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d. Instrumentation, controls and SCADA system components will be

evaluated by an instrumentation engineer.

Electrical power distribution systems will be evaluated by an electrical
engineer. Electrical standby generators will be evaluated by an electrical
engineer and mechanical engineer.

Roadways, access drives, parking areas and walkways will be assessed by

a civil engineer.

3. Each discipline engineer will prepare a memorandum that summarizes the

findings from the site visit including the specific condition assessment results as

well as larger planning issues such as opportunities to improve energy efficiency

or enhance performance and reliability. Provide recommendations for

maintenance, such as coatings and other restorative measures.

F. Comprehensive Plant Evaluation

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1.

Treatment Plant Unit Process Analysis: This subtask includes documentation of

existing conditions (completed under Task F), treatment capacities, present needs,

and anticipated future needs based on appropriate design standards and anticipated

future requirements. Future considerations will include potential effluent standards

based on general EPA permitting trends in the watershed and also the preliminary

draft NPDES permit. The following major systems will be included in the

comprehensive plant evaluation:

a.
b.

a 9

m0 rho

pee

Cet

Influent Screening

Influent Pumping

Grit Removal

Primary Clarification System

Activated Sludge System (blowers, diffusers, RAS/WAS pumping)
Secondary Clarification System

Disinfection

Gravity Thickeners

WAS Sludge Thickening and Storage

Sludge Pumping and Conveyance systems

6 Wright-Pierce

k. Anaerobic Digestion System

1. Sludge Dewatering

m. Wet Weather Treatment Facility (influent screening, pumping, and Actiflo
process)

n. Instrumentation and Control, SCADA System

o. Odor Control Systems

2. Prepare a comprehensive process flow diagram for the main WWTF and the
WWFETF showing all major return flows.
3. Building Systems and Site Evaluation

a. Evaluate WWTF buildings and structures for current condition
(completed under Task F), compliance with applicable codes and
necessary improvements including structural integrity, heating and
ventilation systems, roofing systems, architectural items.

b. Evaluate all existing power distribution and electrical systems, including
transformer(s), MCC's and standby power generation for current condition
(completed under Task F), compliance with applicable codes and identify
necessary improvements for present and future load needs.

c. Review current FEMA flood maps for floodplain and required finished
floor elevations. Assess site conditions (completed under Task F) for

present and recommended future scenarios.

G. Sludge Handling and Disposal/Beneficial Reuse
1. Evaluate existing solids handling and anaerobic digestion operation and assess
impacts of upcoming phosphorus removal and future flows and loads and unit

process changes on the operation.

H. Evaluate alternatives for handling peak wet weather flows through the secondary
treatment process of the main WWTF

1. Evaluate improvements that could be implemented to improve the WWTF’s

capability to handle short-term wet weather peak flows and to recover from these

flows. The improvements to be evaluated are:

12/10/19 7 Wright-Pierce

a. Process modifications to improve mixed liquor settleability and retain solids

within the aeration tanks and/or clarifiers;

I. Evaluate Nitrogen and Phosphorus Removal Alternatives

1.

“vw fF YN

Perform an initial screening of potential phosphorus and long-term nitrogen
removal alternatives.

Calibrate process model.

Perform computer modeling to evaluate enhanced biological phosphorus removal.
Evaluate chemical phosphorus removal alternatives.

After the nitrogen removal technologies have been screened and identified, perform
computer modeling to evaluate the most viable alternatives.

a. Long-term nitrogen removal alternatives will be primarily focused on
processes that can achieve effluent total nitrogen levels between 6 to 10
mg/l.

b. Considerations will be given to future nitrogen removal processes than can
achieve LOT nitrogen levels. However, process modeling will not be
conducted for those processes as part of this facility plan.

Perform a life-cycle cost analysis of each of the viable phosphorus removal
alternatives identified and evaluate the advantages and disadvantages of each. For
budgetary purposes, assume up to 2 phosphorus removal alternatives will be
evaluated in detail.

Perform a life-cycle cost analysis of each of the viable nitrogen removal alternatives
identified and evaluate the advantages and disadvantages of each. For budgetary

purposes, assume up to 2 nitrogen removal alternatives will be evaluated in detail.

J. Development of Recommended Plan

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1.

Review overall upgrade needs and anticipated timing and develop overall
implementation plan addressing:
a. Any phasing of improvements based on either anticipated future discharge
criteria changes or anticipated growth in future flows and loads,

b. Summarizing recommended unit process upgrades,

8 Wright-Pierce

c. Planning level capital cost estimate as well as estimates of impacts on
operating costs.
2. Summarize implementation plan recommendations and hold a workshop with
City staff to review and discuss. Workshop results to be included in Draft Report
(Task L).

K. Report
1. Generate a Draft Report summarizing the analysis, findings and recommendations
of facility planning efforts.
2. Meet with City staff, and if desired NHDES to discuss report and to review
comments.

3. Finalize the report and present to City staff.

L. CWSRF Assistance
1. Assist the City in preparing Clean Water State Revolving Fund Loan applications

for planning principal forgiveness and asset management principal forgiveness.

ENGINEER assumes that key City staff (i.e. WWTF Operations Manager; WWTF operational
staff, and City Planner as needed) will be available for the meetings/workshops identified above,
and will provide Wright-Pierce with necessary information including any available flow studies,

reports, plans, mapping, data, master plans, GIS files, and feedback/decisions, etc.

12/10/19 9 Wright-Pierce

II. Schedule

ENGINEER shall complete the above tasks within 365 days of the CLIENT's written

Authorization to Proceed. The Tasks will generally be completed as follows:

12/10/19

Receive NTP from City January 2020
Task A January 2020
Task C January — April 2020
Task D January — April 2020
Task E April — August 2020
Task F May — September 2020
Task L June 2020 (CWSRF
Applications due)
Task G August - September 2020
Task H August - September 2020
Task IJ August - October 2020
Task J November 2020
Task K.1 (Draft Report) December 2020
Task K.3 (Final Report) January 2021

10

Wright-Pierce

SUMMARY OF ESTIMATED STAFF EFFORT (HOURS) AND COSTS
FACILITY PLANNING STUOY
CITY OF NASHUA, NH

TOTAL DIRECT LABOR
TASK DESCRIPTIONS HOURS NON-LABOR SUBS cost

Progress

cursent/future Il flows
$1,036.00

WWF
Plant Infrastructure Assessment --

technical memoranda

Process Flow
Eval
ang
Evaluate oxisting opprations

Evaluate
$1

i,
__ $728.

of
LCCA of $8
of
Dovelop Imptemantation plan . $4,640.00
with Staff $1.
Report

Assistance .
ROURS
Direct Labor $98,620.00
indirect Labar $165,178.64
Non-Lahor $2,600.00
Subcantractor $7,500.00
Sub Markup $0.00
Fixad Fee $26,101.36

Tatal Fae $300,000.00

2m DW SF WN

*

10.
11.
12.
13.
14.
15.
16.
17.
18.
19,
20.
21.
22.
23.
24.
25.
26.
27.
28.
29,
30.
31.

EXHIBIT B

CITY OF NASHUA
PROFESSIONAL SERVICES
GENERAL TERMS and CONDITIONS

DEFINITIONS

PROFESSIONAL ENGINEER STATUS
STANDARD OF CARE

CITY OF NASHUA REPRESENTATIVE
CHANGES TO SCOPE OF WORK
CITY OF NASHUA COOPERATION

DISCOVERY OF CONFLICTS, ERRORS, OMISSIONS, AMBIGUITIES, OR
DISCREPANCIES

TERMINATION OF CONTRACT

DISPUTE RESOLUTION

NO DAMAGES FOR DELAY

INSURANCE

INDEMNIFICATION

FISCAL CONTINGENCY

COMPENSATION

COMPLIANCE WITH APPLICABLE LAWS
NONDISCRIMINATION

ENDORSEMENT

ASSIGNMENTS, TRANSFER, DELEGATION, OR SUBCONTRACTING
CITY INSPECTION OF CONTRACT MATERIALS
DISPOSITION OF CONTRACT MATERIALS

PUBLIC RECORDS LAW, COPYRIGHTS, AND PATENTS
FINAL ACCEPTANCE

TAXES

NON-WAIVER OF TERMS AND CONDITIONS

RIGHTS AND REMEDIES

PROHIBITED INTERESTS

THIRD PARTY INTERESTS AND LIABILITIES
SURVIVAL OF RIGHTS AND OBLIGATIONS
SEVERABILITY

MODIFICATION OF CONTRACT AND ENTIRE AGREEMENT
CHOICE OF LAW AND VENUE

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General Terms and Conditions

DEFINITIONS Unless otherwise required by the context, "Professional Engineer”, and its
successors, transferees and assignees (together “Professional Engineer”) includes any of the
Professional Engineer's consultants, sub consultants, contractors, and subcontractors

PROFESSIONAL ENGINEER STATUS The parties agree that Professional Engineer shall have the
status of and shall perform all work under this contract as a Professional Engineer, maintaining
contro] over all its consultants, sub consultants, contractors, or subcontractors. The only
contractual relationship created by this contract is between the City of Nashua and Professional
Engineer, and nothing in this contract shall create any contractual relationship between the City
of Nashua and Professional Engineer's consultants, sub consultants, contractors, or
subcontractors. The parties also agree that Professional Engineer is not a City of Nashua
employee and that there shall be no:

(1) Withholding of income taxes by the City of Nashua:

(2) Industrial insurance coverage provided by the City of Nashua;

(3) Participation in group insurance plans which may be available to employees of
the City of Nashua;

(4) Participation or contributions by either the Professional Engineer or the City of
Nashua to the public employee’s retirement system;

(5) Accumulation of vacation leave or sick leave provided by the City of Nashua;

(6) Unemployment compensation coverage provided by the City of Nashua.

STANDARD OF CARE Professional Engineer shall be responsible for the professional quality,
technical accuracy, timely completion, and coordination of all work performed under this
contract. Professional Engineer warrants that all work shall be performed with the degree of
professional skill, care, diligence, and sound practices and judgment that are normally exercised
by recognized professional firms with respect to services of a similar nature. It shall be the duty
of Professional Engineer to assure at its own expense that all work is technically sound and in
conformance with all applicable federal, state, and local laws, statutes, regulations, ordinances,
orders, or other requirements. In addition to all other rights which the City of Nashua may have,
Professional Engineer shall, at its own expense and without additional compensation, re-perform
work to correct or revise any deficiencies, omissions, or errors in the work or the product of the
work or which result from Professional Engineer's failure to perform in accordance with this
standard of care. Any approval by the City of Nashua of any products or services furnished or
used by Professional Engineer shall not in any way relieve Professional Engineer of the
responsibility for professional and technical accuracy and adequacy of its work. City of Nashua
review, approval, or acceptance of, or payment for any of Professional Engineer's work under this
contract shall not operate as a waiver of any of the City of Nashua's rights or causes of action
under this contract, and Professional Engineer shall be and remain liable in accordance with the
terms of the contract and applicable law.

Professional Engineer shall furnish competent and skilled personnel to perform the work under
this contract. The City of Nashua reserves the right to approve key personnel assigned by
Professional Engineer to perform work under this contract. Approved key personnel shall not be
taken off of the project by Professional Engineer without the prior written approval of the City of
Nashua, except in the event of termination of employment. Professional Engineer shall, if
requested to do so by the City of Nashua, remove from the job any personnel whom the City of
Nashua determines to be incompetent, dishonest, or uncooperative.

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4. 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 Engineer, and any other communication about the contract shall be addressed or be
delivered to the City of Nashua Representative.

5. 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 Engineer's
performance under the contract. Professional Engineer 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 Engineer should proceed with any or all of the
proposed change. If the change causes an increase or a decrease in Professional Engineer'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 Engineer for
adjustment under this clause shall be asserted in writing within 30 days of the date the City of
Nashua notified Professional Engineer of the change.

When Professional Engineer seeks changes, Professional Engineer 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 Engineer should proceed with any or all of the proposed change.

Except as provided in this paragraph, Professional Engineer 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.

6. CITY OF NASHUA COOPERATION The City of Nashua agrees that its personnel will cooperate
with Professional Engineer in the performance of its work under this contract and that such
personnel will be available to Professional Engineer 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 Engineer with access to City of Nashua
records in a reasonable time and manner and to schedule items that require action by the Board of
Public Works and Finance Committee in a timely manner. The City of Nashua and Professional
Engineer also agree to attend all meetings called by the City of Nashua or Professional Engineer
to discuss the work under the Contract, and that Professional Engineer may elect to conduct and
record such meetings and shall later distribute prepared minutes of the meeting to the City of
Nashua.

7. DISCOVERY OF CONFLICTS, ERRORS, OMISSIONS, AMBIGUITIES, OR DISCREPANCIES
Professional Engineer 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 Engineer. All future questions Professional Engineer 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
for Professional Engineer's question or position. The City of Nashua representative shall render a

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decision within 15 calendar days. The City of Nashua's decision on the matter is final. Any work
affected by a conflict, error, omission, or discrepancy which has been performed by Professional
Engineer prior to having received the City of Nashua’s resolution shall be at Professional
Engineer's risk and expense. At all times, Professional Engineer shall carry on the work under
this contract and maintain and complete work in accordance with the requirements of the contract
or determination of the City of Nashua. Professional Engineer is responsible for requesting
clarification or interpretation and is solely liable for any cost or expense arising from its failure to
do so.

TERMINATION OF CONTRACT

A. TERMINATION, ABANDONMENT, OR SUSPENSION AT WILL. The City of Nashua, in its sole
discretion, shall have the right to terminate, abandon, or suspend all or part of the project and
contract at will. If the City of Nashua chooses to terminate, abandon, or suspend all or part of the
project, it shall provide Professional Engineer 10 day’s written notice of its intent to do so.

If all or part of the project is suspended for more than 90 days, the suspension shall be treated as a
termination at will of all or part of the project and contract.

Upon receipt of notice of termination, abandonment, or suspension at will, Professional Engineer
shall:

1. Immediately discontinue work on the date and to the extent specified in the notice.

2. Place no further orders or subcontracts for materials, services, or facilities, other than as

may be necessary or required for completion of such portion of work under the contract

that is not terminated.

Immediately make every reasonable effort to obtain cancellation upon terms

satisfactory to the City of Nashua of all orders or subcontracts to the extent they relate

to the performance of work terminated, abandoned, or suspended under the notice,

assign to the City of Nashua any orders or subcontracts specified in the notice, and

revoke agreements specified in the notice.

4, Not resume work after the effective date of a notice of suspension until receipt of a
written notice from the City of Nashua to resume performance.

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In the event of a termination, abandonment, or suspension at will, Professional Engineer shall
receive all amounts due and not previously paid to Professional Engineer for work satisfactonly
completed in accordance with the contract prior to the date of the notice and compensation for
work thereafter completed as specified in the notice. No amount shall be allowed or paid for
anticipated profit on unperformed services or other unperformed work.

B. TERMINATION FOR CAUSE This agreement may be terminated by the City of Nashua on 10
calendar day’s written notice to Professional Engineer in the event of a failure by Professional
Engineer to adhere to any or all the terms and conditions of the contract or for failure to
satisfactorily, in the sole opinion of the City of Nashua, to complete or make sufficient progress
on the work in a timely and professional manner. Professional Engineer shall be given an
opportunity for consultation with the City of Nashua prior to the effective date of the termination.
Professional Engineer may terminate the contract on 10 calendar days written notice if, through
no fault of Professional Engineer, the City of Nashua fails to pay Professional Engineer for 45
days after the date of approval by the City of Nashua of any Application for Payment.

Upon receipt of notice of termination for cause, Professional Engineer shall:

1. Immediately discontinue work on the date and to the extent specified in the notice.
2. Provide the City of Nashua with a list of all unperformed services.

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