To:
From:
Re:
A. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: February 27, 2020
Jeff Lafleur, Superintendent
Solid Waste Department
2020 Landfill Gas Collection and Control System Expansion Change Order #2
To approve Change Order #2 to the contract with SCS Field Services of Reston, VA
in the amount of $287,565 for the expansion of the Four Hills Landfill Gas
Collection and Control System (GCCS). Funding will be through Department: 168
Solid Waste; Fund: Bond; Activity: Landfill Gas Expansion FY20.
Schedule of Values
The City issued Change Order #1 to SCS Field Services to repair a gas header that
has failed. While SCS is onsite to do the repairs this month the Solid Waste
Department and Sanborn Head decided to have them install more wells and to make
additional repairs to the Landfill Gas Collection and Control System (GCCS). The
additional GCCS work was going to be completed this year to ensure the system is
capturing emissions and controlling odors. By doing the work now, while SCS is
already onsite, the Solid Waste Department is saving the City future mobilization
charges.
The Solid Waste Department’s engineering firm, Sanbomm Head and Associates, Inc.
(SHA) prepared the scope of work that will be performed in Change Order #2. This
work is required to control odors, mitigate fugitive methane surface emissions and
comply with the NHDES approved Operating Plan — Phase I] Secure Landfill
Expansion and the Landfill Gas Collection System Enhanced Monitoring
Protocol/Standard Operating Procedures (EMP/SOP).
