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Board of Aldermen — 9/26/17 Page 17

NEW BUSINESS — ORDINANCES

O-17-045
Endorsers: Mayor Jim Donchess
Alderman Ben Clemons
Alderman-at-Large Lori Wilshire
Alderwoman Mary Ann Melizzi-Golja
Alderman Tom Lopez
MOVING PARKING ENFORCEMENT TO THE OFFICE OF ECONOMIC DEVELOPMENT IN THE
MAYOR’S OFFICE
Given its first reading; assigned to the PERSONNEL/ADMINISTRATIVE AFFAIRS COMMITTEE by
President McCarthy

PERIOD FOR GENERAL PUBLIC COMMENT
Jeff Daly, 74 Walden Pond Drive

Coming back to your blue copy, the wording | agree with Alderman Moriarty. You leave a lot of people out. |
think if you add in representing a full and diverse cross-section to cover everything, and then leave it to the
Mayor and the President to set it in place.

Mayor, | had a long conversation with the Surface Railroad people today. | think this city should work with them
very, very closely. We've got the piece of property down on Crown Street that would be ideal as a parking lot
and train station. They’ve got long term plans, and one of them actually is looking at now is going from here out
to Milford to Bennington. There are over 1,000 vehicles a day traveling in and out of Milford, which we would
probably get 25 — 30 percent off the road if the pricing was right. That gets our greenhouse gases here in
Nashua down below the national level. The next thing we’ve got to do is get the people off the highways on the
weekend going north. | hate to say it, our X-Governor Sununu does not want his Peter Pan buses disturbed.
That is something that this city needs to be aware of. It may be coming out of his pocket, but he’s got plenty of
other bus routes that he could provide service to.

The other thing is Burke Street. What’s happening with the Department of Public Works not moving there?
Now I’m hearing all sorts of numbers of renovation in the millions, tens of millions of dollars. Please do not use
our favorite engineering and construction people. This city has lost a lot of money to these people, and they’ve
got rich. There is no accountability. I’ve just finished a job down in New Jersey, and the State Attorney's
General’s Office is looking into overpricing and corruption. Myself and three other people reported it. We've
got to look after what we’re doing here. That building, and | know it because it’s the old Benoit Facility. It’s got
floors that are eight feet thick, ten feet wide, 52 feet long where they had the big turning mills. They want to
take jack hammers and cut that out so they can put in a drain. That’s going to cost a fortune. There is new
technology the engineering department in this city has to be looking at. One of them, | have already told
numerous times, is using dry ice to remove graffiti from all the various walls that have been marked up by the
kids. It can be done in about five seconds and the DPW can do it themselves. You don’t have to get a
contractor in to do it. You don’t have to have a HazMat company come in and clean all the grit off the floor.
We've got to start looking at modern technology, ladies and gentlemen.

There is technology coming over from Europe, and | hate to say it, nobody in the DPW wants to look at it.
We've done it that way for years. You’ve got a major problem down at the Four Hills Landfill. You’ve got two
wells measuring PFOA and PFOS and they are going into the main wastewater plant of the city. Why isn’t that
being cleaned up? Why isn’t it being filtered? Oh, we don’t have the technology. Yes, we do. Nobody asks.
Nobody goes out and looks.

The city owns Pennichuck Water. Go out on Route 101, up beyond PC Connection, there a turning that goes
across the railroad crossing. There are three barrels down there when they first started testing that registered
7-10 parts per trillion. One of those wells is now up to 54 parts per trillion, ladies and gentlemen, and it’s within
9 feet of the Pennichuck brook. The Pennichuck Water Works do not check the water quality for PFOA and

3.5

other defects shall extend a minimum of 6 inches beyond the edges of the defect.
All corners of patches shall be rounded with a radius of at least 3 inches.

TRIAL SEAM TESTING

A.

Trial seams shall be performed with each seam welder at the beginning (start of
shift) of each day, and at the beginning of each period after which the welder has
been turned off or disconnected from its power supply, or has been idle for 30
minutes (extrusion welder) or 60 minutes (hot wedge welder), and after any
change in operator personnel on a welder, after 5 hours of continuous seaming,
or at any other time deemed necessary by the CQA Consultant.

The Installation Contractor is responsible for providing and operating an on-site
tensiometer and corresponding sample cutting equipment to perform all trial
and field seam testing.

Trial seams shall be produced under the same physical conditions as production
seaming.

Trial seam sample testing:

1. Trial seams shall be a minimum of 5 feet long and 12 inches wide
(perpendicular to the seam).

2. One-inch wide samples shall be cut perpendicular to the seam and tested
according to ASTM D6392 in a tensiometer for bonded seam strength
(shear) and peel adhesion.

3. Two (2) samples will be tested for shear and peel (4 peel tests total for
fusion welds as both edges of the weld must be tested). All tests must pass
for an acceptable trial seam.

4. Each sample failure must consist ofa ductile break that is film tearing bond
and must meet the strength requirements of the following table:

Property Test Method Minimum Value
Peel Strength Fusion ASTM D6392 60 lb/in
Peel Strength Extrusion ASTM D6392 52 lb/in
Shear ASTM D6392 80 Ib/in

If a trial seam test fails, then another trial seam shall be performed and tested.
If the second trial seam fails, then the seam welder shall not be used until it is
repaired or faulty conditions are corrected, and two trial seams pass the
destructive tests.

A record of the date, time, ambient weather conditions, test results, operator,
and equipment number shall be kept by the Installation Contractor, and
submitted to the CQA Consultant.

File No. 3066.21 Geomembrane 02550 - 8 of 10 January 2021

3.6 INSTALLATION CONTRACTOR QC TESTING

A. The Installation Contractor shall non-destructively test the full length of all
seams to ensure watertight, homogeneous seams. Test methods shall consist of
vacuum box testing, air-pressure testing of double-fusion seams, or other
methods approved by the manufacturer and the CQA Consultant. The test shall
be performed as work progresses, rather than at the completion of all field
seaming.

B. Vacuum box testing shall be performed on extrusion welds using a vacuum box
with a rigid housing, transparent viewing window, a soft rubber gasket on the
bottom edge, and a valve assembly with a vacuum gauge. The vacuum box must
be approved by the CQA Consultant prior to use. The CQA Consultant has the
right to reject any vacuum box that he feels may not provide accurate results.

C. Vacuum box testing shall be performed by applying a soap-and-water solution
to the seam and placing the box over the seam so a leak-tight seal is obtained,
applying a vacuum of 5 psi to the box. The seam shall be examined through the
viewing window for at least 10 seconds by the CQA Consultant for the presence
of soap bubbles. If soap bubbles are detected in the viewing window, the
location will be marked and repaired in accordance with these Specifications.
Vacuum testing shall be performed in accordance with ASTM D5641.

D. Air pressure testing shall be performed on double-fusion seams having an air
channel between the seams. Both ends of the seam shall be heat-sealed and a
hollow needle with a pressure gauge and valve attached shall be inserted into
the air channel. A pump shall be attached to the needle and an air pressure of
25 psi shall be applied to the air channel. The valve shall be closed and the
pressure shall be observed for a minimum of 5 minutes. If the pressure drops
more than 2 psi or doesn’t stabilize, then the defective area shall be located,
marked, and repaired in accordance with these Specifications. After completing
the air pressure test, the needle shall be removed and the hole shall be sealed
and tested with the vacuum box. The CQA Consultant shall witness the entire
test, including the release of pressure or vacuum, to monitor for a defective
pressure or vacuum gauge. Air pressure testing shall be performed in
accordance with ASTM D5820.

E. Destructive testing of seam samples is not required.
3.7. FINALINSPECTION

A. A final inspection shall be performed by the Installation Contractor, the CQA
Consultant, ENGINEER, and OWNER prior to the Installer’s crew demobilizing
from the site. All identified problem areas shall be repaired by the Installation
Contractor and accepted by the CQA Consultant prior to the installation crew
demobilizing from the site.

File No. 3066.21 Geomembrane 02550 - 9 of 10 January 2021

[END OF SECTION 02550]

P:\3000s\3066.2 1\Source Files\Tech Specs\ Division 2 Specifications\Section 02550 Geomembrane.docx

File No. 3066.21 Geomembrane 02550 - 10 of 10 January 2021

SECTION 02560
LANDFILL GAS EXTRACTION WELLS
PART 1 - GENERAL
11 SCOPE OF WORK

A. Supply all equipment, materials, and labor needed to install landfill gas
extraction wells as specified herein and as indicated on the Drawings.

12 SUBMITTALS

A. CONTRACTOR shall submit to ENGINEER 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.

B. CONTRACTOR shall submit to ENGINEER test results of all well backfill
materials furnished.

C. CONTRACTOR shall submit to ENGINEER well logs within 7 days of the
completion of well installations.

1. The well logs shall depict a construction diagram for each well drilled,
including the total depth of the well, the temperature of soils, depth,
thickness, and description of soil or waste strata, and the occurrence of any
water bearing zones.

13 SITE CONDITIONS

A. Obstructions and saturated conditions such as sludges, and foundry sands are
sometimes encountered when drilling in landfills, many of which can be drilled
through. CONTRACTOR is expected to make reasonable effort to drill through
obstructions and saturated conditions and will be paid for offset redrilling and
boring abandonment only with prior written approval from OWNER.

B. Well drilling shall be performed on a level surface. CONTRACTOR shall
provide a level surface at each drilling location as required. The size of the
level area shall be acceptable to the drilling subcontractor. Any soil placed to
level the drilling location shall be removed following well installation.

PART 2 - PRODUCTS
2.1 STONE AGGREGATE

A. Stone Aggregate shall be hard, durable, and resistant to weathering and to
water action, free from overburden, spoil, and organic materials. Stone

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Specification 02560 - Landfill Gas Extraction Wells

January 2021

Page 2 of 4
3066.21

Aggregate shall be washed, and uniformly blended according to the particle
size distribution requirements shown below.

Sieve Size Percent Passing by Weight
2-inch 100
1%-inch 90 - 100
1-inch 30 - 40
%4-inch 10-15
¥Y-inch 0-5
¥s-inch 0-5

2.2 BENTONITE SEAL

A. Bentonite seals shall be installed where shown on the Drawings using a hydrated
bentonite slurry mix poured into place.

2.3 SAND/GRAVEL FILTER

A. Sand/gravel filter shall conform to the following particle size distribution.

Sieve Size Percent Passing by Weight
1%-inch 100
No. 4 70 - 100
No. 40 30 - 80
No. 200 0-15

2.4 PVC PIPE

A. Refer to Specification Section 15212.

2.9 WELLHEAD

A. Wellheads shall be 2-inch QED Precision Quick-Change™ Orifice Plate Wellhead,
or equivalent approved by ENGINEER. The wellhead components are indicated
on the Drawings.

B. Wellhead and flow measurement tube shall be compatible with the
CES/LANDTEC GEM-2000™ and GEM-5000™ Landfill Gas Monitors.

PART 3 - EXECUTION

3.1

DRILLING

A. OWNER or ENGINEER shall observe all drilling operations.

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Specification 02560 - Landfill Gas Extraction Wells Page 3 of 4

January 2021

3066.21

B.

Wells shall be drilled to the minimum diameter and the specific depths shown on
the Drawings. CONTRACTOR shall drill the wells using bucket-type augers and
dry drilling equipment; wet rotary drilling equipment may not be used.

Well depths shown on the Drawings are estimated based on projected top of
waste elevations and may be adjusted in the field by ENGINEER. At no time shall
the drilling extend deeper than the bottom of well screen elevation.

If water is encountered in a borehole, then CONTRACTOR may be directed to
drill beyond the point that it was encountered. If wet conditions remain, then
drilling may be terminated and the length of perforated pipe adjusted by
ENGINEER, or the well may be relocated. If wet conditions cease (e.g., due to
trapped water layer), then drilling will continue to the design depth.

As soon as drilling is completed, a safety screen shall be placed over the top of
the borehole. This screen shall stay in place until backfilling is within 4 feet of
the surface. Safety screen size should be large enough to accommodate all
backfill materials and any tools used during backfill yet not large enough for any
human to accidentally fall through.

Wells shall be drilled straight and plumb and the well pipe shall be installed in
the center of the borehole. CONTRACTOR will take all compression off of the
pipe by mechanical means and center the pipe in the middle of the borehole
before starting to backfill.

PVC well pipe shall be solvent cemented and mechanically fastened with
stainless steel fasteners.

CONTRACTOR shall not leave boreholes open over night, if a bore hole is started
a well shall be constructed within the borehole prior to CONTRACTOR leaving
the site.

CONTRACTOR shall provide odor control during construction activities. Odor
control measures shall be approved by OWNER prior to use.

3.2 BACKFILLING

A.

Backfilling the borehole shall commence immediately after drilling is completed
and the PVC pipe has been installed. Backfill materials shall be installed as
indicated on the Drawings and as approved by ENGINEER.

Stone Aggregate shall be poured or scooped through the safety screen at a rate
that will not endanger the integrity of the well casing and limits the potential for

bridging.

The Sand/Gravel Filter shall be poured through the safety screen until a layer at
least 1-foot thick above the Stone Aggregate is formed.

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Specification 02560 - Landfill Gas Extraction Wells Page 4 of 4
January 2021 3066.21

D. The Bentonite Seal will be formed by evenly distributing bentonite around the
annulus of the well until a minimum plug thickness of 1 foot has been achieved.

3.3 DISPOSAL

A. Waste from well drilling operations shall be hauled to the active face of the
landfill operation the same day it is excavated.

[END OF SECTION 02560]

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CONTENTS

DIVISION 15 - MECHANICAL

Section 15210 - High-Density Polyethylene Pipe (HDPE), Fittings, and Appurtenances
Section 15212 - Polyvinyl Chloride (PVC) Pipe and Fittings

P:\3000s\3066.21\Source Files\Tech Specs\ Division 15 Specifications\00000 Divison 15 Table of Contents.docx

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SECTION 15210
HIGH-DENSITY POLYETHYLENE (HDPE) PIPE, FITTINGS, AND APPURTENANCES
PART 1 - GENERAL
1.1 SCOPE OF WORK

A. Furnish and install HDPE pipe and fittings for the landfill gas collection and
control system (GCCS), condensate main, and the compressed air supply.

B. Pressure test solid HDPE pipe.
1.2 DELIVERY, STORAGE, AND HANDLING

A. The pipe and fitting manufacturer shall package products for shipment in a
manner suitable for safe transport by commercial carrier. When delivered,
CONTRACTOR shall inspect the shipment and report any damage to the pipe and
fittings manufacturer. Pipe and fittings shall be handled, installed, and tested in
accordance with the Manufacturer’s recommendations, and the requirements of
this Section.

B. Pipe Storage:

1. Store or stack pipe to prevent damage from marring, crushing or puncture.
Limit maximum stacking height to 6 ft or the Manufacturer’s recommended
maximum height, whichever is less.

2. Store in accordance with the Manufacturer’s recommendations.

C. Pipe Handling:
1. Protect pipe from excessive heat or harmful chemicals.
2. Handle pipe and use equipment needed to avoid gouging of the pipe surfaces.

1.3 SUBMITTALS

A. CONTRACTOR shall submit to ENGINEER a Certificate of Conformance with the
Specifications.

B. CONTRACTOR shall submit documentation demonstrating that the pipe-welding
technicians are certified by the pipe manufacturer to weld HDPE pipe.

PART 2 - PRODUCTS
2.1 PHYSICAL PROPERTIES

A. Materials used to manufacture the HDPE pipe and fittings shall meet the following
physical property requirements:

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