To:
From:
Re:
C. Motion:
Attachments:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: November 20, 2017
Noelle Osborne, Plant Operations Supervisor
Wastewater Department
Waste Water Facility HVAC Upgrades
To approve the change order to the HVAC Upgrades contract with Monadnock Building
Company in the amount of $54,099.10. Funding will be through: Department: 169 -
Wastewater; Fund: Wastewater; Activity: AC & Air Handling.
Change Order 3 Backup
The contract with Monadnock Builders to rebuild the HVAC system in the Control and
Grit Buildings at the Wastewater Treatment Facility is currently for $896,956.00. This
includes the first two change orders, which were phased in work of the original scope.
This is the first change order beyond the original contract bid amount, and is for three
items. The first item is for additional duct and appurtenances needed for RTU-3 on the
roof due to an existing beam in the way of the original location. The second item is for
additional controls needed to operate a new air handler and heater in the basement of the
sludge processing building. The third item is for new duct heater, enthalpy economizers,
additional controls and electrical connections for the 3 roof top heating and air
conditioning units. This resulted from vendor and contractor feedback on a better method
to install and operate these 3 units.
The total amount of this change order comes to $54,099.1. Wright Pierce and the
Wastewater Department have reviewed these costs and it appears to be reasonable for the
work involved. The new value of their contract following approval of this change order
will be $951,055.10.
