitted to Owner and Engineer for review and approval. All equipment specified in this Section shall be warranted by Manufacturer for a period of not less than one year from the date of acceptance.

PART 2 - PRODUCTS

2.01 PNEUMATIC PUMPS

A. Pumps shall be air displacement pumps, internally controlled and designed for leachate and condensate systems. Pumps shall be bottom loading with inlet screen.

B. The pneumatic pumps shall be Pneumatic Pump QED Model AP-4 or equivalent.

The pump shall have screens, casings and fittings, and a hose and hardware package with 1 inch discharge hoses, ½ inch air supply hose, and 5/8 inch pump exhaust line.

Augusta Engineering and Environmental Services Department LFG COLLECTION SYSTEM APPURTENANCES Deans Bride Road Landfill 2023 GCCS Expansion 33 21 80 -1

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

C. Performance and Configuration Requirements:

1. Leachate and Condensate Pumps:

a. Design Condition: Minimum of 5 gpm at 140 FT Total Dynamic Head(TDH).

b. Intake Configuration: Bottom loading, screened intake.

D. Accessories:

1. Pipe/tubing: Provide supply air and liquid discharge tubing of sufficient size, strength, and capacity for the pump.

2. Fittings: Provide stainless steel fittings appropriate for tubing connections.

3. All necessary fittings, flanges, etc., to connect pump(s) gas extraction wells, including the discharge of liquids removed into the liquid conveyance line.

4. Air and liquid conveyance hose lengths outside the gas extraction wells shall be field determined and approved by the Engineer.

5. Air intake kit/Assembly: Air filter regulator, Air inlet supply pressure gauge, Pump cycle counter.

2.02 WELL CAPS

A. The well caps shall be QED 8.:.inch well diameter wellheads and caps as specified in the Drawings.

2.03 SOURCE QUALITY CONTROL

A. Secure from the pump manufacturer the following inspections and tests on each pump before shipment from factory:

1. Check for compliance with Specification.

2. Test pump operation.

B. Factory test of head (FT) versus flow (gpm)

PART 3 -EXECUTION

3.01 INSTALLATION

A. Install pump in gas wells as specified by the Engineer and in accordance with pump manufacturer's recommendations. All pump installations shall be

Augusta Engineering and Environmental Services Department LFG COLLECTION SYSTEM APPURTENANCES Deans Bride Road Landfill 2023 GCCS Expansion 33 21 80 -2

Addendum 1 Bid Item #23-237 Deans Bridge Rd MSW Landfill Ph 3 Gas Collection & Control System Expansion completed only after measurement of liquid level in the well and getting approval from the ENGINEER for the depth of the pump.

B. Connect to air supply line with pressure regulator.

C. Connect discharge to condensate forcemain line.

3.02 FIELD QUALITY CONTROL

A. Provide services of equipment manufacturer's field service representative(s) to:

1. Inspect equipment covered by these Specifications.

2. Supervise pre-start adjustment and installation checks.

3. Conduct initial startup of equipment and perform operational checks.

4. Provide a written statement from manufacturer stating that manufacturer's equipment has been installed properly, started up and is ready for Operation by Owner's personnel.

END OF SECTION

Augusta Engineering and Environmental Services Department LFG COLLECTION SYSTEM APPURTENANCES Deans Bride Road Landfill 2023 GCCS Expansion 33 21 80 -3

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

PART 1 - GENERAL

1.01 DESCRIPTION

SECTION 33 51 10

PIPE AND PIPE FITTINGS

A. Scope of Work: The Contractor shall supply all materials, equipment~ and labor needed to install complete and make ready for use all pipe, pipe fittings, and valves as specified herein and as indicated on the Drawings.

B. Related Work Described Elsewhere

1. Section 31 20 00 - Excavating, Trenching, Backfilling and Grading

2. Section 33 21 70- LFG Extraction Wells and Wellheads

3. Section 33 21 80 - LFG Collection System Appurtenances

4. Section 44 42 60 ...:. Condensate Management System

1.02 SUBMITT ALS

A. Prior to commencement of construction, the Contractor shall prepare and submit to the Engineer, for review and approval, all manufacturer quality assurance certificates, and manufacturer's brochures containing complete information and instructions pertaining to the storage, handling, installation, inspection, maintenance, and repair of each type of pipe, pipe fitting, and valve furnished.

B. The Contractor shall prepare and submit Shop Drawings to the Engineer for review and approval. The Shop Drawings shall show the following:

1. All dimensions, slopes, and invert elevations at connections to existing pipes.

2. All tie-ins to the existing leachate collection system shall be field-verified and shown on the Shop Drawings. This shall include pipe size and burial depth at a minimum.

3. Pipe Dimensions for each pipe size used:

a. Average outside diameter.

b. Average inside diameter.

c. Minimum average wall thickness.

4. Each pipe and fitting size to be used.

C. The Contractor shall submit all field pressure testing results to the Engineer for approval.

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

PIPE AND PIPE FITTINGS

33 5110-1

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

1.03 MANUFACTURER'S QUALITY ASSURANCE

A. The pipe and fittings manufacturer shall have an established quality assurance program responsible for inspecting incoming and outgoing materials and assuring the long-term performance of materials and products.

B. The pipe and fitting manufacturer shall maintain permanent quality control and quality assurance records.

1.04 REFERENCE

The publications listed below form a part of this specification to the extent referenced.

The publications are referred to in the text by basic designation only. Use of the most recent version is required.

AMERICAN SOCIETY FOR TESTING AND MATERIALS (ASTM)

ASTMD 1248

ASTMD 1784

ASTMD 1785

ASTM D 2321

ASTMD2241

ASTMD2467

ASTM D 2513

ASTMD2564

ASTMD2774

Standard Specification for Polyethylene Plastics Molding and Extrusion Materials

Standard Specification for Rigid Poly (Vinyl Chloride) (PVC) Compounds and Chlorinated Poly (Vinyl Chloride) (CPVC) Compounds

Standard Specification…