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3.3. PIPE TESTING

A. General

1.

2.

7

9.

The Contractor shall perform hydrostatic pressure tests after placement
in trench, in accordance with these specifications.

The total test time, including initial pressurization, initial expansion, and
time at test pressure shall not exceed eight hours. If the test is not
completed in eight hours, the pressure in the test section shall be
released and the section allowed to “relax” for at least eight hours before
initiating another test.

Pipe lines shall be pressure tested in presence of the CQA Consultant.
CONTRACTOR to provide ENGINEER with a minimum of 7 days’ notice
before performing the test.

Provide necessary connections between section of pipe being tested and
nearest available source of water or air supply, together with test
pressure equipment, meters, pressure gauge, other equipment, materials
and facilities necessary to make specified tests.

Owner will provide a source of water for testing.

Provide bulkheads, flanges, valves, bracing, blocking, or other temporary
sectionalizing devices as required to perform the tests safely.

Pipe to be tested shall be exposed in the trench, except that bends,
reduced pressure rated fittings and components should be buried or
restrained. Flange connections shall be visible to check for leaks.
Contractor shall notify on-site personnel of the testing schedule, and only
allow personnel required to perform the test in the test area for the
duration of the test.

Contractor shall provide a system without leaks.

B. Test all non-perforated HDPE leachate force main pipe and fittings. Test all
PVC pipe in the Sump Riser Building, installed in accordance with specification
section 15212 and 15310, using this procedure as well.

C. Preparation

1.

Oe

Remove or isolate valves, flow meters, and instruments that may not
withstand the required test pressure from within the test sections.
Reconnect pipes with temporary fittings. Vent isolated equipment.

Flush pipe with clean water until pipe section to be tested is clean and
free of dirt, sand, pipe shavings, or other foreign material.

Plug pipe outlets with test plugs, blind flanges or other devices suitable
for the test pressure. Brace securely to prevent blowouts. Verify test
pressure does not exceed any component of the pipe system.

Restrain or remove expansion joints.

Pressurizing equipment shall include a pressure regulator, set to avoid
over-pressurizing and damaging otherwise acceptable pipe.

File No. 3066.09

High-Density Polyethylene Pipe 15210 - 10 of 15 Revised February 2019

D. Hydrostatic Pressure Testing

1.

2.
3.

8.

9.

Contractor shall use a hydrostatic test pump specifically designed for
performing hydrostatic pressure tests on pipe.

Clean potable water shall be used as the testing medium to fill the pipes.
Pipe shall be tested at 1.5 times the rated working pressure of the pipe or
the lowest rated pressure of any component of the system being tested.
In no case exceed maximum allowable pressure for any pipeline
component, including valves, fittings, and instruments.

Apply test pressure slowly, and once the test pressure has been reached,
allow the pressure to stabilize, without adding additional pressure. This
may take 2 to 3 hours.

Once pressure has stabilized, add additional water to achieve the test
pressure and begin the test.

After 1 hour, additional water shall be added to return to the test
pressure. If the volume of water required to achieve the test pressure
after 1 hour is less than shown in the table, then the pipe has passed the
pressure test.

The total test time, including the initial pressurization, initial expansion
and time at test pressure, shall not exceed eight hours. If the test is not
completed within that time, the test pressure shall be removed for at least
eight hours, prior to performing the test again.

If pressure test is not accepted, correct leaks or defects in the pipe and
retest.

Remove temporary sectionalizing devices after tests are complete.

E. Pnematic Testing

WARNING: Compressed air or any pressurized gas used as a test medium may
present severe hazards to personnel in the vicinity of pipelines being tested.
Personnel protection precautions must be observed when a gas under pressure
is used as the test medium.

WARNING: Explosive Failure. Pipe system rupture during pneumatic pressure
tests may result in explosive, uncontrolled movement of system pipe, or
components, or parts of components. Keep personnel a safe distance away from
the test section during testing.

1.
2.

The test period at the test pressure shall last no more than 10 minutes.
Provide all necessary connections, bulkheads, flanges, bracing, and
blocking, as well as all required test equipment.

Test pressure gauge shall have a maximum range of no more than 20 psig,
with minor gradations no greater than 0.1 psig.

File No. 3066.09

High-Density Polyethylene Pipe 15210 - 11 of 15 Revised February 2019

4. Pipe to be tested shall be exposed in the trench, except bends, reduced

pressure rated fittings and components, which shall be buried or

restrained. Flange connections shall be visible to check for leaks.

Test pressure shall be 10 psig.

6. Test shall be accepted if the pressure drop over 10 minutes is less than 5
percent of the pressure at the beginning of the test period.

ut

F. Test Report
1. Pressure testing shall be documented using one of the test logs provided
as Attachment 1 and 2 to this Specification depending on the test method
utilized by the CONTRACTOR.
2. CQA Consultant shall record the following information for each test.
Date of test.
Description and identification of piping system tested.
Type of test performed.
Test fluid.
Test pressure.
Results of test.
Type and location of leaks detected.
Corrective action taken to repair leaks.
Results of retesting.
Name of person performing test.

oro moan oe

[END OF SECTION 15210]

P:\3000s\3066.09\Source Files\Type II App\Specifications\ Division 15 Specifications\15210 HDPE.docx

File No. 3066.09 High-Density Polyethylene Pipe 15210 - 12 of 15 Revised February 2019

ATTACHMENT 1 TO SECTION 15210
HYDROSTATIC PIPE PRESSURE TEST LOG

Project No.:
| Project Name:
SANBORN | | HEAD Project Location:
Buflding Trust. Engineering Success.
Weather

Contractor: Test No.
Sanborn Head Personnel: Person/Company Performing the Test:
Date of Test: Time of Test: Start: Finish:
Pipe Length: ft. Pipe Diameter: in. Pipe Material: Pipe SDR/Sch.:
Rated Working Pressure: Test Pressure:
Location/designation of pipe tested:

t Pe Pc Amount of

Time Pressure Gauge Pressure Make-Up Water Added
(hours) Reading Dro
(psig) (%) (gal.)

0

1

2

3

4

5

6
Pass Fail Retest? Yes No

Description/location of defects for failed test:

Test Procedure:

Pressurize to 150 percent of rated pressure;

Add make-up water each hour for three hours to maintain pressure;

Test phase begins after the initial three-hour phase;

After one, two or three hours add a measured amount of makeup water to return to the test pressure; and
The amount of makeup water added to return to the test pressure must not exceed the amount in the
makeup water test values table on the back of this sheet.

we wWN PR

Comments:

Signature:

File No. 3066.09 HDPE Pipe, Fittings, and Appurtenances 15210 - 13 of 15 Revised February 2019

MAXIMUM ALLOWABLE MAKE-UP WATER VOLUME

Nominal Pipe Size Make-Up Water Allowance
(inches) (U.S. Gallons per 100 ft. of Pipe)
1 Hour Test 2 Hour Test 3 Hour Test

1-1/4 0.06 0.10 0.16
1-1/2 0.07 0.10 0.17
2 0.07 0.11 0.19

3 0.10 0.15 0.25

4 0.13 0.25 0.40

5 0.19 0.38 0.58
5-3/8 0.21 0.41 0.62
6 0.3 0.6 0.9
7-1/8 0.4 0.7 1.0
8 0.5 1.0 1.5
10 0.8 1.3 2.1
12 11 2.3 3.4
13-3/8 1.2 2.5 3.7
14 1.4 2.8 4.2
16 1.7 3.3 5.0
18 2.0 4.3 6.5
20 2.8 5.5 8.0
22 3.5 7.0 10.5
24 4.5 8.9 13.3
26 5.0 10.0 15.0
28 5.5 11.1 16.8
30 6.3 12.7 19.2
32 7.0 14.3 21.5
34 8.0 16.2 24.3
36 9.0 18.0 27.0
42 12.0 23.1 35.3
48 15.0 27.0 43.0
54 18.5 31.4 51.7

File No. 3066.09 HDPE Pipe, Fittings, and Appurtenances 15210 - 14 of 15 Revised February 2019

The H.L. Turner Group Inc.

27 Locke Road Concord, NH 03301: 603.226.1122 hiturner.com

Nashua Riverfront Development Project
Final Engineering Design

5/11/2022
TASK DESCRIPTION WORMHCDRS Tore
PM Structural PE Sr PD Tc HOURS
Segment 7 - Riverfront Path Along BAE Property
7.1- Erosion & Scour Determination 8 20 2 30
oe Oe ee ee ee ee eee ee ee ee ee ee ee es ee ee ee ee ee ee ee ee erect 305° Tl
a ee a ee ee ee es ee ee ee ee eee ee ee ee ee ee ee ee ee ee ee ee ee ee ee ee es ee ie ee eet et ee ee ee ees ee ee ees ee ees ee ee oe
TOTAL HOURS 8 0 20 0 2 30

ESTIMATED ENGINEERING COSTS

Work Estimated
Hours Hourly Rate Costs
Project Manager (PM) 3 5 150,00 $ 1,200.00
Structural Engineer (Structural) 0 5 185.00 $ -
Project Engineer (PE) 20 S$ 130.00 $ 2,600.00
Sr. Project Designer I (Sr PD) 0) $ 105.00 $ -
Technical Coordinator (TC) 2 $ 100.00 $ 200.00
| 30 | Total Fully Burdened Labor $ 4,000.00
Subconsultant S -
Expenses $ 190.00
Estimated Direct Costs $ 109,00
TOTAL ESTIMATED COST= $ 4,100.00

ATTACHMENT 2 TO SECTION 15210
PIPE PRESSURE AIR TEST LOG

SANBORN ll HEAD

Project No.:

Project Name:

Project Location:

Weather:
Contractor: Test No.:
SHA Personnel: Person/Company Performing the Test:
Date of Test: Time of Test: Finish:
Pipe Length: ~ ft. ripe Diameter: Pipe Material: Pipe SDR/Sch::
Rated Working Pressure: Test Pressure: psi
Location/designation of pipe tested:
t T Pr P.
Time Pipe Temperature Pressure Gauge Reading Pressure Drop
(min.) (°C) (psig) (%)
0
5
10
15
30
60
Pass Fail Retest? Yes No

Description of leaks and repairs of retested pipe segments:

FoF. 100
P.

Oo

P,= Percent Pressure Drop

P, = Initial Pressure Gauge Reading

P; = Pressure Gauge Reading at Time t

Comments:

Signature:

File No. 3066.09

HDPE Pipe, Fittings, and Appurtenances 15210 - 15 of 15

Revised February 2019

figee\ THE CITY OF NASHUA “The Gate City’

Purchasing Department

January 17, 2019
INVITATION FOR BIDS

Phase III Landfill Expansion

IFB0593-022019

The City of Nashua, Division of Public Works, is seeking sealed bids for the work as set forth in
the attached plans and specifications for construction of the Phase III lined expansion landfill at
the Four Hills Landfill, 840 West Hollis Street, in Nashua, New Hampshire. The scheduled
work includes but is not limited to, site preparation, landfill liner base grade preparation,
installing a double High Density Polyethylene (HDPE) plastic liner system, installing leachate
collection and removal piping, pumps and appurtenances, and constructing storm water control
infrastructure.

Please note that as of the date of this Invitation for Bid, groundwater data needed to provide a
groundwater separation demonstration associated with the proposed landfill base grades is not
complete. NHDES has required the City to continue collecting data through June 2019 in order
to determine that the groundwater separation is adequate for liner installation. A final approval
of the landfill base grades from NHDES is expected 30 days after submission of all required
groundwater data. NHDES has specified that no work associated with liner system installation,
including the 6-inch Screened Till layer, can begin until they have granted approval. All other
work not associated with the liner system installation can commence after the contract has been
executed.”

“Notice to Proceed”, is anticipated to be issued in the April of 2019. Completion time for the
project will be calculated, in calendar days, from the date of the issuance of the “Notice to
Proceed”, as follows:

150 calendar days for substantial completion
180 calendar days _ for contract completion

Liquidated damages will be in the amount of $500.00 for each calendar day of delay from the
date established for substantial completion, and $500.00 for each calendar day of delay from the
date established for contract completion.

IFB0593-022019 Phase III Landfill Expansion

229 Main Street » Nashua, New Hampshire 03060 e Phone (603) 589-3307 Fax (603) 594-3434

The City is now accepting submittals electronically via Bid Express. Please review the
attachments, Bid Express Vendor Guide and Vendor Set-up Guide for more information. If a
Bidder chooses to submit a paper copy, the bid must be submitted on the bid form, in its entirety,
in triplicate (one (1) original and two (2) copies) in a sealed envelope plainly marked
“IFB0593-022019 Phase III Landfill Expansion” and must be received at Central Purchasing,
229 Main Street, Room128, Nashua, New Hampshire 03061 prior to 3:00PM, Wednesday,
February 20, 2019. Postmarks or other time stamps will not be accepted in lieu of actual
delivery. The contractor can use whatever delivery mechanism it chooses as long as it remains
clear that the contractor is responsible for submissions prior to the date and time. Further details
are available on the City’s web site, www.nashuanh.gov, under Services; Bid Opportunities;
Current Bids; IFB0593-022019. Bids will be opened in public on the due date and time. Results
of the bid opening will be posted on the City’s web-site, under Services; Bid Opportunities;
Current Bids; within twenty-four (24) hours of the opening.

Contract approval will be contingent on approval by the Board of Public Works, and the
Aldermanic Finance Committee.

Beginning Thursday, January 17, 2018, bid documents will be available electronically from
the City of Nashua website: www.nashuanh.gov, under Services, Bid Opportunities; Current
Bids; (Refer to Document IFB0593-022019.

Please note paper copies will not be available.
No bid documents are available at the Central Purchasing Office.

Bids must be submitted in the format provided and address the items specified in the bid
package.

Delivery of the Bids shall be at the Vendor’s expense. The time of receipt shall be considered
when a Bid has been officially documented by the Department, in accordance with its established
policies, as having been received at the location designated above. The City of Nashua accepts
no responsibility for mislabeled mail. Any and all damage that may occur due to shipping shall
be the Vendor’s responsibility.

The City of Nashua assumes no liability for the payment of costs and expenses incurred by any
bidder in responding to this request for bids. All bids become the sole property of the City of
Nashua. This request for bids is not a contract and alone shall not be interpreted as such but
rather serves as an instrument through which bids are solicited.

The City of Nashua may reject any or all of the bids on any basis and without disclosure of a
reason. The failure to make such a disclosure shall not result in accrual of any right, claim or
cause of action by any unsuccessful bidder against the City of Nashua. The City reserves the
right to waive any irregularities when the public interest will be served thereby. The City also
reserves the right to negotiate any change or amendment in any bid without soliciting further
bids if the action is necessary for the best interest of the City. A bid that is abnormally high or
low for any bid item, or as a whole, may be rejected as unbalanced.

All bids are binding for ninety (90) days following the deadline for bids, or until the effective
date of any resulting contract, whichever is later.

IFB0593-022019 Phase III Landfill Expansion

To be eligible for award, a bidder must be deemed “responsible”. A responsible bidder 1) has
the ability, capacity and skill to provide the goods or services required; 2) can provide the goods
or services within the time frame specified; 3) has a satisfactory record of integrity, reputation,
judgment and experience; 4) has sufficient financial resources to provide the goods or services;
5) has an ability to provide future maintenance and support as required; and 6) has developed a
positive track record with the City of Nashua to the extent the bidder has previously provided
goods or services.

A sample contract is included with the Bid Specifications.

The project timeline is as follows:

Subject Date Time
10:00 am

Mandatory Pre-Bid Four Hills Landfill,
Conference ee 840 West Hollis Street

Nashua, NH 03062
Deadline for Vendor .
Questions Monday, January 28, 2019 12:00 Noon
eens Wednesday, January 30, 2019 3:00 pm
Posted
Bid Submittal Date Wednesday, February 20, 2019 3:00 pm
Bid Award Anticipated to be April 2019

A MANATORY Pre-Bid Conference will be held at 10:00 am, Wednesday, January 23,
2019 at the Four Hills Landfill, located at 840 West Hollis Street, in Nashua, New
Hampshire. You or your representative(s) are required to attend this meeting if you intend
to submit a bid. The meeting is an opportunity for the City of Nashua to overview the project
and objectives, and participants to request additional information directly from City of Nashua
staff managing or participating in the project.

Vendors are encouraged to submit questions via e-mail; however, the City assumes no liability
for assuring accurate and complete email transmission/receipt and is not responsible to
acknowledge receipt. Inquiries must be submitted in writing, citing the IFB title, FB number,
Page, Section, and received no later than Monday, January 28, 2019 at 12:00 Noon to:

Mr. Kerry Converse

City of Nashua

Solid Waste Department

840 West Hollis Street

Nashua, NH 03062

Email: conversek@nashuanh.gov

IFB0593-022019 Phase III Landfill Expansion