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CHANGE ORDER

No. 2
PROJECT: Marshall Street Drainage Improvements
OWNER’S CONTRACT NO: N/A
EXECUTED CONTRACT DATE: June 13, 2018

DATE OF ISSUANCE: September 5, 2019 EFFECTIVE DATE: Upon City Approval
OWNER: City of Nashua, NH

OWNER’s Purchase Order NO.: 141603

CONTRACTOR: Thibeault Corporation of NE

ENGINEER: DPW Engineering

You are directed to make the following changes in the Contract Documents:

Description:

To make additional grading and drainage improvements, at 22 Marshall Street, that

includes removing t crumbling concrete road base and replacing with new gravel.

Change Order #2 1 of 2
Marshall St Drainage Improvements

Summary

CHANGE IN CONTRACT PRICE:

Original Contract Price

$35,000

CHANGE IN CONTRACT TIMES:
Original Contract Times

Substantial completion: N/A
Ready for final payment: N/A

Net changes from previous Change Orders

$9,550

Net change from previous Change Orders

NONE

Contract Price prior to this Change Order

$44,550

Contract Times prior to this Change Order

Substantial completion: N/A
Ready for final payment: N/A

Net Increase {decrease} of this Change Order

$20,000

Net Increase (decrease) of this Change Order

Contract Price with all approved Change Orders

Contract Times with all approved Change Orders

$64,550 Substantial completion: N/A
Ready for final payment: N/A

RECOMMENDED: ACCEPTED: APPROVED:
By: By: By:

DPW Representative Name Mayor Jim Donchess

(Authorized Signature) Contractor Owner
(Authorized Signature) (Authorized Signature)
Date:
Date: Date:

Change Order #2 2 of 2

Marshall St Drainage Improvements

THE CITY OF NASHUA “The Gate City’

Aldnuinistrative Services

Purchasing Department

August 29, 2019
Memo #20-024

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: MONICA DRIVE DRAINAGE IMPROVEMENTS (VALUE: $129,900)
DEPARTMENT: 169 WASTEWATER; FUND: WASTEWATER

Please see the attached communication from Stephen Dookran, P.E., City Engineer, dated August 22,
2019 for information related to this contract.

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 City Engineer, Board of Public Works (August 22, 2019 BPW meeting) and the Purchasing
Department recommend the award of this contract in an amount of $129,900 to RWC Enterprise of
Nashua, NH.

Re: ectfully

. a
Flt

Dan Kooken
Purchasing Manager

Ce: S Dookran L Fauteux

229 Main Street ¢ Nashua, New Hampshire 03061 Phone (603) 589-3330 e Fax (603) 589-3232 |

To:

From:

Re:

B. Motion:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: August 22, 2019

Stephen Dookran, P.E., City Engineer
Engineering Department

Monica Drive Drainage Improvements

To approve a contract for Monica Drive Drainage Improvement Project with RWC
Enterprise for the amount not to exceed $129,900. Funding will be through
Department: 169 Wastewater, Fund: Wastewater; Activity: Stormwater Abatement.

The purpose of this project is to resolve a drainage issue on Monica Drive near Vickies
Drive by installing 325 LF of 12” PVC storm drain pipe, 340 LF of 8” perforated
underdrain pipe, two catch basins and reclaim the existing pavement between 10
Monica Drive to 6 Monica Drive. The new storm drain system along this section of the
street will help to rectify the extensive pavement deterioration caused by runoff and
allow stormwater to flow onto a drainage system.

The project was advertised on July 16, 2019. A non-mandatory prebid meeting was held
on July 23, 2019 and one bidder attended. Three contractors submitted qualified bids
on August 8, 2019. The bids are as follows:

Firm Bid
RWC Enterprises $ 129,900
Hollis Excavation $ 163,182

William P. Davis Excavation, LLC % 238,435

The bids were reviewed and RWC Enterprises of Nashua, NH is the recommended
qualified, low bidder. This request is to approve the award of the Monica Drive
Drainage Improvement Project contract to RWC Enterprises in the amount of $129,900.

THE CITY OF NASHUA “the Gate City’

Administrative Services

Purchasing Department

August 29, 2019
Memo #20-025

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: CONSENT DECREE — 2019 UPDATED LONG TERM CONTROL PLAN (VALUE: NOT-
TO EXCEED $487,760)
DEPARTMENT: 169 WASTEWATER; FUND: WASTEWATER

Please see the attached communication from Stephen Dookran, P.E., City Engineer, dated August 22,
2019 for information related to this contract.

Pursuant to NRO § 5-83 Professional Services (A) in the purchase of accounting, architectural, auditing,
engineering, legal, medical and ambulance services and purchases of independent professional
consultant services for personnel, data processing, actuarial, planning, management and other
comparable purchases competitive bidding shall not be required.

The City Engineer, Board of Public Works (August 22, 2019 BPW meeting) and the Purchasing

Department recommend the award of this contract in an amount not to exceed $487,760 to Hazen of
Manchester, NH.

Respectfully,

C! * Dar’ Kooken

Purchasing Manager

Ce: S Dookran L Fauteux

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

Te:

From

Re:

C, Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: August 22, 2019

Stephen Dockran, P.E., City Engineer
Engineering Department

Consent Decree
2019 Updated Long Term Control Plan

To approve the engineering consultant contract to Hazen of Manchester, NH tc
update the CSO ieng term control plan in an amount not to exceed $487,760.
Funding for this contract will be through Department: 169 Wastewater; Fund:
Wastewater; Activity: Consent Decree Operational.

Hazen Scope of Work and Fee

The City completed multiple projects from 1998 through 2015 to reduce the
frequency and volume of Combined Sewer Overflows (CSOs) discharging io the
Merrimack and Nashua Rivers so water quality can be improved as required by
the 1972 Clean Water Act. The CSO program was based first on a 1997 Long-
Term CSO Control Plan and then a 2003 Long-Term Water Quality and
Infrastructure Control Plan submitted to EPA and NHDES and various other
studies to investigate practicable and cost-effective measures to control CSOs.
All mandated CSO control projects have been implemented on schedule.

After review of completed CSO program, the EPA has concluded that further
CSO reduction is necessary. They have requested that the long-term control plan
be updated and projects identified to reduce or eliminate CSO’s under a “Phase 2”
~oO program. In addition, currently the City is also is subject to the 2017 New
Hamoshire Small MS4 General Permit that allows stormwater drain pipes to
discharge to local waterways. The EPA allows municipalities like Nashua with
multiple permits to use an integrated planning approach to prioritize and schedule
wastewater and stormwater projects based on the financial capability. This study
will develop recommend projects to comply with the EPA’s CSO Policy
requirement for LTCP development, and development of an Integrated Plan
consistent with EPA guidance and CWA requirements, meeting the goal of
improved water quality that is affordable and practical.

Hazen is currently working on the Capacity, Management, Operation and
Maintenance (CMOM) program tor both the sewer and storm drainage systems
Hazen has worked with the Engineering and Wastewater Departments on multiple

rojects related to the wastewater coilection system, the treatment plant and CSO
program, achieving satisfactory results. Hazen also manages the hydraulic model
INFO Works for the department. With their knowledge of the voth the
wastewater and stormwater systems, this study can be completed efficiently and
effectively. A significant part of the cost is the metering of the collection system.
This is required as part of this work due to the expansive changes in the

wastewater collection system since 1997 and rehabilitation work including
replacing and lining of sewers in portions of the City.

SUMMARY OF LABOR AND COSTS
CITY OF NASHUA, NH
CSO Long-Term Control Plan Update / integrated Plan

HAZEN AND SAWYER TEAM BUDGET

Notes:

1) Assumes 7 flow meters for 12 waaks (Flow Assessment quote, August 13, 2019)
2) Exclucies receiving water quality modeling/monitoring
3) Assumes 21 months total project duration

4) Asoumes 11 meatings total (Inclu

ig EPA quarterly updates)

: A . . : ry r TOTAL TOTAL LABOR & OTHER
Task Description resor Manager Engineer engineer (Peed PEER O” caLead MEI om. Hours “corans (NOIRECT INDIRECT. DIRECT. «FIXED FEE pot ans
Rates $77.23 $65.09 $33.03 $30.00 $87.94 $62.74 $84.63 $85.68 $60.10 OH 177.5% Profit 10.0%

4.0 Project Management, QA/QC, Meetings (11 meetings) 40 190 22 252 $76,183 844,924 $2,970 $4,492 $52,386
2.0 Existing Information/Data Review 8 40 40 2 2 82 $3,38 $9,386 sO $939 $10,324
3.6 Gharacterization of Existing Conditions (7 meters, 12 weeks} 4 30 so 50 214 $8,087 $22,449 341,510 $2,245 $66,204
4.0 Alternatives Analysis 16 40 400 80 24 320 24 904 $40,217 $111,642 sa $44,164 $122,807
6.0 Integrated Flan Framework 32 24 88 $4,193 $11,844 $0 $1,164 $42,805
6.0 Financlal Capability Analysis 4 4 32 160 200 $14,687 $26,084 $40,771 $0 $4,077 $44,848
7.6 Public Participation (City to lead) 9 $c $0 $0 80 $0 $o
8.0 PermitiRegulatory Requirement Assessment 8 16 16 32 72 $3,537 86,284 $9,818 $0 $982 810,806
9.€ Project Identification and Ranking & 40 40 8B $5,360 $9,519 $14,878 $0 $1,488 $16,366
10.0 Scenario Development, Optimization Model Runs, and Implementation Flan 8 80 40 428 $6,687 $14,865 546 $0 $1,855 $20,400
411.0 Draft and Final Report 40 120 400 120 80 16 32 40 32 880 $42,514 $75,504 $178,018 $1,000 $11,802 $130,820
587,760.

Hazen
SCOPE OF WORK.
CSO LONG TERM CONTROL PLAN UDPATE / INTEGRATED PLAN

GENERAL

The City of Nashua, NH developed and submitted a 1997 Long-Term CSO Control Plan and a
2003 Long-Term Water Quality and Infrastructure Control Plan to EPA and NHDES. Since
then, studies have been conducted to investigate more cost-effective measures to control CSOs
such as the Re-evaluation Study of CSO Control for CSO 005 and CSO 006 (March 2009).
These studies have resulted in modifications to some of the originally recommended elements
and associated implementation schedules that are in the current CSO Consent Decree Program.

The City has implemented all mandated CSO controls and has also developed and submitted a
CSO Post-Construction Monitoring Plan to EPA and NHDES. The EPA has since requested a
scope of work be developed for updating the Long-Term Control Plan in accordance with Clean
Water Act requirements.

The City is subject to the 2017 New Hampshire Small MS4 General Permit and has an ongoing
CMOM program for both the sewer and storm drainage systems. Through the integrated
planning approach as described in EPA’s "Integrated Municipal Stormwater and Wastewater
Planning Approach Framework,” a municipality, such as Nashua, can prioritize and schedule
wastewater and stormwater projects based on the municipality’s financial capability. This scope
of work is intended to comply with the EPA’s CSO Policy requirement for LTCP development,
and development of an Integrated Plan consistent with EPA guidance and CWA requirements.

SCOPE OF SERVICES

Task 1 — Project Management, QA/QC, Meetings

Project Management

Prepare a schedule including target submittal dates, anticipated review dates, and key meeting
dates. Prepare monthly progress reports presenting work activities completed during the reporting
period, budget status, schedule status, and identification of any out of scope items. Prepare
monthly invoices detailing project labor costs and other direct costs.

Quality Assurance / Quality Control (QA/QC)
QA/QC procedures shall be employed in order to maintain document quality. These procedures
will address the use of quality control reviews, engineering and calculations checking, and other

measures necessary to maintain a consistent, complete, high quality and compatible Integrated
Plan.

A QA/QC review will be conducted on every submittal prior to delivery to the City. These
reviews apply to all memoranda and reports generated for this project. Members of in-house
staff not associated with the project will be selected to perform these reviews.

August 2019 Page 1 of 7

CSO Long-Term Control Plan Update/Integrated Plan

Meetings

Consultant will meet with the City as needed throughout the project (6 per year, inclusive of
EPA quarterly meetings) to review project progress and obtain direction on technical work.
Consultant will develop and provide, for each meeting, agenda, schedule, presentation materials
(as needed) and minutes.

In addition to regular monthly meetings, Consultant will prepare for and attend quarterly
meetings with EPA/NHDES. Consultant will develop and provide, for each meeting, agenda,
schedule, presentation materials (as needed) and minutes.

All project deliverables will be provided to the City in both hard copy and electronic format (as
the City requires), and in both PDF and editable file format (e.g., word, CAD, etc.).

Deliverables:

e Two (2) copies of each monthly progress report.
e Two (2) copies of each monthly invoice.

e Meeting agendas and minutes.

Task 2 — Existing Information/Data Review

Consultant will collect and obtain prior CSO and stormwater planning documents as well as other
data from the City, including:
e 1997 Long-Term CSO Control Plan
2003 Long-Term Water Quality and Infrastructure Control Plan
2009 Re-evaluation Study of CSO Control for CSO 005 and 006
CSO Annual Reports submitted to EPA/NHDES
Minutes and related documents for pertinent agency/City meetings on CSO Consent
Decree program completion and acceptance
e The previous stormwater management plan and annual reports from 2004-2019
e Capital Improvement Plan processes, documents, reports, as available

Consultant will also obtain recent information from the City regarding operation of the collection
system that relates or impacts the combined sewer system performance. Review of the reports and
data collected will be performed to inform the background and existing conditions characterization
of the collection system, for the LTCP update.

Task 3 — Characterization of Existing Conditions

Existing receiving water and end-of-pipe water quality data will be collected (provided by City)
and reviewed. Consultant will request, based upon the review of this data, additional water quality
data collection (if required) for the purpose of characterizing existing conditions.

Temporary flow monitoring will be performed to characterize the response of the sewer system to
rainfall, and to re-calibrate the City’s InfoWorks collection system model. Existing conditions
model simulations will be performed to evaluate the current annual average (typical year)
performance of the system (e.g., CSO volumes, frequencies, percent capture).

August 2019 Page 2 of 7