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SANBORN |||| HEAD sound Sree

Building Trust. Engineering Success. Concord, NH 03301
Mr. Jeff Lafleur September 2, 2016
Superintendent of Solid Waste File No. 3066.08
Nashua Division of Public Works, Solid Waste Department

840 West Hollis Street
Nashua, NH 03062

Re: Phase IV - Preliminary Opinion of Cost and Schedule Update for FY2017 (revised)
Four Hills Landfill, Nashua, New Hampshire

Dear Jeff:

We understand the City of Nashua (City) would like to include, as part of the City’s budget
for Fiscal Year 2017 (FY2017), costs for services required of Sanborn Head & Associates,
Inc. (Sanborn Head) to begin efforts to design and permit new landfill capacity in the area
between the closed Unlined Landfill and the active Lined Landfill at the Four Hills Landfill
in Nashua, New Hampshire (i.e., Phase IV). This letter summarizes such services, and
includes a preliminary opinion of cost for FY2017 in relation to Phase IV. The opinion of
cost may include some of the services that could be incurred after FY2017 (e.g., services
required during the permit review process).

Preliminary Opinion of Cost

Our preliminary opinion of cost for design/permitting services for Phase IV is based on
several assumptions relative to our understanding of current New Hampshire
environmental regulations including the Solid Waste Rules!, the existing conditions at the
Four Hills Landfill, the City’s projected waste receipts, and the remaining airspace in Phases
I and IJ. Based on our understanding, the Phase IV project would involve the following
major activities, listed in no particular order:

=» Removing the soil components of the closed Unlined Landfill’s geosynthetic final cover
system in the footprint area of Phase IV, constructing a liner system that meets the
requirements of the Solid Waste Rules and extending the liner system across the area
between the closed Unlined Landfill and the Lined Landfill to connect with the liner
system in the Lined Landfiil.

a Establishing new landfill access roads.

» Establishing new stormwater drainage channels, and_ possibly adding
detention/retention capacity.

1 In July 2014, the NHDES promulgated new Solid Waste Rules. Some of the new rules may impact the
design and permitting of the proposed Phase IV project (e.g., setback distances). For the purposes of this
letter, the scope and opinions presented herein assume that the Phase IV project is in compliance with the
new rules.

SANBORN, HEAD & ASSOCIATES, INC. www.sanbornhead.com

September 2, 2016 Page 2
20160902 Ph IV ltr - FY2017.docx 3066.08

a Relocating the main landfill gas (LFG) conveyance header pipe from between the closed
Unlined Landfill and the active Lined Landfill to the north and west of the active Lined
Landfill area.

=» Modifying the Phase I and II landfill gas collection and control system (GCCS) so that
that it may be connected to the relocated main LFG conveyance header pipe.

=» Decommissioning 12 existing groundwater monitoring wells and replacing some or all
of these wells.

We further understand that as part of the Phase IV permit application, the City would like
to include the following modifications for Phases I and II:

=» Modify the components of the final cover system to reflect current materials and design
standards; and

= Increase the inclination of the final sideslopes.

Figure 1 illustrates the potential scope of the Phase IV expansion. Based on the conceptual
layout, Sanborn Head estimates that developing the approximately 27-acre Phase IV
footprint area could provide on the order of 2.6 million cubic yards of landfill capacity.

Facility Permitting

Developing the proposed Phase IV area would require a Type I-A solid waste facility permit
modification as the new area would both increase the approved design capacity and extend
the date of the permit. In addition to modifying the Solid Waste Permit, an Alteration of
Terrain (AoT) permit, which addresses stormwater runoff and management, would be
required as well as a modification of the Groundwater Management Permit (GMP) and the
facilities’ Title V air permit. Services required to revise the GMP and Title V air permit are
expected to be performed after FY2017.

Preparation of an application for a Type I-A permit modification, would involve the
following:

= Preparing for signature by the City, the Type I-A application form;

s Preparing notifications to abutters and other potentially affected entities in accordance
with Env-Sw 314.08 and 303.05;

a Preparing Notice of Filings to potentially affected agencies as needed in accordance
with Env-Sw 303.06 through 12;

= Preparing a Site Report in accordance with Env-Sw 314.10, which could include, but not
be limited to, the following:
a Ademonstration of the siting requirements;
o ©Adescription of the existing conditions;
o Tax, land use, natural resource, and other related maps;
o Astatement of the need for the proposed expansion;

SANBORN ||) HEAD

September 2, 2016 Page 3
20160902 Ph IV Itr - F¥2017.docx 3066.08

o An evaluation of the potential impacts (both positive and negative) of the proposed
expansion;
o Astatement of the public benefit of the proposed expansion;

o A hydrogeologic report, to include an assessment of the depth to the groundwater
table and a preliminary work plan for groundwater monitoring piezometers; and

o A traffic study;

=» Preparing permit-level engineering drawings, specifications, and _ calculations
supporting the proposed design in accordance with Env-Sw 314.11;

a Updating the Operating Plan in accordance with Env-Sw 1105.11;
= Revising the Closure Plan in accordance with Env-Sw 1106.04; and

=» Preparing a Financial Report in accordance with Env-Sw 314.12 that provides an
opinion of cost to construct and operate Phase IV, projected tipping fees, and the type
and source of funding for the project.

The above application components are to be prepared in consideration of, and in
accordance with, the requirements of Env-Sw 315.05, 800, and 1000.

The table below summarizes our preliminary opinion of the cost for preparing permit
applications for Phase IV (the application fees are NOT included). Our opinion is based on
our understanding of: (i) the current NHDES AoT and Solid Waste Rules; (ii) our experience
preparing Type I-A permit modification applications in New Hampshire and similar permit
applications in other states; and (iii) our understanding of the type, extent, and quality of
the readily available information that can be used for the preparation of the AoT and Type
I-A permit modification applications. Additional assumptions made to develop the opinion
of cost are outlined towards the end of this letter.

TASK PRELIMINARY OPINION OF COST
Prepare AoT application $50,000
Prepare Type I-A permit modification application $250,000
Estimated Total Fee $300,000

The above preliminary opinion of cost is for engineering services during fiscal year 2017.
At this time, we recommend that the City budget and additional $200,000 for future fiscal
years for Sanborn Head to: (i) address NHDES comments to the AoT permit application and
Type I-A PMA; (ii) provide support at public hearings and meetings; (iii) prepare the Type
II PMA; and (iv) assist with preparing construction bid documents.

In addition to the costs identified above, the fee for Type I-A permit application is

estimated to be at least $20,000 (see Env-Sw 310.07). Furthermore, the AoT permit
application fee for the project could be on the order of $6,200 (Env-Wq 1503.32).

SANBORN ||} HEAD

September 2, 2016 Page 4
20160902 Ph IV ltr - FY2017.docx 3066.08

Assumptions

Response to NHDES comments for all applications will occur sometime after FY2017.

Services required to prepare for/attend public hearings will be performed after
FY2017.

Services required for preparing/submitting the GMP and Title V renewal will not be
required until after FY2017.

The City will make available for use all historic engineering and hydrogeologic studies,
permit applications, reports, drawings, and calculations related to the Four Hills
Landfill site; additional subsurface explorations are not included.

The City will provide recent topographic survey (i.e., 2016) of the proposed Phase IV
area in a digital format that is compatible with AutoCAD Civil 3D. The survey will be
geo-referenced to the existing site benchmarks, and references the state plane
coordinate and vertical datum used. The resulting topographic map will be produced at
a scale of 1 inch equals 40 feet, with 2-foot contours.

The budget and schedule do not factor an allowance for delays caused by possible
opposition or litigation.

Potential changes to the NHDES rules are not accounted for.

Field sampling or testing (groundwater, stormwater, surface water, soil, or waste) are
not accounted for; Sanborn Head will rely on historic information to be provided by the

City.

Closing

We appreciate the opportunity to be of continued service to the City. Please contact me
should you require additional information.

Very truly yours,
SANBORN, HEAD & ASSOCIATES, INC.

Fy Coe Eric S. Steinhauser, P.E., CPESC, CPSWQ

Senior Project Engineer Senior Project Director

RLC/RLC/ESS:ess

Enclosure: Figure 1 - Conceptual Layout, Phase VI Expansion Area

P:\3000s\3066.08\ Project Control\ Phase IV\20160902 Ph IV ltr - FY2017.docx

SANBORN || HEAD

CLOSED M
LANDFIL
EXISTING

Soames
SES

ASS

LFG CONVEYANCE

— = PIPE TO BE
RELOCATED

a
=

ii
Ss

ELC

Wi

Z

NDFILL

CLOSED MSW LA

WELLS TO BE
‘DECOMMISSIONED
AND MAY BE
REPLACED

S\ THE CITY OF NASHUA “The Gate City’

Financial Services

Purchasing Department

December 1, 2016
Memo #17-073

TO: MAYOR DONCHESS
FINANCE COMMITTEE

SUBJECT: CONTRACT FOR PHASE III DESIGN (VALUE: NOT TO EXCEED $200,000)
DEPARTMENT: 168 SOLID WASTE; FUND: BOND
ACTIVITY: LANDFILL EXPANSION PHASE III & IV

Please see the attached communication from Jeff Lafleur, Solid Waste Department Superintendent dated
October 27, 2016 for the information related to this purchase.

Pursuant NRO § 5-83 Professional Services, which allows the purchase of professional services without
soliciting competitive bids, the Solid Waste Department intends to award this work directly to Sanborn
Head and Associates.

The Solid Waste Department Superintendent, Board of Public Works (October 27, 2016 meeting) and the
Purchasing Department recommend the award of this purchase in an amount not to exceed $200,000 to
Sanborn Head and Associates of Concord, NH.

YOR
Purchasing Manager

Ce: J Lafleur L Fauteux

229 Main Street e Nashua, New Hampshire 03061 ¢ Phone (603) 589-3330 e Fax (603) 589-3344

To:

From:

B. Motion:

Attachments:

Discussion:

City of Nashua, Public Works Division

Board of Public Works Meeting Date: October 27, 2016

Jeff Lafleur, Superintendent
Solid Waste Department

To approve a contract with Sanborn Head and Associates Inc. to prepare and
submit a NHDES Type I Permit Modification and plans and specifications for the
construction of the Phase ITI lined landfill expansion in the amount not to exceed
$200,000. Funding through Department 168 Solid Waste; Fund: Bond; Activity:
Landfill Expansion Phase III & IV

Sole Source Memo, Sanborn Head and Associates scope of work

The Superintendent of the Solid Waste Department and the Director of Public
Works recommend that the City begin the process of designing and constructing
the Phase III lined landfill expansion. This is the final phase of the lined landfill
expansion permitted by the New Hampshire Department of Environmental
Services (NHDES) in standard permit #DES-SW-SP-95-002 issued on June 26,
1995. The Phase III landfill will be located adjacent to the southern boundary of
the Phase II landfill. It is anticipated to cover approximately 9.4 acres with an
estimated disposal capacity of 1.5 million cubic yards and a life expectancy of 10-
plus years. Work to be performed under this contract includes preparation of a
NHDES Type II Permit Modification application, construction plans and
specifications, an Alteration of Terrain (AoT) permit application, and an
evaluation of engineering alternatives to identify opportunities for improved
construction and operational methods and cost savings. The additional landfill air
space is not needed for several years; however, it is recommended that this Phase
be constructed within the next three years to ensure disposal capacity is available
when capacity in the Phase I/II landfill is exhausted.

COMMUNITY DEVELOPMENT Fea
DR) CONSTRUCTION OVERSIGHT

GRANT-DISASTER RECOVERY

LOUISIANA
DISASTER

PROJECT DESCRIPTION

In partnership with Cohn Reznick, Metric is currently
assisting the State of Louisiana through the Office of
Community Development-Disaster Recovery Unit (OCD-
DRU) with administering the Restore Louisiana Homeowner
Assistance Program, funded through HUD Sele TT A
Development Block Grant - Disaster Recovery (CDBG-DR)
funding, which was appropriated to assist homeowners

in Louisiana recover from what is being referred to as the
oe Floods of 2016. Our Team acts as the State's agent
or:

* Continued development of policies and procedures
that ensure that the Restore Louisiana Program (ReLa)
is operated efficiently and in compliance with HUD
regulations and the State Action Plan.

¢ Vendor oversight including audit of applicant files at
construction and eligibility stages to ensure compliance
with established program policy and applicabie HUD
regulations.

¢ Prevention and detection of fraud, waste, abuse and
mismanagement of ReLa funds.

« Establish internal controls and procedure te account
for duplication of benefits (DOB) in accordance with
the Stafford Act, program policy, and applicable HUD
guidance.

* Develop and execute monitoring procedures to test
compliance with federal and State regulations and
compliance with the State’s contractual agreements
with HUD.

+ Assist in developing and managing internal quality
control processes to ensure consistency among a large
number of construction contractors.

* Quality control of construction Scopes of Work (SOW)
and damage estimates as produced through the
Xactimate software.

@) Resilience + Recovery

KEY PROJECT FEATURES

* 12,500+ quality control reviews of
program inspection reports

« 9,500+ change orders processed
¢ Over 2,000 field inspections
conducted

CLIENT

Louisiana Office of Community
Development - Disaster Recovery Unit

REFERENCE

Jeff Haley, Chief Operating Officer
LaSalle Building

617 N. Third Street - 6th Floor
Baton Rouge, LA 70802

Phone: (225) 219-9660
Email: Jeff.Hatey@la.gov

www, femareoveryteam.com
1821 Commercial Drive, Suite $, Harvey, LA 70058

ge) THE CITY OF NASHUA "The Gate City’

Division of Public Works
Solid Waste Department

August 18, 2016

Re: Memo-— Sanborn Head & Associates Design, Permitting and Bid Document
Preparation — Phase III Landfill Construction

To: Daniel Kookan, Purchasing Manager
Carolyn O’Conner, DPW Financial Manager

This memo supports the Solid Waste Department’s request to issue a contract and purchase order to
Sanborn Head & Associates, Inc. (SHA) for $200,000 to prepare design, permitting and bid documents
for construction of the Phase III lined fandfill. This is the final phase of the lined expansion landfill
permitted by the New Hampshire Department of Environmental Services (NHDES) in standard permit
#DES-SW-SP-95-002 issued on June 26, 1995. The Phase II landfill will cover approximately 10 acres and
will be constructed adjacent to the southern boundary of the Phase II landfill.

Pursuant NRO § 5-83 Professional Services, which allows the purchase of professional services without
soliciting competitive bids, the Solid Waste Department intends to award this work directly to SHA. SHA
has served as the City’s consulting engineers for the Four Hills facility since approximately 2009,
providing expertise in environmental permitting, landfill gas design and construction, and other landfill
infrastructure projects. They have detailed knowledge of the site and the project requirements and
objectives. Retaining another engineering company to perform this work would result in duplication of
effort and delays. The construction of the Phase Ill lined landfill should commence within the next one
to two years to ensure the City’s waste disposal capacity is not interrupted when available capacity in
the Phase I/Il landfill is exhausted.

Respectfully Submitted,

Jeff Lafleur
Superintendent, Solid Waste Department

Cc: Lisa Fauteux, Director of Public Works

840 West Hollis Street » Nashua, New Hampshire 03062 e Phone (603) 589-3410 « Fax (603) 589-3448

SANBORN Hl; HEAD 20 Foundry Street

Building Trust. Engineering Success. Concord, NH 03301

Mr. Kerry Converse September 2, 2016
Landfill Engineer

Nashua Division of Public Works, Solid Waste Department

840 West Hollis Street

Nashua, NH 03062

Re: | Proposed Engineering Scope of Services
Type II Permit Modification Application and Construction Documents
Phase III Landfill Expansion, Four Hills Landfill, Nashua, New Hampshire

Dear Kerry:

Sanborn, Head & Associates, Inc. (Sanborn Head) is pleased to present our proposed
engineering scope of services to prepare a Type II Modification to Solid Waste Facility
Permit (Type II PMA) and construction documents for Phase III at the Four Hills Landfill.
Phase III is the third and final permitted expansion area associated with the lined landfill
approved by the New Hampshire Department of Environmental Services (NHDES) as
Standard Permit Number DES-SW-SP-002 issued on June 26, 1995, and modified on
February 27, 1998. Based on a review of available permitting documents, we understand
that the proposed Phase III expansion would consist of about 9.4 acres of lined area and
would provide about 1.0 million cubic yards (yd3) of airspace. Furthermore, we
understand that a portion of the 9.4-acre lined landfill expansion is located within the 500-
foot residential setback, and, as such, that portion of the expansion area would not be
eligible for waste placement and the projected airspace may be less than previously
calculated.

BACKGROUND

We understand the Phase | of the lined landfill began accepting waste in 2003 and that
Phase II began accepting waste in 2009. Construction permitting for each phase of the
lined landfill involved preparing a Type II PMA and an Alteration of Terrain (AoT) permit
application for NHDES review and approval. We anticipate that similar permit applications
will be required for Phase IIL.

According to the available permit documents, the design of the Phase III leachate collection
and transmission system is different than that constructed for the previous phases. While
Phases I and II incorporated a gravity leachate drain that includes a penetration through
the liner system at the north end of Phase I, the proposed liner base grading in Phase III
does not lead itself to continuing the gravity drain concept. Rather, a leachate collection
sump and pump system will be needed to remove leachate from the Phase III lined area.
We understand that the collected leachate will be pumped north to the leachate manhole
associated with Phase I, from which the leachate would drain by gravity to the City’s
wastewater treatment plant. Because a leachate pump system will be needed for the Phase
III expansion, Sanborn Head proposes to incorporate a supervisory control and data

SANBORN, HEAD & ASSOCIATES, INC. www.sanbornhead.com