To:
From:
Re:
Motion A:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: August 26, 2021
Jeff Lafleur, Superintendent
Solid Waste Department
2021 Landfill Gas System Expansion — Phase III
To approve a contract with SCS Field Services of Reston, VA to construct an
expansion of the landfill gas collection system in the amount of $457,720 pending
bond approval. Funding will be through Department 168 Solid Waste; Fund:
Bond; Activity: Landfill Gas System Expansion.
Scope of Services and Schedule of Values and Sole Source Memo
The City solicited a bid from SCS Field Services to construct an expansion of the
landfill gas collection system into the Phase III landfill. This phase of the landfill,
which was constructed in 2019 and began waste filling operations approximately
one year ago, has no gas collection infrastructure or wells. In order to prevent
odors and fugitive methane emissions, the existing gas co!lection system must be
expanded into this phase of the landfill. The Solid Waste Department’s
engineering firm, Sanborn Head and Associates, Inc. (SHA) prepared a
construction design to extend the main vacuum header into Phase III, construct a
condensate trap, install seven (7) new horizontal gas collection wells, and connect
six (6) leachate cleanout pipes to vacuum. This expansion of the gas collection
system is required to control odors, mitigate fugitive methane surface emissions
and comply with the NHDES approved Operating Plan — Phase PIN Secure
Landfill Expansion and the Landfill Gas Collection System Enhanced Monitoring
Protocol/Standard Operating Procedures (EMP/SOP).
SCS Field Services is the Solid Waste Department’s preferred vendor for gas
collection system construction. SCS specializes in this type of work and performs
landfill gas system construction projects nationally. They have constructed at least
90% of the existing gas system infrastructure in the Phase I/II landfill. Based on
the qualifications of SCS Field Services it is the recommendation of the
Superintendent of Solid Waste to accept SCS Field Services as the vendor to
perform the work listed above.
