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CITY OF NASHUA REPRESENTATIVE The City of Nashua may designate a City of Nashua
representative for this contract. If designated, all notices, project materials, requests by Professional
Consultant, and any other communication about the contract shall be addressed or be delivered to
the City of Nashua Representative.

CHANGES TO SCOPE OF WORK The City of Nashua may, at any time, by written order, make
changes to the general scope, character, or cost of this contract and in the services or work to be
performed, either increasing or decreasing the scope, character, or cost of Professional Consultant's
performance under the contract. Professional Consultant shall provide to the City of Nashua within
10 calendar days, a written proposal for accomplishing the change. The proposal for a change shall
provide enough detail, including personnel hours for each sub-task and cost breakdowns of tasks,
for the City of Nashua to be able to adequately analyze the proposal. The City of Nashua will then
determine in writing if Professional Consultant should proceed with any or all of the proposed
change. If the change causes an increase or a decrease in Professional Consultant's cost or time
required for performance of the contract as a whole, an equitable adjustment shall be made and the
contract accordingly modified in writing. Any claim of Professional Consultant for adjustment
under this clause shall be asserted in writing within 30 days of the date the City of Nashua notified
Professional Consultant of the

change.

When Professional Consultant seeks changes, Professional Consultant shall, before any work
commences, estimate their effect on the cost of the contract and on its schedule and notify the City
of Nashua in writing of the estimate. The proposal for a change shall provide enough detail,
including personnel hours for each sub-task and cost breakdowns of tasks, for the City of Nashua
to be able to adequately analyze the proposal. The City of Nashua will then determine in writing if
Professional Consultant should proceed with any or all of the proposed change.

Except as provided in this paragraph, Professional Consultant shall implement no change unless the
City of Nashua in writing approves the change. Unless otherwise agreed to in writing, the provisions
of this contract shall apply to all changes. The City of Nashua may provide verbal approval of a
change when the City of Nashua, in its sole discretion, determines that time is critical or public
health and safety are of concern. Any verbal approval shall be confirmed in writing as soon as
practicable. Any change undertaken without prior City of Nashua approval shall not be
compensated and is, at the City of Nashua's election, sufficient reason for contract termination.

CITY OF NASHUA COOPERATION The City of Nashua agrees that its personnel will cooperate with
Professional Consultant in the performance of its work under this contract and that such personnel
will be available to Professional Consultant for consultation at reasonable times and after being given
sufficient advance notice that will prevent conflict with their other responsibilities. The City of
Nashua also agrees to provide Professional Consultant with access to City of Nashua records in a
reasonable time and manner and to schedule items that require action by the Board of Aldermen
and Finance Committee in a timely manner. The City of Nashua and Professional Consultant also
agree to attend all meetings called by the City of Nashua or Professional Consultant to discuss the
work under the Contract, and that Professional Consultant may elect to conduct and record such
meetings and shall later distribute prepared minutes of the meeting to the City of Nashua.

DISCOVERY OF CONFLICTS, ERRORS, OMISSIONS, AMBIGUITIES, OR DISCREPANCIES
Professional Consultant warrants that it has examined all contract documents, has brought all
conflicts, errors, discrepancies, and ambiguities to the attention of the City of Nashua in writing,
and has concluded that the City of Nashua's resolution of each matter is satisfactory to Professional
Consultant. All future questions Professional Consultant may have concerning interpretation or
clarification of this contract shall be submitted in writing to the City of Nashua within 10 calendar
days of their arising. The writing shall state clearly and in full detail the basis

GC 3 of 11

EXHIBIT B

"The Gate City

linancial Services
Prrvhasing Department

April 28, 2017

1FB1094-050817
Nashua WWTF — Water Valve and Yard Hydrant Installation
ADDENDUM #1

information included in this document becomes a part of the original iF8

if you are submitting a paper bid, please sign below to indicate receipt of this additional information and include this
page with your bid submittal. If you are submitting a bid via Bid Express please be sure to acknowledge the addendum
on the website before submitting your bid

ADDENDUM 1 is being issued to respond to submitted questions, include changes to the scope of work, changes to
the bid sheet and additional drawings.

All other aspects of the original document remain the same.

Respectfully,

Ayton a hop
CHV WN
oe

Danielle Greenberg
City of Nashua - Purchasing Agent {|
greenbergd@nashuanh.gov

Addendum #1 received and incorporated into bid submittal for 1FB1094-050817
Please sign and include this addendum in your bid package.

WATS ane
WwW VD Ow MMA IRE
{Authorized Signature)

05/07/2017
{Date

William P Davis Excavation LLC

{Name of Firm)

1FB1094 -050817 ADDENDUM 1
229 Main Street » Nashua, Naw Hampshire 03061 » Phone (603) 589-3330 » Fax (603) 589-2293 Page 1 of 1

ADDENDUM NO. |
Nashua WWTIF — Water Valve and Yard Hydrant insisilation

£7B1094-050817

April 2017

All bidders must acknowledge receipt of this Addendum No. 1 by signing it and including with
the bid or stating “acknowledge Addendum 1” directly on the bid sheet. Bids submitted without
acknowledgement of receipt of this addendum may be considered non-responsive.

The following information and changes are now part of the Contract Documents.

DRAWING

1 Remove “New 3” Valve (Contractor to verify pipe size) for the valve into the primary
tanks. Add at two locations on north wall of primary clarifiers “Replace 2” Copper Plant
Water Valve in Pipe Gallery” (see revised drawing).

Note: the pipe gallery is a below grade concrete vault that runs the length of the north

face of the primary clarifiers with stairway entrances at both ends. It houses pumps,

pipes, controls and valves. There is plenty of work space and lighting available to work.

The existing copper (or brass) valves are 2-inch gate type that tee into the existing 2”

copper pipe with solder weld. The new valves will be 2-inch ball type (brass) valves to

be soldered to existing copper pipe.

Add “New 6” Valve “ to the 6” DI line just north of the Aeration Tanks (see revised

drawing).

3. Add electric and instrumentation control boxes that are visible and adjacent to new valve
and hydrant installation at 3 locations — hydrants 4, 5 and 14 (2 on the west face of
primary clarifiers and one at sodium hypochlorite storage tanks.

4, Add note “Cut 7’x7’ section of concrete slab & restore after installation of new valve &
hydrant” at hydrant no. 14 location of sodium hypochlorite storage tanks.

5. Add note “Remove riprap & restore after installation of new valve and hydrant” at hydrant
no. 17.

6. Eliminate note “Pipe freeze to replace valve & hydrant” at hydrant no. 19”. One of the
shut off valves will likely be used instead of the need to pipe freeze.

7. Add note “Existing plant water enters building 8’ below grade” at the location of the
inserta valve to be installed near the entrance to the Sludge Processing and Dewatering

tu

GUESTIONS RECEIVED

I.

Will the Plant Electrician repair an electric or communications line accidently severed
during construction that is not marked in the field?

Answer: Yes, however the contractor must excavate in a slow and cautious manner. The

contractor should remove a small amount of material in each in each scoop, 1-foot or less
of depth. Additional hand digging or probing should be done in advance of excavation to
verify there are no unknown utilities present.

Shouldn't a 6-inch inserta valve be installed on the water line that feeds around the
primary clarifiers before installing the two 3-inch valves?

Answer: Yes, if there are sufficient funds in the project to cover this additional cost. If
not the City reserves the right to eliminate the additional 6-inch valve and use pipe
freezing methods to isolate the two 3-inch valves (if more cost effective). An additional
6-inch inserta valve was added to the bid sheet and is shown on the drawings.

2 THE CITY OF NASHUA sine (oe cin

MMO Cs

f ty, é ae s tg td pes cae &
Pep farcare [dep rbuecaye

April 19, 2017

INVETATION FO BID
Nashua WWTP - Water Valve and Vard Uydrani installations

LP B1094-GS50817

The Coty of Nashua, Division ot Public Works, invites eaperionced and qualified Firnis to submit bids for installation: of
water valve and vard hydrant units a) the Nashua Wastewater Preatment farciity (NW EPS, lecaied at 2 Sawnnll Ror,
Nashua. NEPOS060, Please rcter te the Doeument “SFB YE-O508 FO Scane af Work” bor turther dutails

INFORMATION FOR BIDDERS:

The City is now accepting buls electronically via Bid Lxpress. Please review the attachment, Bid Express Fendor Guide
for more information. HW you choose to submit a paper bid Wt must be submitted in triplicate (one (1) original amd two (2)
copies) mi sealed envelopes clearly marked “Nashua WW'TEF - Water Valve and Hydrant Lustallation”. Rezardiess of
the method of submission the bid must be received prior to 3:00 pm on Monday, May 8, 2017 Central Purchasing, 220
Main Street, Nashua, Room 128, NEL O3001, Bids will be publicly opened and read aloud at (hat time. Results showing all
bidders’ kientfies and their respective bid anmwunts will be available on our website, ww idsboeih vos. under Services:
Bid Opportunities: Bid Results and on Bid bxpress, (Refer to Document IPB 1094-0508 17), within twenty-four (24) hours
alter the opening. Postmarks or other timestamps will net be aecopled tn lieu of actual delivery. fhe firm can use
whatever delivery mechanism H cheases as long as it remains clear that the firm ts responsible for subriissicns prior io the

date and time.

Bids must be submitted in the format provided and address the uns specified in the bid packaye. Che City of Nashus
may reject any or all of the bids on any basis and withoul disclosure of a reason, The ialure fo make such a disclosure
shall not result in accrual of any right, claim or cause of acnion by any unsuccesstul bidder against the City of Nashua.
The City of Nashua reserves the right fo waive any inregularities when the public interest will be served thereby. The City
of Nashua also reserves (he right to negotiate any change or amendment mi uny bid without soliciting further bids if ihe
action is nevessary for the best interest of the City of Nashua.

Completion ime forthe project will be valeulated as calendar days from the date specificd in the “Notice ty Proceed”, os

follows:

145 calendar days for substantial completion
175 calendar days for final completion

1FB1094 050817 WWITF - Plant Water Valves and Hydrants Installation
224 Main Street » Nashua, New Hampshire 03061 « Phone (GO3} 589-3330 @ Fax (603) 589-3733

ee

A MANDATORY pre-bid conterence to discuss the project is scheduled to begin promptly on Monday Apri! 24, 2017
at 9:00) AM > at the Wastewater Treatment Facility, 2 Sawmill Read, Nashua NH 63060 ia the
Administration/Control Building Conference Roon:, immediately followed by a walkthrough of the proposed project
You or your represuntative(s) ure required to attend this mecting if you Intend to submit a bid. The meeting is an
opportunity for the City fo provide an overview of the project and Us objectives, and for participants to request additional
information directly irom City stall managing or purticipating in the project.

Beginning Tues, March 15, 2017, bid documents will be available clectronieally from the Cicy of Nashua website:
wae wabohtianlise. under Services, Bid Opportunities; Current Bids and on the Bid express website: (Reler to Document
IF B1094-050817). Please aete paper copies will not be available.

No bid documents are available at the Central Purchasing Office.

Delivery of the Bids shall be at ine Vendor's expense. The time of receipt shall be considered when u id hus been
officially documented by the Department, in accordance with is established policies. as having been received at the
location designated above or the time ol submission on Bid Uxpress. The City of Nashua accepts no responsibility for
mislabeled mail. Any and all damage that may occur due to shippmy shall be the Vendor's responsibility.

Postmarks or other timestamps will get be accepted in lieu of actual deliverv. Phe firm can use whatever delivery
mechanisin it Chooses as long as it remains clear that the firm is responsible for submissions prior to the daic and time.

The City of Nashua assumes no lability for the payment of costs and expenses incurred by any bidder in responding te
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 bul rather serves as an instrument through which bids are solicited

Che project tineline is as follows:

Date Vime/iocation i
lowe a Pe oe - a a
Bid Docunnunts Tuesday. April [S. 2017 On City of Nashua Website Only
7 ) a | 9:00 am
NWTE
Mandatory Pre-bid Mceung Monday, April 24. 2017 Adinistration/Control Building Conf Ra

2 Sawmill Road,
Nashua NH O30G0

Deadline for Questions to be

; a Wednesday, April 26, 2017 3:00 pm
submitted in writing :
Answers‘clarifications posicd Iriday, Apml 28. 2017 3:00 pm
Bid Due Monday. May O&, 2017 3:00 pri Purchasing Departaieni

Vendors are encouraged to submit questions via email or via Bid Pxpress; however. ihe Cuy of Nashua assumes no
liability for assuring accurate/complete email transmission/receipt and is not responsible to acknowledge receipt.
Inquiries must be submitted in writing, citing the IFB title, TFB number, Page, Section. and received no later than
Wednesday, April 26, 2017 at 3:00 pm to

Wiliam Keatinu

Pail Keaing Wee NashuaN“i gov
OR
Via Bid Express

IFBL094-050817 WWTF - Plant Water Valves and Hydrants Instailation
Page | 2

Phe City of Nashua will consider all mely-secerved questions and requests tor change and. if reasonable and appropriate.
will issue an addendum to clarify or modity this 1B. Auswers to vendor submitted questions and other addenda will be
posted under decument IFB1094-050817 the City ef Nashua website: www pashuahocoy, under. Services: Bid
Opportunities; Current Bids and to Bid Express (Refer to Document IF BO779-041217) no iater than Friday, April 28,
2017 af 3:00 pi.

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

The successful bidder mmaist maintain ihe following floes of coverage and policy limits tor the duration of the contract. Any
subcontractors used by the successful bidder are subject to the same coverage and limits and is a subcontractor of ihe
successtul bidder and not the Civ of Nashua. [ors the responsibility af the successful bidder no update Certifieuies ol
Tusurance during the term ai the contract. Liability limits are as follows:

e General Liability: $1 000,000 per Oecurrence
$2.000.000 Ageregate

» Motor Velucle Lagbiinty: $1,000,000 Combined Single Linii
“Coverage must include all owned, non-owned and dired vehicles,

» Workers” Compensation Coverage according to Statute of the State of New Hampshire:
4 100,0060 § S300.060 25 100,000

The Citv of Nashua must be named as an additional insured on ali liability certificates.

All bidders and subconiractors at every ter under the bidder will lully comply with NH RSA Chapter 281-A,
“Workers” Compensation’.

lias the responsibility of the Contractor to submit to the City of Nashua certificates of insurance tor the Contractor and all arher
subcamractors prior to the start of ihe project. [tas the responsibility of the Coriractor to pravide the City of Nashua wih
updated certificates of insurance for ie Contractor and all subcontractors (0 days prior io the expiratiant of coveraye. The City
of Nashua may, al any time, order the Contractor to stop work, suspend the contract or tarmminate the contract for none
compliance. All subcontractors are subyect to the suine insurance requirements as dhe Contractor

No bud wall be considered unless accompanied by a bid security m ihe form ofa Bal Bond, in go amount aot loss than ve
percent (5%) of the Biel.

The successful Contractor will be required to posta 100% Perlormanee Bond and a 10% Payment Bond ia an amount equal io
the Contract Award.

You may choose to subnid an electronic bond un Bid Lxpress via Surety 2000,
Cast of bord premiums to be meluded in the Unit Prices of the Bid Schedule.

The City of Nashua ts exempt of all taxes. All bids must be POU3 Nashua. NH. AT bidders must comply with ull applicable
[qual employment Opportunity laws aad regulations.

Pursuant to NRO 8-78 (1), the Parchasing Manager shall not solicn a bed froin a contractor who ts in default on the payment of
taxes. licenses or other montes due the Ciy of Nashua. Therefore, this bid request is void us te anyone who is in default on said
payments,

Respecilully.

+

IFB1094-050817 WWTF - Plant Water Valves and Hydrants Installation
Page | 3

Scope of Work — Valve and Yard Hydrant Installation

EXHIBIT C

There are 21 yard hydrants and gate valves at the Nashua Wastewater Treatment Facility located
at 2 Sawmill Road that are in need of replacement. The yard hydrants are on the plant water
systems or chlorinated effluent from the treatment plant. The existing plant water system was
originally installed in 1972 and later expanded in 1988 and again in 2000. The original plant
water system is cast iron pipe and in the later year’s ductile iron pipe was used. The pipe
material is shown on the plans. As a result of the age of the installation of the system, many of
the yard hydrant and associated valves do not operate properly.

The plant water system consists of effluent water that is filtered and chlorinated. It is pressurized
to 125 psi by four pumps in the lower level of the pump building. It typically pumps between
200-300gpm depending on the water use.

This project will occur in the 2 phases. First is the installation of the gates valves on the plant
water system mains at locations as shown in the Proposed drawing. The following size valves
will be installed using live without having to turn off the plant water: 1 — 12” valve, 1 — 10”
valve and 2 — 6” valves. In addition, 3 — 3” valves will be installed using pipe freezing
techniques to isolate the pipe at the locations shown on the Proposed Drawing. Each valve
installation shall include a valve box size for the installation (refer to specifications). Two valve
keys shall be supplied to match a standard 2-inch square top nut and long enough to extend a
minimum or 3-feet above ground. The contractor shall have a test pit dug at to verify the outside
diameter at four locations to verify the pipe size prior to ordering the valves. The test pits should
be dug at the same location where the valve will be installed. The depth is assumed to be 5— 6
feet. It shall be backfilled when done unless the contractor is able to get the valve within a few
days of the dig. Alternatively, the test pit may be plated over if it completely covers the
excavation. New gate valves should be installed on lawn areas (when possible) to minimize
disturbance to paved roadways. The number of gate valves to be installed may be limited by
funding or constraints that may be encountered prior to installation.

The second phase of the project will involve the installation of the 21 yard hydrants, valve shut
offs and connection piping/fittings. One hydrant was dug up recently (location number 6 on the
Design Plan) and the main was determined to be 4” (OD — cast iron) with a 4x4”x2.5” (all OD
measurements) tee. Based on this information, the contractor shall leave the main tee in place,
cut off the pipe at an appropriate distance from the tee and connect with a coupling to new pipe,
gate valve, yard hydrant and associated fittings.

The contractor will supply all coupling, pipe sections, gate valve shut offs, and yard hydrants.
and hydrant, gravel (min. 1 c.f.) for weep hole at base of hydrant and thrust block along with
general installation. Min bury is 5.5 feet above piping. The yard hydrants shall be #2 Post, 5’-6”
bury, 3” MJ inlet, duel outlet nozzles1-1/2”, NTS, ductile iron riser with cast iron top, galvanized
steel operating rod, self-draining, nonfreezing. The gate valves shall be 3” RW gate valve MJ,
open left, C509 Mueller or equal. Fitting are to be 3” EBBA DI Megalug and 3” MJ Gasket &
Bolt Pack. Valve box shall be a 2-piece slide type top flange valve box, complete with

“WATER” marked lid. Contractor is responsible to supply all miscellaneous piping, fittings and
other materials not mentioned above.

One yard hydrant and valve is missing (number 16 on the design plan). The contract will need to
dig at the approximate location marked in the field to locate the old hydrant stem and valve box.
This work is incidental to contract.

The number of gate valves and yard hydrants to be installed may be limited by the funding
available or constraints that may be encountered prior to installation. The City reserves the right
to eliminate yard hydrants at less critical locations depending on the outcome of the bid.

There are asphalt aprons around the primary and grit tanks that may be compromised during the
installation. It is assumed at these locations that a 1.5” thick patch will be sufficient. Asphalt
repairs at locations on. a main drive is impacted in around outside digester it should meet City
specs for a minor roadway or a minimum of 1’ gravel, 2” base and 1.5” top coat.

Sidewalk replacement shall be according to City details for sidewalk replacement. During
sidewalk repairs it will be necessary to remove and reset of curbing, which is incidental to the
sidewalk replacement.

All disturbed grass areas to be loam & seeded. All old yards and other debris shall be removed
by the contractor. Miscellaneous debris may be delivered at no additional cost. Delivery of
debris must be scheduled in advance with the Solid Waste Department and arrive at the facility
no later than 2pm.

EXHIBIT D
CITY OF NASHUA

Technical Specifications for Water Valve and Yard Hydrant Installation

General: These specifications are not necessarily inclusive of all the work being done. The
contractor shall submit shop drawings of all yard hydrants and valves, water main valves, piping
and all fittings to be used prior to starting any work.

1. Ductile Iron Pipe for Service Connection to Existing Pipe

A. New ductile iron water pipe is to be used from where the existing service line pipe is cut
to the location of the new yard hydrant being installed. All ductile iron pipe shall
conform to AWWA Standard C151.

B. If ductile iron pipe is not available for the service line pipe size, the contractor shall
submit a shop drawing of the pipe to be used. No PVC, plastic or copper pipe is
permitted.

C. The pipe shall have an exterior epoxy coating on it to prevent corrosion.

D. Contractor shall determine appropriate connection fitting from the existing pipe to new
ductile or iron pipe. All fittings shall be durable ductile iron or iron, epoxy coated and be
a megalug or other mechanical joint to firmly connect the two pipes.

2. Water Main Gate Valves

A. Water main gate valves for the 6-inch, 10-inch and 12-inch size shall be live tap valves
equal to Hydra-Stop Insta-Valve 250 Patriot Series.

B. Traditional line tapping methods shall be used for the Installation of all Insertion Valves
to allow removal of a single coupon for system evaluation. Reaming the pipe, complete
removal of a section of pipe (top & bottom), or milling a slot in the pipe shall be
prohibited.

C. All insertion valves must be capable of working on Cast/Grey Iron or Ductile Iron Class
A, B, C and D, IPS PVC, C900 and C909 PVC, Steel and AC pipe diameters without
changing either top or bottom portion of split valve body or using a transition gasket.

D. All insertion valves must provide a solid support of the host pipe through the entire
laying length of the valve body. No gaps or space between the valve body and host pipe
shall be accepted.

E. All insertion valves shall be rated for 250 psig maximum working pressure. The pressure
rating must be permanently marked into the body.

F. All insertion valves must be hydrostatically pressure tested to 1.25 times of the system
operating pressure (minimum) or 1.5 times of the Insertion Valves 250 psig maximum
pressure rating. The test shall be sustained for a minimum of 15 minutes. Once the
pressure test is affectively achieved the insertion valve body must not be moved in
accordance with AWWA Standards. If the insertion valve body is moved the pressure test