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To:

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Re:

C. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: November 20, 2017

Noelle Osborne, Plant Operations Supervisor
Wastewater Department

Waste Water Facility HVAC Upgrades

To approve the change order to the HVAC Upgrades contract with Monadnock Building
Company in the amount of $54,099.10. Funding will be through: Department: 169 -
Wastewater; Fund: Wastewater; Activity: AC & Air Handling.

Change Order 3 Backup

The contract with Monadnock Builders to rebuild the HVAC system in the Control and
Grit Buildings at the Wastewater Treatment Facility is currently for $896,956.00. This
includes the first two change orders, which were phased in work of the original scope.

This is the first change order beyond the original contract bid amount, and is for three
items. The first item is for additional duct and appurtenances needed for RTU-3 on the
roof due to an existing beam in the way of the original location. The second item is for
additional controls needed to operate a new air handler and heater in the basement of the
sludge processing building. The third item is for new duct heater, enthalpy economizers,
additional controls and electrical connections for the 3 roof top heating and air
conditioning units. This resulted from vendor and contractor feedback on a better method
to install and operate these 3 units.

The total amount of this change order comes to $54,099.1. Wright Pierce and the
Wastewater Department have reviewed these costs and it appears to be reasonable for the
work involved. The new value of their contract following approval of this change order
will be $951,055.10.

B-6.1

CHANGE ORDER
No. 3
PROJECT: _HVAC Upgrade DATE OF ISSUANCE:
OWNER: City of Nashua
229 Main St, Nashua, NH 03062
(Address)
CONTRACTOR: Monadnock Building Co. OWNER’s Project No. _1IFB0292-041017
CONTRACT FOR: _HVAC Upgrade ENGINEER —_ Wright-Pierce

ENGINEER’s Project No. _13089K

You are directed to make the following changes in the Contract Documents.
Description: Refer to the attachments.

Purpose of Change Order: Refer to the attachments.

Justification: This work was not included in the original contract documents.
Attachments: Change Order No. 3 back-up documentation.

CHANGE IN CONTRACT PRICE CHANGE IN CONTRACT TIME
Original Contract Price Original Contract Time |
$ _ 566,717.00 330 days
(days or date) |
Previous Change Orders Net change from previous Change Orders |
$ 330,239.00 0

(days)

Contract Price prior to this Change Order
$ 896,956.00 .

Contract Time prior to this Change Order

330 days
(days or date)

Net Increase (Decrease) of this Change Order
$ _ 54,099.10

Net Increase (decrease) this Change Order

0
(days)

Contract Price with all approved Change Orders
$ 951,055.30

Contract Time with all Change Orders

330 days
(days or date)

This document will become a supplement to the CONTRACT and all provisions will apply hereto. The

attached Contractor’s Revised Project Schedule reflects increases or decreases in Contract Time as

authorized by this Change Order.

Stipulated price and time adjustment includes all costs and time associated with the above described change.
Contractor waives all rights for additional time extension for said change. Contractor and Owner agree that
the price(s) and time adjustment(s) stated above are equitable and acceptable to both parties.

RECOMMENDED: APPROVED:
weal By:
Owner

5. Ldn
By:
Ci

O

gineer
UPI?
te Date

Date

T3ANROK

CITY OF NASHUA, NEW HAMPSHIRE
WWTF HVAC UPGRADE PROJECT

Change Order No. 3 Summary

Item No.|Description Reason Amount Notes
Additional work related to the installation of RTU#3 due to unknown MCBC Change Proposal 0501, dated
1 RTU#3 Ductwork existing conditions. $ 11,983.12 |09/05/17
SAHOU #1 Electrical & New Additional work related to replacement of existing (non-functioning) MCBC Change Proposal 0504, dated
2 Controls pheumatic controls and electrical work for SAHU-1. $ 19,967.73 ]09/27/17
MCEC Change Proposal 9505, dated
3 RTU #1, #2, #3 Additional equipment required for the rooftop units to function properly. $ 22,148.25 } 10/20/17

Total

$ 54,099.10

MER OCI a &

ae 2 oe oe a,
Be, SU ener & Ch
BLD &. h CLI eae

Serving the Connmercial end Retail ladusiry

32 FITZGERALD DRIVE, UNIT #10 JAFFREY, NEW HAMPSHIRE 03452
PH. 603-878-0810 FAX 603-878-0809

ADDITIONAL WORK
LUMP SUM PROPOSAL

October 27, 2017 REVISED Page 1of9
City of Nashua

Central Purchasing

229 Main Street

Nashua, New Hampshire 03060

RE: Nashua Wastewater Treatment Facility HVAC Upgrades
2 Sawmill Road
Nashua, N.H. 03060

Complete work in accordance with plans by Wright Pierce Engineers dated “Issued For
Bid 3/17”, Addenda 1&2, verifications of existing conditions and subsequent
conversations with Wright-Pierce Project Engineer Kristen Lemansey as it relates to
EWO #0501 for RTU #3. Should you have any questions, or need further clarification,
please feel free to contact me at your earliest convenience.

TOTAL LUMP SUM PROPOSAL AMOUNT $ 11,983.12
(Eleven Thousand Nine Hundred Eighty Three Dollars and Twelve Cents)

Respectfully Supmitted

Dan Callahan — Vice President
Monadnock Commercial Building Co.

Vonadnock

COMMERCIAL

Building Co.

Serving the Commercial and sain industry
BILL TO = _ City of Nashua, N.H. DATE 9/57
229 Main Street, Nashua, N.H. 03060 JOB # 01705
JOB NAME NWWTF - HVAC Upgrades ADDITIONAL WORK

JOBLOCATION 2 Sawmill Rd., Nashua, N.H, 03060
|
Additional work related to the installation of RTU ue to

AUTHORIZATION # 0501

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Architectural Fees

FEE
TOTAL
BONDING
TOTAL
to same
in the original contract unless otherwise stipulated.

Monadnock Commercial Building Co. date

City of Nashua Authorized Representative date

32 FITZGERALD DRIVE, UNIT 10 JAFFREY, N.H. 03452 Ph 603-593-5311 Fx 603-593-5314

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ROCKWELL ROOFING, INC.

44 Pond Street; Leominster, MA 01453 Phone: 978-537-7825 Fax: 978-537-3867

CHANGE ORDER REQUEST #001 R1

RE: Flashing for Additional 18"x18" Curb & 1 Flue

ATTENTION: | Dan Callahan DATE: 9.5.17
COMPANY: | Monadnock Commercial Building, Co. | PROJECT: | Nashua WWTF
ADDRESS: | 32 Fitzgerald Drive, Unit 10 ADDRESS: {| Sawmill Road
Jaffrey, NH 03452 Nashua, NH
TELEPHONE: PROJECT TELEPHONE:
FACSIMILE : PROJECT FACSIMILE:

WE HEREBY AGREE TO MAKE THE CHANGE(S) SPECIFIED BELOW:

e Following is a description of the additional cost associated with:

© Flashing for an additional 18°x18” curb and 1 flue.

Deduct: Value:
- Flashing for } fue $550.00
- Flashing for an 18°x18” curb $750.00
- 15% Mark-Up $195.00
Total: $1,495.00
WE AGREE HEREBY TO MAKE THE CHANGE(S) SPECIFIED ABOVE AT THIS PRICE | ADD $1,495.00

e If accepted please issue the office a change order so that we may
proceed with the work.

ACCEPTED - THE ABOVE PRICES AND SPECIFICATIONS OF

THIS CHANGE ORDER ARE SATISFACTORY AND ARE HEREBY

ACCEPTED. ALL WORK TO BE PERFORMED UNDER SAME DATE OF
TERMS AND CONDITIONS 4S SPECIFIED IN ORIGINAL ACCEPTANCE
CONTRACT UNLESS OTHERWISE STIPULATED

SIGNATURE

Submitted By: Amber Uguccicni

CHANGE ORDER

DATE: 8/23/2017

CACICO# 02

TO: Monadnock Building Co.
32 Fitzgerald Dr. Unit 10
Jaffery, NH 03452

ATTN: Dan Callanan

RE: Nashua WWTF - RTU-3 Roof Duct —

We hereby agree to make the change (s) Specified below:

Add duct on the roof for RTU-3 to avoid the existing beam in the ceiling.
Add roof curbs, duct supports and insulation for the roof duct.

Each Qty , Total

Roof curbs and duct supports. ($950.00 mat. & 6Hrs.) $950.00 1 $950.00
Deduct for existing duct layout ($600.00 mat. & 31 Hrs.) ($600.00) 1 ($600.00}
Add for new duct layout ($400.00 mat. & 34Hrs.) $400.00 1 $400.00
1 $0.00
Total Material $750.00
O.H. & Profit 15% $862.50
a
Labor Hours 9 X $105.00 = $945.00
Materials = $862.50
Subs = $7,339.50
TAXPERCENT 0% Taxes = $0.00
Total = $9,147.00
NEW TOTAL CONTRACT PRICE = $0.00
CAC Project Manager DATE: 9/6/2017
This Change Order Adds Q Days To The Contract Time.
ACCEPT: The above prices and specifications of this change order are satisfactory and
are hereby accepted. All work to be performed under the same terms and conditions
as specified in the original contract unless otherwise stipulated here within.
SIGNATURE OF PERSON AUTHORIZED TO ACCEPT:
DATE:
PLEASE SIGN AND RETURN ONE COPY CAC MECHANICAL SERVICES, INC.
ONLY A SIGNED, RETURNED COPY WILL START THE FIELD WORK.
CAC MECHANICAL SERVICES. INC

68F Stiles Rd.
SALEM, NH 03079
1-603-893-6618 PHONE 1-603-870-5436 FAX

Dan Callahan <dan_callahan@comcast.net> 10/30/2017 8:31 AM
Fwd: Re: FW: Nashua Quote

To Dan Callahan <dan_callahan@comcast.net>

Dan,
My change order (I just sent another copy) has the deduct line item in it. Also, the labor is what it is. It has to be
wrapped twice and is labor intensive.

Robert Delesare, bh.

Estimator / Project Manager

CAC Wiechanical Services, Inc.
68F Stiles Rd.

Salem, NH 03079

603-893-6618 x233

robdir@cacmsi.com

On September 19, 2017 at 2:28 PM Rob DeCesare Jr <robdir@cacmsi.corn> wrote:

Dan,

The original spec calls for 2” insulation. The armaflex insulation is less expensive and easier to work with in
a 1” roll, so they double wrep the 1”. That’s why the square footage is so much. it still works out less then

using 2” thick sheets.

Robert DeClesare. th.

Estimator / Project Manager

CAC Mechanica! Services, inc.
68F Stiles Rd.

Saiem, NH 03079

603-893-6618 x233

robdir@cacmsi.com