Search

Mis. Osborne
November 18, 2016

Page 30f5

6.

identify equipment, structure, piping, controls or operations related issues affeciing tne Wet
Weather Facility’s capacity to effectively handle and treat the identified design peak flows
reaching the facility;

Develop a capital upgrade plan to address identified issues.

SCOPE OF SERVICES

Based on the present conditions and project objectives listed above, we have developed the following
proposed scope of services:

A. Influent Hydraulic Analysis:

1.

8.

Meet with City staff to confirm the hydraulic basis and objectives, including plant influent flows
ana anv other observed hydraulic limitations (e.g. hydraulic bottlenecks, or unequal flow split
issues).

Review wet weather flow influent pumping systems operational information for the present
operational approach, and key wet weather flow equipment systems.

Review the existing record drawings to verify dimensional and layout information of structures
and flow path elements, such as piping, valves, instrumentation, weir locations and heights.

Review existing information on the projected peak flows from the three influent sewers to the
plant, and evaluate the effective hydraulic capacities of the existing influent sewer system in the
immediate vicinity of the Wastewater Treatment Facility (considering pipe size and slope).

Investigate the rated capacity of the drop shaft vortex manhole, as well as possible operational
issues and subsequent modification options.

Evaluate the operation, control and calibration of the wet weather flow pumping facility,
including gates and equipment (influent screens and pumping system).

Develop a hydraulic model of the plant influent systems, including the influent sewers (on the
treatment facility property), and the influent hydraulics of the main pump station and wet
weather pump station. The model will be developed using the record drawings information.

a. Obtain historic data and cbservations on the water surface elevations, and flow data at
the wastewater treatment facility. Calibrate the model using available historic water
surface elevation and flow information.

b. Based on the projected flows, evaluate the design conditions for the wet weather systems
to flag what is undersized and robbing the needed system’s capacity.

c. Use the model to evaluate specific modification options to the structures and piping, or
control strategies to minimize future untreated wastewater overflows.

identify equipment, structure or piping capacity issues that are reducing the treatment facility’s
capability to satisfactorily handle the peak flows reaching the facility.

Ms. Osborne wn ,
(PER cscs

November 18, 2016
Page 4o0f5

OD ecees

S. Develop specific recommendations for wet weather flow system modifications, as well as
possible operational/controls changes required to minimize future overflow of untreated
wastewater.

B. Wet Weather Treatment System:

1.

Evaluate operation and control system modifications for improving the performance to the
wet weather flow treatment facility (Actiflo System) ideally so it can effectively treat pumped
wet weather flows of up to 60 mgd. This includes evaluation of the chemical and blast feed
systems, mixing/coagulation/maturing, effluent clarification, and sludge handling systems.

Identify any equipment, structure, piping, controls or operations which affect the Wet
Weather Facility’s capacity to effectively nandie and treat the design peak flows reaching the
facility.

Develop recommendations for wet weather treatment system modifications to improve the
effective treatment of identified design flows.

C. Summary Reports: Each of the above phases of work (Influent Hydraulic Analysis and Wet Weather
Treatment Systems) will result in:

1.

SCHEDULE

A technical memorandum summarizing the findings of the evaluations, and a capital upgrade
plan to address identified issues, including budgetary cost estimates associated with the
suggested modifications.

A technical workshop with City staff to review the preliminary modifications list, and
incorporate City comments in the final memoranda.

W-P will commence work on this project immediately upon receipt of authorization to proceed. We
expect to complete the above scope items within 16 weeks, and will be ready to move quickly into the
desired implementation phase selected by the City.

ESTIMATED FEE

Based on our proposed project scope, we estimate the effort to complete the various aspect of the work,

as follows:

@

influent Hydraulic Analysis - approximate effort of 120 staff hours and a total engineering fee
of $18,700.

Wet Weather Treatment System Evaluation - approximate effort of 100 staff hours and a
total engineering fee of $16,400.

Ms. Osborne
November 18, 2016
Page 5o0f5

We trust this proposal addresses your needs to evaluate the Wet Weather Facility. We are available to
further discuss this project and fine tune the associated tasks to meet your budgetary constraints or
expectations. We look forward to the opportunity to serve the City.

Very truly yours,
WRIGHT-PIERCE

Timothy Vadney, P.E.
Senior Project Manager

\, THE CITY OF NASHUA “The Gate City’

Financtal Services

ae"

Purchasing Department

NI 2 PR RE NES SENG AT APE TS SAN) 78 RE MES aS

December 29, 2016
Memo #17-087

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: AWARD FOR PURCHASE AND INSTALATION OF SIPHON AND MANHOLE COVERS

(VALUE: $49,875)
DEPARTMENT: 169 WASTEWATER; FUND: WASTEWATER

Please see the attached communication from Noelle Osborne, Wastewater Department Operations
Supervisor, dated December 29, 2016 for the information related to this purchase.

Pursuant to § 5-78 iiajor purchases (greater than $40,000) 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 (12/29/2016 meeting) and

the Purchasing Department recommend this contact award in an amount not to exceed $49,875 to
Wiliam P. Davis Excavation of Porismouth, NH.

Respectfully, "

SirPitle—
"Dan Kooken
Purchasing Manager

Ce: N Osborne L Fauteux

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

To:

From:

Re:

C. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: December 29, 2016

Noelle Osborne, Plant Operations Supervisor
Wastewater Department

Installation of Siphon Covers

To approve the contract for the installation of new siphon and manhole covers at various
locations to William P. Davis Excavation, LLC, of Portsmouth, NH in the amount of
$49,875. Funding will be through: Department: 169 Wastewater; Fund: Wastewater;
Account Classification: 54 Property Services.

William P. Davis Construction LLC

There are 10 siphon structures and 3 manholes that are in need of a more secure
(lockable} cover with an internal safety grate to prevent unauthorized entry. Many of
these structures are at remote locations where past vandalism and thefts have occurred.
This project will have all top covers more securely fastened and internal safety grates
installed that are lockable to prevent unauthorized entry or an accidental fall into the
structure.

Requests for bids were sent tc 5 contractors of which 2 responded. Another company,
William ?. Davis Excavation, submitted a bid for a total of 3 bids received. A summary
of the bids is provided in the table below:

William P. Davis Excavation Portsmouth, $49,875
NH

TLD Earth Tech Hudson, NH $78,585

TBuck Construction Auburn, NH $164,439

The low bidder, William P. Davis Excavation, has not previously worked for the City but
has done similar work for other Towns, general contractors and institutions. Their
references were all favorable with a history of performing high quality work within the
available budget.

Addendum [- Revised Bid Table

Cover Location Costs

CS0006-Upstr $3,500.00
BAE-Upsir $3,500.00
BAE-Downsir $3,500.00
Main St-Upstr $3,875.00
Main St-Downstr $6,650.00
Main $1-Downstr $6,650.00
Fairmount-Upstr $2,850.00
Fairmount-Downsir | 2 , 850.00
Broad St-Upstr $2,850.00
Broad St-Downstr $2,856.00
CS0-005 $2,850.00
CSO-003 1$2,850.00
MIH-1 $1,700.00
MH-2 $2,700.00
MH-3 $1,700.00

Total Costs: $49,875.00

Contractor Name: William P. Davis Excavation LLC

Address: PO Box 758 - HAMPTON, NH 03843

Phone: 603.944.5844
Email; WILL@WPDAVISEXCAVATION.COM

STANDARD FORM OF AGREEMENT
BETWEEN OWNER AND CONTRACTOR

This agreement is made:

BETWEEN the OWNER: City of Nashua, New Hampshire

229 Main Street
Nashua, NH 03060-2019

And the CONTRACTOR: William P. Davis, Excavation LLC

and its successors, transferees and assignees
(together “CONTRACTOR”)

PO Box 758

Hampton, NH 03843

For the following Project: |_RFP1087-120916

Upgrade of Sewer System Siphon Covers

ARTICLE 1 —- THE CONTRACT DOCUMENTS

The CONTRACTOR shall complete the work described in the Contract Documents for this
project. The documents consist of:

L.

Z:

Aw SY

8.

This Agreement signed by the OWNER and CONTRACTOR, including the General
Terms and Conditions;

Exhibit B - RFP1087-120916, Upgrade of Sewer System Siphon Covers including
Addendum! issued November 28, 2016;

Exhibit C - Drawings and Specifications provided in the bid documents;

Exhibit D - Bid Table Submission dtd December 9, 2016;

Exhibit E - Payment and Performance Bonds;

Exhibit F - Insurance Certificate;

Written change orders for minor changes in the Work issued after execution of this

Agreement; and
Fully Executed OWNER Purchase Order

The Contract represents the entire and integrated agreement between the parties and supersedes
prior negotiations, proposals, representations or agreements, either written or oral. Any other
documents which are not listed in this Article are not part of the Contract.

In the event of a conflict between the terms of the Proposals and the terms of this Agreement, a
written change order and/or fully executed OWNER Purchase Order, the terms of this Agreement,
the written change order or the fully executed OWNER Purchase Order shall control over the
terms of the Proposals

Page 1 of 12

ARTICLE 2 — DATE OF COMMENCEMENT AND WORK PERFORMANCE

The date of commencement shall be the date of the Notice to Proceed. The CONTRACTOR shall
submit shop drawings of the covers - grates (from fabricators) within 10 working days of the
Notice to Proceed. Upon approval, by the OWNER of the submitted shop drawings of the cover —
grates (from the fabricator), the OWNER shall communicate to the CONTRACTOR that the
orders may be placed. Upon receipt of the covers - grates (from fabricators), the OWNER and
CONTRACTOR will establish the Sequence of Work and Milestone Installation dates at a pre-
installation meeting.

ARTICLE 3~ CONTRACT SUM

Subject to additions and deductions by Change Order, the OWNER shall pay CONTRACTOR,
in accordance with the Contract Documents, the Contract Sum of:

Forty-Nine Thousand Eight Hundred Seventy-Five Dollars ($49,875.00)

The Contract Sum shall include all items and services necessary for the proper execution and
completion of the Work.

ARTICLE 4 — INSURANCE AND INDEMNIFICATION

CONTRACTOR shall carry and maintain in effect during the performance of services under this
contract:
> General liability insurance in the amount of $1,000,000 per occurrence; $2,000,000
aggregate;

> Motor Vehicle Liability: $1,000,000 Combined Single Limit;
*Coverage must include all owned, non-owned and hired vehicles.

> Workers’ Compensation Coverage in compliance with the State of NH Statutes,
$100,000/$500,000/$100,000.

CONTRACTOR and subcontractors at every tier will fully comply with NH RSA Chapter
281-A, “Workers’ Compensation”.

The parties agree that CONTRACTOR shall have the status of and shall perform all work under
this contract as an independent CONTRACTOR, maintaining control over all its consultants, sub
consultants, or subcontractor’s. The only contractual relationship created by this contract is
between the OWNER and CONTRACTOR, and nothing in this contract shall create any
contractual relationship between the OWNER and CONTRACTOR’s consultants, sub
consultants, or subcontractor’s. The parties also agree that CONTRACTOR is not an OWNER
employee and that there shall be no:

1. Withholding of income taxes by the OWNER:
2. Industrial insurance coverage provided by the OWNER;
3. Participation in group insurance plans which may be available to employees of the

OWNER;

Page 2 of 12

4. Participation or contributions by either the independent CONTRACTOR or the OWNER
to the public employee’s retirement system;

Accumulation of vacation leave or sick leave provided by the OWNER;

Unemployment compensation coverage provided by the OWNER.

VA

CONTRACTOR will provide the OWNER with certificates of insurance for coverage as listed
below and endorsements affecting coverage required by the contract within ten calendar days after
the OWNER issues the notice of award. The OWNER requires thirty days written notice of
cancellation or material change in coverage. The certificates and endorsements for each insurance
policy must be signed by a person authorized by the insurer and who is licensed by the State of
New Hampshire. General Liability and Auto Liability policies must name the OWNER as an
additional insured and reflect on the certificate of insurance. CONTRACTOR is responsible for
filing updated certificates of insurance with the OWNER's Risk Management Department during
the life of the contract.

> All deductibles and self-insured retentions shall be fully disclosed in the certificate(s) of
insurance.

> If aggregate limits of less than $2,000,000 are imposed on bodily injury and property
damage, CONTRACTOR must maintain umbrella liability insurance of at least
$1,000,000. All aggregates must be fully disclosed on the required certificate of insurance.

> The specified insurance requirements do not relieve CONTRACTOR of its
responsibilities or limit the amount of its liability to the OWNER or other persons, and
CONTRACTOR is encouraged to purchase such additional insurance, as it deems
necessary.

> The insurance provided herein is primary, and no insurance held or owned by the OWNER
shall be called upon to contribute to a loss.

>» CONTRACTOR is responsible for and required to remedy all damage or loss to any
property, including property of the OWNER, caused in whole or part by CONTRACTOR
or anyone employed, directed, or supervised by CONTRACTOR.

Regardless of any coverage provided by any insurance, CONTRACTOR agrees to indemnify
and shall defend and hold harmless the OWNER, its agents, officials, employees and
authorized representatives and their employees from and against any and all suits, causes of
action, legal or administrative proceedings, arbitrations, claims, demands, damages, liabilities,
interest, attorney’s fees, costs and expenses of any kind or nature in any manner caused,
occasioned, or contributed to in whole or in part by reason of any negligent act, omission, or
fault or willful misconduct, whether active or passive, ofp CONTRACTOR or of anyone acting
under its direction or control or on its behalf in connection with or incidental to the
performance of this contract. CONTRACTOR’s indemnity, defense and hold harmless
obligations, or portions thereof, shall not apply to liability caused by the sole negligence or
willful misconduct of the party indemnified or held harmless.

Page 3 of 12

General Terms and Conditions

ARTICLE 5 - GENERAL PROVISIONS

1

The Contract represents the entire and integrated agreement between the parties and
supersedes prior negotiations, representations or agreements, either written or oral. The
Contract may be amended or modified only by a written modification.

The term “Work” means the construction and services required by the Contract Documents,
and include all other labor, materials, equipment and services provided by the
CONTRACTOR to fulfill the CONTRACTOR’s obligations.

The intent of the Contract Documents is to include all items necessary for the proper
execution and completion of the Work by the CONTRACTOR. The Contract Documents
are complementary, and what is required by one shall be as binding as if required by all.

In the case of a discrepancy, calculated dimensions will govern over scaled dimensions,
Contract Drawings will govern over Standard Specifications, and Technical Specifications
will govern over both Contract Drawings and Standard Specifications. In the case of a
discrepancy between the Agreement and other Contract Documents, the more specific or
stringent obligation or requirement to the benefit of the OWNER shall take precedence.
The CONTRACTOR shall take no advantage of any apparent error or omission in the
Contract Drawings or Technical Specifications, and the Engineer will be permitted to make
such corrections and interpretations as may be deemed necessary to fulfill the intent of the
Contract Documents.

ARTICLE 6 - OWNER

l.

Except for permits and fees, which are the responsibility of the CONTRACTOR under the
Contract Documents, the OWNER shall obtain and pay for other necessary approvals,
easements, assessments and charges.

If the CONTRACTOR fails to correct Work that is not in accordance with the Contract
Documents, the OWNER may direct the CONTRACTOR in writing to stop the Work
until the correction is made.

If the CONTRACTOR defaults or neglects to carry out the Work in accordance with the
Contract Documents and fails within a seven (7) day period after receipt of written notice
from the OWNER to correct such default or neglect with diligence and promptness, the
OWNER may, without prejudice to other remedies, correct such deficiencies. In such
case, a Change Order shall be issued deducting the cost of correction from payments due
the CONTRACTOR.

The OWNER reserves the right to perform construction or operations related to the project
with the OWNER’s own forces, and to award separate contracts in connection with other
portions of the project.

The CONTRACTOR shall coordinate and cooperate with separate CONTRACTORs
employed by the OWNER.

Costs caused by delays or by improperly timed activities or defective construction shall be
borne by the responsible party.

Page 4 of 12