To:
From:
Re:
B. Motion:
Discussion:
City of Nashua, Public Works Division
Board of Public Works Meeting Date: July 28, 2022
David L. Boucher, Superintendent
Wastewater Department
Primary and Secondary Digester Coating Project-John W. Egan Co. Change
Order #1
To approve change order 1 to the contract with John W. Egan Company for the
Primary and Secondary Digester Coating project in the amount not to exceed
$61,400. Funding will be through Department: 169 Wastewater; Fund:
Wastewater; Activity: Digester/Gas Tank Coating.
The primary digester and secondary digester coating project consists of coating
the primary digester, secondary digester, beams on stair-tower that have corrosion
on it, bridges between stair-tower and tanks, exterior metal ladder on the backside
of the energy recovery building, foundation of the secondary digester and new
gasket material around the base of metal on the gas tank.
As work progressed, other areas on or adjacent to the tanks were found to be in
need of restoration that could be added to this project. These items are coating the
metal skirt above the concrete foundation wall on the primary digester, coating an
exterior ladder on the dechlor building, coating a pipe lateral off the raw sewage
forcemain in wet weather building, restoring deteriorated roof top concrete on the
CS0O002 structure, clean and seal outer concrete ring-wall on primary digester,
and replace safety chain link fence on top of secondary digester. Egan’s estimated
costs for these items comes to $61,400.
The original contract amount if for $339,500. The new contract amount with CO1
approved comes to $400,900.
