To:
From:
Re:
B. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: February 25, 2021
Jeff Lafleur, Superintendent
Solid Waste Department
Landfill Gas Expansion (Concrete Block Wall Corrective Action)
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 $407,860. Funding
will be through Department 168 Solid Waste; Fund: Bond; Activity: Landfill Gas
Expansion.
SCS Services Fee Schedule
The City solicited a bid from SCS Field Services to construct an expansion of the
landfill gas collection system in the Phase II landfill specifically to address fugitive
methane emissions along the concrete block residential setback walls. Fugitive
emissions along the walls have been an on-going compliance issue and previous
corrective actions have not mitigated the problem. The Solid Waste Department’s
engineering firm, Sanborn Head and Associates, Inc. (SHA) prepared a
construction design to install nine (9) new vertical gas collection wells with liquid
pumping systems, Draintube surface collection layers, and HDPE geomembrane
over the ground surface adjacent to the walls. 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 I/II/IL 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/III 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.
