SANBORN |||) HEAD
STANTS
TREE 20 Foundry Street
i Building Trust, Engineering Success. Concord, NH 03301
Mr. Jeff Lafleur December 21, 2018
Superintendent
Nashua Division of Public Works, Solid Waste Department Sent via email
840 West Hollis Street
Nashua, NH 03062
Re: Scope of Engineering Support Services
2019 GCCS Design & Canstruction-Phase Services
Four Hills Landfill
Nashua, New Hampshire
Dear Jeff:
Sanborn, Head & Associates, Inc. (Sanborn Head) appreciates the opportunity to provide this
scope of engineering services to the City of Nashua (City) relative to the 2019 expansion of
the gas collection and control system (GCCS} at the Four Hills Landfill. The scope of services
presented herein is based on communication with the City regarding the engineering
services needed to support this effort.
SCOPE OF SERVICES
Task 1 ~ Design & Bid Phase Services
For this task, Sanborn Head will prepare documents to support the 2019 expansion of the
GCCS. Our services will include:
s Preparing construction drawings, signed and stamped by a professional engineer
licensed in the State of New Hampshire, which will include:
a Acover sheet;
a Aplan-view drawing depicting the existing Phase [ and Phase II GCCS in relation to
the most recent site topography available to Sanborn Head;
a A plan-view drawing depicting the proposed 2019 GCCS expansion components
(including a proposed well schedule); and
o Details illustrating the proposed vertical wells, collection trenches, surface collectors,
and pipe connections, as required.
« Preparing technical specifications for the proposed 2019 GCCS expansion that describe
the construction materials, installation requirements, and construction quality contro]
requirements.
u Preparing Bid Item Definitions for the proposed GCCS components.
x Preparing an itemized Schedule of Values and Opinion of Probable Construction Cost for
the 2019 GCCS expansion,
SANBORN, HEAD & ASSOCIATES, INC.
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