September 10, 2021 Page 2
20210910 Bridge St E Hollis St Nashua Sanborn Head Amend 1.docx 4381.00
SCOPE OF SERVICES
Our scope of services is divided into phases for Preliminary Design, Final Design, and
Construction Documents as follows:
Preliminary Design
Our preliminary design services include environmental sampling of near surface soils for
the presence of asbestos-containing soil in locations where new roadways are proposed in
existing landscaped areas. The results of this work will help inform the extent to which
asbestos-containing soil will need to be addressed in Construction Documents
(supplemental specifications and pay items).
Groundwater is not anticipated to be encountered during construction. As such, neither
groundwater sampling nor laboratory analysis of groundwater samples are proposed.
We understand that very little excess material will be generated as part of construction. As
such, we specifically excluded soil pre-characterization testing for off-site soil disposal.
Soils meeting the definition of Limited Reuse Soil (LRS)! are anticipated to be encountered
in the NHDOT State Right-of-Way and will be handled in accordance with the NHDOT
Generic LRS Soil Management Plan (SMP)?. As outlined in the SMP, LRS generated on-Site
may be reused within the project limits. As such, we assume that excavated urban fill soils
will be managed in accordance with the Generic SMP issued by NHDOT.
Task PD1 - Environmental Field Exploration
The purpose of the environmental field exploration is to obtain data that can be used to
inform if asbestos-containing soil is present, and if so, inform the preparation of Special
Provision Specifications and Pay Items for the earthwork. The environmental field
exploration is not intended to pre-characterize a defined volume of soil from a specific
project location and depth for direct excavation, load, and haul during the construction
contract. Further, this exploration does not include analysis for parameters typically
required by disposal facilities to obtain acceptance of the material for disposal. We assume
that if excess soil is generated as part of the construction and off-site disposal is required,
then the full suite of analyses required by the receiving facility will be completed and paid
for by the contractor during construction after the excess soil is stockpiled.
Prior to the environmental field explorations, we will prepare a proposed environmental
boring location plan for review by the project team. Upon acceptance, we will layout the
proposed boring locations in the field and notify DigSafe to obtain utility clearance as
required by law.
1 Defined by the New Hampshire Department of Transportation (NHDOT) as soils adjacent to roadways, on
property under the control of NHDOT, that require removal or relocation, that are likely (based on
“generator knowledge”) and/or demonstrated (through field screening or laboratory analyses) to contain
contaminants between naturally occurring background concentrations and NHDOT-specific Acceptable
Reuse Concentrations (ARCs).
2 “Soil Management Plan for Limited Reuse Soils/Unanticipated Potentially Contaminated Soils,” prepared by
NHDOT, dated October 16, 2017.
SANBORN HEAD
