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A PROCESS ENERGY SERVICES, LLC London et aoes

ck. WATER @ WASTEWATER @ INDUSTRIAL WwW. processenergy.com

Phone: 603-537-1286

® Recent engineering facility evaluations/reports.
Data that we would like to request copies of include the following information:

12 months of facility operating reports and process spreadsheets
12 months of recorded equipment run times (if available)
12 months energy bills (electric, propane, natural gas and fuel oil) for the treatment facility
and pump stations.
e 12 months of digester process data (sludge flows, gas flow for heating, flared gas, etc...)

Providing some of this information before the initial site visit will help us develop an effective
work plan for equipment testing and system evaluation.

Task #2 Treatment Plant Energy Analysis and Report Develapment
The energy analysis will include the following tasks:
Review Energy Use and Rates

e Energy billing evaluation of facility energy use.
e Rate structure evaluation.

Energy Balance

To determine how energy is used within the facility, Process Energy Services will develop an
energy balance of the facility. This will include the following tasks:

e Develop inventory of all energy use equipment grouped by process

e Use a portable power meter and SCADA data when available to verify energy use and hours
of large horsepower equipment (over 10 hp).

e Comparison of energy balance with annual electric bills to verify data.

e Develop a heating system energy balance for each building at the plant site.

Treatment Plant Pump Systems Evaluations

A pump system analysis will be done for the pump systems at the plant. Evaluation tasks will
include:

Collect field data to determine typical pump operating point.

Determine the system static head value to develop pump system curves.

Compare existing pump system operation with the original design parameters.

Review pump efficiency improvements such as pump replacement or rebuilding.
Evaluate the potential savings of installing (or optimizing existing) variable speed drives.
Evaluate hydraulic and operational improvements that may improve efficiency.

A. PROCESS ENERGY SERVICES, LLC London satayete Road

ai WATER @ WASTEWATER @ INDUSTRIAL www.processenergy.com

Phone: 603-537-1286

Treatment Facility Process Analysis

This part of the evaluation includes an energy related analysis of each treatment facility process.
Specific areas that will be investigated include:

Review preliminary treatment systems and evaluate energy saving adjustments.

Evaluate primary clarifier performance.

Model the facility biological treatment system to evaluate process efficiency, potential
equipment efficiency improvements, and control system optimization.

e Evaluation of digester performance and optimal use of digester gas. The review will include
gas production analysis, effectiveness of boiler system and review of digester heat losses.
Potential measures will include the use of tank insulation, optimizing digester gas use for tank
and space heating and cogeneration system.

e Plant water system optimization by measuring pressure and flow using portable flow
instrumentation to evaluate system pressure requirements and end use optimization.

e Sludge process analysis to review energy usage of pumping, sludge holding tanks, thickening
and dewatering system.

Heating and Ventilation Systems
Building systems to be evaluated include:

e Heating and ventilation systems for each area to determine how systems can be improved
while still complying with NFPA 820A. A heat balance will be performed to evaluate the
energy impact of temperature control upgrades and ventilation adjustments,

Preliminary review of HVAC control systems
e Review potential of solar walls and heat recovery systems for high ventilation rate areas.

Cost/Benefit Analysis
Proposed energy saving projects will include:

e Conceptual cost estimate based on industry data.
Detailed energy saving calculations that include baseline development from SCADA data,
instantaneous electrical measurements, equipment performance curves and data loggers to
determine how equipment energy use varies.

e Electric energy measures will report savings in annual kWh (consumption) and kW
(demand).

e Cost/benefit analysis for each project

A. Process ENERGY SERVICES, LLC ate bean eit

cucu, WATER @ WASTEWATER @ INDUSTRIAL Wwww.processenergy.com

Phone: 603-537-1286

Task #3 Collection System Pump Station Design Review

The collection system includes thirteen pump stations that are currently in the process of being
upgraded. As part of this evaluation, Process Energy Services will perform a site review of each
pump station to establish an energy use baseline by taking equipment measurements and
collecting specification data. This energy use data will be compared to the utility bills to verify
the baseline.

Process Energy Services will also review the 30% design documents developed by the engineer to
determine if additional energy efficiency improvements would be cost effective to include in the
pump station upgrades.

Task #4 Complete Draft Report

Process Energy Services follows a comprehensive energy report format as shown below. All
recommendations include savings calculations, cost estimates, and a financial analysis of each
project. Specific sections of the report will include:

Executive Summary
Energy related process and building system review
Energy use profile of utility bills
Presentation of each cost savings opportunities as:
=" Operational Measures (OMs)
= Energy Conservation Measures (ECMs)
=" Energy Supply Measures (ESMs)
Appendices
= Energy calculations/equipment specifications/cost estimate for each
recommendation.
= Process model data
" Copy of utility rate schedules

As noted above, Process Energy Services will provide three categories of cost saving projects.
These include Operational Measures (OMs), which are improvements that can be done at minimal
cost, or for improvements that cannot be directly quantified (i.e. setting up an energy
management team). Energy Conservation Measures (ECMs) that include all energy saving
projects, which require an investment to realize savings, and Energy Supply Measures (ESMs)
that include alternative energy sources or utility rate schedule adjustments.

Task #5 Complete Final Report

After comments have been received and addressed, a final electronic and hard copy of the report
will be provided.

Av Process ENERGY SERVICES, LLC London evate Rose

aun, WATER @ WASTEWATER @ INDUSTRIAL www. processenergy.com

Phone: 603-537-1286

Proposed Cost

Process Energy Services proposes a not to exceed cost of $22,800 to complete the services
described for the wastewater treatment facility and thirteen-collection system pump stations. A
cost breakdown is provided below.

Task Hours Cost

Site Visit(s) & Equipment Testing 24 $ 2,880
Energy Analysis 90 $10,800
Report & Presentation 40 $ 4,800
Pump Station Review 30 $ 3,600
Administrative/Travel -- $720
Total Cost: $22,800

Based on the February 24, 2017 letter from the NH Department of Environmental Services, the
NHDES has offered to provide $20,000 in principal forgiveness. The remaining $2,800 will be
funded through a grant program with the U.S. Department of Energy.

Summary
We look forward to working with the City of Nashua on this project. Our goal is to develop a cost
effective energy evaluation that combines our experience with the practical input from plant staff.

Please call me at (603) 527-1286 if you have questions or require additional information.

Sincerely,

PROCESS ENERGY SERVICES, LLC

ae dat
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Steven Bolles
President

Accepted by: Date:

(name printed / title)

City of Nashua, NH

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) THE CITY OF NASHUA “The Gate City’

Financial Services.

Purchasing Department

June 1, 2017
Memo #17-129

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: HEADWORKS UPGRADE PRODECT — CHANGE ORDER #4 (VALUE: $27,625)
DEPARTMENT: 169 WASTEWATER; FUND: SRF LOAN
ACTIVITY: HEADWORKS UPGRADE

Please see the attached communication from Noelle Osborne, Wastewater Department Operations
Supervisor, dated May 18, 2017 for the information related to this purchase.

Pursuant to § 5-78 Major purchases (greater than $10,000) A. All supplies and contractual services,
except as otherwise provided herein, when the estimated cost thereof shall exceed $10,000 shall be
purchased by formal, written contract from the lowest responsible bidder, after due notice inviting bids.
The Wastewater Department Operations Supervisor, Board of Public Works (5/18/2017 meeting) and the

Purchasing Department recommend approval of this change order in the amount of $27,625 to T-Buck
Construction Inc of Auburn, ME.

Rgspectfully,, _

Os rc“
(Wo fue _—,
\! Dan Kooken

Purchasing Manager

Cc: N Osborne L Fauteux

229 Main Street « Nashua, New Hampshire 03061 Phone (603) 589-3330 Fax (603) 589-3233

From:

Re:

F. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: May 18, 2017

Noelle Osborne, Plant Operations Supervisor
Wastewater Department

Headworks Upgrade Project

To approve the change order to the Headworks Upgrades contract with T-Buck
Construction, Inc. in the amount of $27,625.06 Funding will be through: Department:
169 Wastewater; Fund: SRF Loan; Activity: Headworks Upgrades.

Change Order 4 Backup

The contract with TBuck for the Headworks Upgrades at the Wastewater Treatment
Facility is currently for $2,911,717.05, which includes all change orders to date.

This current change order is for 3 items. The first item is modifications of a vent duct to
accommodate a new HVAC project. The second is the relocation of a previously
unknown duct that was discovered during the men’s locker room expansion. The third
includes the relocation of power ducts in the ceiling that are within the floor space of
the new screenings room. The new screenings room will be a sealed room with its own
ventilation system to meet the requirements of a classified space. The overhead
conduits therefore have to be relocated to allow this classification. All of this work has
been reviewed and approved by the consultant Wright Pierce.

The total amount of this change order comes to $27,625.06. Wright Pierce and the
Wastewater Department have reviewed these costs and it appears to be in line with the
work to be done. The new value of their contract following this change order will be in
the amount of $2,939,342.11.

This project is an SRF funded project and the City will be seeking a State Aid Grant
(SAG) in the amount of 20% of the costs should such funding become available.

B-6.1
CHANGE ORDER
No, 4

PROJECT: Headworks Upgrade DATE OF ISSUANCE:

OWNER: City of Nashua

229 Main St, Nashua, NH 03062
(Address)

CONTRACTOR: T-Buck Construction, Inc. OWNER’s Project No,

CONTRACT FOR: —Headworks Upgrade ENGINEER _Wright-Pierce
ENGINEER ’s Project No. 13089

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: Work was not included in original contract documents.
Attachments: Change Order No. 4 Summary Sheet, Change Order No. 4 Items 1-3 back-up documentation.
CHANGE IN CONTRACT PRICE CHANGE IN CONTRACT TIME

Original Contract Price Original Contract Time

$ 2,848,222.00 455
(days or date}

Previous Change Orders Net change from previous Change Orders

63,495.05

31
(days)

Contract Price prior to this Change Order
2,911,717.05

Contract Time prior to this Change Order

486
(days or date)

Net Increase of this Change Order
27,625.06

Net Increase this Change Order
if

(days)

Contract Price with all approved Change Orders Contract Time with all Change Orders

$ 2,939,342.11 497
{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.

APPROVED: “GLA
By: By A y:

i Owner Contracto NHDES
S/ilaoi SB) tb} 17
Date Date Date Date

13089A

CITY OF NASHUA, NEW HAMPSHIRE
WWTF HEADWORKS UPGRADE PROJECT
Change Order No. 4 Summary

Item No./Description Reason Amount Notes

Modification to the 26-inch FRP bypass duct to accommodate additional HVAC

1 26-inch Bypass Duct equipment being installed on the roof of the Operations Building with the HVAC | § 8,081.25 ]T-Buck CP No. 18, 03/21/2017;
Upgrade project. WP-RFI-07, 02/21/2017

. . Unknown condition - vent required relocation in order to complete construction

: 4-inch Vent Relocation of wall in expanded Men's Locker Room area. $5,549.71 T-Buck CP No. 24, 04/03/2017
Unknown condition - communication/power ducts above the hallway ceiling

3 Screenings Room Soffit required relocation/construction of a soffit to avoid upgrading the conduits to $ 13,994.10
meet requirements of a classified space. T-Buck CP No. 25, 04/26/2017

Total [s 27,625.06 |

T. Buck Construction, Inc.

249 Merrow Rd Auburn, ME 04210
207-783-6223 * FAX 207-783-3970

PROPOSAL 18

}Proposal Submitted to:
Wright-Pierce

Street:

230 Commerce Way, Suite 302

Phone:

Fax:
Job Name

(802) 431-1422
(866) 783-7101

Date 3/21/2017

Nashua Wastewater Treatment Facility Headworks Upgrade

City, State & Zip Code:
Portsmouth, NH 03801

Job Location:

Nashua NH

Engineer:
Andy Morrill

Job Phone:

we hereby submit specifications and estimate for:

Provide labor, material and equipment to perform work as described in Wright-Pierces WP-RF1-07

Material
Labor

15% O&P

GC O&P 10%
TOTAL

$ 4,665.00
$ 1,800.00
$ 6,465.00
$ 969.75
$ 7,434.75
$ 646.50
$ 8,081.25

1) T Buck will request a 4 day extension to the contract completion time if this proposal is excepted

IGHT THOUSAND & EIGHTY ONE DOLLARS

fe Propose hereby to furnish material and labor complete in accordance with above specifications, for the sum of:
E

II material is guaranteed to be as specified. All work to be completed in a

orkmanlike manner according to standard practices. Any alteration or
deviation from above specifications involving extra costs will be executed only
upon written orders, and will become an extra charge over and above the

estimate. All agreements contigent upon strikes, accidents or delays beyond

Authorized
Signature

Mark McPheters

Note: This proposal may be withdrawn

lour control. Owner to carry fire, tornado and other necessary insurance. Our by us if not accepted within 5 days.
workers are fully covered by Workman's Compensation Insurance.

Acceptance of Proposal- The above prices, specifications and

ine work as specified. Payment will be made as outlined above.

Date of acceptance Signature

ARMAND KH. LEMIRE CQ. INC,
7 DARTMOUTH STREET
P.O. BOX 16454, HOOKSETT, NH. 03106
PHONE (603) 625-5233 FAX (603) 625-5679

CHANGE ORDER #8

COMPANY T Buck Construction
ATTENTION Bruce Kenney
DATE 3/1/17

PROJECT Nashua Headworks
LOCATION Nashua NH

Hi Bruce, this change order is for the work described in WP-RFI-07, pricing
is as follows.

3’) Additional 26” FRP duct @$430' $1,290.00
Misc resins, tapes and supplies $125.00
24) Additional labor hrs @$75 hr $1,800.00
Additional freight on FRP $800.00
Controls add from ENE $2,450.00
Subtotal $6,465.00
AELCO 15% MU $969.75

Total amount of this change order is $7,434.75

MECHANICAL CONTRACTORS — COMMERCIAL, INDUSTRIAL & RESIDENTIAL

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