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2.3. GEONET DRAINAGE GEOCOMPOSITE
A. Material Description
1. Geonet Drainage Geocomposite shall consist of a geonet to which a
geotextile has been heat-bonded to both sides.
2. The geonet shall be manufactured of high-density polyethylene.
3. The geotextile shall be needle-punched, nonwoven, short synthetic staple
polypropylene or polyester fibers

B. Geonet Drainage Geocomposite Properties
1. The components of the Multi-Linear Drainage Geocomposite specified

shall meet or exceed the values provided in the table below.

MANUFACTURING QUALITY CONTROL TEST REQUIREMENTS

CHARACTERISTIC | STANDARD | UNIT | | MARV
Geonet Properties
Core Net Thickness ASTM D5199 mils 2250
Resin Specific Gravity ASTM D1505 g/cm? 0.94
Resin Melt Index ASTM D1238 g/10 min <1.1
Tensile Strength ASTM D7179 Ib/in.
Carbon Black Content ASTM D4218 % 2 to 3
Geotextile Properties (each component)
Mass Per Unit Area ASTM D5261 g/m? (oz/yd?) 270 (8)
Grab Tensile Strength ASTM D4632 N (Ib) 979 (220)
Trapezoidal Tear Strength ASTM D4533 N (lb) 400 (90)
Puncture CBR ASTM D6241 N (Ib) 2670 (600)
AOS(@) ASTM D4751 mm (US sieve) | <0.18 (80)
Permittivity ASTM D4491 sec! 21.26
Geocomposite Properties
Transmissivity (2) ASTM D4716 m2/sec
Ply Adhesion ASTM D7005 lb/in. 1.0

Notes:

(1) Maximum Average Value.

(2) Measured at a minimum seating time of 100 hours, with a test section including Drainage Sand
above the Drainage Geocomposite and textured 60-mil textured HDPE below, using a gradient
of 0.1 under a compressive stress of 12,000 psf for 100 hours.

2.4 TIES (for Geonet Drainage Geocomposite only)

A. Ties used to secure adjacent sheets of Geonet shall be plastic fasteners or

polymer braid and shall meet the approval of ENGINEER. Metallic ties shall not
be allowed. Ties shall be yellow or white to facilitate inspection.

File No. 3066.09 Drainage Geocomposite 02520 - 3 of 5 December 2017

2.5 THREAD

A.

Thread used to seam the geotextile shall be polymer material with chemical
resistance properties equal to or exceeding those of the geotextile. The thread
shall be different color than the geotextile.

PART 3 - EXECUTION

3.1 INSTALLATION

A.

Drainage Geocomposite shall not be stockpiled or stored within the limits of
the area to be lined.

Drainage Geocomposite shall be installed in accordance with manufacturer’s
recommendations, and as shown on the Drawings and specified herein. If a
Drainage Geocomposite with a preferential flow direction is used, it shall be
installed oriented with the preferential flow direction perpendicular to the
contours unless otherwise approved by ENGINEER.

Care shall be taken to keep the Drainage Geocomposite clean prior to
installation.

Folds or excessive wrinkling of deployed Drainage Geocomposite shall be
removed to the extent practicable. CONTRACTOR shall exercise care not to
entrap stones, excessive dust, or foreign objects in the material. Drainage
Geocomposite shall be adequately weighted, using sand bags or equivalent
until the Drainage Sand and Crushed Gravel cover is placed.

Adjacent sheets of Drainage Geocomposite shall be overlapped a minimum of 4
inches, and shall be secured using ties, if appropriate for the material used,
placed at intervals no greater than 5 feet. Additional ties spaced at intervals
not exceeding 2 feet shall be used on seams running across slopes and located
in anchor trenches. Spot welding of the Drainage Geocomposite to the
geomembrane shall not be allowed.

The upper geotextile on adjacent panels of Drainage Geocomposite shall be
sewn together with a continuous seam in the field prior to placement of
overlying soil. All seams on sideslopes shall be oriented parallel to the slope.
The adjacent sheets of geotextile shall be overlapped a minimum of 6 inches
prior to seaming. All overlaps shall be such that the upslope sheet is placed
over the downslope sheet. No holes in the upper geotextile will be allowed. All
tie holes at horizontal seams shall be covered with a leistered nonwoven
geotextile patch.

File No. 3066.09 Drainage Geocomposite 02520 - 4 of 5 December 2017

G. Drainage Geocomposite shall not be exposed to ultraviolet rays for more than
fourteen (14) days before being covered. CONTRACTOR shall place Drainage
Sand over the Drainage Geocomposite as specified in Section 02200 and in
such a manner as to ensure the Drainage Geocomposite is not damaged.

[END OF SECTION 02520]

P:\3000s\3066.09\Source Files\Type 11 App\Specifications\Division 2 Specifications\02520 Geocomposite.docx

File No. 3066.09 Drainage Geocomposite 02520 - 5 of 5 December 2017

SECTION 02530
GEOSYNTHETIC CLAY LINER
PART 1 - GENERAL
1.1. SCOPE OF WORK

A. Furnish all labor, materials, tools, and equipment and perform all operations
necessary to furnish, deploy, and install Geosynthetic Clay Liner (GCL) in the
areas indicated on the Drawings or as required by the ENGINEER or OWNER.

1.2 SUBMITTALS

A. CONTRACTOR shall submit to ENGINEER certification that the materials meet
the required specifications and the manufacturer's instructions for handling
and installing the material, at least ten days prior to delivery of materials to the
site.

1.4 QUALITY ASSURANCE
A. CONTRACTOR shall be trained and experienced in field handling, storing,
deploying, and installing GCL. Alternatively, CONTRACTOR shall engage an

experienced subcontractor who shall meet the experience requirements.

B. GCL shall be sampled and testing in accordance with the approved Construction
Quality Assurance (CQA) plan.

1.5 MATERIAL STORAGE AND HANDLING

A. All rolls shall be labeled and bagged in packaging that is resistant to
degradation by ultraviolet (UV) light.

B. CONTRACTOR shall be responsible for the handling, storage, and care of the
GCL from the time of delivery to the site until final acceptance of the completed
work by OWNER. CONTRACTOR shall be liable for all damages to the materials
during such time.
C. The GCL shall be stored in a dry location and off the ground.
PART 2 - PRODUCTS
2.1 GCL

A. The GCL shall consist of a continuous layer of sodium bentonite sandwiched
between a woven geotextile carrier layer and a nonwoven geotextile cover
layer and reinforced with needle punched fibers.

File Na 2NkA NG Gencunthetic Claw Liner 12920 — 1 af? Neremher 2117

The sodium bentonite components shall be 90 percent montmorillonite (from
Wyoming) and shall be applied to the base carrier sheet at no less than 1
pound/square foot.

Carrier sheets shall be woven polypropylene (3.1 0z/yd? minimum), and
nonwoven polypropylene (6 oz/yd2 minimum).

The sodium bentonite shall have a permeability no greater than 5x10-? cm/sec
at 5 psi confining pressure and 2 psi head.

PART 3 - EXECUTION

3.1

INSTALLATION

A.

GCL shall be installed in accordance with the manufacturer's
recommendations, and as shown on the Drawings and specified herein.

GCL shall be deployed over prepared and approved subgrade as soon as
practicable after completion of subgrade preparation. The material shall be
placed so as not to cause subgrade disturbance with the carrier side in contact
with the Drainage Sand. GCL shall not be deployed through standing water or
during rainfall. Care shall be exercised to ensure that no large stones or foreign
objects are trapped beneath the GCL.

CONTRACTOR shall only deploy GCL in an area that can be completed in one
day. Completion includes deploying, seaming, and covering with
Geomembrane. If inclement weather is approaching or is present, no
additional GCL shall be placed until the previously placed GCL is covered with
Geomembrane and seamed. GCL that becomes wet and hydrates shall be
removed and replaced at the discretion of ENGINEER at no additional cost to
OWNER.

Adjacent sheets of GCL shall be overlapped a minimum of 6 inches. A
continuous bead of granular sodium bentonite shall be applied between all
overlapping edges of material. On sideslopes, seams shall be perpendicular to
the contours. Seams shall be made in accordance with the manufacturer's
recommendations. Wrinkles and creases shall be removed from a sheet prior
to deploying and overlapping the adjacent sheet. CONTRACTOR shall clean all
dirt and debris from contacting surfaces.

Where cuts are required during installation, the exposed surfaces shall receive
powdered bentonite and be slightly hydrated.

All holes, tears, and cuts in the GCL shall be recorded and repaired in
accordance with the manufacturer's recommendations or as specified by
ENGINEER.

[END OF SECTION 02530]

P:\3000s\3066.09\Source Files\Type II App\Specifications\ Division 2 Specifications\02530 GCL.docx

Filo Na 2N6A NG Gensunthetir Clay Liner A292N — 2 af? Neremher 7117

SECTION 02550
GEOMEMBRANE
PART 1 - GENERAL
1.1. SCOPE OF WORK

A. CONTRACTOR shall furnish all labor, materials, tools, equipment, and
incidentals, and perform all operations necessary to furnish, deploy, seam, and
test the textured, high-density polyethylene (HDPE) Geomembrane
(Geomembrane) as described in this Specification and where indicated in the
Drawings.

1.2 DEFINITIONS

A. Geomembrane Manufacturer: The party responsible for the manufacturing of
the Geomembrane liner material.

B. Installation Contractor: The Installation Contractor shall be the Geomembrane
Manufacturer or a contractor approved by the manufacturer to install the
Geomembrane Manufacturer’s Geomembrane and who is trained and
experienced in field handling, storing, deploying, seaming, and QC testing of
Geomembrane for landfill applications.

C. Lot: A quantity of resin (usually the capacity of one rail car) used by the
Geomembrane Manufacturer. Each finished roll of Geomembrane will be
identified by a roll number traceable to the resin lot used.

D. Panel: Unit of GGomembrane seamed in the field and is larger than 100 square
feet (ft2).

E. Patch: Unit of Gomembrane seamed in the field and is smaller than 100 ft2.

F. CQA Consultant: OWNER will engage a CQA Consultant to verify the quality of
raw materials, the integrity and quality of seams and seaming processes
performed on-site, and the locations and results of all testing and repair work
performed. The CQA Consultant will observe and document the work, and in
particular, the quality control testing performed by the Installation Contractor.

H. Quality Control (QC): The Geomembrane Manufacturer shall implement QC
measures to ensure that the Gcomembrane provided meets the Specifications
provided herein. The Installation Contractor shall implement QC measures to
ensure Geomembrane installation is complete and is in compliance with the
Specifications contained herein. QC procedures include, but are not limited to
providing the Geomembrane Manufacturer's material QC certifications;
providing experienced and competent field staff; performing adequate

File No. 3066.09.00 Geomembrane 02550 - 1 of 14 December 2017

personnel training; performing QC testing during Geomembrane installation;
and maintaining records documenting QC items, such as, as-built panel layout,
locations and identifications of all repairs, locations and results of all
destructive and non-destructive field tests, as specified herein.

G. Subgrade Surface: The soil surface that immediately underlies geosynthetic
material.

1.3. SUBMITTALS

A. CONTRACTOR shall submit with the Bid for the Work the following

information.
1. Installation Contractor qualifications, including project descriptions with
references.

2. Brand of Geomembrane to be used, and a statement from the
Geomembrane Manufacturer detailing its properties and composition,
and a description of the GGomembrane Manufacturer’s QC program.

3. Draft warranties regarding quality of workmanship, materials, and long-
term performance of the GGoomembrane.

B. At least 15 days prior to manufacturing the proposed Geomembrane,
CONTRACTOR or Geomembrane Manufacturer shall submit the proposed
manufacturing dates for the rolls to be utilized. The Geomembrane
Manufacturer will coordinate with the CQA Consultant so that a representative
may be present to observe the manufacturing of the GGomembrane to be used
on the project.

C. No more than 15 days after the Notice of Award, the Installation Contractor
shall submit the following:

1. Shop Drawings showing extent, sizes, panel identification numbers, and
details of the Geomembrane installation, including recommendations for
terminating the material and proposed methods of sealing around
penetrations if different from those shown on the Drawings. Except for
special requirements due to configuration and/or terminating the
Geomembrane, maximum use of large-size panels shall be made.

2. Superintendent qualifications.

3. QC plans detailing proposed QC procedures.

4. The Geomembrane Manufacturer’s certification that the resin used meets
the Specifications. The QA/QC certificates issued by the Geomembrane
Manufacturer and the resin supplier shall be provided.

5. Samples ofall materials shall be submitted for inspection and acceptance.

D. Prior to shipping the Geomembrane from the factory, CONTRACTOR shall
provide the roll certifications to the CQA Consultant.

E. Prior to deploying Geomembrane, the Installation Contractor shall provide a
letter to the CQA Consultant indicating the acceptance of the Subgrade Surface.

File No. 3066.09.00 Geomembrane 02550 - 2 of 14 December 2017

During the course of the work, the Installation Contractor shall maintain as-
built drawings showing, but not limited to, panel layout and identification,
seam type and identification, repair locations and identifications, and
destructive test sample locations and identification. The Installation
Contractor shall submit working copies of the as-built drawings to the CQA
Consultant upon request, and shall submit a final copy to ENGINEER prior to
moving off the site.

1.4 QUALIFICATIONS OF INSTALLATION CONTRACTOR AND MANUFACTURER

A.

To perform the work of this Specification, the Installation Contractor shall have
demonstrated by previous experience its ability to do the Work. The required
previous experience shall consist of the following:

1. The Installation Contractor shall be approved and/or licensed to install
the products by the GGomembrane Manufacturer.
2. The Installation Contractor shall have _ successfully — installed

Geomembrane for not less than ten projects, or GGomembranes totaling a
minimum of 2,000,000 ft? similar in type to that specified herein, now
giving satisfactory service in the United States.

3. The Installation Contractor shall provide documentation for at least three
similar Gcomembrane projects of at least 200,000 ft? in continuous area.

The Geomembrane Manufacturer shall have manufactured and fabricated not
less than 10,000,000 ft? of GGomembrane similar to that specified herein.

The Installation Contractor shall provide the services of a competent field
technical representative throughout the installation of the Geomembrane and
all appurtenant structures and soils contacting the Geomembrane. The field
technical representative shall remain on-site and be responsible throughout the
installation of the Gcomembrane for Gcomembrane layout, seaming, patching,
testing, repairs, and other activities of the Installation Contractor. The field
technical representative shall have personally supervised and directed the
installation of a minimum of 2,000,000 ft? of GGomembrane.

All personnel performing seaming operations shall be qualified by experience
and by successfully passing seaming tests. At least one seamer shall have
experience seaming a minimum of 1,000,000 ft? of Gomembrane with a similar
method. This “Master Seamer” will provide direct supervision over less
experienced seamers; no seaming will take place without a Master Seamer
present.

All field seams shall be inspected over their full length in accordance with these
Specifications by the Installation Contractor in the presence of the CQA
Consultant or the CQA Consultant’s representative.

File No. 3066.09.00 Geomembrane 02550 - 3 of 14 December 2017

F. The manufacturer shall furnish complete written instructions for storage,
handling, installation, seaming, repair, and inspection of the Geomembrane
material in compliance with this Specification and conforming to the conditions
of the warranty. A copy of all manufacturer’s literature shall be submitted to
the CQA Consultant upon request.

1.5 PROJECT MEETINGS

A. A _ preconstruction meeting is required between OWNER, ENGINEER,
CONTRACTOR, the CQA Consultant, and the Installation Contractor, prior to the
start of GGomembrane installation work on-site. The intent of the meeting is to
discuss the requirements of these Specifications to ensure that all parties
involved are familiar with their respective responsibilities.

B. The Installation Contractor shall attend other construction meetings that may
be held during the installation of the geosynthetics associated with the project.
These meetings will be held to review work activities, discuss the project
schedule, provide clarifications, and review possible questions.

1.6 QUALITY ASSURANCE

A. OWNER will retain a the CQA Consultant to perform construction quality
assurance services during the GGomembrane installation. The CQA Consultant
shall be on-site for observation of GGomembrane handling, deploying, seaming,
testing, and repair work.

B. The Installation Contractor shall cooperate with the CQA Consultant, and
furnish tools, samples of materials, and assistance as requested.

C. The Installation Contractor shall apprise the CQA Consultant of the proposed
work schedule on a daily basis, and shall inform the CQA Consultant of schedule
changes in a timely manner.

D. The Installation Contractor shall advise ENGINEER and the CQA Consultant
before placing orders for Gcomembrane, so that arrangements may be made, if
desired, for inspection of the Geomembrane during manufacturing. The
Installation Contractor shall at all times furnish the CQA Consultant and its
representatives facilities, including labor, and allow proper time for observing
and testing materials and workmanship. The Installation Contractor shall allow
time in the schedule for possible delays due to the necessity of materials and
workmanship being observed, tested and accepted for use. The Installation
Contractor shall furnish, at his/her own expense, all samples of materials
required by ENGINEER or the CQA Consultant for testing.

E. Geomembrane shall be sampled and tested in accordance with the approved
Construction Quality Assurance (CQA) Plan.

File No. 3066.09.00 Geomembrane 02550 - 4 of 14 December 2017

performance of work terminated, abandoned, or suspended under the notice, assign to
the City of Nashua any orders or sub contracts specified in the notice, and revoke
agreements specified in the notice.

5. Notresume work after the effective date of a notice of termination unless and until receipt
of a written notice from the City of Nashua to resume performance.

In the event of a termination for cause, Professional Engineer shall receive all amounts due and not
previously paid to Professional Engineer for work satisfactorily completed in accordance with the
contract prior to the date of the notice, less all previous payments. No amount shall be allowed or
paid for anticipated profit on unperformed services or other unperformed work. Any such payment
may be adjusted to the extent of any additional costs occasioned to the City of Nashua by reasons
of Professional Engineer's failure. Professional Engineer shall not be relieved of liability to the City
of Nashua for damages sustained from the failure, and the City of Nashua may withhold any
payment to the Professional Engineer until such time as the exact amount of damages due to the
City of Nashua is determined. All claims for payment by the Professional Engineer must be
submitted to the City of Nashua within 30 days of the effective date of the notice of termination.

If after termination for the failure of Professional Engineer to adhere to any of the terms and
conditions of the contract or for failure to satisfactorily, in the sole opinion of the City of Nashua.
to complete or make sufficient progress on the work in a timely and professional manner, it és
determined that Professional Engineer had not so failed. the termination shall be deemed to have
been a termination at will. In that event, the City of Nashua shall, if necessary, make an adjustment
in the compensation paid to Professional Engineer such that Professional Engineer receives total
compensation in the same amount as it would have received in the event of a termination-at-will.

€. GENERAL PROVISIONS FOR TERMINATION Upon termination of the contract, the City of
Nashua may take over the work and prosecute it to completion by agreement with another party or
otherwise. In the event Professional Engineer shall cease conducting business, the City of Nashua
shall have the right to solicit applications for employment from any employee of the Professional
Engineer assigned to the performance of the contract.

Neither party shall be considered in default of the performance of its obligations hereunder to the
extent that performance of such obligations is prevented or delayed by any cause, existing or future,
which is beyond the reasonable control of such party. Delays arising from the actions or inactions
of one or more of Professional Engineer's principals, officers, employees. agents, subcontractors,
consultants, vendors, or suppliers are expressly recognized to be within Professional Engineer's
control.

DISPUTE RESOLUTION The parties shall attempt to resolve any dispute related to this contract as
follows. Either party shall provide to the other party, in writing and with full documentation to
verify and substantiate its decision, its stated position concerning the dispute. No dispute shall be
considered submitted and no dispute shall be valid under this provision unless and until the
submitting party has delivered the written statement of its position and full documentation to the
other party. The parties shall then attempt to resolve the dispute through good faith efforts and
negotiation between the City of Nashua Representative and a Professional Engineer Representative.
At all times, Professional Engineer shall carry on the work under this contract and maintain and
complete work in accordance with the requirements of the contract or determination or direction of
the City of Nashua. If the parties are unable to resolve their dispute as described above within 30
days, the parties’ reserve the right to pursue any available legal and/or equitable remedies for any
breaches of this contract except as that right may be limited by the terms of this contract.

. NO DAMAGES FOR DELAY Apart from a written extension of time, no payment, compensation, or

adjustment of any kind shall be made to Professional Engineer for damages because of hindrances
or delays in the progress of the work from any cause, and Professional Engineer agrees to accept

GC 5 of Il